Unipower INV2500-HS, INV5000-HS Operating Manual

INV2500-HS and INV5000-HS

TELECOM INVERTERS

OPERA TING MANUAL

PRICE: $25.00

Manual No. INV-802-3

09/4/02 INV2500HS-5000HS-Man-Rev3

www.unipowertelecom.com

© 2002 UNIPOWER Corp.

All Rights Reserved

UNIPOWER T elecom, Division of UNIPOWER Corporation

NORTH AMERICA • 3900 Coral Ridge Drive, Coral Springs, Florida 33065, USA • Tel: [phone] • Fax: [phone] • [e-mail]

EUROPE • Parkland Business Centre, Chartwell Road, Lancing BN15 8UE, ENGLAND • Tel: [phone] • Fax: [phone] • [e-mail]

CONTENTS

SECTION TOPIC PAGE

1.0 Introduction 1

2.0 Important Features 1

3.0 Product Line 3

4.0 Safety W arnings 3

5.0 Warranty 4

6.0 Unpacking and Inspection 4

7.0 Description of Operation 5

8.0 Front and Back Panel Descriptions 5

9.0 Electrical Specifications 7

10.0 Mechanical Dimensions of Shelves 8
1 1.0 Safety and Industry Standards 8

12.0 Operating Information 10

13.0 Parallel Operation 1 3

14.0 Installation and Testing 15

15.0 Inverter Application 17

16.0 Replacing An Inverter Module 18

17.0 Maintenance 19

18.0 T roubleshooting Guide 19

ILLUSTRATIONS

FIGURE TITLE PAGE

1 INV2500-HS and INV5000-HS Inverter Models 2
2 Front & Back of INV2500-HS Module 6
3 Front & Back of INV5000-HS System 6
4 Mechanical Dimensions of INV5000-HS & INVR2U-HS Shelves 9
5 INV2500-HS Inverter Output Waveforms 1 1
6 INV2500-HS & INV5000-HS Overload Characteristic 12
7 Connections for ORing Form C Relay Outputs on INV5000-HS 1 2
8 Inverter Module Pin Connections 14
9 Two 115V AC INVR2U-HSs in Parallel Using AC Distribution Panel 16
10 Output Connections for Inverters 16

INV2500-HS AND INV5000-HS TELECOM INVERTERS

1.0 INTRODUCTION

1.1 This Operating Manual should be read through carefully before installing and

operating the INV2500-HS inverter modules or INV5000-HS inverter
systems. See Figure 1.

1.2 The INV2500-HS is a 2500 volt-ampere hot-swap, telecom inverter module. It
converts a nominal 48VDC input into a 1 15V AC output at 50 or 60Hz. These
modules are designed to go into a 19-inch, hot-swap compatible shelf,
INVR2U-HS, which holds one or two units. When two units are used in this
shelf they are automatically connected in parallel and synchronized to pro­duce 5000 volt-amperes at 1 15V AC output (44 amperes). Or they can be
operated in a 1+1 redundant mode at 2500 volt-amperes.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

OPERA TING MANUAL

1.3 For 230VAC output at 50 or 60 Hz there are two other inverter models, desig-

nated INV5000-HS-230, which use two INV2500-HS units connected in
series in their shelf to give the higher voltage. See the product line designa­tion in Section 3.0. The output is 230V AC at 22 amperes, or 5,000 volt­amperes.

1.4 The 48VDC nominal input has a range of 42 to 56VDC. The inverters achieve
90% efficiency and 7V A per cubic inch power density . Input and output are
both circuit breaker protected. They have high surge capability for starting
loads such as motors, but the output breaker quickly trips if power attempts
to flow back into a faulted inverter.

1.5 These inverters can be paralleled for higher output power or for N+1 redun­dant applications. They are fully isolated from the battery . Front panel LEDs
indicate inverter status, and Form C relay alarm contacts are available on the
back. The units are self-cooled by internal fans.

2.0 IMPORT ANT FEA TURES

The following is a summary of the important features of the INV2500-HS and
INV5000-HS inverters:

u Two Mounting Positions High: 3.5 Inches
u 2500VA Output for INV2500-HS

1

INV2500-HS & INV5000-HS SERIES

(a). INV2500-HS Inverter Module

OPERATING MANUAL

(b). INV5000-HS Inverter System

Figure 1. INV2500-HS and INV5000-HS Inverter Models

2

u 5000VA Output for INV5000-HS
u 7VA per Cubic Inch Power Density
u 115V AC Output at 22 or 44 Amperes
u 230VAC Output at 22 Amperes
u Low Distortion 50 or 60Hz Sine Wave
u 42 to 56VDC Input
u Fully Isolated from Battery Input
u 90% Typical Efficiency
u Up to 300% Surge Capability
u Powers Reactive Loads
u Circuit Breaker Input & Output Protection
u N+1 Redundant Operation
u 19- or 23-Inch Rack Mounting
u Overtemperature Protection
u Form C Relay Alarm Contacts
u LED Status Indicators
u Rear Safety Cover on Shelves

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

3.0 PRODUCT LINE

T able 3-1 T elecom Hot-Swap Inverter Modules

MODEL INPUT OUTPUT FREQ.

INV2500-HS-60 42-56VDC 115VA C@22A 60Hz
INV2500-HS-50 42-56VDC 115VA C@22A 50Hz

T able 3-2 Hot-Swap Inverter Shelf

MODEL RACK SIZE HEIGHT CAPACITY

INVR2U-HS 19 or 23 Inches 2RU (3.5 Inches) 2 INV2500-HS

T able 3-3 230VAC Inverter Systems

MODEL INPUT OUTPUT FREQ.

INV5000-HS-230-60 42-56VDC 230VAC@22A 60Hz
INV5000-HS-230-50 42-56VDC 230VAC@22A 50Hz

4.0 SAFETY W ARNINGS

4.1 These telecom inverters have hazardous external and internal voltages. They

should be handled, tested and installed only by qualified technical persons
who are trained in the use of power systems and are well aware of the haz­ards involved.

4.2 The input and output terminals are at hazardous voltage potentials. Do not
touch these areas when power is applied.

3

4.3 When operating these inverters, the chassis ground terminal must be con­nected to safety ground to minimize electrical shock hazard and to ensure low
EMI (electromagnetic interference).

4.4 The internal voltages are at hazardous potentials. The inverter covers should
not be removed. There are no user-serviceable components in these units.
Removing the covers of the inverters will void the warranty .

5.0 W ARRANTY

All products of UNIPOWER Telecom, a division of UNIPOWER Corporation, are warranted for
two (2) years from date of shipment against defects in material and workmanship. This warranty
does not extend to products which have been opened, altered or repaired by persons other than
persons authorized by the manufacturer or to products which become defective due to acts of
God, negligence or the failure of customer to fully follow instructions with respect to installation,
application or maintenance. This warranty is extended directly by the manufacturer to the buyer
and is the sole warranty applicable. EXCEPT FOR THE FOREGOING EXPRESS WARRANTY,
THE MANUFACTURER MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICU­LAR PURPOSE. As the sole and exclusive remedy under this warranty, the manufacturer, at its
option, may repair or replace the non-conforming product or issue credit, provided the
manufacturer’s inspection establishes the existence of a defect. To exercise this remedy, the
buyer must contact the manufacturer’s Customer Service Department to obtain a Return Material
Authorization number and shipping instructions. Products returned without prior authorization
will be returned to buyer. All products returned for repair must be shipped freight prepaid to
UNIPOWER. If the buyer fails to fully comply with the foregoing, the buyer agrees that no other
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost
sales, injury to person or property or any other incidental or consequential losses) shall be

available to the buyer.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

6.0 UNP ACKING AND INSPECTION

6.1 This INV2500-HS or INV5000-HS was carefully tested, inspected and pack-

aged for shipment from our factory . Upon receipt of the unit, it should be
carefully unpacked and inspected for any damage in shipment.

