Bypass Ac Source - MGE UPS Systems Galaxy PW 30 kVA Installation Manual

Characteristics (cont.)

Bypass AC source

The parameters given in the table
opposite can be used to determine the
required rating of the upstream
protective circuit breaker on bypass AC
input.
Important:
It is essential to choose the type of
circuit breaker for bypass AC input
according to its breaking capacity and
the prospective short-circuit current at
its place of installation (see Schneider
Electric LV documentation).
This choice must also be made so as to
protect the static-switch
semiconductors with respect to the
maximum permissible currents (see
table opposite) and ensure
discrimination between the UPS output
fuses (see the fuse curves in figures 1
and 2) and the downstream protection
devices.
Remark:
If the installation includes a transformer
on the bypass AC input, allow for the
inrush current caused by magnetisation
of the transformer windings.
6 -
E-51028231XU/BH
Electrical parameters for bypass AC source (415 V)
Rated UPS Current bypass AC source (1)
output in kVA Rated current
In
20 29
30 43
40 58
50 72
60 87
80 116
100 144
120 174
160 231
200 289
(1) the bypass AC source currents have been
determined for a rated phase-to-phase voltage of
400 V, a load power factor of 0.8 and for full rated
load as well as overloads of 25% or 50%. When
choosing the circuit breaker rating, use the "rated
current" column and check that the circuit breaker
tripping curves are compatible with the data in the
overload columns.
UPS output
in kVA
20
30
40
50
60
80
100
120
160
200
Galaxy PW 20 - 30 - 40 kVA
t(s)
10 4
3
10
10 2
10 1
1
1
10-
2
10-
10- 3
4
10-
2 3 4
10 10 10
Fig. 1
Galaxy PW 80 - 100 - 120 kVA
t(s)
4
10
10 3
2
10
1
10
1
1
10-
2
10-
3
10-
4
10-
2 3 4
10 10 10
Fig. 2
for 25%
overload
36
53
73
90
108
145
180
218
289
362
For a bypass AC source voltage of 380 V, multiply
the currents indicated in this table by 1.09.
For a bypass AC source voltage of 400 V, multiply
the currents indicated in this table by 1.04.
Maximum permissible current
43 In for 20 ms
29 In for 20 ms
21 In for 20 ms
20 In for 20 ms
16 In for 20 ms
27 In for 20 ms
21 In for 20 ms
18 In for 20 ms
23 In for 20 ms
19 In for 20 ms
Galaxy PW 50 - 60 kVA
t(s)
10 4
3
10
10 2
10 1
1
1
10-
2
10-
10- 3
4
10-
2 3
I(A) 10 10
Galaxy PW 160 - 200 kVA
t(s)
4
10
3
10
2
10
1
10
1
10- 1
10- 2
3
10-
4
10-
I(A) 2 3
10 10
for 50%
overload
43
64
87
108
130
174
216
261
347
434
4
10 I(A)
4
10 I(A)