EF205, EF370 electronic overload relays
63 to 380 A
2CDC231010V0012
Description
The EF205 and EF370 are self-supplied electronic overload relays, which means no extra external supply
is needed. It offers reliable protection for motors in the event of overload or phase failure. Easy to use
like a thermal overload relay and compatible with standard motor applications, the electronic overload
relay is convincing, above all, due to its wide setting range, high accuracy, high operational temperature
range and the possibility to select a trip class (10E, 20E, 30E). Further features are the temperature
compensation, trip contact (N.C.), signal contact (N.O.), automatic or manual reset selectable, trip-free
mechanism, STOP and TEST function and a trip indication. The overload relays are connected directly to
the contactors.
EF205-210
Ordering details
Setting range
Short-circuit
protective device
A
63 ... 210
Type
Order code
1250 A, Fuse type gG 10E, 20E, 30E
EF205-210
1SAX531001R1101
Weight
(1 pce)
kg
1.210
1600 A, Fuse type gG 10E, 20E, 30E
EF370-380
1SAX611001R1101
1.430
2CDC231013V0012
115 ... 380
Trip class
EF370-380
Main dimensions
mm, inches
122.8
17.9
122 4.8"
30 1.18"
4.83"
4.59"
5 0.2"
17.5 0.69"
Ø 0.33"
35 1.38"
35 1.38"
35 1.38"
2CDC232004F0012
Ø 8.5
10 0.39"
18.5 0.73"
5 0.2"
0.7"
11 0.43"
7.4 0.29"
116.5
10 0.39"
4.13"
151 5.9"
105
5 0.2"
121.7
4.79"
EF205-210
122.8
10 0.39"
5 0.2"
43.8 1.72"
EF370-380
C2 | ABB
20
0.79"
43.8 1.72"
35 1.38"
5 0.2"
121.7
4.79"
2CDC107040C0201
Ø 0.43"
2CDC232005F0012
Ø 11
14 0.55"
22.8
0.9"
122
5 0.2"
30 1.18"
6.4"
0.7"
4.83"
4.59"
163.6
17.9
93.8 3.69"
0.29"
0.4'
7.4
116.5
4.13"
11 0.43"
105
EF205, EF370 electronic overload relays
Technical data
Main circuit – Utilization characteristics according to IEC/EN
Type
Standards
Rated operational voltage Ue
Rated frequency
Trip class
Number of poles
Duty time
Operating frequency without early tripping
Rated impulse withstand voltage Uimp
Rated insulation voltage Ui
EF205, EF370
IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1
1000 V AC
50/60 Hz
10E, 20E, 30E, selectable
3
100 %
Up to 15 operations/h, see "Technical diagram – Intermittent periodic duty"
