TM 55-2210-224-12
1-14. MISCELLANEOUS CONTROL DEVICES
1 BATTERY SWITCH (BS). Battery switch provides protection to the battery. It must be closed during operating
periods and opened when the locomotive is shut down to disconnect the battery from the electric circuits.
2 TRANSITION RELAY PANEL. Electronically actuates relays which place field shunt resistors in parallel with the
traction motors at a predetermined speed.
3 SAFETY RELAYS (ACR1 AND ACR2). The safety relays shut down the engine if a problem develops with the
locomotive which would cause damage or create a safety hazard, such as loss of air or oil pressure.
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