Architectural and Engineering Design Standards

o. Battery Charger

A battery charger shall be furnished. The charger shall employ a transistor controlled

magnetic amplifier circuit to provide continuous taper charging and shall maintain

rated output voltage with an A.C. line fluctuation of ±10%. The charger shall have:

1) 2 ranges – Float at 2.17 V.P.C. and equalize at 2.33 V.P.C.

2) Automatic A.C. line compensation.

3) Automatic overload protection.

4) Silicone diode full-wave rectifier.

5) Automatic surge suppressors.

6) D.C. ammeter and voltmeter.

7) Fused A.C. input and D.C. output.

8) Low D.C. voltage alarm relay.

9) High D.C. voltage alarm relay.

As an alternate to the Base Bid the vendor shall provide, should compressed air

starting be selected by UIHC, a 24 volt D.C. battery and a battery charger to provide

alarm and control power as follows:

1) Battery shall be lead acid type – heavy duty, with deep cycle characteristics.

2) Not less than 90 ampere hour capacity.

3) Battery rack.

4) Charger shall be solid state type to maintain battery fully charged.

5) Charger shall accept a 115 volt A.C. supply.

6) Charger shall include D.C. ammeter and voltmeter, fused A.C. input and D.C.

output, and low voltage alarm relay.

p. Control Panel and Switchgear

A control panel shall be furnished, which shall be free standing and shall include (not

necessarily limited to) the following:

1) Metering:

a) Ammeter – 2% of full scale accuracy.

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November 1, 2016