Emerson Series 300 H-design User Manual download pdf (Page 3)

A S CO Series 300 Automatic Transfer Sw itc hes (ATSs) are

Listed under Underwriters Laboratories UL 1008 Standard

for Safety for A u tom atic Transfer Switches . All control

features are UL Component Recognized, which assures that

A S CO autom atic transfer sw itc he s meet OSHA Safety

Requirements and will be acceptab l e to electric al inspec tor s.

ASCO Series 300 Automatic Transfer Switches are suitable

for emergency and standby system applicati ons. They meet

emergency system rating requirements as defined i n

National Electrical Code (NEC) Article 700 and UL 1008.

Also, they are suitable for the require ments of NEC Article

517 – Health Care Facilities, NEC Article 701 – Legally

Required Standby Systems, NEC Article 702 – Optional

Standby Systems, NFPA 99 Health Care Facilities, and

NFPA 110 Emergency and Standby Power Systems.

Rating Label

Eac h autom atic trans fer sw itc h contain s a rating lab el to

define the loads and fault circuit withstand / cl osing ratings.

Refer to the lab el on the transfer switc h for specific values .

Do not exceed the values on the rating label.

Exceeding the rating can cause personal injury

or serious equipment damage.

terminal block TB

for engine start

and switch

position contacts

Transfer

Switch

Controller

power

connections

power

connections

membrane

controls

800 and 1000 amp. size in typical enclosure with location of customer connections

neutral

connections

neutral

connections

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Emerson Series 300 H-design User Manual Page 3