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RESOLVER MOTORS - - CONNECTIONS AND TERMINAL MARKINGS
MOTOR
T10
T11
T12
T7
T8
T9
T4
T5
T6
T1
T2
T3
MOTOR / RESOLVER LEADS
Motors are shipped with nameplate connections (i.e., 1-Y, 1-D, 2Y, or 2-D)
Check Motor nameplate for correct connections.
See page 4 for connection diagrams.
Consult drive manual for motor / drive interconnections.
SPACE HEATERS
When supplied, will have leads tagged H1 and H2. Check nameplate for voltage and current ratings.
OTHER ACCESSORIES
Check motor nameplate and accessories nameplates for connections and ratings.
CAUTION :
Connect cable shields to designated points only. DO NOT connect shields to ground.
THERMISTORS AND THERMAL
SWITCHES
Motors with R3 Resolvers have two thermal switches connected
in series embedded in the windings.
Motors equipped with R1 and R2 Resolvers have two Negative
Temperature Coefficient (NTC) thermistor probes. They are
10,000 ohms each @ 25°C, connected in parallel to terminals 8
and 9 in the motor junction box. Thermistor leads are labeled P1
and P2. At Room temperature (25°C) the resistance between P1
and P2 should be 5000 ohms.
The Overtemperature threshold for totally enclosed motors is
145°C (104.2 0hms). The threshold for drip proof and blower
ventilated motors is 130°C (150.5 ohms).
Since the potential exists for a thermistor to open up, Motor
Overtemperature Warnings should be set no higher than 80% of
Fault Temperature on totally enclosed motors, and no higher than
80% for drip proof and blower ventilated motors.
POW ERTEC "F" Series Motor Manual
CASE
GROUND
1 2
RESOLVER
3 4
5 6 7
Thermistor Resistance Table
Nominal Resistance between P1 and P2 in ohms
Resistance tolerance is +/- 5%
R
Winding
P1-P2
Temp.
°C
ohms
-30
88500
-20
48535
-10
27665
0
16325
10
9950
20
6250
30
4028
40
2663
50
1801
60
1244
70
876
80
629
© copy right 2012 by P O WE R TEC Industrial Motors, Inc.
Page
THERMISTORS
NTC
NTC
NC
8 9 10
R
Winding
P1-P2
Temp.
°C
ohms
90
459
100
340
110
255.5
120
194.5
130
150.5
140
117.5
150
92.5
160
74
170
59.5
180
48.5
190
39.7
200
32.8
7
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