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24 Guidelines for planning electrical installation
Implementing an interlocking for the DC
switch/disconnector (option +F290)
Unit equipped with DC switch/disconnector ([Q11], option +F290): User must connect
an external power supply for the interlocking circuit of the DC switch disconnector.
Interlocking is active when the power supply is de-energized and inactive when
energized. Active interlocking prevents the closing (but not the opening) of the DC
switch/disconnector under load. The user must not close or open the DC
switch/disconnector under load as this can cause damage.
Specification: 24 V / 7 W. See also the connection diagrams.
WARNING! Do not operate (close or open) the DC switch/disconnector (Q11)
under load. It can damage the switch.
Selecting and routing the energy storage cables
Recommended cables
￭
The customer (or the system integrator) must acquire and connect the energy storage
cables. It is possible to use shielded cables with 2, 3 or 4 conductors. ABB recommends
to use shielded cables with 4 conductors.
Refer to the table below for the cables and possible configurations.
Cable type
2-conductor shielded cable
3-conductor shielded cable
4-conductor shielded cable
1) The shield must meet the requirements of IEC 61439-1. If the shield does not meet the requirements, an additional
PE conductor or cable is required.
ABB does not recommend to use single core cables. If it necessary to use single core
cables, obey these guidelines:
•
Use shielded cables. Ground the cable shields only at one end.
•
Put the cables in groups of 2 or 4.
•
Attach the cables according to the requirements to withstand the apparent short
circuit forces.
If the DC feeder has parallel strings, obey the additional guidelines in section
connection (page
25).
Typical cable sizes
￭
See the technical data.
Minimizing electromagnetic interference
￭
The customer (or the system integrator) must obey these rules in order to minimize
the electromagnetic interference caused by rapid current changes in the energy storage
cables:
Positive
Negative
1 conductor
1 conductor
1 conductor
1 conductor
2 conductors
2 conductors
PE (ground)
1)
Shield
1 conductor + shield
1)
Shield
Parallel
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