Vertiv Liebert NX 225 kVA, Liebert NX 400 kVA, Liebert NX 300 kVA, Liebert NX 250 kVA, Liebert NX 600 kVA Installation Manual

Liebert® NX™ UPS

Installation Manual — 225-600kVA, 1.0PF, 60Hz, Three-Phase, Single-Module &
Multi-Module

CONTACTING VERTIV FOR SUPPORT

To contact Vertiv Liebert Services for information or repair service in the United States, call 800-543-2378.
Liebert Services offers a complete range of startup services, repair services, preventive maintenance plans and
service contracts.

For repair or maintenance service outside the 48 contiguous United States, contact Liebert Services, if available
in your area. For areas not covered by Liebert Services, the authorized distributor is responsible for providing
qualified, factory-authorized service.

For Liebert Services to assist you promptly, please have the following information available:

Part numbers: ___________________________________________________________________________________________________________
Serial numbers:__________________________________________________________________________________________________________
Rating: __________________________________________________________________________________________________________________
Date purchased:_________________________________________________________________________________________________________
Date installed: ___________________________________________________________________________________________________________
Location: ________________________________________________________________________________________________________________
Input voltage/frequency:________________________________________________________________________________________________
Output voltage/frequency:______________________________________________________________________________________________
Battery reserve time:____________________________________________________________________________________________________

Product Warranty Registration

To register for warranty protection, visit the Service and Support section of our Web site at:

www.liebert.com

Click on Product Registration and fill out the form.

TABLE OF CONTENTS

CONTACTING VERTIV FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.0 MECHANICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.3 Environmental Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.1 UPS Room. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.2 Storing the UPS and Batteries for Delayed Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3.3 Installation Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4 Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.4.1 Moving the Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.2 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.3 Raised-Floor Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.4 Kick Plates and Floor Anchors for Special Seismic Certification—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.5 Kick Plate Installation—Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.6 Special Considerations for 1+N Parallel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.7 Unpacking and Unloading the Cabinet from the Pallet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.5 System Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.6 Cable Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.0 UPS ELECTRICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Sizing the Input Breaker Feeding a Liebert NX UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3.1 Single or Dual Input Feeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.2 Automatic Transfer Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.3 Power Cable Connection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Control Cable and Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.4.1 Slot for Liebert IntelliSlot™ or ManageUPS™ Communication Cards—XS3 . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.4.2 Slot for LIFE Services Products—XS6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.4.3 Serial Interface for Liebert LIFE Services Cards (Serial Input/Output)—X6 . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.4.4 Connector for REPO (Input and Status)—XT3/8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.4.5 Customizable Output—TB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4.6 Customizable Input Contact—TB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4.7 Contact Control for Eco Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.4.8 Connector for Parallel UPS Connection—X19A, X19B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.4.9 RJ-45 Interface for Synchronization with External Signal—X20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.4.10 UPS Control Contacts with Battery Cabinet or Module Battery Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.4.11 UPS Control Contacts with Global Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2.5 Configuring Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2.5.1 Three-Wire Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.5.2 Preferred Grounding Configuration, Battery Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

2.5.3 High-Resistance Ground Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Vertiv |Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 i

2.6 Distributed Static Switch (1+N) System Cabling Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.0 OPTIONAL EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1 Single-Module System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.1 Input Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.2 External Battery Temperature Sensor—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.3 Matching Liebert NX Battery Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.4 Battery Interface Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.5 Local EPO Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2 Communication and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2.1 Remote Status Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2.2 Alber Monitoring System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2.3 Capacity on Demand (Softscale) Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.3 Multi-Module System Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.3.1 Paralleling Cable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.3.2 Load Bus Sync Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.3.3 Multi-Bus Synch Module (MBSM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FIGURES

Figure 1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Figure 2 Cabinet arrangement—Liebert NX matching battery cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 3 Grounding diagram—Three-wire single-module systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 4 Grounding diagram—Three-wire multi-module systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 5 System layout, 1+N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 6 SKRU connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 7 Control wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 8 REPO connections 1+N system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 9 Main components, 225-300kVA Liebert NX UPS, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 10 Outline drawing, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 11 225-300kVA low-voltage cable routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 12 Base Drawing, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 13 Terminal details, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 14 Terminal details Liebert NX 225kVA - 300kVA UPS 1+N multi-module or SMS . . . . . . . . . . . . . . . . . 29

Figure 15 Main components, 400-600kVA Liebert NX UPS, SMS and 1+N multi-module unit with

static bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 16 Outline drawing, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 17 Base Drawing, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static bypass . . . 32
Figure 18 Terminal details, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static

bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Vertiv |Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 ii

Figure 19 Terminal details Liebert NX 400kVA - 600kVA UPS 1+N multi-module or SMS. . . . . . . . . . . . . . . . . 34

Figure 20 Recommended control wiring for Liebert NX 225-600kVA single module, Eco Mode . . . . . . . . . . . 35

Figure 21 Recommended control wiring for Liebert NX 225-600kVA multi-module, Eco Mode . . . . . . . . . . . . 36

TABLES

Table 1 REPO connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 2 Customizable output contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Table 3 Customizable input contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Table 4 Battery interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Table 5 Maintenance bypass key status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Table 6 Maintenance Bypass SKRU Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Table 7 Liebert NX UPS specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 8 UPS rating at altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 9 Current ratings—rectifier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 10 Current ratings—battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 11 Recommended DC circuit breaker rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 12 Current ratings—bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 13 Current ratings—output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 14 Current-versus-time curves of overload capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 15 Recommended conduit and cable sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Table 16 Recommended torque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 17 Recommended lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 18 Components required for seismic configuration meeting OSHPD regulations . . . . . . . . . . . . . . . . . . 43

Vertiv |Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 iii

Vertiv |Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 iv

IMPORTANT SAFETY INSTRUCTIONS

!

!

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be followed during installation of your Liebert NX UPS.
Read this manual thoroughly, paying special attention to the sections that apply to your installation, before
working with the UPS. Retain this manual for use by installing personnel.

WARNING

Risk of electrical shock. Can cause personal injury or death.
This UPS has several circuits that are energized with high DC as well as AC voltages. Check for voltage
with both AC and DC voltmeters before working within the UPS. Check for voltage with both AC and DC
voltmeters before making contact.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and
glasses should be involved in installing the UPS or preparing the UPS for installation. When performing
maintenance with any part of the equipment under power, service personnel and test equipment should
be standing on rubber mats.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or those approved
for use in fighting electrical fires.
Extreme caution is required when performing installation and maintenance.
Special safety precautions are required for procedures involving handling, installation and maintenance of
the UPS system. Observe all safety precautions in this manual before handling or installing the UPS
system. Observe all precautions in the Operation and Maintenance Manual, SL-25434, before as well as
during performance of all maintenance procedures. Observe all DC safety precautions before working on
or near the DC system.

WARNING

Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel.

The UPS module weight is up to 4450 lb. (2019kg).
Locate center of gravity symbols and determine unit weight before handling each cabinet. Test lift and

balance the cabinets before transporting. Maintain minimum tilt from vertical at all times.
Slots at the base of the module cabinets are intended for forklift use. Base slots will support the unit only
if the forks are completely beneath the unit.
Read all of the following instructions before attempting to move, lift, or remove packaging from unit, or
prepare unit for installation.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 1

!

WARNING

!

!

Risk of electrical shock and fire. Can cause equipment damage, personal injury or death.
Under typical operation and with all UPS doors closed, only normal safety precautions are necessary.
The area around the UPS system should be kept free of puddles of water, excess moisture and debris.
Only test equipment designed for troubleshooting should be used. This is particularly true for

oscilloscopes.
Always check with an AC and DC voltmeter to ensure safety before making contact or using tools. Even

when the power is turned Off, dangerously high potential electric charges may exist at the capacitor
banks and at the DC connections.

All wiring must be installed by a properly trained and qualified electrician.
All power and control wiring must comply with all applicable national, state and local codes.
One person should never work alone, even if all power is disconnected from the equipment. A second
person should be standing by to assist and to summon help in case of an accident.

WARNING

Risk of electrical shock and fire. Can cause equipment damage, injury and death.
Internal battery strapping must not be removed. Failure to heed this warning could result in smoke, fire or

electric hazard. If strapping is removed, consult your local representative before attempting to transport
the battery cabinet.

NOTICE

This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J of FCC rules. These limits
provide reasonable protection against harmful interference in a commercial environment. This unit generates uses and
radiates radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause
harmful interference to radio communications. Operation of this unit in a residential area may cause harmful interference
that the user must correct at his own expense.

NOTE

Materials sold hereunder cannot be used in the patient vicinity (e.g., use where UL, cUL or IEC 60601-1 is
required). Medical applications such as invasive procedures and electrical life support equipment are subject to
additional terms and conditions.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 2

1.0 MECHANICAL INSTALLATION

!

1.1 INTRODUCTION

This section describes the requirements that must be taken into account when planning the positioning and
cabling of the Liebert NX uninterruptible power supply and related equipment.

This chapter is a guide to general procedures and practices that should be observed by the installing personnel.
The particular conditions of each site will determine the applicability of such procedures.

WARNING

Risk of electrical shock. Can cause injury or death.
Special care must be taken when working with the batteries associated with this equipment.
When they are connected together, the battery terminal voltage will exceed
400VDC and is potentially lethal.

NOTE

All equipment not referred to in this manual is shipped with details of its own mechanical and electrical
installation.

NOTICE

Risk of incorrect input power connection. Can cause equipment damage.
The standard Liebert NX UPS is suitable for connection to three-phase, three-wire plus ground input power.