6.2 If there is evidence of damage, do not attempt to test the unit. The freight
carrier should be notified immediately and a claim for the cost of the inverter
should be filed with the carrier for direct reimbursement. Be sure to include
the model and serial number of the damaged unit in all correspondence with
the freight carrier . Also save the shipping carton and packing material as
evidence of damage for the freight carrier’s inspection.

6.3 UNIPOWER T elecom will cooperate fully in case of any shipping damage
investigation.

4

6.4 Always save the packing materials for later use in shipping the unit. Never
ship the inverter without proper packing.

7.0 DESCRIPTION OF OPERA TION

7.1 The INV2500-HS modules employ MOSFET and IGBT power semiconductor

switches with advanced, high-frequency , pulse modulation techniques to
produce a low-distortion, 50 or 60Hz sine wave output with 90% efficiency
and 7V A per cubic inch power density . A synchronization circuit lets two or
more inverter modules operate in parallel with their outputs in phase-synchro­nization and current shared.

7.2 The INV5000-HS-230 inverter system consists of two INV2500-HSs oper­ated in series for a 230V AC output at 5,000 volt-amperes (22A). The series
connection of the units is made internally in the shelf. Each of the two inverter
modules has its own input and output breakers, indicator LEDs and Form C
relay contacts. The two inverter modules in the INV5000-HS are different in
that their outputs are 180o out of phase with each other.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

7.3 Two INV2500-HS inverter modules in an INVR2U-HS shelf are connected in

parallel in the shelf and become an inverter system with a 1 15V AC output at
5,000 volt-amperes (44A).

7.4 For the purpose of this manual, the INV5000-HS-230 and two INV2500­HS modules in an INVR2U-HS shelf are both 5,000 V A inverter systems
and will be referred to as an INV5000-HS where the generic meaning is
conveyed. While the two different shelves are identical in size and appear-

ance, they differ in their internal module connection (series or parallel).

8.0 FRONT AND BACK P ANEL DESCRIPTIONS

8.1 Figure 2 shows the front and back of an INV2500-HS inverter module. On

the left side of the front panel of the INV2500-HS is the input circuit breaker.
T o the right are the two cooling fans and the output circuit breaker . Above the
output breaker from the top are the green LED indicators for Input OK, Sync
OK and Output OK.

8.2 On the INV2500-HS back panel on the right side is the hot-swap connector
which contains all power and signal connections.

8.3 Figure 3 shows the front and back of an INV5000-HS. Each front half (side A

5

INV2500-HS FRONT VIEW

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

ä

3.32

(84.3)

ä

ä

ä

8.50

(216)

ä

INV2500-HS BACK VIEW

ä

Figure 2. Front and Back of INV2500-HS Module

INV5000-HS FRONT VIEW

A SIDE B SIDE

ä

DC INPUT
BREAKER

AC OUTPUT

BREAKER

ä

18.32
(465)

ä

DC INPUT
BREAKER

HOT-SWAP

CONNECTOR

AC OUTPUT

BREAKER

ä

3.46

(87.9)

ä

ä

ä

Figure 3. Front and Back of INV5000-HS System

INV5000-HS BACK VIEW

6

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

or side B) of this inverter is a INV2500-HS. The back panel has a transparent
plastic safety cover . The INVR2U-HS shelf with two INV2500-HS inverters in it
is identical in appearance and dimensions to the INV5000-HS, both front and
back. Both units have a front retention panel over the INV2500-HS modules.

8.4 On the INV5000-HS back panel to the left are the AC output screw terminals.
At the center is a terminal strip with the Form C relay contacts N.O., C and
N.C. for each side (A and B) of the inverter . T o the right are the input bus bars
with no. 1/4-20 studs. At the lower far right is the no. 10-32 stud chassis
ground connection.