8 kV
1000 V
Auxiliary circuit according to IEC/EN
Type
Rated operational voltage Ue
Conventional free air thermal current Ith
Rated frequency
Number of poles
Ie / Rated operational current AC-15
acc. to IEC/EN 60947-5-1 for utilization category
110-120 V
220-230-240 V
400 V
480-500 V
Ie / Rated operational current DC-13
acc. to IEC/EN 60947-5-1 for utilization category
24 V
60 V
110-120-125 V
250 V
Minimum switching capacity
Short-circuit protective device
Rated impulse withstand voltage Uimp
Rated insulation voltage Ui
EF205, EF370
600 V AC / DC
6A
DC, 50/60 Hz
1 N.C. + 1 N.O.
50/60 Hz
50/60 Hz
50/60 Hz
50/60 Hz
3.00
3.00
1.10
0.75
A
A
A
A
1.50 A
0.55 A
0.55 A
0.27 A
12 V / 3 mA
6 A, Fuse type gG
6 kV
690 V
Technical diagram – Intermittent periodic duty
(Op/h)
140
100
ta =
0.5
80
=
60
ta = 5
s
40
60
80 100 (%)
duty ratio
2CDC232005F0211
20
20
s
1.5
s
3s
ta =
0
1
ta =
40
0
s
ta
switching frequency
120
2CDC107040C0201
ta: Motor starting time
ABB | C3
EF205, EF370 electronic overload relays
Technical data
Main circuit – Utilization characteristics according to UL/CSA
Type
Standards
Maximum operational voltage
Trip rating
Full load amps (FLA)
Short-circuit rating RMS symmetrical
Short-circuit protective device
EF205, EF370
UL 508, CSA 22.2 No. 14, UL
600 V AC
125 % of FLA
See table "Full load amps and
See table "Full load amps and
See table "Full load amps and
60947-4-1A
short-circuit protective device"
short-circuit protective device"
short-circuit protective device"
Auxiliary circuit according to UL/CSA
Type
Contact rating
N.C., 95-96
N.O., 97-98
Conventional thermal current
EF205, EF370
B600, Q600
B600, Q600
6A
Full load amps and short-circuit protective device
Type
210 A
380 A
Short-circuit protective device
480 V AC
SCCR
Fuse type
10 kA
400 A, R5/RK5
18 kA
800 A, L/T
600 V AC
SCCR
10kA
18kA
Fuse type
400 A, R5/RK5
800 A, L/T
SCCR
100 kA
-
Fuse type
400 A, J
-
2CDC107040C0201
EF205-210
EF370-380
Full load amps (FLA)
C4 | ABB
EF205, EF370 electronic overload relays
Technical data
General data
Type
Pollution degree
Phase loss sensitive
Ambient air temperature
Operation
Open - compensated acc. to IEC/EN 60947-4-1
Storage
Ambient air temperature compensation
Maximum operating altitude permissible
Resistance to shock acc. to IEC 60068-2-27
Resistance to vibrations acc. to IEC 60068-2-6
Mounting position
Mounting
housing
Degree of protection
EF205, EF370
3
Yes
-25 ... +70 °C
-50 ... +85 °C
Acc. to IEC/EN 60947-4-1
2000 m
25 g / 11 ms
5 g / 3 … 150 Hz
Position 1-6
Mount on the contactor and tighten the screws of the main circuit terminals
IP20
main circuit terminals IP00
Electrical connection
Main circuit
Type
Connecting capacity
Rigid
Flexible
Lugs
Bars
Stranded acc. to UL/CSA
Flexible acc. to UL/CSA
1x
2x
1x
2x
L≤
Ø>
1x
2x
1x
2x
Stripping length
Tightening torques
Connection screw
Auxiliary circuit
Type
Connecting capacity
EF370
16 ... 185 mm²
16 ... 120 mm²
16 ... 185 mm²
16 ... 120 mm²
24 mm
8 mm
AWG 6-0000
AWG 6-0000
AWG 6-0000
AWG 6-0000
18 Nm / 160 lb.in
M8
50 ... 240 mm²
50 ... 150 mm²
50 ... 240 mm²
50 ... 150 mm²
32 mm
10 mm
AWG 1-500 kcmil
AWG 1-500 kcmil
AWG 1-500 kcmil
AWG 1-500 kcmil
28 Nm / 247 lb.in
M10
EF205, EF370
1 or 2 x
1 or 2 x
1 or 2 x
1 or 2 x
1 or 2 x
1 or 2 x
1 ... 4 mm²
0.75 ... 2.5 mm²
0.75 ... 2.5 mm²
0.75 ... 2.5 mm²
AWG 18-10
AWG 18-10
9 mm
0.8 ... 1.2 Nm / 7 ... 11 Ib.in
M3.5 (Pozidriv 2)
2CDC107040C0201
Rigid
Flexible with ferrule
Flexible with insulated ferrule
Flexible
Stranded acc. to UL/CSA
Flexible acc. to UL/CSA
Stripping length
Tightening torques
Connection screw
EF205
ABB | C5