Generac Power Systems 004945-1 Introduction, Equipment Description, Transfer Switch Data Decal

Section 1 — General Information

ATS “HS” Type Transfer Switch

1.1INTRODUCTION

This manual has been prepared especially for the purpose of familiarizing personnel with the design, application, installation, operation and servicing of the applicable equipment. Read the manual carefully and comply with all instructions. This will help to prevent accidents or damage to equipment that might otherwise be caused by carelessness, incorrect appli- cation, or improper procedures.

Every effort has been expended to make sure that the contents of this manual are both accurate and cur- rent. The manufacturer, however, reserves the right to change, alter or otherwise improve the product at any time without prior notice.

Figure 1.1 — Typical ATS Transfer Mechanism

UTILITY LUGS

UTILITY

CLOSING

COIL

GENERATOR

LUGS (E1 & E2)

GENERATOR

CLOSING

COIL

1.2EQUIPMENT DESCRIPTION

The automatic transfer switch is used for transfer- ring electrical load from a UTILITY (NORMAL) power source to an EMERGENCY (STANDBY) power source. Such a transfer of electrical loads occurs automati- cally when the UTILITY power source has failed or is substantially reduced and the EMERGENCY source voltage and frequency have reached an acceptable level. The transfer switch prevents electrical feedback between two different power sources (such as the UTILITY and EMERGENCY sources) and, for that reason, codes require it in all standby electric system installations.

The transfer switch consists of a transfer mecha- nism, service disconnect circuit breaker, a relay control, fuses, and a terminal strip for connection of sensing wires.

This transfer switch is suitable for use as service entrance equipment.

‹1.2.1 TRANSFER SWITCH MECHANISM

These switches (Figure 1.1) are used with a single- phase system, when the single-phase NEUTRAL line is to be connected to a Neutral Lug and is not to be switched.

Solderless, screw-type terminal lugs are standard.

Switch	Wire	Conductor Tightening
Rating	Range	Torque
100A	#14-1/0 AWG	50 in-lbs.
200A	#6-250 MCM	275 in-lbs.

This transfer switch is suitable for control of motors, electric discharge lamps, tungsten filament and elec- tric heating equipment where the sum of motor full load ampere ratings and the ampere ratings of other loads do not exceed the ampere rating of the switch and the tungsten load does not exceed 30 percent of the switch rating.

LOAD LUGS (T1 & T2)

This transfer switch is for use in optional standby systems only.

This transfer switch is suitable for use on a circuit capable of 10,000 rms symmetrical amperes, 240 VAC maximum.

‹1.2.2 SERVICE DISCONNECT CIRCUIT BREAKER

The service disconnect circuit breaker for the 100 amp models are:

•Siemens, Type BQ, 2-pole

•120/240VAC, 100A

•50/60 Hertz

•Heating, Air Conditioning and Refrigeration (HACR) rated

•Wire range: #1 - #8 AWG.

•The conductor tightening torque is 50 in-lbs.

The service disconnect circuit breaker for the 200 amp models are:

•Siemens, Type QN, 2-pole

•120/240VAC, 200A

•50/60 Hertz

•Heating, Air Conditioning and Refrigeration (HACR) rated

•Wire range: 300 KCMIL - 4 AWG

•The conductor tightening torque is 250 in-lbs.

1.3TRANSFER SWITCH DATA DECAL

A DATA DECAL is permanently affixed to the transfer switch enclosure. Use this transfer switch only with the specific limits shown on the DATA DECAL and on other decals and labels that may be affixed to the switch. This will prevent damage to equipment and property.

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