9.0 ELECTRICAL SPECIFICA TIONS

Specifications typical at 48V input, full load and 25°C unless otherwise noted. Asterisk (*) means
specification is same as center column.

2 INV2500-HS

INPUT

Voltage Range .....................................................* ................................42-56 VDC................................ *

Input Current, Full Load, 48VDC .................. <60A DC ..........................<120ADC.......................... <120ADC

Input Current, No Load, 48VDC..................... <1A DC ............................. <2ADC.............................. <2ADC

Input Protection .................................................... * ......................100A Circuit Breaker(s) ...................... *

EMI Filter, Conducted .......................................... * ..................... FCC2078 pt.15J Curve A .................... *

Voice Band Noise/ A-H Battery ................<32dBrnC/240 ..................<32dBrnC/480.................. <32dBrnC/480

INV2500-HS

IN INVR2U-HS

EN55022 Curve A

INV5000-HS-230

OUTPUT

Voltage, Full Load .......................................... 115VAC ............................ 115VAC ............................ 230VAC

Voltage, No Load...........................................120VAC ............................ 120VAC............................ 240VAC

Current, Max. ................................................22A RMS..........................44A RMS.......................... 22A RMS

Frequency, ± 0.1%............................................... * ................................50 or 60Hz................................ *

Total Harmonic Distortion ....................................* ..................................... <2% ..................................... *

Load Crest Factor ................................................* ...................................2.8 to 1 .................................. *

Output Protection................................................. * .......................25A Circuit Breaker(s) ....................... *

Surge Capability .................................................. * ............................... Up to 300% ............................... *

Reactive Loads .................................................... * .................... +90° to - 90° Phase Angle ................... *

Efficiency .............................................................* ..................................... 90% ..................................... *

SAFETY STANDARDS .........................* ................... UL1950, CSA22.2 No.950, ................... *

EN60950

STATUS INDICATORS

Input OK...............................................................* ................................Green LED ............................... *

Sync OK............................................................... * ................................Green LED ............................... *

Output OK ............................................................* ................................Green LED ............................... *

Form C Relay Alarm Contacts.............................* .......................... Inverter Fail Alarm..........................*

7

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

ENVIRONMENTAL

Operating Temp. Range ......................................* ............................... 0°C to 70°C ............................... *

Output Current Derating ...................................... * ...................... 2.5%/°C, 50°C to 70°C ...................... *

Storage Temp. Range .........................................* ............................ -40°C to +85°C ............................ *

Humidity............................................................... * ................. 0% to 95%, Non-Condensing ................. *

Cooling ................................................................ * .............................. Internal Fans .............................. *

PHYSICAL SPECIFICATIONS

Case Material ...................................................... * ................................ Aluminum ................................ *

Finish, Front Panel & Shelf.................................. * .......................... Powder Coat Gray.......................... *

Dimensions, Inches (mm)

INV2500-HS............................... 3.32 H x 8.50 W x 12.00 D

(84.3 x 216 x 305)

INVR2U-HS Shelf .................................................................3.46 H x 18.32 W x 16.38 D

(87.9 x 465 x 416)

INV5000-HS-230 ..................................................................................................... 3.46 H x 18.32 W x 16.38 D

.............................................................................. (87.9 x 465 x 416)

Rack Mounting Width ......................................* ............................ 19 or 23 Inches............................ *

10.0 MECHANICAL DIMENSIONS OF SHEL VES

Figure 4 shows the mechanical dimensions for the INVR2U-HS and INV5000-HS
shelves. The shelves are identical at 16.38 inches (416mm) deep; with the rear
plastic cover they are 18.00 inches (457mm) deep.