NOTE

Do not apply electrical power to the UPS equipment before the arrival of the commissioning engineer.
Connecting power before the commissioning engineer determines the system is properly installed may void the
warranty.

1.2 PRELIMINARY CHECKS

Before installing the UPS, please carry out the following preliminary checks:

• Visually examine the UPS equipment for transit damage, both internally and externally. Report any damage to the shipper
immediately.

• Verify that the correct equipment is being installed. The equipment supplied has an identification tag on the interior doors
reporting the type, size and main calibration parameters of the UPS.

• Verify that the UPS room satisfies the environmental conditions stipulated in the equipment specification, paying
particular attention to the ambient temperature and air exchange system.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 3

1.3 ENVIRONMENTAL CONSIDERATIONS

1.3.1 UPS Room

The UPS module is intended for indoor installation and should be located in a cool, dry, clean-air environment
with adequate ventilation to keep the ambient temperature within the specified operating range (see
Environmental Parameters in Tab le 7).

The Liebert NX UPS is cooled with the aid of internal fans. To permit air to enter and exit and prevent
overheating or malfunctioning, do not cover the ventilation openings.

The Liebert NX UPS is equipped with air filters located behind the front doors. A schedule for inspection of the
air filters is required. The period between inspections will depend upon environmental conditions.

When bottom entry is used, the conduit plate must be installed.

NOTE

The UPS is suitable for mounting on concrete or other non-combustible surface only.

NOTICE

There is a potential risk to the operational integrity of an installed UPS system by the presence of foreign material inside or
in the vicinity of the UPS module.

This risk is especially high if conductive materials find their way inside the UPS module.
The risk potentially involves damage to the installed UPS equipment and subsequent degradation or loss of power to the

connected critical site load.
Vertiv applies the highest safety standards in equipment design to ensure that no live parts are exposed to external
contact, and also to ensure that the equipment is protected against the introduction of foreign bodies during operation.

However, it is not possible for Vertiv to ensure that foreign bodies will not be introduced during on-site installation, or
when the UPS doors and covers are “open” and the electrical terminals are exposed to allow power line connections to be
made by the electrical contractor/installer.

To prevent major disruption to site operations and risk to property and personnel, including the possibility of a fatality,
each site’s facility manager or construction manager must prevent foreign bodies from being introduced into the UPS
module.

All UPS modules are thoroughly inspected by Vertiv engineers prior to placement into service and testing on-site.
However, the person responsible for the site must ensure that the UPS module, and the immediate surroundings, are kept
clean and free from any possible conductive material such as metal foil, food wrappers, cable shields, washers and other

hardware, scrap metal and dust.
If the UPS system is shut down after placement into service and testing are completed, the UPS room must be kept clean

to avoid the possibility (during restart) of the considerable volume of air-flow produced by UPS operation to dislodge
and/or drag any foreign bodies into the equipment, which would result in system failure and possible supply interruption to
the critical site load, and several hours of downtime resulting from the damage typically associated with such events.
If the UPS is left running/operational at the completion of placement into service and testing, the room similarly needs to
be kept clean to prevent foreign bodies from entering the UPS module via its forced air-flow.

1.3.2 Storing the UPS and Batteries for Delayed Installation

If the Liebert NX system will not be installed immediately, it must be stored indoors in a clean, dry and cool
location (see Environmental Parameters in Tab le 7 ). If the UPS includes batteries, either internally or in a
battery cabinet, the batteries’ requirements will dictate the storage conditions. Batteries should be unpacked,
installed and charged as soon as possible after delivery.

NOTICE

Risk of failure to properly charge batteries. Can cause permanent damage to batteries and void the warranty.
Batteries will self-discharge during storage. Batteries must be recharged as recommended by the battery manufacturer. A

notice of “Charge Before Date” is affixed to each unit that has batteries inside. The “Charge Before Date” is calculated
based on the batteries being stored at 77°F (25°C). Storage at a higher temperature will increase the rate of self-discharge,
requiring earlier recharge. Consult the battery manufacturer on how to determine when the batteries need to be
recharged.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 4

1.3.3 Installation Altitude

!

The maximum operating altitude of the UPS, without derating, is 3300ft. (1000m). At higher altitudes the load
must be reduced according to Table 8.

1.4 POSITIONING

The cabinet is structurally designed to handle lifting from the base.

Access to the power terminals, auxiliary terminal blocks and power switches is from the front.

The door can be opened to give access to the power connection bars, auxiliary terminal blocks and power
isolators. The front door can be opened 90 degrees for more flexibility in installations.

1.4.1 Moving the Cabinets

The route to be traveled between the point of arrival and the unit’s position must be planned to make sure that
all passages are wide enough for the unit and that floors are capable of supporting its weight (for instance, check
that doorways, lifts, ramps, etc. are adequate and that there are no impassable corners or changes in the level of
corridors).

Ensure that the UPS weight is within the designated surface weight loading (kg/cm2) of any handling equipment.
For weight details, see Tab le 7.

Move the UPS with a forklift or similar equipment to ease the relocation and to reduce vibration. The optional
battery cabinets should be moved with a forklift or similar equipment.

When handling the UPS with a forklift or similar equipment, ensure any lifting equipment used in moving the UPS
cabinet has sufficient lifting capacity. When moving the unit by forklift, care must be taken to protect the panels.
Do not exceed a 15-degree tilt with the forklift. Bottom structure will support the unit only if the forks are
completely beneath the unit.

Handling with straps is not authorized.

WARNING

Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or death.
Because the weight distribution in the cabinet is uneven, use extreme care while handling and

transporting. Take extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel.
The UPS module weight is up to 4450 lb. (2019kg).

Locate center of gravity symbols and determine unit weight before handling each cabinet. Test lift and
balance the cabinets before transporting. Maintain minimum tilt from vertical at all times.

1.4.2 Clearances

The Liebert NX has no ventilation grilles at either side or at the rear of the UPS. Clearance around the front of the
equipment should be sufficient to enable free passage of personnel with the doors fully opened. It is important to
leave a distance of 24in (610mm) between the top of the UPS and any overhead obstacles to allow the module to
be serviced and to permit adequate circulation of air coming out of the unit.

1.4.3 Raised-Floor Installations

If the equipment is to be located on a raised floor, it should be mounted on a pedestal suitably designed to
accept the equipment point loading. Refer to the base view to design this pedestal.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 5

1.4.4 Kick Plates and Floor Anchors for Special Seismic Certification—Optional

For seismic resistant installations and OSHPD compliance, special floor anchors and kickplates must be used for
the UPS and matching battery cabinets; see Table 18.

The California Office of Statewide Health Planning and Development (OSHPD) enforces International Building
Code requirements for Special Seismic Certification except that the office reduces the required scope of
certifications.

1.4.5 Kick Plate Installation—Standard

Kick plates must be installed. If the unit is to be installed in a position that does not permit access to rear kick
plates, then the kick plates must be installed before the unit is placed in its final position.

1.4.6 Special Considerations for 1+N Parallel Systems

Consider the grounding configuration of your system before finalizing module placement See 2.5 - Configuring
Ground Connections.

Vertiv recommends matching the impedance in the bypass path of paralleled systems as closely as possible to
ensure good bypass current sharing.

The impedance mismatch can be minimized by controlling the wiring length of each unit. The design and the
layout of the UPS system and associated panels and cabling should be examined closely to ensure that cable
lengths and impedances are closely matched.

For Liebert NX Systems, the total combined cable length of the bypass feeder cables and the module output
cables for each module must be within 5% from maximum to minimum. The combined cable length is the sum of
the length from the common source feeding all the modules to the common output switchboard.

If the cabling impedances need to be greater than 5%, contact your Vertiv representative to calculate whether
the system will result in an overload condition when operating on bypass.

When bringing the 1+N system on-line for the first time or after removing one unit, Vertiv recommends checking
the bypass current mismatch. To check the bypass current mismatch:

1. Place a load on the bypass of each UPS module.

2. View the output current of each unit.

The accuracy of the currents displayed on the UPS module is sufficient for this check. If the mismatch is greater
than 5%, the bypass impedances must be balanced or the load must be limited to less than the maximum rating.

The output switchboard for any 1+N system must be configured with one Module Output Circuit Breaker (MOB)
for each UPS module that is to be connected to that switchboard. The breaker must be equipped with auxiliary
contacts that will be monitored by the UPS in order for interlocks to function properly and for the HMI to indicate
the bypassed status of the module.

Vertiv recommends using magnetic or thermomagnetic breakers. If molded case switches will be used, Vertiv
recommends installing breakers without electronic trip units or to set the trip units high enough to
accommodate high instantaneous currents that may be present when switching a module into an active bus.

For 225-250kVA Modules—Set instantaneous trip settings to allow for 2000A for 2 milliseconds.

For 400-600kVA Modules—Set instantaneous trip settings to accommodate 3000A for 2 milliseconds

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 6

1.4.7 Unpacking and Unloading the Cabinet from the Pallet

The utmost care must be taken when removing the packaging to prevent damage to the equipment. Check all
packaging materials to ensure that no important items are discarded. Once the packaging has been removed,
the UPS must be taken off the pallet by removing the retaining screws, as illustrated in Figure 1, and lifting the
unit off using a fork lift Do not remove the retaining brackets securing the UPS to the pallet because they are
used to fasten the UPS to the floor, except where OSHPD compliance is required and the optional OSHPD
seismic anchoring kits are used.

