Liebert PDUTM, STS2 User Manual

STS2/PDU™

POWER DISTRIBUTION

INSTALLATION, OPERATION & MAINTENANCE MANUAL

250A - 800A

Three Phase

60 Hz

CONTACTING LIEBERT FOR SUPPORT

To contact Liebert Global Services for information or repair service in the United States, call 1-800-LIEBERT (1-800-543-2378). Liebert Global Services offers a complete range of start-up services, repair services, preventive maintenance plans and service contracts.

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

For Liebert Global 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: ______________________________________________________

TABLE OF CONTENTS

CONTACTING LIEBERT FOR SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER

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

1.0 UNPACKING AND INSPECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.1 External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Unloading and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2.1 Handling Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2.2 Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Internal Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.0 LOCATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1 Recommended Minimum Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Heat Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.0 LOCATING THE STS2/PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.1 Anchoring the Unit to the Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Leveling of the 250A Only STS2/PDU Without Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.0 POWER AND CONTROL WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4.1 Input and Output Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 System Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.3 Control Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.4 Remote Source Selection Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.0 OUTPUT POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

5.1 Customer Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

6.1 Programmable Relay Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.2 Input Contact Isolator Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3 Comms Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.4 Internal Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.5 Network Interface Card (NIC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.6 Remote Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.7 Key Lockout Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.8 Static Switch Redundant Output Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.9 Inline Panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.10 I-Line Panelboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.11 Subfeed Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.12 K-Factor Transformers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.13 Surge Suppression System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

8.0 INTRODUCTION TO STS2/PDU OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

8.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.1.1 Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.1.2 Reliability and Agency Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.1.3 Factory Backup and Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.2 Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.2.1 Normal (Preferred Source) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.2.2 Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.2.3 Transfer Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.2.4 Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.3 Operator Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.0 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

9.1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1.1 Static Transfer Switch 2 Power Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1.2 Source Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1.3 Automatic Transfer/Retransfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1.4 Emergency Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1.5 Load Current Transfer Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1.6 SCR Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1.7 On/Off Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.2 Detailed Component Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.2.1 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.2.2 Circuit Breakers and Non-Automatic Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2.3 SCRs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2.4 Logic Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2.5 Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2.6 RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

10.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

10.1 Normal System Turn-On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10.2 Manual Transfer / Preferred Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.3 Enabling Remote Source Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

10.4 Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

10.4.1 Bypass Procedures for Source 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

10.4.2 Bypass Procedures for Source 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

10.5 Normal System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

10.5.1 Shutdown in Static Transfer Switch Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

10.5.2 Shutdown in Maintenance Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

11.0 ALARMS AND FAULTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

11.1 Event Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

11.2 Event and History Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

11.2.1 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

11.2.2 History Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

11.3 Alarm Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

11.4 List of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

12.0 COMMUNICATION INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

12.1 Using the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12.1.1 Connecting and Using a Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12.1.2 Configuring the STS2/PDU via the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

12.1.3 Setting Bitpacked Options With the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

12.1.4 Setting Event Masks with the Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

13.0 TOUCH SCREEN DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

13.1 Display Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

13.2 Menu Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

13.2.1 Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

13.3 Mimic Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

13.4 Event Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

13.5 Event Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

13.6 Menu Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

13.7 Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

13.7.1 Logs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

13.7.2 Source Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13.7.3 Startup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13.7.4 Bypass Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13.7.5 Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13.7.6 Logo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13.8 Cleaning the LCD Touch Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

14.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1 System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.1 Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.2 Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.3 Output Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.4 System Current Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.5 Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

14.1.6 Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

14.1.7 Surge Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

14.1.8 Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

14.1.9 Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

14.2 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

14.2.1 Frame and Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

14.2.2 Caster and Leveling - 250A only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

14.2.3 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

14.2.4 Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

14.2.5 Circuit Breakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

14.2.6 Cable Entrance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

14.2.7 Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

14.2.8 Color Graphical Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

14.2.9 RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

14.2.10 Terminal Port Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

14.2.11 RS-232 Interface Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

14.2.12 Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

14.2.13 Fuseless Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

14.2.14 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

iii

15.0 EVENT MESSAGE HELP TEXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

16.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

16.1 Proper Tightening of Nuts and Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

16.2 Testing the STS2/PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

16.3 Changing the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

17.0 CUSTOMER SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

17.1 Programmable Relay Board Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

17.2 Input Contact Isolator Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

FIGURES

Figure 1 Recommended derating for high altitude operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 2 Maximum ambient temperature for full load operation at higher altitudes . . . . . . . . . . . . . . . . . . 6

Figure 3 Typical STS2/PDU, one-line diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 4 Typical STS2/PDU, one-line diagram, with dual static switch output circuit breakers

(not available on 250A units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 5 Typical STS2/PDU, one-line diagram, with inline distribution, dual static switch output

circuit breakers10

Figure 6 Typical STS2/PDU, one-line diagram, with I-Line distribution, dual static switch output circuit

breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 7 Outline drawing, 250A STS2/PDU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 8 Outline drawing, 250A STS2/PDU with right side I-Line distribution . . . . . . . . . . . . . . . . . . . . . 18

