JALpower JP9950, User Manual

Page: 12 / 63

12
SETTING UP THE INPUT/OUTPUT WIRE CONNECTION
PROTECTIONS
Inside the UPS
The size of the switches and fuses installed on the UPS input/output lines are given below (consult the block
diagrams paragraph for the initial). A fuse must always be replaced by a fuse of the same capacity and with
the same characteristics as those mentioned in the table.
UPS: 60-200KVA
Internal
protection
UPS
Typ
e
Breakers Breakers Battery fuses
STS fuses
Max current . Output
current
[kVA] Input rectifier Bypass
input SWOUT/
SWMB
Battery [A] [A]
SWIN SWBY SWOUT/SWMB FUSE-BAT FUSE-SCR Nominal
60 100A(3P) type C 100A(3P) type
C 100A(3P) type C
160A
32A (gG)
10x38
108 72
80 125A(3P) type C 125A(3P) type
C 125A(3P) type C
200A
32A (gG)
10x38
144 96
100 200A(3P) type C 200A(3P) type
C 200A(3P) type C
280A
200A
180 120
120 225A(3P) type C 225A(3P) type
C 225A(3P) type C
320A
250A
216 144
160 250A(3P) type C 250A(3P) type
C 250A(3P) type C
400A
300A
400A
288
360
192
240
200 350A(3P) type C 350A(3P) type
C 350A(3P) type C
500A 400A 360A 240A
UPS:250-400KVA
Internal
protection
UPS
Typ
e
Breakers Breakers Breakers
STS fuses
Max current Output
current
[kVA] Input rectifier Bypass
input
SWOUT/SWMB Battery [A] [A]
SWIN SWBY SWOUT.SWMB SWBAT FUSE-SCR
Nominal
250 400A(3P) 400A(3P) 400A(3P) 630A(2P) 400A 400 300
300 630A(3P) 630A(3P) 630A(3P) 6300A(2P) 630A 480 360
350 630A(3P) 630A(3P) 630A(3P) 630A(2P)
800A(2P)
630A
630A
560
640 420
480
400 630A(3P) 630A(3P) 630A(3P) 800A(2P) 630A 640 480
UPS Input.
When selecting the protections to install at the input of the continuity group, you must take into consideration
the maximum current absorbed in the two operating conditions:
In "NORMAL OPERATION", from the main line via the rectifier, the “max input current” is the one
indicated in the table. The automatic breaker is present at the rectifier input, as shown in the table,
"SWIN".
In "BY-PASS OPERATION", straight from the by-pass line, the max. value of the current is restricted by
intervention of the “automatic breaker SWBY”.
UPS output, Short circuits and selectivity
Nominal current, Input/output from the UPS is the one indicated in the table "output current".
Short circuit
When a fault occurs on the load, i.e. a short circuit, the UPS protects itself by restricting the value and the
duration of the supplied current (short circuit current). These values also depend on the operating status of
the unit at the time of the fault. We must distinguish between two situations: