(4) Thermal Overload Trip
The printed circuit board turns off the SCR firing or gate pulses and turns on the trip light when S5
overload thermostat
(3, Fig. 5)
opens. The power supply can not produce any DC output until the
S5 thermostat cools enough to automatically reset
(close).
1. Surge Suppressor (2) 4. Metering Shunt, R12
2. SCR Heat Sink Assembly 5. Heat Sink Insulator (2)
3. Overload Thermostat, S5 6. Flyback Diode, CR7
SCR Heat Sink Assembly
Figure 5
OM-2010
April 10/89 Revised 2-1
Page 11
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