Figure 1 Unpacking

1.5 SYSTEM COMPOSITION

A UPS system can comprise a number of equipment cabinets, depending on the individual system design
requirements: e.g., UPS cabinet, battery cabinet, maintenance bypass cabinet. In general, all the cabinets used in
a particular installation are of the same height. Refer to the drawings provided in 4.0 - Installation Drawings for
the positioning of the cabinets as shown in Figure 2.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 7

1.6 CABLE ENTRY

Liebert

NX

UPS

Liebert

NX

Battery

Cabinet

Liebert

NX

UPS

Additional

Liebert

NX

Battery

Cabinets

Battery Cabinets must
be installed on left of
UPS to wire internally

Cables can enter the UPS cabinet from bottom or top into the input/output (I/O) section of the unit; see the
figures in 4.0 - Installation Drawings.

Figure 2 Cabinet arrangement—Liebert NX matching battery cabinets

If the cabinets are to be bolted together, the side panels must be removed before beginning.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 8

2.0 UPS ELECTRICAL INSTALLATION

!

!

This chapter provides guidelines for qualified installers who must have knowledge of local wiring practices
pertaining to the equipment to be installed.

WARNING

Risk of electrical shock. Can cause injury or death.
The UPS contains high DC as well as AC voltages. Check for voltage with both AC and DC voltmeters

before working within the UPS.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and
glasses should be involved in installing the UPS or preparing the UPS for installation.

2.1 EXTERNAL PROTECTIVE DEVICES

For safety, it is necessary to install circuit breakers in the input AC supply and external battery system. Given that
every installation has its own characteristics, this section provides guidelines for qualified installation personnel
with knowledge of operating practices, regulatory standards and the equipment to be installed.

External overcurrent protection must be provided. See Figure 14 for overload capacity.

2.2 POWER CABLES

The UPS requires both power and control cabling. All control cables, whether shielded or not, should be run
separately from the power cables in metal conduits or metal ducts that are electrically bonded to the metalwork
of the cabinets to which they are connected.

The cable design must comply with the voltages and currents in Ta bles 9 through 12, follow local wiring
practices and take into consideration the environmental conditions (temperature and physical support media),
room temperature and conditions of installation of the cable and system’s overload capacity (see 5.0 -
Specifications).

WARNING

Risk of electrical shock. Can cause injury or death.
Before cabling the UPS, ensure that you are aware of the location and operation of the external isolators

that connect the UPS input/bypass supply to the power distribution panel.
Check that these supplies are electrically isolated, and post any necessary warning signs to prevent their

inadvertent operation.

When sizing battery cables, a maximum volt drop of 2VDC is permissible at the current ratings given in Table 12.

The following are guidelines only and are superseded by local regulations and codes of practice where
applicable:

• The grounding conductor should be sized according to the fault rating, cable lengths, type of protection, etc. The
grounding cable connecting the UPS to the main ground system must follow the most direct route possible.

• Consideration should be given to the use of paralleled smaller cables for heavy currents, as this can ease installation
considerably.

• AC and DC cables must be run in conduits according to local codes, national codes and standard best practices. This will
prevent creation of excess EMI fields.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 9

2.3 SIZING THE INPUT BREAKER FEEDING A LIEBERT NX UPS

NOTE

See 3.2.3 - Capacity on Demand (Softscale) Upgrades.

Nominal input current (considered continuous) is based on full-rated output load. Maximum current includes
nominal input current and maximum battery recharge current (considered noncontinuous).

Continuous and noncontinuous current are defined in the NEC.

Maximum input current is controlled by the current limit setting, which is adjustable. Values shown are for
maximum current limit. If a smaller input feed breaker is used, the input current limit can be adjusted; see your
Vertiv representative for more information. The input current limit should not be set less than 105% of the
current needed to support the inverter at full load for normal operation.

This results in sufficient power to recharge the battery in a reasonable time and to operate over the published
input voltage range.

2.3.1 Single or Dual Input Feeds

The Liebert NX 225-600 kVA may be fed from single reference sources or dual asynchronous sources. If a
single-input configuration will be used, the utility source must be cabled to the rectifier input busbars. See

Figures 13 and 18.

2.3.2 Automatic Transfer Switches

If the UPS is to be fed from an automatic transfer switch, the transfer switch must have a programmed delay of
100 milliseconds for transfers between two sources.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 10

2.3.3 Power Cable Connection Procedure

!

!

!

The rectifier input, bypass, output and battery power cables (all require lug-type terminations) are connected to
busbars in the I/O sections (refer to 4.0 - Installation Drawings).

Equipment Ground

The equipment ground busbar is in the I/O sections as shown in (refer to 4.0 - Installation Drawings). The
grounding conductor must be connected to the ground busbar and bonded to each cabinet in the system.

All cabinets and cabling should be grounded in accordance with local regulations.

NOTE

Proper grounding reduces problems in systems caused by electromagnetic interference.

WARNING

Failure to follow adequate grounding procedures can result in electric shock hazard to personnel, or the
risk of fire, should a ground fault occur.

All operations described in this section must be performed by properly trained and qualified electricians
or technical personnel. If any difficulties are encountered, contact Vertiv. See the back page of this
manual for contact information.

Once the equipment has been positioned and secured, connect the power cables as described below (refer to
the appropriate cable connection drawing in 4.0 - Installation Drawings):

1. Verify that the UPS equipment is isolated from its external power source and all the UPS power isolators are open.

2. Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent
operation.

3. Open exterior and interior panels on the front of the I/O sections.

4. Connect the ground to the equipment ground busbar located in the I/O sections.

5. Make power connections and tighten the connections to the proper torque.

Ensure correct phase rotation.

WARNING

Risk of electrical shock. Can cause injury or death.
If the load equipment will not be ready to accept power on the arrival of the commissioning engineer,
ensure that the system output cables are safely isolated at their termination.

WARNING

Risk of electrical shock. Can cause injury or death.
When connecting the cables between the battery extremities to the circuit breaker, always connect the

circuit breaker end of the cable first.

6. For control connection details, see 2.4 - Control Cable and Communication.

7. Close and secure the interior and exterior doors.

8. Attach the kick plates to the bottom of the unit.

NOTE

If the unit is to be installed in a position that does not permit access to rear kick plates, then the kick plates must
be installed before the unit is placed in its final position.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 11

2.4 CONTROL CABLE AND COMMUNICATION

Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery system
(external battery circuit breaker), communicate with a personal computer or provide alarm signaling to external
devices, or for Remote Emergency Power Off (REPO). Refer to Figures 9 and 15.

The Liebert NX is equipped with the following interfaces:

• XS3 - Slot for Liebert IntelliSlot™ or ManageUPS™ communication card

• XS6 - Slot for LIFE

•X3 - Reserved

• X6 - Serial interface for external LIFE Services

•XT1/2 - Not Used

•X9 - Reserved

• XT3/8 - 4-pole screw connector for REPO Input and REPO Status

•XT4 - Reserved

• TB1 - 16-pole screw connector for input contacts

• TB2 - 16-pole screw connector for output contacts

• X19A/B - 2x15-pole connectors for parallel UPS connection

• X20 - RJ-45 interface for synchronization with external signal

•XT1 - Not Used

• TB3 - Battery Interface and Key Status

• TB4 - SKRU Enable

2.4.1 Slot for Liebert IntelliSlot™ or ManageUPS™ Communication Cards—XS3

This slot is the interface for the Liebert network communication cards. This adapter provides an independent
external network interface for communication with network monitoring and building management systems.

™

Services modem

Units built since June 2016 are equipped with either the Liebert IntelliSlot system or the ManageUPS system.
Previous units included a factory-installed ManageUPS system, which provided connectivity to SNMP and
Modbus.

The Liebert IntelliSlot platform includes the Liebert IS-UNITY-DP™ and Liebert IS-485 EXI™ cards. The platform
communicates with Vertiv software tools and services, including Trellis®, Liebert SiteScan® Web and Liebert
Nform®.

The Liebert IS-UNITY-DP supports up to two third-party protocols along with HTTP/S (Web), Vertiv Protocol,
SMTP and SMS.

Third-party protocols available on the Liebert IS-UNITY-DP card are:

• BACnet IP—BACnet over Internet Protocol

• BACnet MSTP—BACnet Master-Slave/Token-Passing (MSTP) communications protocol over an RS-485 serial network
(also known as BACnet MSTP RS-485)

•Modbus RTU

•Modbus TCP

•SNMP versions 1, 2c and 3

NOTE

No more than two protocols may be enabled on one card.

Only one version of BACnet may be selected, either BACnet IP or BACnet MSTP.

Only one version of Modbus may be selected, either Modbus TCP or Modbus RTU.

Only one of the protocols can use the 485 port; choosing two 485 protocols will cause conflicts.

The Liebert IS-485 EXI Card connects to a Liebert SiteLink-E™, allowing Liebert SiteScan Web 4.0 monitoring
and control.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 12

Protocols available on the ManageUPS card, depending on the card model, are:

!

• Modbus RTU—Modbus Remote Terminal Unit (RTU) communication protocol over RS-232, RS-422 and RS-485

• Modbus TCP—Modbus Transmission Control Protocol over Internet Protocol (also known as Modbus TCP/IP)

•SNMP version 1

•Ethernet

•HTTP/Web

2.4.2 Slot for LIFE Services Products—XS6

This slot is the reserved interface for LIFE Services modem card. This card provides an independent external
modem interface for communication with LIFE Services service station. Ask your local Vertiv representative for
more details on LIFE Services and its benefits for your UPS system.

2.4.3 Serial Interface for Liebert LIFE Services Cards (Serial Input/Output)—X6

The service interface is a SUB-D nine-pin male connector for RS-232 serial communication. It is used for
communications with external LIFE Services or other special Liebert applications.