1 1.0 SAFETY AND INDUSTRY ST ANDARDS

1 1.1 The INV2500-HS and INV5000-HS inverters meet the following safety

certifications:

ST ANDARD AGENCY

UL1950 UL
CSA22.2 No.950 CUL
EN60950 DEMKO

11.2 The INV2500-HS and INV5000-HS inverters are CE marked to indicate
conformance to the European Union’s Low Voltage Directive.

1 1.3 Input conducted EMI meets FCC20780 part 15J Curve A and EN55022

Curve A.

1 1.4 Input voice band noise is less than 32dBrnC for a single INV2500-HS with a

240 ampere-hour battery or an INV5000-HS or two INV2500-HSs with a 480
ampere-hour battery .

8

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

17.38
(441)

ä

3.46

(87.9)

ä

ä

18.32
(465)

ä

Figure 4. Mechanical Dimensions of INV5000-HS & INVR2U-HS Shelves

9

12.0 OPERA TING INFORMA TION

12.1 Input V oltage. These telecom inverters operate off a nominal 48VDC input

source which may be a battery or other DC source. The input voltage range is
42 to 56VDC. Input connections on the back of the INV5000-HS and
INVR2U-HS are to bus bars with no. 1/4-20 studs.

12.2 Output V oltage. The output voltage for an INV2500-HS is 1 15V AC at full
load, 120V AC at no load; for an INV5000-HS-230 it is 230V AC at full load,
240V AC at no load. See Figure 5(a). Frequency is 50 or 60Hz, ±0.1%. The
output voltage has total harmonic distortion of less than 2.0%. The load
current crest factor is 2.8 to 1, and surge capability is up to 300%. The output
will drive reactive loads with up to ±90o phase angle. The output connectors
are screw terminals on the back of the INV5000-HS or INVR2U-HS.

12.3 Output Power. Maximum output power for an INV2500-HS is 1 15V AC at
22A RMS giving a maximum of 2530 volt-amperes. For an INV5000-HS it is
230V AC at 22A RMS, giving a maximum of 5060 volt-amperes. Exceeding
these values may cause electronic shutdown of the output. Full output power
is produced at up to 50oC ambient temperature. Above this, output current
must be derated at 2.5%/oC. Maximum operating temperature is 70oC, at
which the output current must be derated by 50%.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

12.4 Overload Characteristic. These inverters incorporate electronic shutdown

circuitry; shutdown takes place during an overload, before the output circuit
breaker trips. Figure 5 shows INV2500-HS output voltage and current wave­forms for a full load step, sudden overload, and short circuit. Figure 6 shows
shutdown time versus output current for both the INV2500-HS and INV5000­HS. Below is a table that shows the same data in a different format:

T able 12-1. Typical Load Current vs. Shutdown T ime

PERCENT OF

RATED LOAD

114-173% 10 sec.
173-223% 1 sec.
223-318% 0.25 sec.

SHUTDOWN

TIME

As the table shows, the INV2500-HS and INV5000-HS are capable of han­dling large output surge currents, specifically more than three times rated
output current for 1/4 second, more than twice rated output current for 1
second and more than 1.5 times rated output current for 10 seconds. If the
surge exceeds approximately 318% of rated output current or exceeds the

10

INV2500-HS & INV5000-HS SERIES

(a) Full Load Step. V o (top) & Io (bot@20A/cm).

OPERATING MANUAL

1

2

1

2

(b)Sudden Overload Applied. V o (top) & Io (bot @ 50A/cm).

1

2

(c) Short Circuit Applied. V o (top) & Io (bot @50A/cm).

Figure 5. INV2500-HS Inverter Output Waveforms

11

Shutdown Time, Sec.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

01020304050607080
0 20 40 60 80 100 120 140 160

Output RMS Amperes

INV2500-HS or 230VAC INV5000-HS
2- INV2500-HS IN INVR2U-HS

Figure 6. INV2500-HS & INV5000-HS Overload Characteristic.

