2. TYPE OF PROTECTIVE DEVICE FUSE LOW VOLTAGE FUSE HIGH VOLTAGE
MCB ELCB MCCB RCCB SFU BREAKRS RTD THERMOCOUP LE THEWRMOSTA TE 3.
HT FUSE RATING 11/0.415KV KVA PRIMARY SECONDR Y MIN. FUSE MAX. FUSE
50 2.9 72 6 10 75 4.3 108 10 16 100 5.8 144 16 25 125 7.2 180 16 40
160 9.2 231 16 40 200 11.5 290 25 40 250 14.4 360 32 40 315 18.2
455 40 63 400 23 576 40 63 4. RTD MADE OF PLATINUM , NICKEL, COPPER
TEMP- 600 DEGREE 5. THERMO COUPLE-TEMPERATURE SENSOR MADE NICKEL,
PLATINUM , COPPER RATING UPTO 3000 DEG. 6. BMR RATING a) with CT b)
without CT 7. THERMOSTAT RATING-5A 8. Relay Thermal over load relay
Over current relay Under voltage relay Frequency relay Earth fault
relay Buchholz relay Master trip Auxiliary relay OTI 9. MOTOR
PROTECTION UPTO 55KW SHORT CIRCUIT PROTECTION BY FUSE SINGLE
PHASING PROTECTION THERMAL OVER LOAD WINDING TEMPERATURE PROTECTION
10. MOTOR PROTECTION 55-200 KW SHORT CIRCUIT PROTECTION BY FUSE
SINGLE PHASING PROTECTION THERMAL OVER LOAD WINDING TEMPERATURE
PROTECTION STALLED ROTOR 11. PROTECTION OF HT MOTOR SHORT CIRCUIT
PROTECTION BY FUSE/BREAKER SINGLE PHASING PROTECTION THERMAL OVER
LOAD WINDING TEMPERATURE PROTECTION STALLED ROTOR UNDER VOLTAGE
BEARINGOVER TEMPERATURE DIFFERENTIAL PROTECTION PHASE REVERSAL 12.
Transformer rating 25,40,63,100 150,250,300, 400,500,630,750,
1000,1250,1600, 2000,2500 150,250,300, 400,500,630,750 ,
1000,1250,1600, 2000,2500 Distribution Power 13. PROTECTION OF
DISTRIBUTION TRANSFORMER Over current protection Earth fault
protection Buchholz relay OTI WTI Low oil level 14. PROTECTION OF
POWER TRANSFORMER Over current protection Earth fault protection
Buchholz relay OTI WTI Low oil level Differential protection Over
fluxing 15. CABLE PROTECTION O/C +E/F (CDG31) Feeder differential
16. Busbars Differential protection (CAG34) 17. Outgoing feeders
from 11KV SWBD Differential (HORM-4) O/C +E/F (CDAG 51) 18.
RESSTRICTED EARTH FAULT RELAY 19. BIMETALIC =BMR 20. BUCHHOLZ RELAY
21. MASTER TRIP 22. ACT FAST AND INITIATE FIRST . ---- 23. THANK
YOU
