Wiring Instructions
Installation Manual
36
Wiring Instructions
This chapter describes how to perform the system wiring and cabling procedures.
Read the Safety section first follow the rule carefully before doing any wring and cabling works to
ensure personal safety.
Safety
Surge Arrester Safety
The function of lightning and surge protection systems is to protect the devices, functional isolations
and over voltage-sensitive consumer equipment of the 100kW PCS. The 100kW PCS is equipped with
a Type 2 Surge Arrester to cover the system when not placed directly in a lightning strike area.
Due to the wide energy voltage and frequency range of over voltage in lightning strike areas, it is
advisable to install a Type 1 Surge Arrester to augment the protection coverage around the user’s
switchboard.
Battery Ground Fault Concerns
The following are concerns surrounding potential risks of DC ground faults and the possible causes.
The primary concerns with any Battery Ground Fault include three principle areas:
1. Fire due to ground fault.
2. Risk to personnel due to ground or battery fault.
3. Risk to system reliability due to ground fault.
Shock Hazard:
Ensure that no DC voltage is being supplied to the PCS and that no AC
voltage is present on the AC wiring. Failure to do so could cause serious injury or death.
A warning label is provided to inform all personnel that multiple sources of power are
available inside. This label is installed on the outside of the door and should remain
clearly visible. Ensure all sources are OFF or disconnected before servicing.
The Delta 100kW PCS contains electrical components carrying potentially lethal
voltages and currents. Extreme caution should be exercised around the system,
especially when the cabinet door is open once it's installed. Before opening the cabinet,
all supply power should be disconnected using a standard physical lock-out procedure
and the service personnel should wait 5 minutes prior to opening the enclosure door.
WARNING!
Grounding:
All input and output circuits are isolated from the enclosure. System grounding,
when required by EN 62477-1 and AS 62040.1.1, is the responsibility of the installer.
WARNING!
To prevent possible escalation into serious or catastrophic ground faults, make sure to equip
the corresponding Ground Fault Detection (GFD) equipment and follow strict maintenance
guidelines.
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