(a) Normally Open (b) Normally Closed

Figure 7. Connections for ORing Form C Relay Outputs

12

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

shutdown times shown in the table, the output will be shut down and must be
reset by turning both input and output circuit breakers off. After this, the
input breaker(s) should be turned back on (up position); after the Output OK
LED(s) come on the output breaker(s) should be turned back on (up posi­tion).

12.5 Grounding. The DC input ground, AC output ground, AC neutral and
chassis ground are all in common. The chassis ground should be connected
to system ground.

12.6 Status Indicators. Three green LEDs indicate the operating status of each
INV2500-HS inverter module. They are (from top to bottom): Input OK, Sync
OK and Output OK.

12.7 Form C Relay Contacts. These contacts have normally open (N.O.) and
normally closed (N.C.) positions for normal operation of each inverter . See
Figure 3 for connections. Note that there is a separate set of contacts for
each half (A and B sides) of the inverter . If it is desired to monitor the inverter
as a whole, the two sets of contacts may be connected as shown in Figure 7
to give an OR function for either set of contacts.

12.8 Sync Connections. There are +Sync and -Sync terminals on the terminal
block. When two or more inverters are connected in parallel these Sync
terminals must be connected together , observing the polarities.

12.9 Inverter Module Connections. If the INV2500-HS inverter module is oper­ated or tested separately from the shelf, connections should be made to the
J1 connector with a mating connector and the pin connections given in Figure

8.

13.0 P ARALLEL OPERA TION

13.1 The INV2500-HS and INV5000-HS Series inverters are designed to operate

in parallel for higher output current. For the INV2500-HS, the units are auto­matically connected in parallel in the INVR2U-HS shelf. The INV5000-HS
230V AC units have two INV2500-HS inverters connected in series in the
shelf. T wo or more INV5000-HS-230 inverters may be connected in parallel
for additional output power or for N+1 redundant operation. This is done by
connecting all inputs in parallel and all outputs in parallel (line, neutral, line),
although the DC inputs could come from two separate sources. In addition,
the sync terminals must be connected together, +Sync to + Sync and -Sync
to -Sync. The Sync terminals are used only for parallel connection of two or

13

J1

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

J1 Connector:

Positronics GFSH01M182

PIN FUNCTION

1 AC Line
2NC
3 AC Line
4NC
5 AC Neutral
6NC
7 AC Ground
8 AC Neutral

9NC
10 NC
11 NC

3 2 1

6 5 4
9 8 7

11 10

13 12

15 14

17 16

19 18

21 20

24 23 22

27 26 25

30 29 28

33 32 31

Mating Connector:

Positronics GFSH01F10
Contacts No. FC112N2 for
Pins 1, 3, 5, 7, 8, 25-28 and 30-33.
Conacts No. FC720N2 for
Pins 14-18.

J1 Connections

PIN FUNCTION

12 NC
13 NC
14 +Sync
15 -Sync
16 Form C: NC
17 Form C: C
18 Form C: NO
19 NC
20 NC
21 NC
22 NC

PIN FUNCTION

23 NC
24 NC
25 +DC In
26 -DC In
27 -DC In
28 +DC In
29 NC
30 -DC In
31 +DC In
32 +DC In
33 -DC In

NC = No Connection

Figure 8. Inverter Module Pin Connections

14

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

more inverters. Current sharing between paralleled inverters is ±10%.

13.2 Alternatively , separate sources may be used for the inputs to these inverters
while the outputs are connected in parallel. In either case, output loads
should have individual distribution circuit breakers. The following table shows
output current and total volt-amperes for inverters connected in parallel. As
mentioned earlier , INV5000-HS refers to both the 230V AC INV5000-HS-230
and two INV2500-HS inverters in an INVR2U-HS shelf producing 1 15V AC.