Figure 9 Outline drawing, 250A STS2/PDU with right side inline distribution . . . . . . . . . . . . . . . . . . . . . 19

Figure 10 Outline drawing, 250A STS2/PDU with left side I-Line distribution . . . . . . . . . . . . . . . . . . . . . . 20

Figure 11 Outline drawing, 250A STS2/PDU with left side Inline distribution . . . . . . . . . . . . . . . . . . . . . . 21

Figure 12 Outline drawing,400-600A STS2/PDU with right side inline distribution . . . . . . . . . . . . . . . . . . 22

Figure 13 Outline drawing, 400-600A STS2/PDU with right side output breaker or I-Line distribution . . 23

Figure 14 Outline drawing, 400-600A STS2/PDU with left side inline distribution . . . . . . . . . . . . . . . . . . . 24

Figure 15 Outline drawing, 400-600A STS2/PDU with left side output breaker or I-Line distribution . . . 25

Figure 16 Outline drawing, 800A STS2/PDU with right side output breaker or I-Line distribution. . . . . . 26

Figure 17 Outline drawing, 800A STS2/PDU with right side inline distribution . . . . . . . . . . . . . . . . . . . . . 27

Figure 18 Outline drawing, 800A STS2/PDU with left side output breaker or I-Line distribution . . . . . . . 28

Figure 19 Outline drawing, 800A STS2/PDU with left side inline distribution. . . . . . . . . . . . . . . . . . . . . . . 29

Figure 20 Outline drawing, 250A STS2/PDU with key lockout switch option . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 21 Outline drawing, 400-600A STS2/PDU, inline distribution, right side with key lockout

switch option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 22 Outline drawing, 800A STS2/PDU, inline distribution, right side with key lockout switch

option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 23 Electrical field connections, 250A STS2/PDU input/output with CB8. . . . . . . . . . . . . . . . . . . . . . 33

Figure 24 Electrical field connections, 250A STS2/PDU input with CB3. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 25 Electrical field connections, 250A STS2/PDU input with CB3 & CB3A . . . . . . . . . . . . . . . . . . . . 35

Figure 26 Electrical field connections, 400-600A STS2/PDU input with CB3 . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 27 Electrical field connections, 400-600A STS2/PDU input with CB3 and CB3A . . . . . . . . . . . . . . . 37

Figure 28 Electrical field connections, 800A STS2/PDU input with CB3. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 29 Electrical field connections, 800A STS2/PDU input with CB3 and CB3A. . . . . . . . . . . . . . . . . . . 39

Figure 30 Electrical field connections, 250A STS2/PDU output with inline panelboards. . . . . . . . . . . . . . . 40

Figure 31 Electrical field connections, 400-800A STS2/PDU output with inline panelboards . . . . . . . . . . . 41

Figure 32 Electrical field connections, STS2/PDU output with I-Line panelboard . . . . . . . . . . . . . . . . . . . . 42

Figure 33 Electrical field connections, 400-600A STS2/PDU with right side output breaker. . . . . . . . . . . . 43

Figure 34 Electrical field connections, 400-600A STS2/PDU with left side output breaker . . . . . . . . . . . . . 44

Figure 35 Electrical field connections, 800A STS2/PDU with right side output breaker . . . . . . . . . . . . . . . 45

Figure 36 Electrical field connections, 8600A STS2/PDU with left side output breaker. . . . . . . . . . . . . . . . 46

Figure 37 Electrical field connections, 800A STS2/PDU interconnect wiring . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 38 Electrical field connections, 800A STS2/PDU interconnect wiring, breaker section . . . . . . . . . . 48

Figure 39 Electrical field connections, 800A STS2/PDU interconnect wiring, STS section . . . . . . . . . . . . . 49

Figure 40 Electrical field connections, 800A STS2/PDU interconnect wiring, left side distribution

cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 41 Electrical field connections, 800A STS2/PDU interconnect wiring, left side one-line . . . . . . . . . 51

Figure 42 Electrical field connections, 800A STS2/PDU interconnect wiring, left side one line

with CB3A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 43 Electrical field connections, 800A STS2/PDU interconnect wiring, right side one line . . . . . . . . 53

Figure 44 Electrical field connections, 800A STS2/PDU interconnect wiring, right side one line

with CB3A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 45 Control wiring, 800A STS2/PDU, left side distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 46 Control wiring, 800A STS2/PDU, right side distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 47 Control connection location, 250A STS2/PDU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 48 Control connection location, 400-800A STS2/PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 49 Control location drawing conduit box, top entry, 400-600A STS2/PDU . . . . . . . . . . . . . . . . . . . . 59

