2CD

C10

7040

C02

01

C2 | ABB

EF205, EF370 electronic overload relays63 to 380 A

DescriptionThe 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.

Ordering detailsSetting range Short-circuit

protective device Trip class Type Order code Weight

(1 pce)A kg63 ... 210 1250 A, Fuse type gG 10E, 20E, 30E EF205-210 1SAX531001R1101 1.210

115 ... 380 1600 A, Fuse type gG 10E, 20E, 30E EF370-380 1SAX611001R1101 1.430

2CD

C23

1010

V00

12

EF205-210

2CD

C23

1013

V00

12

EF370-380

Main dimensions mm, inches

105 4.13"

7.4 0.29" 17.9 0.7"

18.5

0.

73"

5 0.

2"

11

0.43

"

122

4.

8"

151

5.

9"10

0.

39"

17.5 0.69"

35 1.38"

Ø 8.5 Ø 0.33"

10

0.39

"

30 1.18" 5 0.2"

116.5 4.59"

122.8 4.83"

5 0.2"35 1.38"

121.7 4.79"35 1.38"

2CD

C23

2004

F001

2

EF205-210

122.8 4.83"

30 1.18"

116.5 4.59"

5 0.2"

35 1.38" 5 0.2"

121.7 4.79"

14

0.55

"16

3.6

6.

4"10

0.

39"

22.8

0.

9"

93.8

3.

69"

7.4 0.29"

105 4.13"

17.9 0.7"

20 0.79"

43.8 1.72"43.8 1.72"

Ø 11 Ø 0.43"

11

0.43

"

122

0.

4'5 0

.2"

2CD

C23

2005

F001

2

EF370-380

2CD

C10

7040

C02

01

ABB | C3

Main circuit – Utilization characteristics according to IEC/EN

Type EF205, EF370

Standards IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1Rated operational voltage Ue 1000 V ACRated frequency 50/60 HzTrip class 10E, 20E, 30E, selectableNumber of poles 3Duty time 100 %Operating frequency without early tripping Up to 15 operations/h, see "Technical diagram – Intermittent periodic duty"Rated impulse withstand voltage Uimp 8 kVRated insulation voltage Ui 1000 V

Auxiliary circuit according to IEC/EN

Type EF205, EF370Rated operational voltage Ue 600 V AC / DCConventional free air thermal current Ith 6 ARated frequency DC, 50/60 HzNumber of poles 1 N.C. + 1 N.O.Ie / Rated operational current AC-15acc. to IEC/EN 60947-5-1 for utilization category

110-120 V 50/60 Hz 3.00 A220-230-240 V 50/60 Hz 3.00 A400 V 50/60 Hz 1.10 A480-500 V 50/60 Hz 0.75 A

Ie / Rated operational current DC-13acc. to IEC/EN 60947-5-1 for utilization category

24 V 1.50 A60 V 0.55 A110-120-125 V 0.55 A250 V 0.27 A

Minimum switching capacity 12 V / 3 mAShort-circuit protective device 6 A, Fuse type gGRated impulse withstand voltage Uimp 6 kVRated insulation voltage Ui 690 V

Technical diagram – Intermittent periodic duty

140

120

0

20

40

60

80

100

0 20 40 60 80 100 (%)

t = 1 s

a

t = 1.5 s

a

t = 3 sa

t = 5 sa

t = 0.5 sa

duty ratio

switc

hing

freq

uenc

y

(Op/h)

2CD

C23

2005

F021

1

ta: Motor starting time

EF205, EF370 electronic overload relaysTechnical data

2CD

C10

7040

C02

01

C4 | ABB

Main circuit – Utilization characteristics according to UL/CSA

Type EF205, EF370Standards UL 508, CSA 22.2 No. 14, UL 60947-4-1AMaximum operational voltage 600 V ACTrip rating 125 % of FLAFull load amps (FLA) See table "Full load amps and short-circuit protective device"Short-circuit rating RMS symmetrical See table "Full load amps and short-circuit protective device"Short-circuit protective device See table "Full load amps and short-circuit protective device"

Auxiliary circuit according to UL/CSA

Type EF205, EF370Contact rating N.C., 95-96 B600, Q600

N.O., 97-98 B600, Q600Conventional thermal current 6 A

Full load amps and short-circuit protective device

Type Full load amps (FLA) Short-circuit protective device

480 V AC 600 V ACSCCR Fuse type SCCR Fuse type SCCR Fuse type

EF205-210 210 A 10 kA 400 A, R5/RK5 10kA 400 A, R5/RK5 100 kA 400 A, JEF370-380 380 A 18 kA 800 A, L/T 18kA 800 A, L/T - -

EF205, EF370 electronic overload relaysTechnical data

2CD

C10

7040

C02

01

ABB | C5

General data

Type EF205, EF370Pollution degree 3Phase loss sensitive YesAmbient air temperature

Operation Open - compensated acc. to IEC/EN 60947-4-1 -25 ... +70 °CStorage -50 ... +85 °C

Ambient air temperature compensation Acc. to IEC/EN 60947-4-1Maximum operating altitude permissible 2000 mResistance to shock acc. to IEC 60068-2-27 25 g / 11 msResistance to vibrations acc. to IEC 60068-2-6 5 g / 3 … 150 HzMounting position Position 1-6Mounting Mount on the contactor and tighten the screws of the main circuit terminalsDegree of protection housing IP20

main circuit terminals IP00

Electrical connection

Main circuitType EF205 EF370Connecting capacity

Rigid 1 x2 x

16 ... 185 mm²16 ... 120 mm²

50 ... 240 mm²50 ... 150 mm²

Flexible 1 x2 x

16 ... 185 mm²16 ... 120 mm²

50 ... 240 mm²50 ... 150 mm²

Lugs L ≤ 24 mm 32 mmBars Ø > 8 mm 10 mmStranded acc. to UL/CSA 1 x

2 xAWG 6-0000AWG 6-0000

AWG 1-500 kcmilAWG 1-500 kcmil

Flexible acc. to UL/CSA 1 x2 x

AWG 6-0000AWG 6-0000

AWG 1-500 kcmilAWG 1-500 kcmil

Stripping length - -Tightening torques 18 Nm / 160 lb.in 28 Nm / 247 lb.in

Connection screw M8 M10

Auxiliary circuitType EF205, EF370Connecting capacity

Rigid 1 or 2 x 1 ... 4 mm²Flexible with ferrule 1 or 2 x 0.75 ... 2.5 mm²Flexible with insulated ferrule 1 or 2 x 0.75 ... 2.5 mm²Flexible 1 or 2 x 0.75 ... 2.5 mm²Stranded acc. to UL/CSA 1 or 2 x AWG 18-10Flexible acc. to UL/CSA 1 or 2 x AWG 18-10

Stripping length 9 mmTightening torques 0.8 ... 1.2 Nm / 7 ... 11 Ib.inConnection screw M3.5 (Pozidriv 2)

EF205, EF370 electronic overload relaysTechnical data