T able 13-1. Output For Paralleled Inverters

NO.OF INV2500-HS

INVERTERS

1 2.5 22
2 5.0 44
3 7.5 66
4 10.0 88

RATING

KVA

OUTPUT

AMPS

NO.OF INV5000-HS

INVERTERS

1 5.0 44 22
2 10.0 88 44
3 15.0 132 66
4 20.0 176 88

KVA

RATING

115VAC

AMPS

230VAC

AMPS

13.3 Four INV2500-HS inverters in two INVR2U-HS shelves connected in parallel

could be used to produce 10 kilovolt-amperes of 1 15V AC or could also be
used as a 3+1 redundant inverter providing 7.5 kilovolt-amperes of 1 15V AC to
a load.

13.4 Figure 9 shows four INV2500-HS inverter modules in two INVR2U-HS
shelves connected in parallel to give 10KV A of AC output at 1 15V AC. The AC
output is distributed by a DP AC1UT AC Distribution Panel made by UNIP­OWER T elecom. Note that only 1 15V AC inverters can be used with the
DP AC1UT distribution panel and not the 230V AC INV5000-HS-230. 230V AC
INV5000-HSs require breakers on both line sides, and this is not available
with the DP AC1UT . Note also that only the “T” (Terminal Strip) Option of the
DP AC1U can be used with these inverters and that, as shown in Figure 9,
the A side AC input terminals must be strapped in parallel, i.e., A1G to A2G,
A1N to A2N and A1L to A2L; in the same way , the B side AC input terminals
must also be strapped in parallel.

14.0 INST ALLA TION AND TESTING

14.1 The inverter or inverters should be initially tested in their shelves. For 23-inch

rack mounting use panel extenders.

14.2 Put all input and output circuit breakers in the off (down) position. See Figure

3. Remove the rear plastic safety cover .

14.3 Connect the input battery to the -48VDC and 48VDC Return input bus bars

15

AC OUTPUTS

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

Figure 9. T wo 1 15V AC INVR2U-HSs in Parallel Using AC Distribution Panel

INVR2U-HS INV5000-HS-230

Figure 10. Output Connections for Inverters

16

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

by means of the 1/4-20 studs. Connect the input ground (10-32 stud) to the
system ground. Make sure the correct polarity is used and make sure the
connections are clean and firm. Reversed input polarity could cause damage
to the inverter .

14.4 Connect the AC output cable to the proper output screw terminals. See
Figure 10 for the correct connection for 1 15 or 230V AC output versions.
Connect a load of approximately 10 amperes across the output of the inverter.

14.5 T o power up the inverter , turn the A side (left) DC input circuit breaker on by
moving the toggle to the up position. The A side fans and input OK and Sync
OK LEDs should come on followed by the Output OK LED approximately four
seconds later. After the Output OK LED is on, turn on the A side AC output
breaker by placing the toggle in the up position. Next, turn the B side (right)
DC input breaker on. The B side fans and Input OK and Sync OK LEDs
should come on followed by the Output OK LED approximately four seconds
later . After the Output OK LED is on, turn on the B side AC output breaker.
Check the AC voltage across the load with a digital AC voltmeter. The voltage
should be between 1 15 and 120V AC or between 230 and 240V AC, depend­ing on the model.

14.6 Check the Form C Relay contacts with an ohmmeter. See Figure 3. Measure
the resistance between the N.O. contacts and C contacts. They should
indicate an open. Measure the resistance between the N.C. contacts and the
C contacts. They should indicate a short.

14.7 Turn off the AC output circuit breakers first, followed by the DC input break­ers, by placing the toggles in the down position. T est each inverter in the
manner described above.

15.0 INVERTER APPLICA TION

15.1 In the actual application of the inverter, follow the procedure in sections 14.2

through 14.6, except the inverter should be connected to its actual load. The
loads connected to the output of the inverter should always have their own
individual circuit breakers. Make connections to the Form C relay contacts as
required. Then re-install the rear plastic safety cover .

