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2.3.3
Site preparation – electrical
Perform the following procedure before connecting any external cables to Power+.
1.
Verify that circuit breakers on the electrical board that supplies Power+ are compliant with local and
national codes and Gamatronic system specifications.
2.
Verify that the input and output power cable connections, GND, and neutral lines comply with local and
national codes and are appropriate for the circuit breakers protecting them.
3.
Measure the ac input voltage.
Phase-to-phase voltage (measured btwn L1-L2, L2-L3, and L3-L1) should be 3x400 Vac ±10 %.
Phase-to-neutral voltage (measured at L1, L2, and L3) should be 230 Vac, ±10 %.
4.
Verify that voltage between neutral and ground is between 0 and +2 Vac.
5.
Verify that the dc voltage at the switch of the battery cable is +360 V and -360 V.
6.
Verify that the proper ac and dc fuses (18 A ac and 20 A dc) are present for each phase in each
module.
7.
An external N.O. EPO switch may be connected according to connection schematic. EPO wiring and
switch must be rated for at least 1A / 24 Vdc. See section 2.4.3 for more information about the EPO
switch.
8.
FAST FUSES (SEMICONDUCTOR FUSES) must be used between the battery and the UPS.
For example, the Bussmann "FWH" fuse.
2.3.3.1
CIRCUIT BREAKER SELECTIVITY
CAUTION!
To reduce the risk of fire, connect the UPS only to a circuit provided with maximum
branch circuit over-current protection according to local codes.
See Chapter 6 "Circuit breaker selectivity" for information to assist you in chosing the most appropriate
circuit breakers to protect the UPS while providing optimal selectivity. See also Figure 7 and Figure 8 for
information regarding maximum expected input current and suggested input switch and circuit breaker
ratings.
6
G
E
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AMATRONIC
LECTRONIC
NDUSTRIES
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TD
Power + PREMIUM, Installation Guide, rel. 1.7
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