15EN
MASTERYS BC+ 10-40 kVA - Ref.: IOMMASBCXX0G-EN 00
CAUTION: Residual Current Detection (RCD) can only be used in the case of a common input
and auxiliary mains (configuration not recommended). It has to be placed upstream of the
connection between input mains and auxiliary mains. If RCD is installed the trigger value must be
0.5 A multiplied by the number of units connected in parallel.
Use type B four-pole selective (S) residual current detectors. Load leakage currents are to be
added to those generated by the UPS and during transitory phases (power failures and power
returns) short current peaks may occur. If loads with high leakage current are present, adjust
the residual current protection. It is advisable in all cases to carry out a preliminary check on the
earth current leakage with the UPS installed and operational with the definitive load, so as to
prevent the RCD tipping over.
NOTE:
To ensure the integrity of the 10-15-20 kVA 3/1 bypass thyristors, I
2
t must be lower than 14400
A
2
s and peak current must be lower than 2.4 kA for 10 ms.
To ensure the integrity of the 10-15-20 kVA 3/3 bypass thyristors, I
2
t must be lower than 7200 A
2
s
and peak current must be lower than 1.2 kA for 10 ms.
To ensure the integrity of the 30-40 kVA 3/3 bypass thyristors, I
2
t must be lower than 15000 A
2
s
and peak current must be lower than 2 kA for 10 ms.
Contact SOCOMEC for detailed information.
The UPS is designed for transient overvoltages in category II installations. If the UPS is part of
the building’s electrical circuit, or is likely to be subject to transient overvoltages in category
III installations, additional external protection must be provided, either on the UPS or in the AC
power supply network powering the UPS.
The UPS is designed for indoor environmental service conditions according to IEC 60721-3-3
with pollution degree lower or equal to 2 (non-conductive pollution).
WARNING: as specified in 62040-3 Appendix 3: Non-linear Load Reference, in the event of three-
phase non-linear loads connected downstream of the UPS, the neutral current on the load can
be 1.5 - 2 times higher than the phase current. This must be considered when estimating the
correct size of the output and the auxiliary neutral cables.
The max. non linear load admitted per phase is 8 kVA.
WARNING: protective earthing conductor (PE) must have sufficient current-carrying capacity.
The PE cable core size must be chosen according to the PROTECTIVE CURRENT RATING of the
earth circuit which depends on the provision and location of protective overcurrent devices.
NOTE: 3-Phase 4-Wire Input Power is required.
The unit can be installed in TN-C, TN-S, TT and IT AC distribution systems (IEC 60364-3).
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