Figure 50 Control wiring for the programmable relay board option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 51 Control wiring for the input contact isolator board option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 52 Control wiring for comms board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Figure 53 Control wiring for the internal modem option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 54 Control wiring for the Network Interface Card (NIC) option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 55 Control wiring for the RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 56 Control wiring for remote source selection option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 57 Color LCD touch screen display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 58 STS2/PDU touch screen display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 59 STS2/PDU touch screen display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 60 Source Transfer screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 61 Gate board viewing slot locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 62 STS2/PDU Touch Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 63 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 64 Keyboard and keypad displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 65 Key lockout switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 66 Event Mask dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 67 User settings dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 68 Source setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 69 PDU setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 70 Comm options dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Figure 71 Modem dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 72 Input Contact Isolator dialog box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 73 Programmable relay board dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 74 System options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 75 PDU options button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 76 Event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Figure 77 History log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

TABLES

Table 1 Shipping weights (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 2 Heat output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 3 Altitude conversion—feet to meters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 4 Input/output conduit plate specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 5 Remote source selection terminal block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 6 Terminal block 1 and terminal block 2 wire connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 7 Distribution configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 8 Programmable relay board pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 9 Input circuit breaker schedule, 250-800A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 10 Output circuit breaker schedule, 250-800A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 11 Non-automatic breaker schedule, 250-800A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 12 Event messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Table 13 Terminal commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Table 14 Value types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Table 15 Group settings and values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Table 16 Binary-hexadecimal conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 17 Setpoint parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Table 18 PDU setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Table 19 Standard settings for programmable relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Table 20 Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 21 Output voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 22 System current ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 23 Electrical requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 24 Unit short circuit withstand capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 25 Frame sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table 26 MTA plug pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 27 DB9 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 28 RS-232 settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Table 29 Torque tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Table 30 Branch circuit breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Table 31 Programmable relay board settings record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 32 Input contact isolator settings record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be followed during the installation and maintenance of the Liebert Static Transfer Switch 2 Power Distribution Unit (STS2/PDU).

Read this manual thoroughly, paying special attention to the sections that apply to your installation, before working with the Static Transfer Switch 2 Power Distribution Unit. Retain this manual for use by installing personnel.

Refer to 1.2.1 - Handling Considerations before attempting to move the unit.

WARNING

The unit is supplied by more than one power source. The unit contains hazardous voltages if any of the input sources are on, even when the unit is in bypass. To isolate the unit, turn off and lock out all input power sources.

Verify that all input power sources are de-energized and locked out before making connections inside unit.

Lethal voltages exist inside the unit during normal operation. Only qualified service personnel should perform maintenance on the STS2/PDU.

NOTE

Read the entire manual before installing or operating the system. Adhere to all operating instructions and warnings on the unit and in this manual.

WARNING

Under typical operation and with all STS2/PDU doors closed, only normal safety precautions are necessary. The area around the STS2/PDU should be kept free of puddles of water, excess moisture and debris.

ONLY qualified service personnel should perform maintenance on the Static Transfer Switch 2 Power Distribution Unit. When performing maintenance on any part of the equipment under power, service personnel and test equipment should be located on rubber mats. The service personnel should wear insulating shoes for isolation from direct contact with the floor.

One person should never work alone, even if all power is removed from the equipment. A second person should be standing by to assist and summon help in case an accident should occur.

WARNING

The input sources to the STS2/PDU must be grounded-wye sources. Input sources other than solidly grounded-wye sources may cause damage to the switch.

Liebert Corporation neither recommends nor knowingly sells this product for use with life support or other FDA-designated “critical” devices.

The Static Transfer Switch 2 Power Distribution Unit is suitable for indoor use only. Protect the unit from excessive moisture and install the unit in an area free from flammable liquids, gases and corrosive substances.

The unit is designed to operate from solidly grounded AC power sources only. Provide input over-current protection in accordance with the unit ratings. Wire and ground the unit according to national and local electrical safety codes. All wiring should be installed by a qualified electrician.

A thorough equipment inspection and supervised start-up by qualified service personnel are strongly recommended at these times:

1. Before unit is placed into service for the first time

2. After equipment relocation, and

3. After the unit has been de-energized for an extended period of time

CAUTION

This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J of the FCC rules and EN550022. 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.

WARNING

Locate the center of gravity symbols and determine the unit’s weight before handling the cabinet.

1.0 UNPACKING AND INSPECTIONS

NOTE

Read the entire manual before beginning to install the STS2/PDU. Upon delivery of the STS2/PDU, the installer should perform the following steps to ensure a high-quality installation.

A high-quality installation begins on the receiving dock. The STS2/PDU and its packaging should be inspected when the unit is delivered. If the packaging is not damaged, unpack the unit and conducting internal inspection before beginning the installation process. This section discusses inspecting and unpacking the STS2/PDU.

