Delta Modulon DPH series - Page 9

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Important Safety Instructions
Non-Delta
External
Maintenance
Bypass
Cabinet
(User-supplied,
handled and
configured by
Delta service
personnel)
For configurations of the non-Delta external maintenance bypass
cabinet, please refer to the following.
a. Selection of three or four breakers (switches):
(1) Three breakers (switches):
An input breaker (switch), a manual bypass breaker (switch)
and an output breaker (switch) should be installed.
(2) Four breakers (switches):
An input breaker (switch), a bypass breaker (switch), a
manual bypass breaker (switch) and an output breaker
(switch) should be installed.
b. Each breaker (switch) mentioned above must be a 3-pole (R/ S/
T) device and meets the specifications defined in Table 5-3.
c. It is suggested that each breaker (switch) should be configured
with an auxiliary contactor. For relevant information, please refer
to 4.1.4 External Switch/ Breaker Status Dry Contacts.
d. Install the non-Delta external maintenance bypass cabinet next
to the UPS or align it with the UPS for convenient operation.
127(௓If there are switches but not breakers installed in the external
maintenance bypass cabinet, please install (1) an additional protective device
between the input power and the external maintenance bypass cabinet and (2)
an additional protective device between the connected critical loads and the
external maintenance bypass cabinet. The protective device could be a breaker
or a fuse. For the protective device’s rating current, please refer to the table
below.
200kVA 300kVA 400kVA 500kVA
400A 600A 800A 1000A
y In this user manual, the meaning of Q0, Q1, Q2, Q3, Q4 and Q5 represents the following.
Code Meaning
Q0 UPS’s Bypass Switch
Q1
Delta or non-Delta External Maintenance Bypass Cabinet’s Input Breaker
or Switch
Q2
Delta or non-Delta External Maintenance Bypass Cabinet’s Bypass Breaker
or Switch
Q3
Delta or non-Delta External Maintenance Bypass Cabinet’s Manual Bypass
Breaker or Switch
Q4
Delta or non-Delta External Maintenance Bypass Cabinet’s Output Breaker
or Switch
Q5 External Battery Cabinet’s Breaker