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Comet installation and user manual: E-6761200XT/FB
11.7Merlin Gerin by MGE UPS SYSTEMS
If the configuration includes the "separate Mains 2" option, the protection devices
recommended for Mains 1 and Mains 2 are the same as those of circuit breaker
CB1 in the table above for Comet series 11 and Comet series 33.
For Comet series 31, the recommended protection devices are given in the table
below:
Schematic diagram for protection devices ("separate Mains 2" option)
Comet Comet rated Merlin Gerin Merlin Gerin
output (kVA) circuit breaker CB1 circuit breaker CB1'
(Mains 1) (Mains 2)
series 31 5 C60N 10A (curve D) C60N 25A (curve D)
7,5 C60N 16A (curve D) C60N 40A (curve D)
10 C60N 20A (curve D) C60N 50A (curve D)
15 C60N 32A (curve D) NC100H 80A (curve D)
20 C60N 40A (curve D) NC100H 100A (curve D)
Note:
The breaking capacity of the protection devices must be greater than the
prospective short-circuit current.
Consult the Merlin Gerin Low Voltage Application Guide for further details.
Selection of the trip units for the circuit breakers installed upstream of the
transformers must take the inrush currents (10 to 14In) into account.
LV switchboard
CB2
CB2
Comet
Mains 1
Mains 2
CB1
CB1'