Allen-Bradley CEP7 External Current Transformer Overload Relay Installation Instructions

Allen-Bradley CEP7 External Current Transformer Overload Relay is a reliable and versatile device designed to protect motors from overloads. It features selectable trip classes, automatic/manual reset modes, and adjustable trip current settings for precise motor protection. The CEP7 is compatible with a range of current transformers, enabling its use in various applications requiring high-current protection.

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Installation Instructions
CEP7 External Current Transformer Overload Relay
Application and Installation
At the end of its life, this
equipment should be
collected separately from
any unsorted municipal
waste.
25
(Cat CEP7-1EF_Z)
WARNING: To prevent electrical shock, disconnect from power source before installing or servicing. Install in suitable enclosure. Keep free from contaminants.
Follow NFPA70E requirements.
WARNING: Do not use automatic reset mode in applications where unexpected automatic restart of the motor can cause injury to persons or damage to equipment.
WARNING: The improper selection of a current transformer can result in the overload relay not properly protecting the motor and possible motor damage. The selected
current transformer must be rated for protective relaying applications.
Installation
DIN Rail Mount
CLICK
1.38
[35]
.85
[21.59]
.69
[17.63]
1.97
[50]
&Oslash; .18 in
[4.8] mm
&Oslash;.18
[4.5]
Settings
Selectable Trip Class
Automatic/Manual Reset Mode
Push to reset
Push to stop
To adjust trip current, turn
dial until the desired current is
aligned with the pointer.
Trip rating is 120% of dial setting.
Push to test
S.F. _ _
FLA _ _
S.F. &lt; 1.15
= .9 X FLA
S.F. &gt; 1.15
= 1 X FLA
Y
=
FLA
1.73
Trip Indicator Window
Red indicator not visible: Not Tripped
Red indicator visible: Tripped
FLA _ _
STAR DELTA (Y )
DOL
CEP7-1EF*Z
=
FLA
1.73
= 1 X FLA
2
CEP7 External Current Transformer Overload Relay Application and Installation
Main Connections
Rated Insulation Voltage (Ui):
690V AC
Rated Operational Voltage (Ue) IEC/UL: 690V AC / 600V AC
Rated Operating Frequency: 50 / 60 Hz
Wire Type
# Wires
Range
Torque
Flexible Stranded 1 Wire
0.75...2.5 mm&sup2; 1.4 N•m
w/ Ferrule
2 Wires*
1 Wire 0.75...4.0 mm&sup2; 1.4 N•m
Stranded / Solid
2 Wires* (18...12 AWG) (12 lb-in)
*FOR MULTIPLE CONDUCTOR APPLICATIONS
THE SAME SIZE AND STYLE WIRE MUST BE USED.
Contact Status
Wiring Diagram
L1/1
L2/3
Contact Ratings: N.O. C600 / N.C. B600 (AC)
N.O. / N.C. R300 (DC)
L3/5
Stop Pressed
Test Tripped
95
Normal
96
Closed
Open
Open
97
98
Open
Open
Closed
97 95
97 95
97 95
98 96
98 96
98 96
L1/1 L2/3 L3/5
H1(Dot)
X1
H1(Dot)
CT1
H2
H1(Dot)
X1
CT2
X2
T1/2
H2
X1
CT3
X2
X2
H2
T2/4
OVERLOAD
RELAY
T1/2 T2/4 T3/6
T3/6
M
Short Circuit Ratings, per UL60947-4-1 and CSA 22.2 No. 60947-4-1
Branch circuit protection may be fuses or circuit breakers sized per NEC/CEC.
Table 1: CEP7 UL Standard Fault Ra�ngs, Type I
CEP7 Overload
Max. Available
Amp Range Fault Current
Cat No
CEP7-
1EFHZ
1EFJZ
1EFKZ
1EFWZ
1EFLZ
1EFMZ
1EFNZ
30-150 A
40-200 A
60-300 A
80-400 A
100-500 A
120-600 A
160-800 A
10 kA
18 kA
CEP7-
30-150 A
40-200 A
60-300 A
80-400 A
100-500 A
CEP7-
600 V
