ABB ZX2 - Fitting Surge Arresters

3. INSTALLATION OF THE SWITCHGEAR AT SITE 63
3.6. Fitting surge arresters
Hazard warning
If the switchgear is in operation:
• Isolate the relevant feeder panel before
installing the surge arresters.
• Comply with the safety regulations of
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• Test the feeder panel for the off-circuit
condition in accordance with section
5.1.
• Ground the feeder panel and secure the
working area in accordance with sec-

• Switch the mcbs(
1
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erating mechanisms off so that the
feeder panel cannot be switched on by
remote control.
• Remove the cover of the cable termination
compartment.
• Remove the dust protection caps or blanking
plugs from the test sockets and store the
components for further use.
• Prepare the surge arresters in accordance with
the manufacturer’s instructions.
• Install the surge arresters in accordance with
the manufacturer’s instructions.
• Connect the grounding terminal of the surge
arrester to the main grounding bar of the panel
using the wires provided (cross section AWG 3
(25 mm²) with cable lugs), as shown in fig. 3.6.1.
Configure the connection of the grounding
leads to the surge arrester in accordance with
the manufacturer’s instructions.
• Fit and screw in the cover of the cable
termination compartment.
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Fig. 3.6.1:
Grounding of
surge arresters
Surge
arresters
Grounding leads
Connection to
main ground bar Main ground barTest socket
1. mcb: miniature circuit breaker.