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|  MIL-T-62222(AT)
3.4.15.1.2 Hull-to-turret slipring. The hull to turret slipring shall provide power and signal
circuits capable of maintaining positive electrical contact between the hull and turret electrical
subsystems under all vehicle environments (see 4.6.16.1.2).
3.4.15.1.3 Auxiliary outlet. Two outlets [24 volts (V) direct current (dc) nominal], one each
in the turret and hull, shall be provided for use with the BII trouble light assemblies. Each
auxiliary outlet circuit shall be protected with a 15 ampere (A) automatic reset circuit breaker
(see 4.6.16.1.3).
3.4.15.1.4 Personnel heater. The heater shall be capable of starting with the switch in either
Hi or Lo position. The blower motor shall operate at reduced speed when the heater is turned on.
The burner shall ignite within four minutes of heater turn-on. Subsequent to ignition, the heater
shall be capable of generating high or low heat and the blower motor shall run at full speed.
Turning the heater OFF shall cause both the burner to extinguish and the blower motor to shut
off within 3.5 minutes (see 4.6.16.1.4).
3.4.15.1.5 Engine smoke generator. The vehicle shall provide smoke in the left and right
exhaust pipes when the engine is running and the smoke generator switch is in the ON position
(see 4.6.16.1.5).
3.4.15.2 Hull electrical.
2.4.15.2.1 Power plant electrical. The power plant electrical equipment shall consist of the
following (see 4.6.16.2.1):
a. Engine and transmission sending units necessary to provide pressure and temperature
signals to the driver's instrument panel.
b. An electrical disconnect to facilitate power pack removal and replacement.
c. An electrical starter motor capable of starting the engine.
d. Generator for supplying electrical energy.
3.4.15.2.2 Exterior lights. The external lights shall operate as specified on applicable
drawings through all vehicle operating conditions. All electrical contacts and connections shall
maintain positive contact under all vehicle operating conditions (see 4.6.16.2.2).
3.4.15.2.3 Generator voltage. With the engine operating at not less than 1000 rpm, the
vehicle generator shall deliver between 25.8 and 30.2 V at the battery, except when the turret
hydraulic power pack is energized, the voltage shall not be less than 18.5 V (see 4.6.16.2.3).
3.4.15.2.4 Driver's infrared power pack high voltage supply. With the generator supplying
specified voltage, the infrared power pack output voltage at the driver's periscope connector
shall be not less than 14 000 V, without any evidence of high voltage arcing (see 4.6.16.2.4).
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