Eaton Cutler-Hammer CEP7 Series Manual
IL04303001E For more information visit: www.cutler-hammer.com
Series CEP7
Solid State Overload Relay
Instruction Leaflet
Overload Relay
Application and Installation
Description Page
Overload Relay Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Trip Curves and Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Operating Modes and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Contact Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Adjustment Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Table 1. Series CEP7 Solid State Overload Relay
Catalog Number 3-Phase ~ FLA Wire Size/Torque Accessories
CEP7-M(A)-32-__
0.1...32 #14...8 AWG
75ºC Cu
16 lb-in
CEP7-37-P-A
CEP7-M(A)-37-__
3.7...37 #14...8 AWG
75ºC Cu
12 lb-in
CEP7-M(A)-45-__
14...45 #14...6 AWG
75ºC Cu
14 lb-in
CEP7-45-P-A
CEP7-M(A)-85-__
26...85 #12...2 AWG
75ºC Cu
35 lb-in
CEP7-85-P-A
CEP7-M(A)-110-__
66...110 #8...1/0 AWG
75ºC Cu
150 lb-in
CEP7-LE1
CEP7-M(A)-180-__
57...180 #6...4/0 AWG
75ºC Cu
275 lb-in
CEP7-LF1
For more information visit: www.cutler-hammer.com IL04303001E
Instruction Leaflet
Page
2
Effective: February 2002
Series CEP7
Solid State Overload Relay
Trip Curves and Wiring Diagrams
Figure 1. Trip Curves
Figure 2. Wiring Diagrams — 3-Phase Full Voltage Across-the-Line Starter
.1
1
10
100
1000
110
2864
200
800
600
400
20
80
60
40
2
8
6
4
.2
.8
.6
.4
Class 10
Approximate Trip Time (seconds)
Multiple of Full Load Current
.1
1
10
100
1000
200
800
600
400
20
80
60
40
2
8
6
4
.2
.8
.6
.4
110
2864
Class 20
Approximate Trip Time (seconds)
Multiple of Full Load Current
Cold Start
Hot Start
1Connection must be made by user
T2T3
IL04303001E For more information visit: www.cutler-hammer.com
Instruction Leaflet
Effective: February 2002 Page
3
Series CEP7
Solid State Overload Relay
Operating Modes
Figure 3. Contact Status
Adjustments
Figure 4. Trip Current Adjustment Figure 5. Motor Current Rating
ATTENTION: Do not use automatic reset mode in applications where unexpected automatic restart of the
motor can cause injury to persons or damage to equipment.
CEP7-M32__
CEP7-M37__
CEP7-M45__
CEP7-M85__
CEP7-M110__
CEP7-M180__
CEP7-A32__
CEP7-A37__
CEP7-A45__
CEP7-A85__
CEP7-A110__
CEP7-A180__
■Man (Manual): Reset by pushing
button in. (Standard Offering)
■Trip: Push and turn reset button
counterclockwise to manually trip.
This action causes N.O. and N.C.
contacts to change state. Releas-
ing button reverts device to
manual mode.
■Auto: Push and turn reset button
to auto position. The relay resets
automatically — approximately
2 minutes after tripping.
(Optional Offering)
■Trip: Push and turn reset button
counterclockwise to manually trip.
This action causes N.O. and N.C.
contacts to change state. Releas-
ing button reverts device to
manual mode.
To adjust trip current, turn dial until the desired current is
aligned with the ▲pointer. Trip rating is 120% of dial setting.
Trip Indicator Window
Yellow indicator not visible: Not Tripped
Yellow indicator visible: Tripped
Push to Test
Instruction Leaflet
Page
4
Effective: February 2002
Series CEP7
Solid State Overload Relay
© 2002 Eaton Corporation
All Rights Reserved
Printed in USA
Publication No. IL04303001E
February 2002
CEP7 Application with (3) Current Transformers — Adjustment Guidelines
Current Transformers to be used with CEP7 Solid State Relays for Size 5 starters and above.
Setting the Overload Relay
1. Select
Table 2
,
3
or
4
depending on the Current Transformer (CT) ratio being utilized.
2. Select the “Equivalent FLA,” which most closely matches the motor FLA, then set the overload relay dial to the
corresponding “Dial Set Position.”
Note:
The motor FLA may not exactly match the value in the Equivalent FLA column.
3. The overload relay dial settings are calculated as:
Set Value = Dial Set Position/1/(CT Ratio) = Equivalent FLA
.
Example: CT Ratio is 300:5, motor FLA is 240A, set overload Dial Set Position at 4.0;
Set Value = 4.0/(1/60) = 240
.
Table 2. CT Ratio = 300:5 (Size 5 Starters)
Note:
Overload = CEP7-M32-5-20.
Range 1.6...5.0 (amperes).
Table 3. CT Ratio = 600:5 (Size 6 Starters)
Note:
Overload = CEP7-M32-5-20.
Range 1.6...5.0 (amperes).
Table 4. CT Ratio = 1000:5 (Size 7 Starters)
Note:
Overload = CEP7-M32-5-20.
Range 1.6...5.0 (amperes).
Dial Set
Position Equivalent
FLA
1.6
1.7
1.8
96
102
108
1.9
2.0
2.1
114
120
126
2.2
2.3
2.4
132
138
144
2.5
2.6
2.7
150
156
162
2.8
2.9
3.0
168
174
180
3.5
4.0
4.5
5.0
210
240
270
300
Dial Set
Position Equivalent
FLA
1.6
1.7
1.8
192
204
216
1.9
2.0
2.1
228
240
252
2.2
2.3
2.4
264
276
288
2.5
2.6
2.7
300
312
324
2.8
2.9
3.0
336
348
360
3.5
4.0
4.5
5.0
420
480
540
600
Dial Set
Position Equivalent
FLA
1.6
1.7
1.8
320
340
360
1.9
2.0
2.1
380
400
420
2.2
2.3
2.4
440
460
480
2.5
2.6
2.7
500
520
540
2.8
2.9
3.0
560
580
600
3.5
4.0
4.5
5.0
700
800
900
1000
Eaton Corporation
Cutler-Hammer business unit
1000 Cherrington Parkway
Moon Township, PA 15108-4312
USA
tel: 1-800-525-2000
www.cutler-hammer.com
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