14 EN
MASTERYS GP4 60-160 kVA - Ref.: IOMMASGPXX07-EN 05
4.3 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.
Residual Current Detection (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
In/Out
phase
Model rating Input Mains Breaker
(1)
Aux Mains Breaker
(1)
Differential input Battery protection
(4)
(kVA)
(A)
A B Selective type Fuse type aR
3/3
60 125 160 0.5 160
80 160 200 0.5 200
100 250 250 0.5 250
120 250 250 0.5 315
160 315 400 0.5 400
Cable core size
(2)
In/Out
phase
Model rating Input Auxiliary Output Battery
(kVA)
(mm
2
)
Max
(3)
3/3
60 70 (M8) 70 (M8) 70 (M8) 70 (M10) M10
80 70 (M8) 70 (M8) 70 (M8) 70 (M10) M10
100 2 x 120 (M10) 2 x 120 (M10) 2 x 120 (M10) 2 x 120 (M10) M10
120 2 x 120 (M10) 2 x 120 (M10) 2 x 120 (M10) 2 x 120 (M10) M10
160 2 x 150 (M10) 2 x 150 (M10) 2 x 150 (M10) 2 x 150 (M10) M10
M8 terminals Tightening torque 20 Nm
M10 terminals Tightening torque 40 Nm
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.
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 values to avoid unwanted tripping with UPS at full power, minimum battery voltage and backup time of at
least 5 min. Recommended Rapid fuse type or thermal-magnetic circuit breaker with intervention threshold = 3 In suited for
DC applications.
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.
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