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00001996 (REV AC) 627NH October 2014
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
substantially below normal. The current method is
recommend 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.
Table 8. Electrical Data for Hoist Components
Transformer Voltage Leads
*D.C.
RESISTANCE
(OHMS)
230/460 to 115
X2 to X1
H2 to H1
H3 to H4
27.9
99.0
111.8
230/380 to 48
X2 to X1
H2 to H1
H3 to H4
5.2
99.0
112.6
220/415 to 24
X2 to X1
H2 to H1
H3 to H4
1.3
100.4
114.9
575 to 115
X2 to X1
H4 to H1
28.4
329.1
Models
CONTACTOR OR
SPEED SELECTOR
COIL VOLTAGE
NOMINAL
CURRENT
(AMPS)
*D.C.
RESISTANCE
(OHMS)
A thru H-2
115
48
24
0.04
0.09
0.19
297.5
56.3
14.9
JJ thru RRT-2
115
48
24
0.07
0.17
0.33
126.6
25.1
6.4
Models
DC BRAKE
COIL
VOLTAGE
NOMINAL
CURRENT
(AMPS)
*D.C.
RESISTANCE
(OHMS)
A, AA, B, C, E
F and H
103 0.243 424.4
A thru H-2 205 0.122 1681
A-2 thru H-2 255 0.098 2601
J, JJ, L, LL, R, RR,
RT, RRT
103 0.311 331.5
J thru RRT-2 205 0.161 1273
J thru RRT-2 255 0.118
2167
* Resistance values listed are nominal and they may vary slightly from
component to component.
** On dual voltage units (230/460-3-60, 220/380-3-50 and
220/415-3-50), brake coils operate on 230 (220) volts.
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