page 14 / 75 0MNA080A55-GB REV 01
- table of connections-
100kVA 120kVA 160kVA 200kVA 250kVA
Power line
Imax (*) [A]
145
173
229
288
359
External fuse type gG [A]
160
200
250
315
400
BYPASS (**)
Current [A]
145
173
231
289
361
External fuse type gG [A]
160
200
250
315
400
OUTPUT
Current [A]
145
173
231
289
361
BATTERY
Permanent battery eq. Current [A]
200
240
320
400
495
(*)100% load, minimum input voltage, battery charging; (**) inside the UPS, no max. current protection device is provided on
the by-pass line, this protection must be provided in the system;
3.1.2 Selectivity
The system where the UPS is inserted must be set up in such a way that in the event of a shortcircuit on one of the
lines downstream of the UPS, the fuse on the output will be triggered rather than the fuse located at the UPS input.
This is known as selectivity, and ensures that the remaining feeders maintain the power supply.
In order to select the correct protection devices to be inserted downstream of the SENTRY MPS-HP, the following
two operating modes have to be taken into consideration:
mains power supply
and
battery power supply
.
With
mains power supply
the output fuse must be selective with the input fuse; the condition is verified for the
following values:
100kVA 120kVA 160kVA 200kVA 250kVA
rated output current: [A]
145
173
231
289
361
type gG fuse used at the UPS input
(as shown in the
table of connections
) [A]
160 200 250 315 400
maximum fuse at the UPS output for selectivity:
fuse size for type gG fuse [A]
100
125
160
200
250
fuse size for type aM fuse [A]
63
80
125
125
160
At least two feeders are necessary in order to use the UPS at rated load with fuses of type gG.
UPS
F
H