2.4.4 Connector for REPO (Input and Status)—XT3/8

This four-pole screw connector allows:

• Switching off the UPS from a remote source (e.g., push button)

• Providing status to an external system regarding whether the REPO is active

To perform a remote emergency power off, it is necessary to connect an emergency stop button to the UPS via a
shielded cable not exceeding 66ft. (20m) in length. The switch must be “Closed” under normal operating
conditions and be equipped with a mechanism that maintains it in the “Open” position after it has been pressed.
If this button is not installed, a jumper lead must be connected between Pins 1 and 2. For an indication of REPO
status, connect Pin 3 and Pin 4 to an external system.

Table 1 REPO connection

Pin Signal Explanation

1 & 2 REPO Input Contact REPO active when open

3 & 4 REPO Status Contact Open when REPO is active

Use 16-22AWG cable.

WARNING

The external push button must be voltage free and isolated from all sources and GND. The external REPO
system must not exceed 24V and 20mA.

NOTE

The external EPO switch must latch open when activated.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 13

2.4.5 Customizable Output—TB2

!

This 16-pole screw connector allows the connection of six individual configurable output contacts. Each contact
is rated for 24VDC 1A. The maximum potential difference between the pins must not exceed 24VDC.

Table 2 Customizable output contacts

Pin

Signal Explanation

1 Normally Closed

2 Normally Open

3 Normally Closed

4 Normally Open

5 Normally Closed

6 Normally Open

7 Normally Closed

8 Normally Open

9 Common Pins 1-8

10 Not Available

11 Normally Closed

12 Normally Open

13 Common Pins 11-12

14 Normally Closed

15 Normally Open

16 Common Pins 14-15

Alarm Summary

Bypass Active

Low Battery

AC Fail

Selectable

Selectable

Use 16-22AWG cable. The selectable contacts can be customized (by qualified technicians only) to perform
various functions.

2.4.6 Customizable Input Contact—TB1

This 16-pole screw connector allows the connection of four individual configurable input contacts.

Each contact is rated for 24VDC 1A. The maximum potential difference between the pins must not exceed 24VDC.

Table 3 Customizable input contacts

Pin

Signal Explanation

1 Input #1 (24VDC out)

2 Input #1 (24VDC signal)

3 Input #2 (24VDC out)

4 Input #2 (24VDC signal)

5 Input #3 (24VDC out)

6 Input #3 (24VDC signal)

7 Input #4 (24VDC out)

8 Input #4 (24VDC signal)

9-16 Common Pins 1-8 Not Available

1. This contact is used for the MBB auxiliary contacts. See Figure 5.

2. For 1+N systems, the auxiliary contacts for the MOB breaker must be connected to these inputs. See Figure 5. A shorting switch may be connected here for
Load Bank Breaker/Testing.

Selectable

Selectable

Selectable

Selectable

1

2

Use 16-22AWG cable. All input contacts can be programmed using service software.

WARNING

To drive the inputs, use no-voltage contacts. Do not use voltages supplied by external power supply.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 14

2.4.7 Contact Control for Eco Mode

An active economizer Eco Mode is enabled on the Liebert NX 225-600kVA UPS. The mode is incorporated in all
single-module systems and in multi-module (distributed bypass) units with Firmware Version 1.04 or newer.

For details on Eco Mode operation, refer to the Liebert NX operation manual, SL-25354, available at the Liebert
Web site: www.liebert.com. See Figures 20 and 21 for recommended wiring layout.

Eco Mode must be set up by an Vertiv Liebert Services customer engineer. Once set up, Eco Mode becomes the
default operating mode: It shifts the load to bypass if utility power is within specified limits and to
double-conversion (on-line) mode if utility power falls outside the limits.

The UPS can be set up so that Eco Mode can be activated and deactivated by the operator. A Liebert Services
engineer must program an input contact to suppress Eco Mode. A key switch or other device, supplied and
installed by others, can be used to provide the signal that deactivates Eco Mode to the input contact. Operating
the key switch (or other device) allows the UPS to return to Eco Mode as its default mode of operation. Contact
Liebert Services for details.

Additionally, a standby generator mode is available that may be activated by a contact closure (typically from the
generator). This mode shuts Off battery charging and brings the UPS out of Eco Mode while the generator is
providing the power.

2.4.8 Connector for Parallel UPS Connection—X19A, X19B

This interface is used for paralleling two or more UPS’s with each other.

2.4.9 RJ-45 Interface for Synchronization with External Signal—X20

This interface is used to communicate with an external synchronization device, such as Load Bus Sync Module
(for two modules only) or the Multibus Sync Module (for up to 11 modules). See the manuals related to these
options for more details.

The interface can be used to synchronize the outputs of multiple UPS devices, even when they do not have a
common output. This enables an external static switching device to commutate between UPS outputs in the
event of a malfunction, without creating synchronization problems.

2.4.10 UPS Control Contacts with Battery Cabinet or Module Battery Disconnect

These contacts are used to communicate between the UPS module and Battery cabinets or Module Battery
Disconnects.

Table 4 Battery interface

Ter mi na l

Block Pin Connects to (Description of External Item)

1 Battery Interface Board TB1154-1

TB3

2 Battery Interface Board TB1154-2

3 Battery Interface Board TB1154-3

4 Battery Interface Board TB1154-4

Use Belden 9156 equivalent wire. Total length of cable from UPS to all battery interface connections must be less
than 1000ft (300m).

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 15

2.4.11 UPS Control Contacts with Global Maintenance Bypass

!

These contacts are used to communicate between the UPS module and Maintenance Bypass.

Table 5 Maintenance bypass key status

Ter mi na l

Block Pin Description

5 Key status switch, closed = key inserted

TB3

1. See 2.6 - Distributed Static Switch (1+N) System Cabling Layouts for 1+N systems with a Maintenance Bypass.

2. Key Status Input must be Form-C contact.

6 Key status switch, common

7 Key status switch, closed = key removed

Use 14AWG cable wire up to 500ft. (150m).

Table 6 Maintenance Bypass SKRU Enable

Ter mi na l

Block Pin Description

1 Maintenance Bypass Cabinet, closed = load not on inverter

TB4

1. For 1+N systems with a maintenance Bypass, these contacts must be run to each module from an isolated source.

2. These contacts must be run separately from all other control cables.

2 Maintenance Bypass Cabinet, common

3 Maintenance Bypass Cabinet, closed = load on inverter

Use 14AWG cable wire up to 500ft. (150m)

2.5 CONFIGURING GROUND CONNECTIONS

Liebert NX 225-600kVA is compatible with solidly grounded wye sources or a high resistance ground system, if
compatible. Refer to 2.5.3 - High-Resistance Ground Systems.

NOTE

Early production models may not be compatible with high-resistance ground systems.

Improper grounding is the largest single cause of UPS installation and startup problems. Grounding techniques
vary significantly from site to site, depending on several factors.

Proper grounding should be based on the appropriate NEC sections, but safe and proper equipment operation
requires further enhancements. The following pages detail recommendations for grounding various system
configurations to ensure optimal UPS system performance.

CAUTION

The UPS ground lug must be solidly connected to the service entrance ground by an appropriately sized
wire conductor per the NEC.

Each conduit or raceway containing phase conductors must also contain a ground wire, both for UPS
input and output, which are solidly connected to the ground terminal at each termination point.
Conduit-based grounding systems tend to degrade over time. Therefore, using conduit as a grounding
conductor for UPS applications may degrade UPS performance and cause improper UPS operation.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 16

2.5.1 Three-Wire Input Connections

UPSSource

G

N

BPSS

To Connect Equipment

G

This configuration must NOT be used when single-phase loads are directly connected to the UPS. Please note
that whenever the UPS module transfers to or from bypass, two AC sources (UPS output and bypass) are briefly
connected together and circulating current must flow. In this configuration, the current flows through the ground
path, possibly tripping ground fault interrupters (GFI’s) and distorting the output voltage waveform. Proper
adjustment of ground fault interrupters is necessary to avoid unwanted tripping. The time delay should be set to
at least 0.2 seconds to prevent tripping when the UPS performs a transfer or retransfer operation.

NOTICE

Risk of improper installation. Can cause equipment damage.
Failure to set the ground fault interrupters properly could cause loss of power to the critical load.

Figure 3 Grounding diagram—Three-wire single-module systems

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 17

Figure 4 Grounding diagram—Three-wire multi-module systems

UPS

Source

G

N

BPSS

G

UPS

BPSS

G

UPS

BPSS

G

Switchgear

To connect equipment

G

2.5.2 Preferred Grounding Configuration, Battery Systems

Battery cabinet systems must be connected as floating (ungrounded) systems.

Center-tapped or grounded battery systems are not possible with battery cabinet systems.

Whether the battery system is open-rack or cabinet, the metal rack parts or cabinet must be grounded to the
UPS module ground bus.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 18

2.5.3 High-Resistance Ground Systems

Liebert NX 400-600kVA units produced on or after August 1, 2013, with serial numbers as indicated below, are
compatible with High Resistance Ground (HRG) applications. Earlier production units may NOT be compatible
with HRG application and may either bear no label or be specifically labeled as not compatible. If the Liebert NX
UPS is NOT labeled as either compatible or not compatible, contact the factory before installing the unit in an
HRG application.

Liebert NX Serial Numbers/Compatibility with High Resistance Ground

NX 225-600 kVA serial numbers are structured as follows:

21 XXXXXXXX 1 38 X XX XXXX

(Digits 12, 13 and 14 are underlined above)

Digits 12 and 13 of the serial number represent the year of production

Example—1 3 = calendar year 2013; 1 4 would represent calendar year 2014.

