GE Entelli-Switch 250 manual Authorized Service, Table of Contents, Introduction

Authorized Service

For GE parts and service, call: (773) 299-6600

Table of Contents

	Page		Page
Introduction	. . . .12	Testing	.120
Safety	. . . .13	Introduction	.120
Equipment Inspection and Storage . . . .	. . . .13	Test Options	. .20
Final Equipment Inspection	. . . .13	Standard Transition	.121
Installation	. . . .14	Delayed Transition	. .21
Engine Start Control Connections	. . . .14	Closed Transition	. .22
Initial Energization	. . .14-5	Emergency Service Procedure
Control Connections	. . . . .6	for Extended Parallel Time	. .23
Entelli-Switch 250 Microprocessor Controller	. . . .17	Sequence of Operation	. .24
Overview	. . . .17	Standard Transition	.124
LCD & Keypad	. . . .18	Delayed Transition	. .24
User Setting for Voltage & Frequency . .	. . . .19	Closed Transition	. .25
Accessory Group Packages	. . . .10	Relay/Transformer (R/T Box)	. .26
Accessory Definitions	. .11-14	Standard	.126
How to Set the System Clock	. . . .14	Delay	.127
CDT One Event Timer Exerciser	. . . .15	Schematics	.128
CDP Clock Exerciser	. . . .16	Troubleshooting & Diagnostics	. .29
User Setup - CFG Menu	. . . .17	Maintenance and Testing	. .30
User Setup - SET Menu	. . . .18	Inspection and Cleaning	. .30
User Setup - System Info	. . . .19	Servicing	.130
		Testing	.130

Introduction

GE Zenith Transfer Switches are used to provide a continuous source of power for lighting and other critical loads by automatically transferring from source 1 power to source 2 power in the event that source 1 voltage falls below preset limits.

Voltage sensing and system control is performed via a state-of-the-art microcontroller located on the cabinet door. It is designed to give highly accurate control of the transfer switch system.

All GE Zenith transfer switches are designed for use on emergency or standby systems, and are rated for total system or motor loads. Transfer switches are UL Listed under Standard 1008 and CSA Certified under Standard C22.2 No. 178 and IEC Listed under Standard 947.

NOTES: A protective device such as a molded case circuit breaker or fused disconnect switch MUST be installed on both sources of incoming power for circuit protection and as a disconnection device.

All references made within this manual about the term “S1” or “Source 1” relate to a Normal Power Source. All references made about the term “S2” or “Source 2” relate to an Emergency

or Alternative Power Source.