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Ultron HPH Series UPS
5.5 Wiring
5.5.1 Precautions Prior to Wiring
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Before wiring or making any electrical connection, make sure the power supplied to the
input and output of the UPS is completely cut off and the internal and external batteries
are completely disconnected.
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When connecting the UPS to the utility AC power and bypass source, protective devices
and 4-pole contactors must be installed. The protective devices and 4-pole contactors
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below for suggested protective devices. For the installation of the protective devices and
4-pole contactors, please see
Figure 5-9, 5-10, 5-12
and
5-13
.
UPS
Suggested Protective Device
20kVA
D-Curve 75A circuit breaker
30kVA
D-Curve 125A circuit breaker
40kVA
D-Curve 150A circuit breaker
60kVA
D-Curve 225A circuit breaker
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between them. Refer to the table below.
UPS
Suggested 3-Pole Circuit Breaker
20kVA
C-Curve 75A circuit breaker
30kVA
C-Curve 125A circuit breaker
40kVA
C-Curve 150A circuit breaker
60kVA
C-Curve 225A circuit breaker
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Check that the size, diameter, phase, and polarity of each cable connecting to the UPS is
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refer to
Table 5-1
.
