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The document outlines various turbine and boiler tripping parameters along with their critical value thresholds. Key parameters include temperature, pressure, vibration, and level measurements that trigger safety trips to prevent equipment damage. Each parameter is associated with specific high or low limits that must be monitored during operation.

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mohit gohil
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28 views1 page

Protection File

The document outlines various turbine and boiler tripping parameters along with their critical value thresholds. Key parameters include temperature, pressure, vibration, and level measurements that trigger safety trips to prevent equipment damage. Each parameter is associated with specific high or low limits that must be monitored during operation.

Uploaded by

mohit gohil
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Sr No TURBINE TRIPPING PARAMETER VALUES

1 MS TEMPERATURE LOW < 370°C


2 MS TEMPERATURE HI > 530°C
3 MS PRESSURE LO < 42 kg/cm²
4 MS PRESSURE HI > 94 kg/cm²
5 TURBINE EXHAUST TEMPERATURE HI > 120°C
6 LUB. OIL HEADER PRESSURE LO < 1.6 kg/cm²
7 CONTROL OIL PRESSURE LO < 7.5 kg/cm²
8 TURBINE OVERSPEED TRIP > 7480 RPM
9 TURBINE FRONT/REAR BEARING TEMPERATURE HI > 125°C
10 GEAR BOX HI/LO SPEED BEARING TEMPERATURE HI > 110°C
11 THRUST BEARING TEMPERATURE HI > 125°C
12 AXIAL DISPLACEMENT HI ±0.8 mm
13 GENERATOR FRONT AND REAR SHAFT TEMPERATURE HI > 90°C
14 TG FRONT AND REAR SHAFT VIBRATION HI 90 μm
15 GEAR BOX HI SPEED DE/NDE VIBRATION HI 93 μm
16 GEAR BOX LO SPEED DE/NDE VIBRATION HI 232 μm
17 GENERATOR FRONT/REAR SHAFT VIBRATION HI 232 μm
18 TG EXHAUST STEAM PRESSURE HI -0.75 kg/cm²
19 GENERATOR DIFFERENTIAL PROTECTION
20 TG NO LOAD TRIP 3600 RPM

BOILER TRIPPING PARAMETER


21 Drum Level Lo Lo 22%
22 Drum Level Hi Hi 88%
23 Furnace Draught Hi Hi +22 mmwc
24 ID/PA Fan Bearing Temperature Hi Hi 105°C
25 FD Fan Bearing Temperature Hi Hi 95°C
26 FD Fan Motor Bearing Temperature Hi Hi 95°C
27 BFP Bearing Temperature Hi Hi 95°C
28 FD/BFP/MCW Motor Winding Temperature Hi Hi 140°C
29 BFP Suction Strainer DP Hi Hi (BFP Trip) 1800 mmwc
30 Hotwell Level Lo Lo 235 mmwc

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