APC Symmetra MW Installation Guide download pdf (Page 47)

Residual Current Sense

Mains - input

UPS - output

Bypass - input Bypass - output

Protective Earthing Conductor

Main Protective Earthing Terminal

External SSW-Bypass

Symmetra MW

( PDU )

Service Entrance

Mai n

inverter

Main Protective Earthing Terminal

Earthing arrangements and protective conductors - Symmetra MW in TN-S installation

Suitable earth electrode

with reference to IEC 60364-5-55 § 551.4.2

Residual current protective device

can be used.

Residual Current Sense

Residual current protective device can not be

used at this point.

Owing to parallel return path for the fault current

With reference to:

IEC 60364-4-41 § 413.1.3.1

Minimum cross-sectional areas:

IEC 364-5-54 § 543.1.1

+- +-

Battery 1

Battery 2

Q7 Q8

Battery 1 Battery 2

Battery

rack

Battery

breaker

box

Delta

Inverter

Common-mode filter

Switchgear

See: IEC 60364-4-41 § 413.1.3

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APC Symmetra MW Installation Guide Page 47