ELECTRICAL DATA
To Detect Open and Short Circuits in
Electrical Components
Open circuits in the coils of electrical components may be
detected by isolating the coil and checking for continuity with
an ohmmeter or with the unit in series with a light or bell circuit.
Shorted turns are indicated by a current draw substantially
above normal (connect ammeter in series with suspected
element and impose normal voltage) or D.C. resistance sub-
stantially below normal. The current method is recommended
for coils with very low D.C. resistance.
Motor current draw in the stator should be measured with the
rotor in place and running. Brake, relay and contactor coil
current should be measured with the core iron in operating
position.
14
Electrical Data for Hoist Components
MOTORS
Voltage Full Load *D.C.
Phase Current Resistance
Models & Hertz H.P. (Amps) Leads (Ohms)
WB, WE 115-1-60 1/4 4.6 5 TO 8 (START) 4.9
T1 to T2 4.3
T3 to T4 4.3
WB, WE 230/460 1/4 1.4/.70 1 to 4 14.8
3-60 2 to 5 14.8
3 to 6 14.8
7 to 8 29.5
7 to 9 29.5
8 to 9 29.5
WF, WH 115-1-60 1/2 7.2 5 to 8 (START) 3.7
T1 to T2 3.8
T3 to T4 3.8
WF, WH 230/460 1/2 1.8/.90 1 to 4 7.8
3-60 2 to 5 7.8
3 to 6 7.8
7 to 8 15.6
7 to 9 15.6
8 to 9 15.6
WL, WR 115-1-60 1 9.8 5 to 8 (START) 1.3
T1 to T2 1.1
T3 to T4 1.1
WJ, WL, WR 230/460 1 3/1.5 1 to 4 4.7
3-60 2 to 5 4.7
3 to 6 4.7
7 to 8 9.4
7 to 9 9.4
8 to 9 9.4
*Resistance values listed are nominal and they may vary slightly from component to component.
**On dual-voltage units connected for 460 volts, brake coils operate on 230 volts.
Table 5
TRANSFORMER
D.C. Resistance
Voltage Leads (Ohms)*
230/480 Secondary:
TO 115 Blue-tan to Blue 19.5
Primary: .
Red-black 87.5
to Red-blue
Primary:
White-red to 99.0
White-green
CONTACTOR
Models Coil Normal D.C. Resistance
Voltage (Volts) Current (Amps) (Ohms)*
WB, WE,
WF & WH 120 .04 297.5
WJ, WL,
and WR 120 .04 297.5
BRAKE COIL
Rated Nominal Current D.C. Resistance
Voltage (Amps) at Rated Voltage (Ohms)*
115 0.5 6.2
230** 0.25 24.7
For more information contact: Sievert Crane and Hoist, (708) 771-1600, parts@sievertelectric.com, www.sievertcrane.com
To Next Page
Loading...
