INV2500-HS SERIES
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 INV2500H-HS. Below is a table that shows the same data in a dif-
ferent format:
Table 12-1. Typical Load Current vs. Shutdown Time
As the table shows, the INV2500-HS is 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 re-
set 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.
It should be noted that in the standard INV2500-HS models, both AC
ground and AC neutral are connected to case ground. For INV2500-HS Option E ver-
sions and INV2500H-HS models, AC neutral is floating and must be externally connect-
ed to system ground. In both versions the DC input terminals are both floating.
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 at the rear of the shelf have normally open
(N.O.) and normally closed (N.C.) positions for normal operation of each inverter mod-
ule. See Figure 3 for connections. Note that there is a separate set of contacts for each
module (A and B sides) of the inverter system. If it is desired to monitor the inverter
system 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 mat-
ing connector and the pin connections given in Figure 8.
11
PERCENT OF
RATED LOAD
SHUTDOWN
TIME
114-173%
10 sec.
172-223%
1 sec.
223 - 318%
0.25 sec.
