APC MW II manual Symmetra MW

Page 34

30

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

Symmetra MW II

Service Entrance

Residual current protective device can not be used.

Switchgear

Q5

See:	IEC 60364-4-41	§ 413.1.3
	Q3				( PDU )
					Residual current protective
				Current Sense	device can be used.
				Current Sense
External SSW-Bypass				Residual
Bypass - input		Bypass - output	Q6	Residual
Bypass - input		Bypass - output	Q6
L1		L1
L2		L2
L3		L3
Main Protective Earthing Terminal
PE		PE	Q4
			Q4		PE
	SymmetraMW

1200 kW 3 × 400/230 V Installation

PEN

Residual Current Sense

PEN

Q1

ConductorEarthing

Protective

PE

Mains - input		i	Delta		UPS - output
		i	Inverter
L1			i		L1
			i
L2		i			L2
		i
L3					L3
				u	u
filter					u
filter					M
Common-mode					M
					Main
					inverter
					u
N					N
E
				Main Protective Earthing Terminal
PE					PE
+	-	+	-
Battery 1			Battery 2

- 990-1979E-001

With reference to:

IEC 60364-4-41 § 413.1.3.1

Suitable earth electrode

with reference to IEC 60364-5-55 § 551.4.2

Battery
breaker
box Q7	Q8
PE
Battery
rack
Battery 1	Battery 2

PE

Image 34

Contents Installation Page Contents Specifications Symbols used in this guide Installation safetyPage Inverter Section UPS SectionsSerial number Control/Input/Output SectionExternal Bypass Static Switch Power wiring UPS Wiring PrincipleOverview External disconnection switches Input/Output wiring precautions  AC and PE cable connectionsBattery cables connection Hole distance AC BAT1 + BAT2 External Bypass Static Switch Wiring Top cable entry Maintenance Bypass Panel Communication cable overviewLocation of relay boards Relay BoardsCommunication cables with optional Relay Board Relay Function Mode Special Comments Relay board 1 connectionsRelay board 2 connections Page Electrical Specifications Low-Impedance/High-Impedance EarthingAC Input DC InputAC Input External Bypass SSW AC OutputHeat dissipation Torque specifications Required Breaker Settings 400 V SystemsInput and upstream breakers Output and downstream breakers Dual Mains Installation TN Systems CharacteristicsSystem and Protective Earthing Reference to IEC 60364-4-41Additional requirements for generating sets IEC 60364-5-55 Protective devices in TN systemsTT Systems Protective devices in TT systemsIT Systems Condition Protective devices in IT systemsSee IEC Legal in DK specialcases Symmetra MW Switchgear Service Entrance Earthing arrangements and protective conductors Grounding Page Page 990-1979E-001 2009