1.1 External Inspections

1. While the STS2/PDU is still on the truck, inspect the equipment and shipping container(s) for any signs of damage or mishandling. Do not attempt to install the system if damage is apparent.

2. Upon receipt and before unpacking, inspect the shipping crate for damage or mishandling. Check the Shock-Watch™ indicator.

• If the indicator is red, note on shipper’s receipt and check for concealed damage.

• If any damage as a result of shipping is observed, file a damage claim with the shipper within 24 hours and contact your local Liebert representative or Liebert Global Services at 1-800-543-2378 to inform them of the damage claim and the condition of the equipment.

3. Locate the bag containing the keys for the front access door. The bag is attached to the cabinet.

4. Compare the contents of the shipment with the bill of lading. Report any missing items to the carrier and to Liebert Global Services immediately.

5. Check the nameplate on the cabinets to verify that the model numbers correspond with the one specified. Record the model numbers and serial numbers in the front of this installation manual. A record of this information is necessary should servicing be required.

6. If unit is to be stored before installation, it is recommended to store the unit in a dry environment with temperatures in the range of -40 to 176°F (-40 to 80°C). Use original packing materials or other suitable means to keep the unit clean. When opening the shipping crate, use care not to puncture the container with sharp objects.

Unpacking and Inspections

1.2 Unloading and Handling

CAUTION

When moving the unit by forklift, lift the unit from the rear so as to protect the front panel. Do not exceed a 15 degree tilt with the forklift.

Also, if you are moving the unit by forklift or pallet jack after it has been removed from the pallet, be aware of the location of the casters and leveling feet (if unit is so equipped) so as not to damage them.

Most STS2/PDU models are contained in one cabinet. The 800 amp units are contained in two cabinets that shipped on two pallets and connected together in the field.

The unit can be moved by forklift or pallet jack. However, because the weight distribution in the cabinet is uneven, use extreme care during handling and transporting.

See 1.2.2 - Unit Preparation for instructions on removing the STS2/PDU from the pallet.

1.2.1 Handling Considerations

The STS2/PDU is bolted to a wood shipping pallet to allow handling by forklift equipment or a pallet jack.

WARNING

Exercise extreme care when handling STS2/PDU cabinets to avoid equipment damage or injury to personnel.

The cabinet can be safely tilted 15 degrees in any direction by forklift. If moving the unit up a ramp on its casters (if the unit is so equipped) or a pallet jack, ensure

that the incline does not exceed 15 degrees. Locate the center of gravity symbols and determine the unit’s weight before handling

the cabinet.

Check the unit size and weight. Refer to the cabinet drawings furnished with the unit for size and weight. Typical cabinet dimensions are shown in Figures 7 through 22. Typical unit crated weights are:

Table 1 Shipping weights (typical)

Model Weight - lbs. (kg)

250A 3730 lbs. (1692 kg)

400A 4900 lbs. (2132 kg)

600A 5580 lbs. (2531 kg)

800A Module A* 4052 lbs. (1838 kg)

800A Module B* 4595 lbs. (2084 kg)

*800A ships on two separate pallets

Unpacking and Inspections

Plan the route. Review the route over which the unit will be transported to its installation location to ensure that all passages are large enough to accommodate the unit and support the weight.

Check for any non-negotiable corners or offsets in hallways. Before moving the unit to the intended location, review 2.0 - Location Considerations.

1.2.2 Unit Preparation

The unit can be removed from the pallet before it is moved to its location.

Complete the following steps to properly remove the STS2/PDU from the shipping pallet:

1. Set the pallet in a level area with enough room to maneuver and remove the unit.

2. Remove the bolts holding the unit to the shipping pallet (located in the base of the unit).

3. Remove the shipping blocks from under the frame of the unit.

4. Use a forklift to raise the unit off the pallet and onto the floor. On the 250A unit ensure that the forklift is clear of the unit's casters and leveling feet. Lift the unit from the rear.

5. Conduct an internal inspection of the unit. See the list in 1.3 - Internal Inspections.

1.3 Internal Inspections

After the STS2/PDU has been unpacked, conduct an internal inspection:

1. Verify that all items have been received.

2. If spare parts were ordered, verify their arrival.

3. After the Static Transfer Switch 2 Power Distribution Unit has been removed from the pallet, open the door and remove cabinet panels to check for shipping damage to internal components.

4. Check for loose connections or unsecured components in the cabinet(s).

5. Check for any unsafe condition that may be a potential safety hazard.

After the STS2/PDU has been inspected and no problems are found, the unit can be moved to its installation location. If using a forklift, remember to lift the unit from the rear.

2.0 LOCATION CONSIDERATIONS

The STS2/PDU should be placed in a clean, cool and dry location. The 250A unit without an output cabinet requires only front access for installation and maintenance. Both front and side access are required for installation and maintenance of 400-800A units and 250A units with output cabinet. The output cabinet comes factory installed or either the right or left side depending on how it was ordered. It cannot be moved from one side to the other in the field.

