APC MW II Symmetra MW II 1200 kW 3 400/230 V Installation - 990-1979E-00132

Symmetra MW II 1200 kW 3 × 400/230 V Installation - 990-1979E-00132
Residual Current Sense
Mains - input UPS - output
PE
N
PE
PE
PE
Bypass - input Bypass - output
L1 L3 L2
L1 L3 L2
N
L1 L3 L2
L1 L3 L2
PE
Protective Earthing Conductor
Main Protective Earthing Terminal
External SSW-Bypass
Symmetra MW
( PDU )
Service Entrance
Main
inverter
u
u
u
M
Main Protective Earthing Terminal
N
PE
Q1
Q6
Q3
Q5
Earthing arrangements and protective conductors - Symmetra MW in TT installation
E
Suitable earth electrode: RA x Ia < 50V
With reference to IEC 60364-4-41 § 413.1.4.2
Residual current protective device can be used.
Residual Current Sense
+- +-
Battery 1
Battery 2
Q7 Q8
Battery 1 Battery 2
PE PE
Battery rack Battery breaker
box
Q4
Delta
Inverter
i
i
i
Common-mode filter
Switchgear
See: IEC 60364-4-41 § 413.1.4
With reference to IEC 60364-4-41 § 413.1.4.1
Residual current protective device can not be used at this point. Owing to parallel return path for the fault current