Digits 1 and 3 represent the month

Example—1-9 = January-September, A = October, B = November, C = December
(e.g. 1 38 = August 2013, 1 3C= December 2013)

HRG compatibility was instituted for Liebert NX 400-600kVA units effective August 1, 2013, so serial numbers
with Digits 12,13 and 14 of 1 38 or higher designate Liebert NX 400-600kVA units that have HRG compatibility.

Contact the factory for HRG compatibility for Liebert NX 225-300kVA units.

2.6 DISTRIBUTED STATIC SWITCH (1+N) SYSTEM CABLING LAYO UTS

The output switchboard for a 1+N system must be configured with one Module Output Circuit Breaker (MOB) for
each UPS module to be connected to that switchboard. The breaker must be equipped with auxiliary contacts
that will be monitored by the UPS so that interlocks will function properly and for the HMI to indicate the
bypassed status of the module. Vertiv recommends using magnetic or thermomagnetic breakers. If molded case
switches will be used, Vertiv recommends installing breakers without electronic trip units or to set the trip units
as follows:

• For 225-300kVA Modules: 2000A for 2 milliseconds

• For 400-600kVA Modules: 3000A for 2 milliseconds.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 19

Input

Output

MBB

TB1

UPS 1

MOB1

MOB2

MOB3

RFB1

RFB3

BIB1

MBB

Source

Bypass

BIB3

BIB2

MIB

REPO Switch

(Optional)

RFB2

REPO Switch

(Optional)

1 2 3

5 6 73 4

1 2 1 2

REPO

XT3/8

MBE

TB4

Key Status

TB3

MOB

TB1

NC Com NO

UPS 2

Output

MBB

TB1

Bypass

REPO

XT3/8

Input

1 2

1 2

1 2 3

5 6 73 4

MBE

TB4

Key Status

TB3

MOB

TB1

NC Com NO

UPS N

See detai l

on SKRU

Connec tion

Page

Output

MBB

TB1

Bypass

REPO

XT3/8

Input

1 2

1 2

1 2 3

5 6 73 4

MBE

TB4

Key Status

TB3

MOB

TB1

NC Com NO

REPO Switch

(Opt ional)

NC Com NO

NC Com NO

NC Com NO

See detai l

on SKRU

Connec tion

Page

See detai l

on SKRU

Connec tion

Page

Figure 5 System layout, 1+N

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 20

Figure 6 SKRU connections

UPS 1

MBE

TB4

Key Status

TB3

MBE

TB4

Key Status

TB3

MBE

TB4

Key Status

TB3

UPS 3

UPS 2

Switchgear or Panelboard Cabinet

Powered from Critical Bus

1

120VAC

Neutral

4

Transformer

provided by

others

Fuse

Fuse

Fuse

6 14

12

1198

Key

Push Button

for Key Release

Contact position shown
for key in captive
position.

7

1013

Lamp

3 5

Auxiliary contacts from the SKRU must be isolated.

3 65 8 9 11 12 14 13 10 7

1

4

1 2 35 6 71 2 31 2 3 5 6 75 6 7

UPS #1

X19/B X19/A

UPS #2

X19/B X19/A

UPS N

X19/B X19/A

Figure 7 Control wiring

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 21

Figure 8 REPO connections 1+N system

REPO

XT3/8

12

REPO

XT3/8

12

REPO

XT3/8

12

UPS 1

Switchgear or Panelboard Cabinet

1 97643

REPO Relay Contacts

852

All auxilliary contacts from the REPO must be isolated.

UPS 2

UPS N

1

3

4 6

7

9

2

5

8

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 22

3.0 OPTIONAL EQUIPMENT

3.1 SINGLE-MODULE SYSTEM OPTIONS

3.1.1 Input Circuit Breaker

The input circuit breaker, which feeds the rectifier, is a option because some configurations may not require this
if a maintenance bypass with a rectifier input breaker is located close to the UPS module

3.1.2 External Battery Temperature Sensor—Optional

For systems that do not use Liebert NX Battery Cabinets, an optional temperature sensor can be installed to
monitor the battery cabinet or ambient room temperature. This sensor is connected to the BIB board. This
sensor will allow the Liebert NX UPS to perform temperature compensation charging.

3.1.3 Matching Liebert NX Battery Cabinet

The optional matching Liebert NX Battery Cabinet can be used to obtain the desired autonomy time. The
battery cabinets are designed to be either attached to the UPS or separate from the UPS (for details, see the
Liebert NX Battery Cabinet installation manual, SL-25430, available at Liebert’s Web site: www.liebert.com)

3.1.4 Battery Interface Box

The battery interface box contains a battery interface board. The battery interface box is required when an NX
225-600kVA UPS is installed with any non-Liebert battery cabinet, non-matching MBD or Battery Isolation
Switch (BIS).

One battery interface box is required for each non-Liebert battery cabinet, MBD or BIS.

3.1.5 Local EPO Button

A local EPO button with protective cover is available. This option is typically installed at the factory but may be
field-installed by Liebert Services.

3.2 COMMUNICATION AND MONITORING

• Liebert IS-UNITY-DP™ card, supports any two of the following: BACnet IP; BACnet MSTP; Modbus RTU; Modbus TCP; and
SNMP versions 1, 2c and 3

•Liebert IS-485 EXI

• ManageUPS

3.2.1 Remote Status Panel

Available as surface mount. The power supply for the remote status panel is factory-installed in the UPS module
and must be ordered with the unit.

3.2.2 Alber Monitoring System

The matching Liebert NX Battery Cabinet allows installing an optional Alber® battery monitoring system in the
cabinet. The Alber battery monitoring by Liebert continuously checks all critical battery parameters, such as cell
voltage, overall string voltage, current and temperature. Automatic periodic tests of internal resistance of each
battery will verify the battery’s operating integrity.

Additional capabilities include automatic internal DC resistance tests and trend analysis, providing the ability to
analyze performance and aid in troubleshooting.

3.2.3 Capacity on Demand (Softscale) Upgrades

Modules that were ordered and installed as Capacity on Demand soft-scalable modules can be upgraded to
either full 300kVA/KW (from 225 or 250kVA/kW) or 600kVA KW(400 and 500kVA/kW). If this upgrade is
planned, breakers and conductors should be sized for the final capacity.

™

card connects to Liebert SiteLink-E for Liebert SiteScan® Web monitoring

™

card: SNMP v1, Ethernet, HTTP/Web; Modbus RTU and Modbus TCP.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 23

3.3 MULTI-MODULE SYSTEM OPTIONS AND ACCESSORIES

The accessories and options listed in sections 3.1 through 3.2.1 may be applied to the individual modules in a
multi-module (1+N) system or a synchronized dual bus (2N) system.

3.3.1 Paralleling Cable Kit

A DB-15 module-to-module communication cable is required for 1+N parallel systems. A kit with two cables, each
82ft. (25m) long, is available. At least one kit is required for each add-on UPS module; the number of kits required
is one fewer than the number of UPS modules in the 1+N system (e.g., six UPS modules would require five kits).

3.3.2 Load Bus Sync Controller

Distributes common reference synchronization signal for up to two Liebert NX 225-600 UPS modules. A typical
installation would have two modules synchronized to a common bypass line.

3.3.3 Multi-Bus Synch Module (MBSM)

This module is available to support up six or up to 11 UPS modules, and is generally configured to synchronize all
modules to a reference bus (e.g., bypass line). See the manual for this module for more details.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 24

4.0 INSTALLATION DRAWINGS

Figure 9 Main components, 225-300kVA Liebert NX UPS, SMS and 1+N multi-module unit with static bypass

Control LCD

Main Input
Circuit Breaker
(CB1), optional

Backfeed Circuit
Breaker (BFB)

External
Communication
Panel, See Detail A

Bypass Busbars
Ø, A, B, C

Rectifier Input
Busbars Ø, A, B, C

Front Doors Removed

X3

X6

XT1/2

XT3/8

TB2

X19A

X20

XT2

(Non-Functional)

TB3

(See specific control wiring drawings)

XS3

XS6 (LIFE)

X9

XT4

TB1

X19B

XT1
(Non-Functional)

XB4

Detail A

External Communication Panel

Output Busbars
Ø, A, B, C

Input Ground
Busbar

Battery
Busbars (+ /-)

Doors and Inner Skins Removed

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 25

U38-3C-2000
Rev. 2

Figure 10 Outline drawing, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

NOTES

1. All dimensions are in inches (mm).

2. 24" (610) minimum clearance above unit required for air exhaust and 36" (914) front access
required for service.

3. Keep cabinet within 15 degrees of vertical.

4. Top and bottom cable entry available through removable access plates. Remove, punch to suit
cable entry size and replace.

5. Unit bottom is structurally adequate for forklift handling.

6. Control wiring and power wiring must be run in separate cable entry.

7. All wiring is to be in accordance with national and local electrical codes.

8. Depth dimension includes front door and rear panel.

9. Width dimensions include side panels.

10. See technical data drawing for shipping weights.

11. The height is to the top of the frame; fans rise 1.5" (38.1mm) above the frame.

76.8"

(1950mm)

See Note 12

FRONT

FRONT

FRONT VIEW

RIGHT SIDE VIEW

BOTTOM VIEW

Cable
Entry

12.8" (325mm)

23.1"

(586mm)

57.1"

(1450mm)

33.7"

(856mm)

53.4" (1357mm)

Center of

Gravity, Typ.

for Front

40.6" (1032mm)

20.2" (513mm)
Center of

Gravity

24.6" (616mm)
Center of

Gravity

1.1" (28mm) to Panel

1.1" (28mm)
to Panel

4.1"

(104mm)

to Panel

To Panel

6.5" (165mm)

To Panel

3.9" (99mm)

Conduit Plate

Low Voltage
Conduit Plate

3.8" x 12.7" (97 x 323) )

Power Conduit Plate

18.3" x 12.7"
(465 x 323)

U38-3C-2001
Rev. 4

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 26

Figure 11 225-300kVA low-voltage cable routing

Low-Voltage
Top Entry

Top Entry,
Low-Voltage
Cable Raceway

Doors and

Inner Skins

Removed

NOTE

Remove the low-voltage control wire plate (at the top of the unit and then expose the area by removing the
inside cover plate), punch the conduit holes, land the conduit, and then route the control wire to the “chimney
stack” toward the bottom of the unit.

