INV2500 and INV5000
TELECOM INVERTERS
OPERA TING MANUAL
PRICE: $25.00
Manual No. INV-700-2
12/04/01 INV2500/5000-Man
www.unipowertelecom.com
© 2001 UNIPOWER Corp.
All Rights Reserved
UNIPOWER T elecom, Division of UNIPOWER Corporation
NORTH AMERICA • 3900 Coral Ridge Drive, Coral Springs, Florida 33065, USA • Tel: +1 954-346-2442 • Fax: +1 954-340-7901 • sales@unipower-corp.com
EUROPE • Parkland Business Centre, Chartwell Road, Lancing BN15 8UE, ENGLAND • Tel: +44(0)1903 768200 • Fax: +44(0)1903 764540 • info@unipower-europe.com
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 8
13.0 Parallel Operation 1 3
14.0 Installation and Testing 15
15.0 Single and Multiple Inverter Application 17
16.0 Replacing An Inverter 18
17.0 Maintenance 19
18.0 T roubleshooting Guide 20
ILLUSTRATIONS
FIGURE TITLE PAGE
1 INV2500 and INV5000 Models 2
2 Front & Back of INV2500 6
3 Front & Back of INV5000 6
4 Mechanical Dimensions of Shelves 9
5 INV2500 Inverter Output Waveforms 1 1
6 INV2500/INV5000 Overload Characteristic 12
7 Connections for ORing Form C Relay Outputs on INV5000 12
8 INV2500 Series Inverters Connected in Parallel 14
9 Four INV2500s in Parallel Using AC Distribution Panel 14
10 Two 1 15V AC INV5000s in Parallel Using AC Distribution Panel 16
1 1 Output Connections for INV5000 16
INV2500 AND INV5000 TELECOM INVERTERS
1.0 INTRODUCTION
1.1 This Operating Manual should be read through carefully before installing and
operating the INV2500 or INV5000 Series inverters.
1.2 The INV2500 is a 2500 volt-ampere telecom inverter which converts a nominal 48VDC input into a 1 15V AC output at 60Hz. The INV5000 is a 5000V A
inverter which converts a nominal 48VDC input into 1 15 or 230V AC at 60Hz
or 230V AC at 50Hz. The INV2500 comes as a single, stand-alone unit. A 19inch compatible shelf which can also be mounted in a 23-inch rack and holds
one or two INV2500s is also available. The INV5000 comes in a 19-inch
shelf which can also be mounted in a 23-inch rack. Both the INV2500 and
INV5000 are two mounting positions (3.5 inches) high. See Figure 1.
INV2500 & INV5000 SERIES
OPERATING MANUAL
OPERA TING MANUAL
1.3 The 48VDC nominal input has a range of 42 to 56VDC, and full load output
is 1 15V AC at 22 amperes RMS for the INV2500. For the INV5000 the output
is 1 15V AC at 44 amperes RMS or 230V AC at 22 amperes RMS. The inverters achieve 90% efficiency and 7V A per cubic inch power density . Input and
output are both circuit breaker protected. The inverters 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.
1.4 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 and
INV5000 inverters:
u Two Mounting Positions High: 3.5 Inches
u 2500VA Output for INV2500
u 5000VA Output for INV5000
u 7VA per Cubic Inch Power Density
u 115V AC Output at 22 or 44 Amperes
u 230VAC Output at 22 Amperes
1
(a). INV2500 Inverter
INV2500 & INV5000 SERIES
OPERATING MANUAL
(b). INV5000 Inverter
Figure 1. INV2500 and INV5000 Inverter Models
2
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 Mating Connector Kit with INV2500
u Rear Safety Cover on INV5000
3.0 PRODUCT LINE
INV2500 & INV5000 SERIES
OPERATING MANUAL
T able 3-1 T elecom Inverter
MODEL INPUT OUTPUT FREQ.
INV2500 48VDC 115V AC@22A 60Hz
INV5000-115/60 48VDC 115VAC@44A 60Hz
INV5000-230/50 48VDC 230V AC@22A 50Hz
INV5000-230/60 48VDC 230V AC@22A 60Hz
T able 3-2 Inverter Shelf (for INV2500)
MODEL SIZE HEIGHT CAP ACITY
INVR2U 19 inches 2U (3.5 Inches) 2 INV2500s
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.
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).
3
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 & INV5000 SERIES
OPERATING MANUAL
6.0 UNP ACKING AND INSPECTION
6.1 This INV2500 or INV5000 was carefully tested, inspected and packaged 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 rectifier
system 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.
6.4 Always save the packing materials for later use in shipping the unit. Never
ship the rectifier system without proper packing.
4
7.0 DESCRIPTION OF OPERA TION
7.1 The INV2500 and INV5000 Series employ MOSFET and IGBT power semi-
conductor 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 inverters operate in parallel with their outputs in phasesynchronization and current shared.
