Delta HPH-100K, User Manual, Page: 36 / 80

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Ultron HPH Series UPS
6.5 Wiring
6.5.1 Precautions Prior to Wiring
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the UPS by yourself, installation must be under the supervision of authorized Delta engi-
neers or service personnel.
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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.
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When connecting the UPS to the utility AC power, you must install input protective devices
and follow the safety regulation (EN 62040-1) to protect your installation against potential
backfeed energy flowing from the UPS to the input. To meet the safety regulation (EN
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breakers or contactors. Current rating of the shunt-trip circuit breakers or contactors has
to be equal to or larger than the current rating of the circuit breakers shown in the table
below. For contactors, coil voltage shall be supplied from the input voltage. For shunt-trip
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to control the circuit breakers’ shunt-trip function. For all options of backfeed protection,
please contact qualified service personnel. For installation of the protective devices,
please refer to
Figure 6-9~6-14 .
UPS Suggested Protective Device
60kVA D-Curve 125A Circuit Breaker
80kVA D-Curve 160A Circuit Breaker
100kVA D-Curve 200A Circuit Breaker
120kVA D-Curve 225A Circuit Breaker
NOTE:
Regarding Figure 6-9~6-14
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the TN system and a 3-pole protective device is installed between the UPS and
the utility AC power. If your utility AC power is the TT system, please install a 4-pole
protective device between the UPS and the utility AC power.