Run the control wires to through the conduit plate provided. If the unit is not on a raised floor, then insert a
rubber grommet into the conduit plate hole (at the bottom of the entry location for the low-voltage control
wiring).

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 27

Low-Voltage
Bottom Entry

Figure 12 Base Drawing, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

Front

2.2" x 2"
(56mm x 50mm)
Pad, Typ. 4
Corners

11.5"

(291mm)

21.3"

(541mm)

13.8"

(350mm)

1.1" x 2"
(28mm x 50mm)
Pad, Typ. 2 places

11.6"

(296mm)

21.5"

(546mm)

15.6" x 1.1"
(397 x (27mm)
Pad

See
Detail A

BOTTOM VIEW

FOOTPRINT SPACING

Top View

11.5"

(291mm)

0.4"
[11]

Door

0.1" (2mm)
Pad to Outside
End Panel

1.1" (27mm)
Pad to Outside
Door Panel

DETAIL A

Pad

Pad

FRONT VIEW

WITHOUT KICKPLATE

2.2"

(56mm)

53.1"

(1350mm)

48.7"

(1238mm)

31.5"

(800mm)

27.6"

(700mm)

1.8"
(47mm)

Unit bottom is structurally adequate
for forklift handling front or rear only.

4.1"
(103mm)
Leg

1.7"
(42mm)

RIGHT ISOMETRIC VIEW

WITHOUT KICKPLATE

Rail

1.3"
(34mm)

Pad Dia. Centers

Pad

Pad

Ø 0.4"

(11mm)

Ø 0.3"

(8mm)

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 28

Figure 13 Terminal details, 225-300kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

NOTE
See individual bus
detail drawings.

Front

ØA Bypass
Input

ØB Bypass
Input

ØC Bypass Input

ØC Input

ØB Input

ØA Input

Ground

FRONT

LEFT SIDE VIEW

ØA Output

See Bus Dwg 356
ØB Output
See Bus
Dwg 372

ØC Output
See Bus
Dwg 356

See Bus
Dwg 356

Ground
See Bus
Dwg 349

Batt Customer
Busbar See Bus
Dwg 370

See Bus
Dwg 372

Ø

0.6"

(15mm)

3.1" (78.7mm) Typ.

4.8"

(122mm)

NOTE
See individual bus detail drawings .

1.18" (30mm) Typ.

0.59" (15mm)
Typ.

Connection Busbar

0.63" (16mm)

Battery Busbar

0.87" (22mm)

1.75" (44.5mm)

1.97"

(50mm)

0.98" (25mm)

Input, Bypass,
Output Busbar

1.75" (44.5mm)

1.75" (44.5mm)

1.97"

(50mm)

0.98"

(25mm)

Figure 14 Terminal details Liebert NX 225kVA - 300kVA UPS 1+N multi-module or SMS

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 29

Figure 15 Main components, 400-600kVA Liebert NX UPS, SMS and 1+N multi-module unit with static bypass

Control LCD

Main Input
Circuit Breaker
(CB1), optional

Backfeed Circuit
Breaker (BFB)

External
Communication
Panel, See
Detail A

Bypass Busbars
Ø, A, B, C

Rectifier Input
Busbars Ø, A, B, C

Output
Busbars
Ø, A, B, C

Battery
Busbars (+ /-)

Input Ground
Busbar

Front Doors Removed

Doors and Inner Skins Removed

TB1

XT2

XT1
(Non-Functional)

TB3

TB4

X20

X19B

TB2

XT4

XT3/8

X9
XT1/2
X6

X3

XS3

XS6 (LIFE)

(Non-Functional)

X19A

Detail A

External Communication Panel

(See specific control

wiring drawings)

U38-6C-2000
Rev. 2

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 30

Figure 16 Outline drawing, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

6.5" (165mm)
to Panel

(844mm)
Power Conduit
Opening without Panel

24.5" x 15.5"
(622mm x 394mm)

90.7" (2304mm)

31.6"

(802mm)

1.1" (28mm) to Panel

VENT

33.2"

Low Voltage Conduit
Plate to Panel

1.3" (33mm)

Low Voltage
Conduit Plate

2.8" x 11.7"
(71mm x 297mm)

59.1" (1502mm)

Power Conduit
Opening without Panel

24.5" x 15.5"
(622mm x 394mm)

VENT

33.7"

(856mm)

34.7"

(881mm)

FRONT

Low Voltage
Conduit Plate

2.9" x 10.9"
(71mm x 276mm)

FRONT VIEW

1. All dimensions are in inches (mm).

2. 24" (610mm) minimum clearance above
unit required for air exhaust and 36" (914mm)
front access required for service.

3. Keep cabinet within 15 degrees of vertical.

4. Top and bottom cable entry available through removable
access plates. Remove, punch to suit cable entry size
and replace.

5. Unit bottom is structurally adequate for forklift handling.

6. Control wiring and power wiring must be run
in separate cable entry.

7. All wiring is to be in accordance with national
and local electrical codes.

8. Depth dimension includes front door and rear panel.

10. Width dimensions include side panels.

11. See technical data drawing for shipping weights.

11. The height is to the top of the frame; fans rise

1.5" (38.mm) above the frame.

40.2" (1022mm)

Center of Gravity

2.4"

(62mm)

FRONT

Center of Gravity

Typ. for Front

36.8" (935mm)

19.3" (489mm)
Center of

Gravity

U38-6C-2001
Rev. 5

BOTTOM VIEW

33.7"

(856mm)

29.8"

(756mm)

(38mm)

(1950mm)

See Note 12

RIGHT SIDE VIEW

1.5"

76.8"

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 31

Figure 17 Base Drawing, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

BOTTOM VIEW

FOOTPRINT SPACING

Top View

Door

Pad

FRONT VIEW

WITHOUT KICKPLATE

Unit bottom is structurally adequate
for forklift handling front or rear only

RIGHT ISOMETRIC VIEW

WITHOUT KICKPLATE

4.1"
(103mm)
Leg

1.7"
(42mm)

Pad

Pad

2.2"

(56mm)

2.2" x 2"

(56mm x 50mm)

Pad, Typ.

Opposite Side

4.4" x 2"

(112mm x 50mm)

Pad, Typ.

Opposite Side

2.2" x 2"
(56mm x 50mm)
Pad, Typ.
4 Corners

23.5" x 1.1"
(597mm x 27mm)
Pad

1.1" (27mm)
Pad to Outside
Door Panel

0.1" (2mm)

Pad to Outside

End Panel

86.1"

(2188mm)

90.6" (2300mm)

Rail

See Detail A

FRONT

21.5" x .5"
(547mm x 13mm)
Pad

1.1" x 2"
(28mm x 50mm)
Pad, Typ. 2 Places

10.5"

(266mm)

10.7"

(271mm)

1.3"

(34mm)

14.4"

(366mm)

Ø 0.4"

(11mm)

Ø 0.4"
(11mm)
Typ.

Ø 0.3"
(8mm)

0.6" (15mm)

10.5"

(266mm)

20.5"

(521mm)

20.3"

(516mm)

14.4"

(366mm)

27.6"

(700mm)

31.5"

(800mm)

3" (76mm)

DETAIL A

Pad Dia. Centers

Pad

U38-6L-1000
Rev. 0

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 32

Figure 18 Terminal details, 400-600kVA Liebert NX, SMS and 1+N multi-module unit with static bypass

Battery
Customer
Busbar

FRONT

Ground

ØB
Output

ØC
Output

ØA
Output

ØA
Input

ØB
Input

ØC
Input

ØC
Bypass
Input

ØB
Bypass Input

ØA
Bypass Input

FRONT

78.3"

[1990mm]

12.9"

(326mm)

LEFT SIDE VIEW

3.1"v
(80mm) Typ.

25.8"

(656mm)

32.1"

(814mm)

38.3"

(972mm)

44.5"

(1130mm)

50.7"

(1288mm)

57"

(1448mm)

4.7" (120mm)

90.7"

[2304]

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 33

Figure 19 Terminal details Liebert NX 400kVA - 600kVA UPS 1+N multi-module or SMS

0.7"

(18mm)

1.8"

(44.5mm)

1.4"

(35mm)

3.2"

(80.3mm)

1.8"

(44.5mm)

1"

(25mm)

6.8" (173mm)

2"

(50mm)

(15mm) Typ.

INPUT, BYPASS,

OUTPUT BUSBAR

3.1"

80mm)

Ø 0.6"

Ø 0.6"

(15mm)

Typ.

18.1"

(460mm)

GROUND CONNECTION BUSBAR

1.8"

(44.5mm)

1"

(25mm)

9.2" (233mm)

2"

(50mm)

BATTERY BUSBAR

3.1"

80mm)

Ø 0.6"

(15mm) Typ.