7.2 The INV5000 consists of two INV2500s operated in parallel for 1 15V AC
output or operated in series for a 230V AC output. The parallel or series
connection of the units is made internally . Each of the two inverters has its
own input and output breakers, indicator LEDs and Form C relay contacts.
8.0 FRONT AND BACK P ANEL DESCRIPTIONS
INV2500 & INV5000 SERIES
OPERATING MANUAL
8.1 Figure 2 shows the front and back of an INV2500. On the left side of the front
panel of the INV2500 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 back panel at the upper left is the sync terminal which is a
BNC connector. Below that is a no. 8-32 stud and nut for chassis ground
connection, then a 3-terminal Type 602 Spring Con connector for easy connection of wires to the Form C Relay contacts. Below this are three Anderson-Type connectors for the AC output (top to bottom): green (ground), white
(neutral) and black (line). On the right side of the inverter are three larger
Anderson connectors for the DC input. From top to bottom they are: green
(ground), red (DC Return) and black (-48V Input).
8.3 Figure 3 shows the front and back of an INV5000. Each front half (side A or
side B) of this inverter has an identical layout to the INV2500. The back panel
has a transparent plastic safety cover.
8.4 On the INV5000 back panel to the left are the AC output screw terminals. At
the center are the Form C relay contacts N.O., C and N.C. for each side (A
and B) of the inverter . Below these is the BNC sync connector. To the right
are the input bus bars with no. 1/4-20 studs. At the far right is the no. 10-32
stud chassis ground connection.
5
INV2500 & INV5000 SERIES
OPERATING MANUAL
INV2500 FRONT VIEW
ä
ä
ä
ä
INPUT OK
SYNC OK
OUTPUT OK
INPUT BREAKER ä
CHASSIS
GROUND
FORM C
RELAY
CONTACTS
AC
OUTPUT
{
N.O.
{
N.C.
G (GRN)
N (WHT)
L (BLK)
C
3.32
(84.3)
ä
ä
OUTPUT BREAKER
ä
8.50
(216)
ä
INV2500 BACK VIEW
SYNC
ä
ä
ä
ä
ä
ä
ä
GND (GRN)
ä
RTN (RED)
ä
-48V (BLK)
}
DC
INPUT
Figure 2. Front and Back of INV2500
INV5000 FRONT VIEW
A SIDE B SIDE
ä
ä
18.32
(465)
INV5000 BACK VIEW
Figure 3. Front and Back of INV5000
6
3.46
(87.9)
ä
ä
INV2500 & INV5000 SERIES
OPERATING MANUAL
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.
INV2500 INV5000-230INV5000-115
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........................ *
EMI Filter, Conducted .......................................... * ..................... FCC2078 pt.15J Curve A .................... *
EN55022 Curve A
Voice Band Noise/ A-H Battery ................<32dBrnC/240 ..................<32dBrnC/480.................. <32dBrnC/480
OUTPUT
Voltage, Full Load .......................................... 115VAC ............................ 115VAC ............................ 230VAC
Voltage, No Load...........................................120VAC ............................ 120VAC............................ 240VAC
Current, Max. ................................................22A RMS..........................44A RMS.......................... 22A RMS
Frequency, ± 0.1%........................................... 60Hz..................................60Hz ............................ 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..........................*
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..................................... 3.32 H x 8.50 W x 12.00 D
(84.3 x 216 x 305)
INVR2U Shelf ........................... 3.46 H x 18.32 W x 12.44 D
(87.9 x 465 x 316)
INV5000 with Rear Cover .....................................................3.46 H x 18.32 W x 18.00 D .................. *
(87.9 x 465 x 457)
Rack Mounting Width ......................................* ............................ 19 or 23 Inches............................ *
7
10.0 MECHANICAL DIMENSIONS OF SHEL VES
Figure 4 shows the mechanical specifications for the INVR2U shelf and the
INV5000 in its shelf. The INVR2U is 12.44 inches (316mm) deep; the INV5000
shelf is 18.00 inches (457mm) deep with its rear cover or 16.38 inches (416 mm)
deep without the rear cover .
1 1.0 SAFETY AND INDUSTRY ST ANDARDS
1 1.1 The INV2500 and INV5000 inverters meet the following safety certifications:
ST ANDARD AGENCY
UL1950 UL
CSA22.2 No.950 CUL
EN60950 DEMKO
INV2500 & INV5000 SERIES
OPERATING MANUAL
11.2 The INV2500 and INV5000 inverters are CE marked to indicate conformance
to the European Union’s Low V oltage 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 an INV2500 with a 240
ampere-hour battery or an INV5000 with a 480 ampere-hour battery .
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 INV2500 are to Anderson
type connectors, no. 5916 with 5952 contacts. Input connections on the back
of the INV5000 are to bus bars with no. 1/4-20 studs.
