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