The resistance of VSD fans SLB VSDs (518, 700 and 815 KVA 18P) Device Left HEX 1 Description Heat Exchanger Rating Part Number 230 V , 100 W PC67808P168 TB 10 - 2 T.B wiring TB 10-1 TB 10-2 TB 10 - 1 Value of resistance Disconnect the cable of HEX fan from (TB 10-1 and TB 102) and measure between them as shown found the value of resistance equal ( 58 ohm +/5%) Device Back HEX 2 Description Heat Exchanger Rating 230 V , 55 W Part Number PC67808P167 T.B wiring TB 6 - 5 TB 6 - 6 Value of resistance Disconnect the cable of HEX fan from (TB 6-5 and TB 6-6) and measure between them as shown found the value of resistance equal ( 25.8 ohm +/5%) Device Description Rating Part Number Back FAN 1 and FAN 2 Heat Sink Fans 230 V ,180 w PC50050P312 T.B wiring FAN 1 (TB 3 (1 , 2 and 4) ) FAN 2 (TB 4 (1 , 2 and 4) ) Value of resistance Disconnect the cable of heat sink fan from (TB 3 (1 , 2 and 4)) and measure: FOR FAN1 1- Between (TB 3-1 (BROWN) and TB 3-2 (GREY) ) as shown found the value of resistance equal ( 21.8 ohm +/5%) 2- Between (TB 3-1 (BROWN) and TB 3-4 (Black) ) as shown found the value of resistance equal ( 59.8 ohm +/5%) 3- Between (TB 3-2 (GREY) and TB 3-4 (BLACK) ) as shown found the value of resistance equal ( 81 ohm +/- 5%) 4- FAN 2 same as FAN1 Device Fan A , B Description RECA, B FANS ( DIODE FANs) Rating 230 V Part Number 00224 T.B wiring 21 KE (T3 of TCC temperature control contactor ) and 8JK Value of resistance Disconnect the cable from RECA fan and measure between the pins of the fan as shown found the value of resistance equal ( 656.5 ohm +/5%) Device Fan 11 , 12 Description Internal Fans Rating Part Number 240 V, 33W 00226 T.B wiring FAN 11 (TB 1 (7 , 8)) FAN 12 (TB 12 (1 , 2) ) Value of resistance 1- Disconnect the cable of Internal fan (FAN 11) from (TB 1-7 and TB 1-8) and measure between them as shown found the value of resistance equal ( 364.4 ohm +/- 5%) 2- Disconnect the cable of Internal fan (FAN 12) from (TB 12-1 and TB 12-2) and measure between them as shown found the value of resistance equal ( 364.4 ohm +/5%) Device FAN 31 FAN 32 Description Phase Shift Transformer fan ( 3 phase) Rating 480 V , 165W Part Number PC50050P050 T.B wiring FAN 31 (T1,T2,T3) of (OL1A (over load relay) ,OL1B(relay mount) Value of resistance Disconnect the 3 cables of Phase Shift Transformer fan FAN 31 from (T1,T2,T3) of (OL1A ,OL1B) and measure between three cables FAN 32 (OL2A,OL2B) as shown found the value of resistance equal ( 380, 399 and 413 ohm +/- 5%) FAN 32 same as FAN31