13EN
MASTERYS GP4 60-120 kVA - Ref.: IOMMASGPXX07-EN 01
4.1 ELECTRICAL REQUIREMENTS
NOTE!
Before carrying out any operations on the unit read the Safety standards chapter carefully.
The installation and system must comply with national plant regulations.
The electrical distribution panel must have a sectioning and protection system installed for input and auxiliary mains.
RCD is not necessary when the UPS is installed in a TN-S system.
RCD is not allowed on TN-C systems.
If a RCD is required a B-type should be used.
Size of input protection devices
Model
rating Breaker Input(1) Breaker Aux.
Mains(1)
Differential
input
Input/Output
cable core size(2)
Battery cable
core size Battery protection(4)
(kVA)
(A) (A) (A) (mm2) (mm2)
(A)
C D selective type Min Max(3) Min Max(3)
60 125 160 0.5 50 70 50 70 200
80 160 200 0.5 50 70 50 70 200
100 250 250 0.5 70 2x120 70 2x120 250
120 250 250 0.5 70 2x120 70 2x120 250(5)
1. Circuit breaker switch recommended with magnetic intervention threshold ≥10 In (curve C). It is necessary to use a D curve
selective breaker if an optional external transformer is used. The min value depends on the size of the power cables in the
installation, while the max value is limited by the UPS cabinet.
2. For parallel configuration, cables shall have the same size and length for each unit (maximum length tolerance is ±5%).
Output cables should be less than 25 metres.
3. Determined by the size of the terminals.
4. Tripole protection on external battery cabinet.
Recommended Fuse aR type or magneto-thermal switch (three poles with intervention threshold = 3 In suited for DC
applications).
5. Recommended Fuse 315A aR type for a battery cabinet with capacity exceeding 90 Ah.
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.
The phase rotation of aux mains and output cables must be the same for each unit.
NOTE:
- To ensure the integrity of the 60-80 kVA bypass thyristors, I2t must be lower than 120 kA2s and
peak current must be lower than 5 kA for 20 ms.
- To ensure the integrity of the 100-120 kVA bypass thyristors, I2t must be lower than 400 kA2s and
peak current must be lower than 9 kA for 20 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).