APC MW II manual See IEC

28

Symmetra MW II 1200 kW 3 × 400/230 V Installation - 990-1979E-001

Service Entrance

Residual current protective device can not be used at this point.

Owing to parallel return path for the fault current

Residual Current Sense

N

PE

With reference to:

IEC 60364-4-41 § 413.1.3.1

Minimum cross-sectional areas:

IEC 364-5-54 § 543.1.1

Earthing arrangements and protective conductors - Symmetra MW inSTNinstallation-

		See:	IEC 60364-4-41		§ 413.1.3
Switchgear
				Q3				( PDU )
							Residual Current Sense	Residual current protective device
								can be used.
Q5				External SSW-Bypass		Q6
	Bypass - input				Bypass - output
	L1				L1
	L2				L2
	L3				L3
				Main Protective Earthing Terminal
	PE				PE	Q4
								PE
				SymmetraMW
Q1	Mains - input		i	Delta	UPS - output
				Inverter
	L1			i	L1
	L2		i		L2
EarthingProtectiveConductor	L3			u	L3
	mode-Commonfilter				u
				u
				M
					Main
					inverter
	N				N
	E
Protective Earthing Conductor				Main Protective Earthing Terminal
	PE				PE
	+	-	+	-
	Battery 1			Battery 2
	Battery
	breaker
	box Q7			Q8
	PE
Suitable earth electrode
with reference to IEC 60364-5-55 § 551.4.2
	Battery
	rack
	Battery 1		Battery 2
	PE