ABB EF65-70 Data Sheet
Data sheet
Electronic overload relay EF65, EF96 and EF146
Electronic overload relays offer reliable
protection in case of overload and
phase-failure. They are the alternative to
thermal overload relays. Motor starters
are combinations of overload relays and
contactors.
Description
– Overload protection – trip class 10E, 20E, 30E selectable
– Phase loss sensitivity
– Temperature compensation from -25 … +70 °C
– Adjustable current setting for overload protection
– Automatic or manual reset selectable
– Trip-free mechanism
– Status indication
– STOP and TEST function
– Direct mounting onto block contactors
– Sealable operating elements
– Self-supplied devices
Order data
EF65, EF96, EF146 screw terminal
For AF40 … AF146 block contactors
2CDC231001V0013
2CDC231003V0013
Setting range
A
20 ... 56 EF65-56 1SAX331001R1102 AF40, AF52, AF65 1 0.821
25 ... 70 EF65-70 1SAX331001R1101 AF40, AF52, AF65 1 0.821
20 ... 56 EF96-56 1SAX341001R1102 AF80, AF96 1 0.802
36 ... 100 EF96-100 1SAX341001R1101 AF80, AF96 1 0.802
54 ... 150 EF146-150 1SAX351001R1101 AF116, AF140, AF146 1 0.879
Suitable for mounting on:
AF40, AF52, AF65
AF80, AF96
AF116, AF140, AF146
Type Order code Suitable for Packing unit
pc
Weight per pc
kg
Functional description
1~
3~
1
Terminals (1L1, 3L2, 5L3)
1
2
Sealable operating elements
3
Trip class 10E, 20E, 30E selectable
4
RESET
Automatic or manual reset selectable
2
5
TEST - Status indication
6
Signaling contacts 97-98
7
STOP
8
Terminals 2T1, 4T2, 6T3
9
Current setting range / Self-test function ST
Adjustable current setting for overload protection
10
Tripping contacts 95-96
2CDC232017F0013
3
4
5
6
7
8
9
10
Application / internal function
The self-supplied electronic overload relays are three pole electronic/mechanical devices. The motor current flows through
build-in current transformers and an evaluation circuit will recognize an overload (over current). This will lead to a release
of the relay and a change of the contacts switching position (95-96 / 97-98). The contact 95-96 is used to control the load
contactor. The electronic overload relay is self-supplied, which mean no extra external supply is needed.
The overload relays have a setting scale in Amperes, which allows the direct adjusting of the relay without any additional
calculation. In compliance with international and national standards, the setting current is the rated current of the motor and
not the tripping current (no tripping at 1.05 x I, tripping at 1.2 x I; I = setting current). The relays are constructed in a way
that they protect themselves in the event of an overload. The overload relay has to be protected against short-circuit. The
appropriate short-circuit protective devices are shown in the following tables.
To prevent thermal overloads in heavy duty applications, the correct cable sizes have to be selected.
Operation mode
50/60 Hz
2CDC232013F0012
Contact 95-96 Contact 97-98 Opto-mechanical slide Comment
Trip state open closed
RESET state closed open ON
TEST manual reset mode open closed
TEST auto reset mode open closed
STOP while device is in trip state open closed STOP button has no function
STOP while device is in RESET state open open while STOP button is pressed
2CDC232005F0013
2 - 2CDC107041D0201
Wiring diagram
97
98
Auto
2CDC232001F0011
duty ratio
(Op/h)
switching frequency
Trip class 10E
)
duty ratio
(Op/h)
switching frequency
Trip class 20E
)
duty ratio
(Op/h)
switching frequency
Trip class 30E
)
RESET
Man
95
TEST
2T1 4T2 6T3
STOP
96
2CDC232001F0011
Resistance and power loss per pole and short-circuit protective devices
Type Setting range Resistance per
pole
EF65-56
EF65-70
EF96-56
EF96-100
EF146-150
lower value
A
20 56 0.09 0.04 0.28
25 70 0.09 0.06 0.45
20 56 0.09 0.04 0.28
36 100 0.09 0.12 0.90
54 150 0.07 0.21 1.58
upper value
A
mΩ
Power loss per pole Short-circuit protec-
at lower value Wat upper value Wcoordination type 2
Intermittent periodic duty
t = 0.5 s
a
160
140
120
100
t = 1 s
a
80
60
t = 1.5 s
a
40
t = 3 s
a
20
t = 5 s
a
0
0 20 40 60 80 100
80
t = 2 s
a
70
60
50
40
t = 4 s
a
30
20
10
(%
2CDC232001F0214
t = 6 s
a
t = 8 s
a
t = 10 s
a
t = 12 s
a
0
0 20 40 60 80 100
(%
2CDC232002F0214
50
45
40
35
30
25
20
15
10
t = 5 s
a
t = 10 s
a
t = 15 s
a
t = 20 s
a
t = 25 s
a
5
0
0 20 40 60 80 100
tive devices
Fuse 160 A, Type gG
Fuse 160 A, Type gG
Fuse 160 A, Type gG
Fuse 200 A, Type gG
Fuse 315 A, Type gG
(%
2CDC232003F0214
Trip class 10E Trip class 20E Trip class 30E
2CDC107041D0201 - 3
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