MGE UPS Systems Comet EX 11 RT 3:1 - Manual (Page 35)

34007724EN/AA - Page 35
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5. Appendices
5.1 Technical specifications
Electrical characteristics
I/T network and industrial operating modes
Bypass AC
Normal AC
Bypass AC
Normal AC
Upstream
circuit breaker
(not supplied) Downstream
circuit breaker
(not supplied)
Input
fuse Output
fuse
Upstream
circuit breaker
(not supplied) Downstream
circuit breaker
(not supplied)
Input
fuse Output
fuse
Upstream
circuit breaker
(not supplied)
Selection of protection devices
UPS unit with common Normal and Bypass AC inputs
Overload, and Bypass
AC source in tolerance.
Overload, and Bypass
AC source not in tolerance.
Output short circuit and
Bypass AC source in
tolerance.
Output short circuit and
Bypass AC source not in
tolerance.
I/T network mode
Load is transfered to Bypass AC source.
UPS returns to normal mode if overload released.
The UPS shuts down and load is not transfered to
Bypass AC source.
The load remains powered by the UPS.
The UPS shuts down after 3 minutes if the short
circuit remains.
The load remains powered by the UPS. The UPS
shuts down after 3 minutes if the short circuit
remains.
Industrial mode
Same as I/T network mode, but the UPS does not
return to normal mode if overload released.
Load is transfered to Bypass AC source with 10
milliseconds output break. The UPS does not return to
normal mode if overload released.
Load is transfered to Bypass AC source, the UPS
returns to normal mode if the short circuit is released
by downstream circuit breaker action (see section 2.6).
The load is transfered to Bypass AC source with 10
milliseconds output break. The UPS does not return to
normal mode if the short circuit is released by
downstream circuit breaker action (see section 2.6).
UPS unit with separate Normal and Bypass AC inputs
When sizing the upstream circuit breakers, the parameters presented below must be taken into account:
Line current values
Continuous current
at 400/320 Volts and
nominal load
9/10 A
10/11 A
15/19 A
UPS
power rating
5 kVA
7 kVA
11 kVA
Continuous current at 320 Volts
and overload = 110 %
limited to 2 minutes
11 A
12 A
21 A
Input fuse rating
25 A
25 A
30 A
Output fuse rating
80 A
80 A
100 A
Discrimination of upstream/downstream protections mentioned in paragraph 2.6 is achieved for a 30 m cable length and
10 mm
2 cross section.
Circuit breaker capacity must be selected according to the installation, length and cross section of cables.
Normal AC
source circuit
breaker
Normal AC
source circuit
breaker