Adequate space is required above the unit for conduit (if configured as such) and cooling air flow. This section provides specific information for these considerations.

The unit is designed with top and bottom cable terminations to allow maximum flexibility in its installation. Units with output inline panelboards are bottom exit only. If bottom cable entry and exit is used, sufficient cable bending space must be provided by a raised floor or a floor stand.

For dimensions of each unit, see Figures 7 through 22. If your unit is equipped with an optional key lockout switch, see Figures 13 through 21 for the location of that switch.

2.1 Recommended Minimum Service Clearances

The recommended service clearances are at the front and side, if equipped with output cabinet. The minimum service clearance required by the National Electrical Code (NEC) Article 110-26 is 36 in. (91cm) for units with voltages up to 150V to ground and 42 in. (107cm) for units with voltages over 150V to ground. Clearance of at least 18 in. (46cm) is required above the unit for cooling air flow.

Location Considerations

2.2 Heat Output

The unit produces minimal heat during normal operation.

Table 2 Heat output

Heat Output

Switch Size

250A 12,590 (3.69)

400A 20,140 (5.90)

600A 30,200 (8.85)

800A 40,270 (11.80)

BTU/Hr (kW)

2.3 Operating Environment

The unit is designed to be installed indoors where the ambient air temperature is in the range of 32° to 104°F (0°C - 40°C) with a relative humidity of 0% to 95% non-condensing, up to an altitude of 4000 feet (1200 meters).

2.4 Altitude

The standard units are designed for full load operation up to 4000 feet (1200m) above sea level. See Figure 1 for recommended deratings for altitudes greater than 4000 feet (1200m).

Figure 1 Recommended derating for high altitude operation

100

Rating (%)

7000

6500

6000

5500

5000

4500

4000

7500

8000

8500

9000

Location Considerations

9500

10000

Operation at full load at a higher altitude can be accommodated in ambient temperatures less than 104°F (40°C) ambient. Figure 2 shows the maximum allowable ambient temperature for full load operation at altitudes above 4000 feet (1200m).

Figure 2 Maximum ambient temperature for full load operation at higher altitudes

104.0 (40)

102.2 (39)

100.4 (38)

98.6 (37)

96.8 (36)

95.0 (35)

93.2 (34)

94.1 (33)

°F (°C)

89.6 (32)

87.8 (31)

86.0 (30) 0

4000

4500

5000

5500

6000

6500

7000

7500

8000

Max. Ambient Temperature

8500

Altitude—Feet

Table 3 Altitude conversion—feet to meters

Feet = Meters

4000 = 1200 7500 = 2286

4500 = 1372 8000 = 2438

5000 = 1524 8500 = 2591

5500 = 1676 9000 = 2743

6000 = 1829 9500 = 2896

6500 = 1981 10000 = 3048

7000 = 2134

9000

9500

10000

3.0 LOCATING THE STS2/PDU

This section provides instructions for leveling the STS2/PDU and anchoring the unit to the floor, should that be required.

3.1 Anchoring the Unit to the Floor

The STS2/PDU can be anchored to the concrete floor to ensure stability for the unit in the event of seismic activity.

3.2 Leveling of the 250A Only STS2/PDU Without Anchoring

The 250A Static Transfer Switch 2 Power Distribution Unit is furnished with casters and leveling feet. After final positioning of the unit, adjust the leveling feet located in each corner of the frame base to level and stabilize the unit.

For leveling feet details, see Figures 7 through 11.

Locating The STS2/PDU

4.0 POWER AND CONTROL WIRING

All power and control wiring must be installed by a licensed, qualified electrician. All power and control wiring must comply with the National Electrical Code and all applicable local codes. Unless otherwise labeled, use the recommended tightening torque shown in Table 29.

The input power busbars are accessible through the front of the unit. Liebert’s 250A units have PEM nut inserts designed to allow one-handed tightening. Busbars in the 400-800A units are supplied with holes to accommodate two-hole lugs.

Cables can be installed through the top or bottom of the unit through removable conduits plates. Units with output inline panelboards are bottom exit only for output cables.

See Figures 12 through 21 for wiring entrance locations.

4.1 Input and Output Power Connections

The input power connections are made to the busbars provided inside the unit (see Figures 26 through 31). These busbars are accessible through the front of the unit.

Output power connections are handled two different ways, depending on the type of distribution used. Power connections on standard units with an output breaker are made to the busbars inside the unit. These busbars are accessible through the front on 250A units and on the side on 400-800A units. See Figures 26 through 31 for details on the busbars. Power connections on units with panelboard distribution are made directly to the panelboard breakers. Busbars are provided in the output cabinet for ground and neutral connections.

Power and Control Wiring

WARNING

Verify that all input power and control circuits are de-energized and locked out before making connections inside unit.