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 34

Figure 20 Recommended control wiring for Liebert NX 225-600kVA single module, Eco Mode

NX225-600kVA SMS

Contact closes when
UPS is on bypass

TB4-2 TB4-3

TB1-7

TB3-6 TB3-5

TB1-8

TB3-7

SKRU Status

(To SKRU 842, 840, 841)

(To SKRU 844, 843)

NO

2PDT SW

841

840

842

843844

821

823824

820

822

Solenoid Key Release
Unit (Auxiliary switch
shown in position with
key installed)

6

L

X

X

X

Maintenance

Bypass Source

MBB

MIB

Critical

Load

MAINTENANCE

BYPASS SWITCHBOARD

UPS
System
Source

ECO Mode

Enabled (On) Disabled (Off)

1. Key release unit with associated
controls and locking devices
supplied by switchboard provider.

2. Switchboard/gear manufacturer to
provide all wires, pins, sockets,
connectors and proper designation as shown.

3. All wiring to be UL/CSA approved.

4. Wire gauge to be #16 AWG minimum
except where noted.

5. All designated terminal blocks to
be accessible from the front of switchgear.

6. SKRU to be equipped with a two-pole,
double-throw (4P/DT) auxiliary switch.

7. 4PDT switch must be rated at 120VAC.

8. Switch position shown is for Eco-Mode disabled

U3826012
Rev. 0

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 35

Figure 21 Recommended control wiring for Liebert NX 225-600kVA multi-module, Eco Mode

Liebert NX 1+N #2

Contact closes when
UPS is on bypass

Contact closes when
UPS is on bypass

TB4-2

TB4-3

TB4-2 TB4-3

TB1-7TB3-6 TB3-5 TB1-8TB3-7TB1-7TB3-6 TB3-5 TB1-8TB3-7

SKRU Status

SKRU Status

(To SKRU 842, 840, 841)

(To SKRU 822, 820, 821)

(To SKRU 844, 843)

(To SKRU 844, 843)

NO

NO

4PDT SW

841

840

842

843844 821823824

820

822

Solenoid Key Release
Unit (Auxiliary switch
shown in position with
key installed)

6

L

X

XX

Maintenance

Bypass Source

MBB

MIB

Critical

Load

MAINTENANCE

BYPASS SWITCHBOARD

UPS

System

Source

ECO Mode

Enabled (On) Disabled (Off)

1. Key release unit with associated
controls and locking devices
supplied by switchboard provider.

2. Switchboard/gear manufacturer to
provide all wires, pins, sockets,
connectors and proper designation as shown.

3. All wiring to be UL/CSA approved.

4. Wire gauge to be #16 AWG minimum
except where noted.

5. All designated terminal blocks to
be accessible from the front of switchgear.

6. SKRU to be equipped with a four-pole,
double-throw (4P/DT) auxiliary switch.

7. 4PDT switch must be rated at 120VAC.

8. Switch position shown is for ECO-Mode
disabled.

U3826011
Rev. 0

Liebert NX 1+N #1

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 36

5.0 SPECIFICATIONS

Table 7 Liebert NX UPS specifications

Model Size

Input Parameters

Input Voltage to Rectifier, VAC 480V 3-phase, 3-wire

Input Voltage to Bypass, VAC 480V 3-phase, 3-wire

Input Voltage Range, VAC

Input Frequency, Hz 60

Permissible Input Frequency Range, Hz 55 to 65

Reflected Input THDi, Nominal Voltage, Full Load, % <5%

Power Walk-In, sec

Battery and DC Parameters

Battery Type VRLA (Valve Regulated Lead Acid) or FLA (Flooded Lead Acid)

Nominal Battery Bus, VDC 480V

Battery Float Voltage, VDC 540V

Minimum End of Discharge Voltage, VDC 396V (for VRLA / FLA)

DC Ripple Voltage in Float & Const V Ch. Mode, % <1 (RMS value) < 3.4% Vpp

Temperature Compensated Battery Charging Optional (with temperature probe)

Output Parameters

Inverter Type IGBT-based Sine-Sine PWM Controlled

Output Power, kW 225 250 300 400 500 600

Output Voltage, VAC 480V 3-ph, 3-wire

Output Voltage Regulation, % < 1% (3-phase RMS average)

Output Voltage Regulation (100% Unb. Load) < 2% (3-phase RMS average)

Output Frequency, Hz 60

Output Frequency Regulation

Output THDv Linear Load at Nominal Voltage, % <2

Output THDv at Nominal Voltage Including a 100kVA Non

Linear Load per EN 62040-3, %

Capacity to Handle High Crest Factor Load 3:1

Unbalance Loads Current Capacity 100% of nominal phase current

Physical Parameters and Standards, in (mm)

Width, With Static Bypass 53.4 (1356) 90.7 (2304)

Depth 33.7 (856)

Height 78.6 (1996)

Weight, Unpackaged, approximate, lb. (kg) 2,450 (1,110) 4450 (2019)

Maximum Heat Dissipation, Full Load, BTU/hr 41,000 45,000 54,000 72,000 90,000 108,000

Color Black (ZP-7021)

Front Door Opening (for serviceability) More than 90°

Degree of Protection for UPS Enclosure IP 20 (with and without front door open)

Minimum Clearance, Top, in (mm) 24 (610)

UPS Rating, kVA

225 250 300 400 500 600

+10% to -30%
(The UPS will operate at voltages down to -12.5% of nominal at 100% load
without discharging the battery. The UPS will operate without discharging the
battery at 70% of full nominal load with voltage down to -30% of nominal.)

1 to 90 (selectable) in 1 sec. Increments
(Walk-in begins after a 7-second source qualification time. Special settings
are available to permit shorter walk-in times for use with flywheels. Consult
factory for details.)

Synchronized to bypass: ±1.2 Hz (1.2Hz default setting, adjustable up to ±

3.6Hz by factory service personnel)
Synchronized to internal clock ±0.06Hz

2.5% (max)

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 37

Table 7 Liebert NX UPS specifications (continued)

Model Size

Minimum Clearance, Back, in (mm) 0

Minimum Clearance, Sides, in (mm) 0

Location of Cable Entrance Top or Bottom

Standards and Conformities

Environmental Parameters

Storage Temperature Range, °F (°C) -13 to 158 (-25 to 70)

Operating Temperature Range, °F (°C) 32 to 104 (0 to 40) (UPS)

Relative Humidity 95% or less Non-Condensing (Operating and Non-Operating)

Table 8 UPS rating at altitude

UPS Rating, kW

Rating

vs.

Altitude

Altitude

up to 3300ft. (1000m) 225 250 300 400 500 600

up to 4921ft. (1500m) 225 250 270 400 500 540

up to 6562ft. (2000m) 225 250 252 400 500 504

up to 9842ft. (3000m) 225 225 225 400 450 450

225 250 300 400 500 600

UPS Rating, kVA

225 250 300 400 500 600

UL 1778, 5th Ed.

CSA 22.2 No. 107.3-14, 3rd Ed.

FCC Part 15, Class A

IEC62040-2, Level 4, Criteria A

EN61000-4-3, Level 3, Criteria A

EN61000-4-6, Level 4, Criteria A

EN61000-2-2, Criteria A

EN61000-4-4, Level 4, Criteria A

ANSI C62.41, Category A3 & B3

ISTA Procedure 1H

WEEE

Table 9 Current ratings—rectifier input

UPS Rating

225 225 480 285 299

250 250 480 317 332

300 300 480 380 399

400 400 480 505 530

500 500 480 632 663

600 600 480 761 799

Voltage

VAC

Nominal

Current

Maximum

Current kVA kW

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 38

Table 10 Current ratings—bypass

UPS Rating

kVA/kW Voltage, VAC Nominal Current

225 480 271

250 480 301

300 480 361

400 480 481

500 480 601

600 480 722

Table 11 Current ratings—output

UPS Rating

kVA/kW Voltage, VAC Nominal Current

225 480 271

250 480 301

300 480 361

400 480 481

500 480 601

600 480 722

Table 12 Current ratings—battery

UPS Rating

kVA/kW Nominal VDC

225 480 600

250 480 667

300 480 800

400 480 1068

500 480 1335

600 480 1600

Maximum

Battery Current

Notes on Tables

1. Nominal input current (considered continuous) is based on full-rated output load. Maximum current includes nominal
input current and maximum battery recharge current (considered non-continuous). Continuous and non-continuous
current are defined in NEC 100.

2. For breaker coordination while the module is overloaded, see the current-versus-time values on the overload curves.

3. Nominal battery voltage is shown at 2.0 volts/cell.

4. Maximum Battery current at End of Discharge level of 1.65 volts per cell.

5. External DC Circuit Overcurrent Protective Device—Caution: To reduce the risk of fire, connect only to a circuit with the
maximum branch circuit overcurrent protection recommended in Tab le 1 3 in accordance with the National Electric Code,
ANSI/NFPA 70.

Table 13 Recommended DC circuit breaker rating

UPS Rating

kVA/kW

225 600

250 700

300 800

400 1200

500 1600

600 1600

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 39

Circuit Breaker

Rating, A

Table 14 Current-versus-time curves of overload capacity

Overload Time, sec. (min.)