15.2 For two or more inverters in parallel, make the input and output connections
to the inverters as described in Section 13.0. See Figure 9. Put all output
distribution circuit breakers in the off position. Connect the sync terminals
together observing proper polarity .

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15.3 T ake one of the inverter modules and turn the DC input circuit breaker on;
then after the Output OK LED has come on turn the AC output circuit breaker
on. This sequence must be performed for the inverter A side and then the B
side. Repeat this for each paralleled inverter in turn until all inverters are on.
Make sure that the three green LEDs are on for each inverter .

15.4 With all inverters on, turn on each AC output distribution circuit breaker. The
inverters will automatically share output currents to an accuracy of ± 10%.

16.0 REPLACING AN INVERTER MODULE

16.1 The following instructions are for replacing an INV2500-HS inverter module

in an INVR2U-HS shelf.

16.2 The inverter module may be field replaced only in an INVR2U-HS shelf, i.e.,
when it is parallel connected for 1 15V AC output. For the INV5000-HS-230
inverters, the replacement must be done at the factory due to the complexity
of the series connection of the inverter modules.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

16.3 When the INV2500-HS inverters are operated in a N+1 redundant mode, only

the inverter module being replaced needs to be turned off as described in the
following paragraphs. In this case it is true hot-swap replacement. If the
1 15V AC INVR2U-HS is operated with two modules at its full 5,000 volt­ampere load, then both modules should be shut down in the manner de­scribed in paragraph 16.4. When starting up after replacement, both inverter
modules must be turned on as described in paragraph 16.5.

16.4 Perform the following steps on the inverter module to be removed:

16.4.1 T urn off the AC output breaker (down position).

16.4.2 T urn off the DC input breaker (down position).

16.4.3 Remove the front retention panel by removing the four Phillips

screws.

16.4.4 Remove the inverter module from its shelf.

16.5 T o put a new inverter module in place, perform the following steps:

16.5.1 Make sure the input and output breakers of the new inverter

module are in the off (down) position.

16.5.2 Install the replacement inverter module in the shelf.

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16.5.3 Replace the front rention panel by replacing the four Phillips

16.5.4 T urn on the DC input breaker (up position).

16.5.5 After the Output OK LED comes on, turn on the AC output

16.5.6 All green LEDs on the inverter modules should now be on,

17.0 MAINTENANCE

No routine maintenance is required on the INV2500-HS or INV5000-HS Series
inverters except for a periodic cleaning of dust and dirt around the front fans and
rear ventilation holes. A small vacuum nozzle should be used for this.

INV2500-HS & INV5000-HS SERIES

OPERATING MANUAL

screws.

breaker (up position).

indicating normal operation.

18.0 TROUBLESHOOTING GUIDE

18.1 If you encounter difficulty in getting the inverter(s) to operate, go through the

following troubleshooting guide.

18.2 T able 18-1. Inverter Troubleshooting Guide
SYMPTOM POSSIBLE CAUSES ACTION TO TAKE

Input OK LED does Bad connection to input Check the connection to battery; check
not come on. battery; input breaker not battery voltage; check that input breaker is on.

on.

Sync OK LED does Bad connection to sync Check that sync connection has been made
not come on for terminals. to all paralleled inverters with proper polarity.

No AC output; Bad output connection; Check output connection to load; check that
Output OK LED output breaker not on. output breaker is on; check that AC
does not come on. distribution breakers are on.

No AC output. Short circuit or overload Remove short circuit or overload. Turn off
Output OK LED on output. input and output circuit breakers. Turn
is off. input circuit breaker back on, wait for the

No output. Both Input battery voltage is Check battery voltage. Recharge battery or
circuit breakers on. below range. install new battery. Turn the inverter back on.
Input and Output OK
LEDs off.

Output OK LED to come on, then turn the
output circuit breaker on.

18.3 If none of the above actions solves the problem, call UNIPOWER T elecom at

954-346-2442 Ext. 400 for help.

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