APC MW II manual Switchgear Service Entrance

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

Earthing arrangements and protective conductors - Symmetra MW inCTNinstallation-

See: IEC 60364-4-41 § 413.1.3

This system configuration is not recommended

Switchgear
Service Entrance						Q3
Q5				External SSW-Bypass
	Bypass - input					Bypass - output	Q6
	L1					L1
	L2					L2
	L3					L3
	Main Protective Earthing Terminal
	PE					PE	Q4
					SymmetraMW
Q1	Mains - input		i	Delta		UPS - output
				Inverter
	L1			i		L1
	L2		i			L2
	L3					L3
					u	u
	filter					M
	Common-mode
						u
						Main
						inverter
	N					N
PEN	E
PEN
	PEN				Main Protective Earthing Terminal		PEN
	PE					PE
	+	-	+	-
	1			2
	Battery			Battery		The "Common-Mode Filter" has no effect in this
						system configuration.

With reference to:
IEC 60364-4-41 § 413.1.3.1	Suitable earth electrode	Battery
	with reference to IEC 60364-5-55 § 551.4.2
		breaker
		box Q7	Q8
		PE
		Battery
		rack
		Battery 1	Battery 2
		PE

( PDU )

N

PEN

PE

31