The two input power feeds (sources) to the STS2/PDU should be from two independent sources to avoid a common source failure.

To ensure proper operation of the STS2/PDU, the two input sources must be the same nominal voltage level and phase rotation.

For uninterrupted automatic transfer, the two input sources should be synchronized within 15 degrees.

CAUTION

The input sources to the STS2/PDU must be grounded-wye sources. Input sources other than solidly grounded-wye sources may cause damage to the switch.

The STS2/PDU is designed for operation with 3-wire, solidly grounded sources only.

See Figures 3 through 6 for typical one-line diagrams. Refer to Figures 26 through 31 for electrical field connections on all units.

Power and Control Wiring

Figure 3 Typical STS2/PDU, one-line diagram

Figure 4 Typical STS2/PDU, one-line diagram, with dual static switch output circuit breakers

(not available on 250A units)

Power and Control Wiring

Figure 5 Typical STS2/PDU, one-line diagram, with inline distribution, dual static switch output circuit

breakers

Figure 6 Typical STS2/PDU, one-line diagram, with I-Line distribution, dual static switch output circuit

breakers

The input and output power wire size should be based on the overcurrent protection device, observing the NEC and local codes.

The STS2/PDU output power, ground and neutral busbars accommodate a wide range of wire sizes. The STS2/PDU busbars accommodate standard two-hole lugs.

Table 4 Input/output conduit plate specifications

Rating

250A

400-600A

800A

Maximum Number

of Conduits Size, in.

12 2"

82-1/2" 6 3" or 3-1/2" 6 2" 4 2-1/2" or 3" 62-1/2" 5 3" or 3-1/2"

4.2 System Grounding

Equipment grounding—Grounding is primarily for equipment and personnel safety, although proper grounding also enhances equipment performance.

All input and output power feeds must include an equipment grounding means as required by the NEC and local codes.

An insulated equipment ground conductor is recommended to run with each input and output power feed. The equipment ground conductors should be at least the minimum size conductor per the NEC based on the upstream overcurrent protection device.

WARNING

If conduit is used as a grounding means, adequate electrical continuity must be maintained at all conduit connections. The use of isolating bushings with a metal conduit can be a safety hazard and is not recommended.

4.3 Control Wiring Connections

No control wiring is needed on the standard STS2/PDU. Certain options and remote monitoring configurations require external control wiring. See 6.0 - Options for details.

The customer must supply control wiring to the STS2/PDU for connection to any monitoring or communication options. Top and bottom removable conduit plates are provided for control wiring conduit.

Control cables can be installed through the top or bottom of the unit through removable control conduit plates. A top hat is provided on the 400-600A units for connecting the top entry control wiring conduits (see Figures 13 through 21). The top hat is turned upside down and ships inside the unit. It must be removed from the unit and flipped 180 degrees before being reinstalled (see Figure 49). The control wiring top hat does NOT contain any knockouts for conduit. The installer must drill the appropriate-sized holes for the conduit before attaching to the top of the STS2/PDU.

See Figures 47 and 48 for arrangement of optional cards.

Power and Control Wiring

4.4 Remote Source Selection Wiring

An optional Remote Source Selection board may be installed in your STS2/PDU. This board is installed in the same bay as the communications options. See Figures 47 and 48 for the location of these options. See Figure 56 for information on the control wiring for the Remote Source Selection option.

The Remote Source Selection allows you choose the preferred input source from a remote location.

Terminal connections allow the customer to remotely select a source to be the preferred source in the same process as the local source transfer selection.

If both the input contacts are closed, the current selected preferred source shall be retained. If the unit’s preferred source selection and Remote Source Selection are active at the same time, the STS2/PDU follows the last request for a preferred source change, regardless of whether it was from the local or Remote Source Selection controls.

A six pin terminal block provides the Remote Source Selection connections. Two pairs of wires are used from the switch to trigger the source selection. You can select the type of switch used for this remote control. Connections are made to four of the connections, using Form A dry contacts. The contacts are numbered left to right:

Table 5 Remote source selection terminal block

Contact Connection

1 Source 1 2 Isolated ground 3 Source 2 4 Isolated Ground 5 DO NOT USE 6 DO NOT USE

See 10.3 - Enabling Remote Source Selection for instructions on enabling the Remote Source Selection option.

4.5 Power Supply

The STS2/PDU is supplied with redundant power supplies that are designed to operate from a voltage range of 200V to 600V. The unit is set at the factory to match the nameplate voltage. Field adjustments are not necessary. If the unit needs to operate at a voltage other than what is listed on the nameplate, contact Liebert Global Services or your local Liebert representative. Table 6 provides transformer tap information.