12.2 Output V oltage. The output voltage for an INV2500 is 1 15V AC at full load;
for an INV5000 it is 1 15 or 230V AC at full load. See Figure 5(a). For zero load
the output voltage is 120 or 240V AC. 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 Anderson no. PP15/45 with 261G2 contacts for the INV2500 and screw
8
INV5000
SHELF
INV2500 & INV5000 SERIES
OPERATING MANUAL
INVR2U
SHELF
17.38
(441)
ä
18.32
(465)
Figure 4. Mechanical Dimensions of Shelves
ä
3.46
(87.9)
ä
ä
9
INV2500 & INV5000 SERIES
OPERATING MANUAL
terminals for the INV5000.
12.3 Output Power. Maximum output power for an INV2500 is 1 15V AC at 22A
RMS giving a maximum of 2530 volt-amperes. For an INV5000 it is 1 15V AC
at 44A or 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%.
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 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 and INV5000. 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 and INV5000 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 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 breakers(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 the
inverter . 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
10
INV2500 & INV5000 SERIES
(a) Full Load Step. V o (top) & Io (bot@20A/cm).
OPERATING MANUAL
(b)Sudden Overload Applied. V o (top) & Io (bot @ 50A/cm).
(c) Short Circuit Applied. V o (top) & Io (bot @50A/cm).
Figure 5. INV2500 Inverter Output Waveforms
11
INV2500 & INV5000 SERIES
OPERATING MANUAL
01020304050607080
0 20 40 60 80 100 120 140 160
OUTPUT RMS Amperes
INV2500 or 230VAC INV5000
115V AC INV5000
Figure 6. INV2500/INV5000 Overload Characteristic.
(a) Normally Open (b) Normally Closed
Figure 7. Connections for ORing Form C Relay Outputs on INV5000
12
normally closed (N.C.) positions for normal operation of each inverter . See
Figures 2 and 3 for connections. Note that for the INV5000 there is a separate set of contacts for each half (A and B sides) of the inverter . If it is desired
to monitor the INV5000 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 Connector Kit. A complete Mating Connector Kit (No. 775-1438-0000) is
supplied with each INV2500. Each kit contains Anderson mating input and
output connectors, a 12-inch cable with BNC connectors and a BNC tee
adaptor.
13.0 P ARALLEL OPERA TION
13.1 The INV2500 and INV5000 Series inverters are designed to operate in paral-
lel for higher output current. This is done by connecting all inputs in parallel
and all outputs in parallel, although the DC inputs could come from two
separate sources. In addition, the sync terminals must be connected together
by means of a cable with BNC connectors. The sync terminal is used only for
parallel connection of two or more inverters. See Figure 8. For more than two
inverters, BNC tee adaptors are required. Current sharing between paralleled
inverters is ±10%.
INV2500 & INV5000 SERIES
OPERATING MANUAL
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.
T able 13-1. Output For Paralleled Inverters
NO.OF INV2500
INVERTERS
1 2.5 22
2 5.0 44
3 7.5 66
4 10.0 88
KVA
RATING
OUTPUT
AMPS
NO.OF INV5000
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 Figure 9 shows four INV2500s connected in parallel to give 10KV A of AC
output.The units are connected to a Unipower T elecom DP AC1U AC Distribution Panel which distributes power to as many as eight AC circuits, each
protected by a circuit breaker. Note that for each INV2500 the input ground,
output ground, chassis ground and AC neutral output are all connected in
common inside the inverter . Contact Unipower T elecom for a data sheet on
the DP AC1U or see www.unipowertelecom.com.
13
INV2500 & INV5000 SERIES
OPERATING MANUAL
INV2500
INV2500
Figure 8. INV2500 Series Inverters Connected in Parallel
Figure 9. Four INV2500s In Parallel Using AC Distribution Panel.
14
13.4 Figure 10 shows two INV5000s connected in parallel to give 10KV A of AC
output at 1 15V AC. Note that only 1 15V AC INV5000s can be used with the
DP AC1UT distribution panel and not the 230V AC INV5000s. 230V AC
INV5000s require breakers on both line sides, and this is not available with
the DP AC1UT . As with the INV2500, the input ground, output ground, chassis ground and AC neutral are all connected in common inside the INV5000
inverter . Note also that only the “T” Option of the DP AC1U can be used with
the INV5000 inverters and that as shown in Figure 10, 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 may be initially tested either in a rack or on a bench.
For 23-inch rack mounting use panel extenders.
INV2500 & INV5000 SERIES
OPERATING MANUAL
14.2 Put both input and output circuit breakers in the off (down) position. See
Figure 3. For the INV5000, remove the rear safety cover.