Load, %

101 8249.9 (137.5) 10,999.8 (183.3) 13,749.8 (229.2) 16,499.7 (275) 16,499.7 (275)

105 1650.0 (27.5) 2200.0 (36.7) 2750.0 (45.8) 3299.9 (55) 3299.9 (55)

110 825.0 (13.75) 1100.0 (18.3) 1375.0 (22.9) 1650.0 (27.5) 1650.0 (27.5)

115 550.0 (9.2) 733.3 (12.2) 916.7 (15.3) 1100.0 (18.3) 1100.0 (18.3)

120 412.5 (6.9) 550.0 (9.2) 687.5 (11.5) 825.0 (13.8) 825.0 (13.8)

125 319.4 (5.3) 425.9 (7) 532.4 (8.9) 638.9 (10.6) 638.9 (10.6)

130 222.2 (3.7) 296.3 (4.9) 370.3 (6.2) 444.4 (74) 444.4 (74)

135 152.7 (2.5) 203.6 (3.4) 254.6 (4.2) 305.5 (5) 305.5 (5)

140 100.6 (1.7) 134.2 (2.2) 167.7 (2.8) 201.3 (3.4) 201.3 (3.4)

145 36.7 (—) 48.9 (—) 61.1 (1.0) 73.3 (1.2) 73.3 (1.2)

150 27.7 (—) 37.0 (—) 46.2 (—) 55.4 (—) 55.4 (—)

155 7.3 (—) 9.7 (—) 12.1 (—) 14.6 (—) 14.6 (—)

160 7.3 (—) 9.7 (—) 12.1 (—) 14.5 (—) 14.5 (—)

165 7.3 (—) 9.7 (—) 12.1 (—) 14.5 (—) 14.5 (—)

The inverter overload is based on 104°F (40°C) ambient. At lower ambient temperatures, the overload timers automatically adjust to
longer run times.

104°F (40°C) 95°F (35°C) 86°F (30°C) 77°F (25°C) 60°F (20°C)

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 40

Table 15 Recommended conduit and cable sizes

Rectifier Input

UPS Rating

kVA kW Copper Conductors Aluminum Conductors

225 225 480 (1) 2.5C 3-500kcmil, #4AWG (1) 2.5C 3-700kcmil, #2AWG

250 250 480 (1) 3.0C 3-600kcmil, #3AWG (2) 2.0C 3-300kcmil, #1AWG

300 300 480 (2) 2.0C 3-250kcmil, #3AWG (2) 2.0C 3-350kcmil, #1AWG

400 400 480 (2) 2.5C 3-500kcmil, #1AWG (2) 2.5C 3-600kcmil, #2/0AWG

500 500 480 (2) 3.0C 3-600kcmil, #1/0AWG (3) 2.5C 3-500kcmil, #3/0AWG

600 600 480 (3) 2.5C 3-500kcmil, #1/0AWG (3) 2.5C 3-600kcmil, #3/0AWG

Bypass Input

UPS Rating

kVA kW Copper Conductors Aluminum Conductors

225 225 480 (1) 2.5C 3-500kcmil, #4AWG (1) 2.5C 3-600kcmil, #2AWG

250 250 480 (1) 2.5C 3-500kcmil,#3AWG (1) 3.0C 3-750kcmil, #1AWG

300 300 480 (2) 1.5C 3-#4/0AWG, #3AWG (2) 2.0C 3-300kcmil, #1AWG

400 400 480 (2) 2.0C 3-350kcmil, #2AWG (2) 2.5C 3-500kcmil, #1/0AWG

500 500 480 (2) 2.5C 3-500kcmil, #1/0AWG (2) 3.0C 3-750kcmil, #3/0AWG

600 600 480 (2) 3.0C 3-750kcmil, #1/0AWG (3) 2.5C 3-500kcmil, #3/0AWG

Vol tage

(VAC)

Vol tage

(VAC)

(# of conduits); size of conduits; # -size of phase cables per conduit; size of cable

for ground per conduit

(# of conduits); size of conduits; # -size of phase cables per conduit;

size of cable for ground per conduit

Output

UPS Rating

kVA kW Copper Conductors Aluminum Conductors

225 225 480 (1) 2.5C 3-500kcmil, #4AWG (1) 2.5C 3-600kcmil, #2AWG

250 250 480 (1) 2.5C 3-500kcmil,#3AWG (1) 3.0C 3-750kcmil, #1AWG

300 300 480 (2) 1.5C 3-#4/0AWG, #3AWG (2) 2.0C 3-300kcmil, #1AWG

400 400 480 (2) 2.0C 3-350kcmil, #2AWG (2) 2.5C 3-500kcmil, #1/0AWG

500 500 480 (2) 2.5C 3-500kcmil, #1AWG (2) 3.0C 3-750kcmil, #3/0AWG

600 600 480 (2) 3.0C 3-750kcmil, #1AWG (3) 2.5C 3-500kcmil, #3/0AWG

Battery (Copper Conductors Only for Battery)

UPS Rating

kVA kW

225 225 480 (2) 2C 2-500kcmil, #1/0AWG

250 250 480 (2) 2C 2-600kcmil, #1/0AWG

300 300 480 (2) 2.5C, 2-600kcmil, #2/0AWG

400 400 480 (3) 2.5C, 2-600kcmil, #3/0AWG

500 500 480 (3) 2.5C, 2-750kcmil, #4/0AWG

600 600 480 (5) 2.5C, 2-600kcmil; 250kcmil

1. Recommended cable sizes are 167°F (75°C) (THW) wire at 86°F (30°C) ambient.

2. For continuous operations not at 86°F (30°C), Vertiv recommend that the site planner choose the appropriate cable type based on the particular installation
requirements.

3. Recommended conduit is based on FMC type conduit.

Vol tage

(VAC)

Vol tage

(VAC)

(# of conduits); size of conduits; # -size of phase cables per conduit;

size of cable for ground per conduit

(# of conduits); size of conduits; # -size of phase cables per conduit;

size of cable for ground per conduit

Copper Conductors

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 41

Table 16 Recommended lug sizes

Cable Size

#8AWG 54930BE 54850BE 60104-TB —

#6AWG 54905BE 256-30695-868 60109-TB —

#4AWG 54906BE 256-30695-733 60114-TB —

#2-3AWG 54942BE 54811BE 60120 —

#1AWG 54947BE 54857BE 60126 —

#1/0AWG 54950BE 256-30695-593 60132 —

#2/0AWG 54951BE 54862BE 60138 60238

#3/0AWG 54965BE 54864BE 60144 60244

#4/0AWG 54970BE 54866BE 60150 60250

250kcmil 54913BE 54868BE 60156 60256

300kcmil 54914BE 54870BE 60162 60262

350kcmil 54915BE 54872BE 60165 60267

400kcmil 54916BE 54874BE 60168 60269

500kcmil 54918BE 54876BE 60171 60273

600kcmil 54920BE 54878BE 60176 60275

750kcmil 54922BE 54880BE 60178 60277

One Hole

T&B Copper

T&B Copper

Two Hole

T&B Aluminum

One Hole

T&B Aluminum

Two Hole

Table 17 Recommended torque values

Grade 5 Steel: Unified Thread System Torque, lbf.*in. Class 8.8 Steel: Metric Thread System Torque, N*m

Fastener Finish Plain Steel Zinc Plating Fastener Finish Plain Steel Zinc Plating

Size

1/4

5/16

3/8

7/1 6

1/2

9/16

Threads/

Inch, Tpi

20 101 91

28 116 104 0.5 6.9 6.2

18 209 188

24 231 208 0.75 11 10

16 370 333

24 420 378 1 27 24

14 593 534

20 662 596 1.25 53 47

13 904 814

20 1020 918 1.25 95 86

12 1305 1175

18 1456 1310 1.5 151 136

No Washer/

Flat Washer

No Washer/
Flat Washer Size

M5

M6

M8

M10

M12

M14

Thread

Pitch, Tp

0.8 6.1 5.5

110 9

1.25 25 23

1.5 50 45

1.75 87 78

2139 125

No Washer/
Flat Washer

No Washer/

Flat Washer

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 42

Table 18 Components required for seismic configuration meeting OSHPD regulations

Part # Description

NXOSH300 OSHPD Floor Anchor NX 300 kVA UPS Module

NXOSH600 OSHPD Floor Anchor NX 600 kVA Module

NXOSHFTBC OSHPD Floor Anchor NX Front Terminal Battery Cabinet

NXOSHTTBC OSHPD Floor Anchor NX Top Terminal Battery Cabinet

NXOSHNJC OSHPD Floor Anchor NX Top Terminal Battery 393mm Junction Cabinet

NXOSHPJC OSHPD Floor Anchor NX Front Terminal Battery 393mm Junction Cabinet

NXOSHWJC OSHPD Floor NX 785mm Junction Cabinet

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 43

Notes

Vertiv™| Liebert® NX™ 225-600kVA Installation Manual | Rev. 8 | 07/2017 44

TECHNICAL SUPPORT / SERVICE

Web Site

www.vertivco.com

Monitoring

[email protected]

800-222-5877

Outside North America: +00800 1155 4499

Three-Phase UPS & Power Systems

800-543-2378

Outside North America: 614-841-6598

LOCATIONS

United States

1050 Dearborn Drive

P.O. Box 2 9 1 86

Columbus, OH 43229

Europe

Via Leonardo Da Vinci 8

Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

[phone]

Fax: [phone]

Asia

29/F, The Orient Square Building

F. Ortigas Jr. Road, Ortigas Center

Pasig City 1605

Philippines

[phone]

Fax: [phone]

©2017 Vertiv Co. All rights reserved throughout the world

Verti vC o.co m | Ver ti v Hea dqua rt er s

Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names,
trademarks or registered trademarks of their respective owners.

While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co. assumes no responsibility, and disclaims all
liability, for damages resulting from use of this information or for any errors or omissions. Specifications are subject to change without notice.

This document may contain confidential and/or proprietary information of Liebert Corporation, and its receipt or possession does not convey
any right to reproduce, disclose its contents, or to manufacture or sell anything that it may describe. Reproduction, disclosure, or use without
specific authorization from Liebert Corporation is strictly prohibited.

SL-25353_REV8_07-17

, 1050 Dearborn Drive, Columbus, OH, 43085, USA