DIESEL LOCO - Safety Devices

DIESEL LOCO - Safety Devices

 Safety devices are provided for the safety of the engine & loco. They are

1. Over Speed Trip Assembly (OSTA) - It is located on engine right side free end. It protects the engine from over speeding. On 8th notch the engine rpm is 1050. Due to any reason engine speed exceeds up to 1180 ± 20 rpm, OSTA will operate, fuel rack comes to zero and engine will shut down without any indication. Two handles are provided on OSTA, small is trip handle and big is reset handle. To reset OSTA, pull reset handle gently.

 Note -

• If OSTA trips during transition, reduce one notch. 
• If OSTA trips on higher notches, work on lower notches. 
• If OSTA trips repeatedly, check the wire connections of Techo. generator and inform the power controller. 
• Ensure that OSTA is reset before starting the engine and press the governor linkage. 

2. Oil Pressure Switch (OPS) - In EH governor it is located in loco pilot cab on nose compartment wall, whereas in WW governor loco, it is inside the governor. It protect engine from low lube oil pressure.