Table 6 Terminal block 1 and terminal block 2 wire connections

Voltage

200 1 9 1 9 1-7

220 2 12 2 12 6-8

3801818 2-7

415 1 10 1 10 4-7

600 1 12 1 12 6-7

208 1 10 1 10 1-7

240 1 11 1 11 1-7

400 1 9 1 9 3-7

480 1 11 1 11 5-7

Power and Control Wiring

Connect Connect

Jumper BetweenF1 TB1-XX F2 TB1-YY F3 TB2-XX F4 TB2-YY

CAUTION

Using Table 6, ensure that the wiring for the control transformers matches the input voltage for the unit.

Improper wiring could result in blown fuses.

5.0 OUTPUT POWER WIRING

The STS2/PDU standard model is provided with a circuit breaker for connecting to the load or a remote distribution cabinet. Other distribution configurations are available.

The three main types of distributions available for the STS2/PDU are:

• Output Breaker

• Inline Panelboards—two panelboards (84 poles) on 250A units and four panelboards (168 poles) on 400-800A units. Square D bolt-in or plug-in breakers.

• Square D I-Line to 250A. Additionally, 300A to 400A breakers are available on 800A units.

For other optional distribution methods, contact your local Liebert representative or call 1-800-LIEBERT.

The STS2/PDU distribution may be mounted on either the right or left side at the customer’s option. Location of output conduit connections is affected by the location of the output cabinet. See

Figures 8, 9, 12, 13, 16 and 17 for wiring a right-side distribution configuration and Figures 10, 11, 14, 15, 18 and 19 for wiring a left-side distribution configuration. See Figures 23

through 44 for wiring.

See Table 7 for wiring the various output options.

Panelboard—designed to accommodate up to 10 plug-in breakers from 100A

Output Power Wiring

and General Electric panelboards are available to accommodate

5.1 Customer Connections

The customer is responsible for connections from the STS2/PDU distribution to the connected load, either directly or through remote distribution cabinets.

Table 7 Distribution configurations

For Details See

Distribution Type

Output Breaker

250A Figure 23

400-600A Figure 33

800A Figure 35

Inline Panelboards

250A Figure 30

400-800A Figure 31

I-Line (Square D) Figure 32

Electrical Output Field Connections

6.0 OPTIONS

This section discusses the options available for the STS2/PDU. The communications options are also discussed in 12.0 - Communication Interfaces.

WARNING

All options must be installed by Liebert Global Services or Liebert factory-authorized service provided by a Liebert distributor. The option area and customer control cable area contain hazardous voltages if any of the input sources are on, even when the unit is in bypass. Turn OFF all power sources before installing customer control cables to any option.

6.1 Programmable Relay Board

The programmable relay board (PRB) provides a means to trigger an external device when an event occurs in the STS2/PDU. Each PRB has 8 channels. Each channel has two sets of Form-C dry contacts, rated 1A @ 30VDC or 250mA @ 125VAC.

Any alarm or event may be programmed to any channel or channels. Up to ten (10) events may be programmed to a relay. If multiple events are grouped to one relay, group the events logically to simplify troubleshooting when an event is triggered. The same alarm or event may be programmed to more than one channel. Up to two programmable relay boards can be installed in the STS2/PDU for a total of 16 channels. Programming is performed through the touch screen display.

See Configuring the Programmable Relay Board Settings on page 109 for default settings and instructions for reconfiguring the relays. See Figures 47 and 48 for the location of the PRB. See Figure 50 for wiring details. Table 8 provides the PRB pinout.

Table 8 Programmable relay board pinout

Channel Pin No. C N.C. N.O.

CH1

TB1

TB2

TB3

TB4

Key: N.O. = Normally Open; N/C. = Normally Closed; C = Common Note: Pin 16 not used on TB1, TB2 and TB3.

CH2

CH3

CH4

CH5

CH6

CH7

CH8

A1-3 12 3

B4-6 45 6

A7-9 78 9

B 10-12 10 11 12

A 13-15 13 14 15

B1-3 12 3

A4-6 45 6

B7-9 78 9

A 10-12 10 11 12

B 13-15 13 14 15

A1-3 12 3

B4-6 45 6

A7-9 78 9

B 10-12 10 11 12

A 13-15 13 14 15

B1-3 12 3

Options

6.2 Input Contact Isolator Board

The Input Contact Isolator Board (ICI) provides an STS2/PDU module interface for up to eight external user alarm or message inputs to be routed through the Static Transfer Switch 2 Power Distribution Unit’s alarm network. The eight contacts are normally open dry contacts. When a contact closes, an event is triggered.

The Input Contact Isolator options are configured through the Input Contact Isolator dialog box, which is accessed from the Comm Option dialog box on the touch screen display. You also can program the alarm messages through this dialog box. See Configuring the Input Contact Isolator Settings on page 108 for instructions on configuring the connections.

See Figures 47 and 48 for the location of the ICI. See Figure 51 for wiring details.

