Emerson 250 installation manual Front View

Page 22

Installation Drawings

Figure 9 Bottom cable entry routing and installation order

	DC (POSITIVE)
	DC (NEGATIVE)		DC (POSITIVE)
	GROUND (TOP ENTRY)		DC (POSITIVE)
	GROUND (TOP ENTRY)		DC (NEGATIVE)
			DC (NEGATIVE)
	BYPASS NEUTRAL		BYPASS NEUTRAL
FAULT BRACE		FAULT BRACE	BYPASS INPUT
		BYPASS INPUT	BYPASS INPUT
		BYPASS INPUT	(PHASE C)
BYPASS INPUT	BYPASS INPUT		(PHASE C)
BYPASS INPUT	BYPASS INPUT
		FAULT BRACE	RECTIFIER INPUT
FAULT BRACE	RECTIFIER INPUT		(PHASE C)
RECTIFIER INPUT	RECTIFIER
	INPUT	FAULT BRACE	OUTPUT (PHASE C)
FAULT BRACE		OUTPUT
OUTPUT	OUTPUT
	GROUND (BOTTOM ENTRY)		OUTPUT NEUTRAL
			OUTPUT NEUTRAL
	OUTPUT NEUTRAL

OUTPUT CONDUIT

INPUT CONDUIT

		BYPASS CONDUIT
	FRONT VIEW	DC CONDUIT
	FRONT VIEW	SIDE VIEW
		SIDE VIEW

Recommended order of installation for cables: 1.) Output Neutral

2.) Output Power (Phases A-B-C)

3.) Rectifier Input Power (Phases A-B-C)

4.) Bypass Input Power (Phases A-B-C)

5.) Bypass Neutral

6.) DC Power

7.) Ground

The cables must be routed around the fault braces. This is to prevent the cables from coming in contact with

other busbars.

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Contents

Liebert NXL Product Warranty Registration Contacting Liebert for SupportTable of Contents Figures Important Safety Instructions Page Preliminary Checks SINGLE-MODULE Mechanical InstallationIntroduction Environmental ConsiderationsPositioning System CompositionMaintenance Bypass Cabinet Cable EntryExternal Protective Devices Power CablesUPS Electrical Installation Dual InputPower Cable Connection Procedure Top Cable EntryControl Cable and Communications External Interface Board connections layoutControl Status Inputs Dry Contact Dry ContactsEPO Input Dry Contact Remote EPO inputControl Status Output Dry Contacts Switch Auxiliary Inputs Dry ContactsLoad Bus Synch Connection Communication and Monitoring Single-Module System OptionsOptional Equipment Installation Drawings Main components location, 250kVA Liebert NXL UPSTop View Doors Open Doors and Inner Skins Removed Outline drawing, 300kVA Liebert NXL UPS Front Front View Side View Front View Right Side View Front Doors Removed Front Detail a Battery & DC Parameters SpecificationsLiebert NXL UPS specifications 250 300 400 Input Parameters250 300 400 Physical Parameters and Standards, in mm Environmental ParametersCurrent ratings-rectifier input Current ratings-batteryLiebert NXL system and inverter efficiencies Current ratings-bypass inputRectifier Input BatteryRecommended conduit and cable sizes Bypass InputRecommended lug sizes Series Cable Size One Hole Two HoleTi n Ne tIti That

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