30 kA
Table 3: Type I per EN/IEC 60947-4-1
CEP7 Overload
Standard Fault,
Prospec�ve S. C.
Amp Range current , Ir (kA)
Cat No
1EFHZ
1EFJZ
1EFKZ
1EFWZ
1EFLZ
1EFMZ
1EFNZ
Max. Voltage
Table 2: Panel Mount, Standalone Overload, High Fault, Type I
CEP7 Overload
Max. Available
Max. Voltage
Amp Range Fault Current
Cat No
1EFHZ
1EFJZ
1EFKZ
1EFWZ
1EFLZ
1EFMZ
1EFNZ
30-150 A
40-200 A
60-300 A
80-400 A
100-500 A
100 kA
120-600 A
160-800 A
High Fault,
Condi�onal S. C.
current , Iq (kA)
Max
Voltage (V)
100 kA
600 V
10 kA
18 kA
120-600 A
160-800 A
30 kA
Publication CEP7-IN047B-EN-P - March 2022
PN-647781
DIR 10006402806 (Version 01)
600 V
CEP7 External Current Transformer Overload Relay Application and Installation
3
Current Transformer Selection and Application
CEP7 overload relays (Cat. No. CEP7-1EF_Z) are designed for use with separately mounted, customer-supplied current transformers (CTs) as required in
higher-current applications. CTs must be kept at least six times the wire gauge from the overload relay.
CEP7 Cat. No. CEP7-1EFHZ CEP7-1EFJZ CEP7-1EFKZ CEP7-1EFWZ CEP7-1EFLZ CEP7-1EFMZ CEP7-1EFNZ
FLA (A)
30-150
40-200
60-300
80-400
100-500
120-600
160-800
C.T. Ra�o
150:5
200:5
300:5
400:5
500:5
600:5
800:5
CT
1411-*-151 1411-*-201 1411-*-301 1411-*-401 1411-*-501 1411-*-601 1411-*-801
Current Transformer Specification (One Per Motor Phase)
Rating:
Protective Relaying
Secondary Current: 5 A
Secondary Load: 0.1VA (Overload Relay Only)
Accuracy:
2% Over Operating Range
ANSI (USA):
Class C57.13,BO.1
CSA (Canada):
Class 10L5
IEC (Europe):
5VA Class, 5P10
Primary
Current
Transformers
Trip Curves
Hot Trip Curves
Cold Trip Curves
1000
Time (s)
1000
100
100
Class 30
Class 20
Class 15
Class 10
10
1
1
Multiple of FLA
8
10
1
Publication CEP7-IN047B-EN-P - March 2022
1
Multiple of FLA
PN-647781
DIR 10006402806 (Version 01)
Class 30
Class 20
Class 15
Class 10
8
Accessories
Overload Relay Reset Adapter
(Cat CEP7-1ERA)
1
2
3
4
Overload Relay Anti-Tamper Shield
(Cat CEP7-1BC8)
2
1
0.8 x 2.5 mm MAX
3
CLICK
Sprecher + Schuh maintains current product environmental information on its website at http://www.sprecherschuh.com/library/approvals/compliance.html
Sprecher + Schuh, 15910 Int. Plaza Dr., Houston TX 77032, USA
Publication CEP7-IN047B-EN-P- March 2022, Supersedes CEP7-IN047A-EN-P- September 2021
PN-647781
DIR 10006402806 (Version 01)
Copyright &copy; 2022 Sprecher+Schuh, Inc. All Rights Reserved.
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Key features

Selectable Trip Class
Automatic/Manual Reset Mode
Adjustable Trip Current
DIN Rail Mount
Trip Indicator Window
Short Circuit Protection
Current Transformer Compatibility

Frequently asked questions

To adjust the trip current, turn the dial until the desired current is aligned with the pointer. The trip rating is 120% of the dial setting.

The red indicator in the window shows whether the overload relay has tripped. If the indicator is visible, the relay has tripped. If it is not visible, the relay is not tripped.

The CEP7 is compatible with various current transformers with different ratios, such as 150:5, 200:5, 300:5, 400:5, 500:5, 600:5, and 800:5. The appropriate ratio depends on the motor's full-load amps (FLA) and the desired protection level.