6.3 Comms Board

The Comms Board provides a communication interface to Liebert SiteScan, site monitoring product and/or an external or internal modem. SiteLink-12 or SiteLink-4 is required for SiteScan to communicate with the STS2/PDU.

The Comms Board is equipped with an RS-422 communication port for communication to a Liebert SiteScan monitoring system using a 2-wire twisted pair for reliable communication up to 1000 meters (3281 feet). Information available from the RS-422 port includes the present switch status information, all monitoring parameters and all active alarms.

The Comms Board is equipped with a modem interface for remote reporting of the present switch status information, alarm history information and the history of status screens that are triggered upon a major alarm event. The monitoring system software also supports an auto-dial feature that allows the system to automatically dial programmed phone numbers by way of the modem to report designated alarm conditions.

Programming the Comms Board is performed through the touch screen display. See Comm Options on page 105 for details.

See Figures 47 and 48 for the location of the Comms Board. See Figure 52 for information on the control wiring.

6.4 Internal Modem

The Internal Modem is an option that must be ordered separately. An external modem is available from third party sources. The Internal Modem is capable of dialing out from the STS2/PDU or accepting incoming calls and connecting to a remote terminal or computer. Using an ASCII Query and Answer format the modem connection can be used to view system status and alarms. The modem provides all information normally available on the LCD of the STS2/PDU. No control functions are available via the modem, such as making transfers, selecting a preferred source or changing configurations.

Options

The modem can also be configured to dial out two different telephone numbers (any combination of modem or pager numbers).

The connection to this modem is through a standard RJ-11 port.

See Figures 47 and 48 for the location of the internal modem. See Figure 53 for more information on the internal modem.

Programming the modem is performed through the touch screen display, see Configuring the Modem on page 105 for details.

The modem commands are shown in Table 13.

6.5 Network Interface Card (NIC)

An OpenComms Network Interface Card (NIC) enables the STS2/PDU to communicate to a network management system (NMS). The NIC provides the internal hardware and software to communicate, via SNMP, to any I.P.-based Ethernet network through an RJ-45 connector using Category 5 cabling.

The NIC provides redundant paths for communications that make it possible to connect to a Building Management System (BMS) using Modbus, while simultaneously communicating to a NMS through SNMP. A terminal block provides the connection to Modbus.

See Figures 47 and 48 for the location of the NIC. See Figure 54 for control wiring information.

If you have questions about the NIC, refer to the OpenComms Network Interface Card Installation and Users Guide.

6.6 Remote Source Selection

The Remote Source Selection allows the preferred input source to be chosen from a remote location. A user supplied normally open dry contact allows the user to remotely select a source to be the preferred source in the same process as the local source transfer selection.

See 10.3 - Enabling Remote Source Selection for instructions on enabling the Remote Source Selection.

See Figures 47 and 48 for the location of the Remote Source Selection option.

See 4.4 - Remote Source Selection Wiring and Figure 56 for information on the control wiring.

6.7 Key Lockout Switch

The key lockout switch activates a software lockout of the touch screen display to prevent manual transfers and configuration changes. When locked out, the touch screen becomes a read-only display. A key is needed to do manual transfers or change settings.

The alarm silence button is not disabled when in the lockout position.

The switch is located on the front of the unit next to the display; it is behind the front door but can be operated without opening the front door. See Figures 20 through 22 for the key lockout switch location on each unit.

See 13.2.1 - Security and Figure 65 for instructions on using the key lockout switch.

Options

6.8 Static Switch Redundant Output Breaker

A plug-in, non-automatic circuit breaker is provided which allows redundancy in the static switch output power path. The breaker is connected in parallel with the static switch output plug-in non-automatic circuit breaker.

6.9 Inline Panelboards

An output distribution cabinet with either Square D or General Electric inline panelboards with copper bus to accept bolt-in or plug-in circuit breakers. Each panelboard is individually protected by a 225A, 240V, 3-pole panelboard main circuit breaker.

Each panelboard includes a separate isolated neutral bus bar and a safety-ground bus bar for the neutral and safety-ground connections for at least 42 output circuits.

6.10 I-Line Panelboards

An output distribution cabinet with one vertically mounted Square D I-Line panelboard with copper bus to accept Square D three phase plug-in circuit breakers. The panelboard shall be totally enclosed with an accent cover.

6.11 Subfeed Breakers

Breakers for feeding remote panelboard(s) or other loads. Available in ratings of 225A or 400A.

NOTE

Only available on units with inline panelboards. 400A breaker not available on 250A units.

6.12 K-Factor Transformers

K20-rated double-shielded copper isolation transformer specially designed to accommodate highly nonlinear leads in accordance with UL 1561 (in place of standard isolation transformer).

6.13 Surge Suppression System

A fused and monitored high-energy, 80 kAmp/phase surge suppression system by Control Concepts connected to each input of the unit for superior surge suppression.