14.3 For the INV2500, connect the input battery -48VDC and Return terminals to
the inverter input red and black terminals, respectively , by means of the
Anderson connectors (no. 5916 housings with no. 5952 contacts). Connect
the input ground (green connector) and chassis ground to the system
ground. For the INV5000, connect the input battery to the -48VDC and
48VDC return input bus bars 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 Anderson connectors on the INV2500 are
seated all the way in. Reversed input polarity could cause damage to the
inverter.
14.4 For the INV2500, connect a three-wire AC output cable to the AC output line
(black), neutral (white) and ground (green) terminals by means of the Anderson connectors (no. PP15/45 housings with no. 261G2 contacts). For the
INV5000, connect the AC output cable to the proper output screw terminals.
See Figure 1 1 for the correct connection for 1 15 or 230V AC output versions.
Connect a load of approximately 10 amperes across the output of the
INV2500 or INV5000.
14.5 T o power up the INV2500, turn the DC input circuit breaker on by moving the
toggle to the up position. The fans and Input OK and Sync OK LEDs should
15
AC OUTPUTS
INV2500 & INV5000 SERIES
OPERATING MANUAL
Figure 10. T wo 1 15V AC INV5000s in Parallel Using AC Distribution Panel
Figure 11. Output Connections for INV5000
16
INV2500 & INV5000 SERIES
OPERATING MANUAL
come on followed by the Output OK LED approximately four seconds later .
After the Output OK LED is on, turn on the AC output circuit breaker by
placing the toggle in the up position. Check the AC voltage across the load
with a digital AC voltmeter . The voltage should be between 1 15 and 120VAC
depending on the amount of load.
14.6 T o power up the INV5000, 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.
14.7 Check the Form C Relay contacts with an ohmmeter. See Figure 3. Measure
the resistance between the N.O. contact(s) and C contact(s). It (they) should
indicate an open. Measure the resistance between the N.C. contact(s) and
the C contact(s). It (they) should indicate a short.
14.8 Turn off the AC output circuit breaker(s) first, followed by the DC input
breaker(s), by placing the toggles in the down position. T est each inverter in
the manner described above.
15.0 SINGLE AND MUL TIPLE INVERTER APPLICA TION
15.1 In the actual application of the INV2500 or INV5000 inverter, follow the proce-
dure 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 as shown in Figure 8. Make
connections to the Form C relay contacts as required. Then, for the INV5000,
re-install the rear safety cover .
15.2 For two or more INV2500s or INV5000s in parallel, make the input and
output connections to the inverters as described in Sections 14.3 and 14.4.
See Figures 3, 9 and 10. Put all output distribution circuit breakers in the off
position. Connect the sync terminals together with BNC connectors and
cables. For more than two inverters in parallel, one or more BNC tee adapters will be required.
17
15.3 T ake one of the inverters 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 INV5000 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
16.1 T o replace an INV2500 or INV5000 inverter while it is operating in parallel
with other inverters in an N+1 redundant configuration, go through the following steps.
INV2500 & INV5000 SERIES
OPERATING MANUAL
16.2 CAUTION: This replacement must be done carefully and only by a qualified
technical person who is trained in the use of power systems. During this
replacement, the DC input and AC output terminals are hot. Only the
insulated connector housings should be touched on the INV2500. For the
INV5000, a nut driver with insulated handle should be used to disconnect the
DC input. Be careful not to touch any of the metal contact terminals.
16.3 Perform the following steps on the inverter to be removed:
16.3.1 Turn off the output breaker(s) (down position).
16.3.2 Turn off the input breaker(s) (down position).
16.3.3 Disconnect the sync BNC connector and the Form C relay
contact wires.
16.3.4 Carefully disconnect the DC input connections (these are still
hot!)
16.3.5 Disconnect the AC output connections.
16.3.6 Remove the inverter from its shelf, rack or other mounting.
16.4 T o put a new inverter in place, perform the following steps:
16.4.1 Make sure the input and output breakers of the new inverter are
in the off (down) position.
18
INV2500 & INV5000 SERIES
OPERATING MANUAL
16.4.2 Install the replacement inverter in the shelf, rack or other
mounting.
16.4.3 Reconnect the AC output connections.
16.4.4 Carefully reconnect the DC input connections (these are hot!)
See CAUTION in paragraph 16.2.
16.4.5 Reconnect the sync BNC connector and the Form C relay
contact wires.
16.4.6 Turn on the DC input breaker (A side breaker for INV5000).
16.4.7 After the Output OK LED comes on, turn on the AC output
breaker (A side breaker for the INV5000).
16.4.8 For the INV5000, next turn on the B side DC input breaker.
17.0 MAINTENANCE
No routine maintenance is required on the INV2500 or INV5000 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.
After the Output OK LED comes on, turn on the B side AC
output breaker .
19
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; check the BNC
paralleled inverters. connectors.
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.
INV2500 & INV5000 SERIES
OPERATING MANUAL
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.
20
Loading...