ABB EF45-30 Data Sheet

Data sheet

Electronic overload relay EF19 and EF45

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.

2CDC231011V0013

2CDC231010V0013

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

EF19, EF45 screw terminal
For AF09 … AF38 block contactors

Setting
range

A

0.10 ... 0.32 EF19-0.32 1SAX121001R1101 AF09 ... AF38 1 0.158

0.30 ... 1.00 EF19-1.0 1SAX121001R1102 AF09 ... AF38 1 0.158

0.80 ... 2.70 EF19-2.7 1SAX121001R1103 AF09 ... AF38 1 0.158

1.90 ... 6.30 EF19-6.3 1SAX121001R1104 AF09 ... AF38 1 0.158

5.70 ... 18.9 EF19-18.9 1SAX121001R1105 AF09 ... AF38 1 0.158

9.00 ... 30.0 EF45-30 1SAX221001R1101 AF26 ... AF38 1 0.362

15.0 ... 45.0 EF45-45 1SAX221001R1102 AF26 ... AF38 1 0.362

Type Order code Suitable for Packing

unit

PCE

Weight
per PCE

kg

Accesso­ries

Single

mounting kit

Type Order code Suitable for Packing

unit

PCE
DB19EF 1SAX101910R1001 EF19 1 0.046

DB45EF 1SAX201910R0001 EF45 1 0.100

Weight
per PCE

kg

Suitable for mounting on:
AF09, AF12, AF16
AF26, AF30, AF38

Functional description

1

Terminals 1L1, 3L2, 5L3

2

Sealable operating elements

3

Trip class 10E, 20E, 30E selectable

4

RESET - Automatic or manual reset selectable

5

TEST - Status indication

6

Signaling contacts 97-98

7

Terminals 2T1, 4T2, 6T3

8

STOP

9

Current setting range / Self-test function ST

Adjustable current setting for overload protection

10

Tripping contacts 95-96

2CDC232013F0013

1

2

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

1~

2CDC232013F0012

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

50/60 Hz

3~

2CDC232005F0013

Contact 95-96 Contact 97-98 Opto-mechanical slide Comment

Wiring diagram

2T1 4T2 6T3

RESET

A

M

TEST

STOP

9795

9896

2CDC232001F0009

2 - 2CDC107025D0201

Resistance and power loss per pole and short-circuit protective devices

switching frequency

Trip class 10E

Trip class 20E

switching frequency

Trip class 30E

14

0.55"

14

0.55"

Type Setting range Resistance per

pole

lower value

A

upper value

A

mΩ

EF19-0.32 0.1 0.32 447

EF19-1.0 0.3 1 54

EF19-2.7 0.8 2.7 7.9

EF19-6.3 1.9 6.3 2.1

EF19-18.9 5.7 18.9 0.85

EF45-30 9 30 0.26

EF45-45 15 45 0.26

Intermittent periodic duty

(Op/h)

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

duty ratio

(%)

(Op/h)

80

t = 2 s

a

70

60

50

40

t = 4 s

a

30

switching frequency

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

duty ratio

(%)

Power loss per pole Short-circuit

protective devices

at lower value Wat upper value Wcoordination type 2

0.004 0.046

0.005 0.054

0.005 0.058

0.008 0.083

0.028 0.304

0.021 0.234

0.059 0.527

(Op/h)

50

t = 5 s

a

45

40

35

30

25

t = 10 s

a

20

15

t = 15 s

a

10

t = 20 s

a

t = 25 s

a

5

0

0 20 40 60 80 100

2CDC232002F0214

duty ratio

(%)

Fuse 1 A, Type gG

Fuse 4 A, Type gG

Fuse 10 A, Type gG

Fuse 20 A, Type gG

Fuse 50 A, Type gG

Fuse 160 A, Type gG

Fuse 160 A, Type gG

2CDC232003F0214

Trip class 10E Trip class 20E Trip class 30E

Dimensions

15.73

0.62"

8.2

0.32"

EF19 EF45

10.3

44.4 1.75"

0.41"

11.78

0.46"

1.2 0.05"

85 3.35"

5.65

14

0.55"

0.22"

38.8

1.53"

37.5 1.48"

55.4 2.18"

29.3 2.33"

2.3

0.09"

0.33"

10.3

8.5

2CDC232007F0009

0.41"

45 1.77"

2 0.08"

104.7 4.12"

5.65

14

0.55"

0.22"

59.5

56.5 2.22"

2.34"

82.1 3.23"

86 3.39"

3.4

0.13"

2CDC232008F0009

2CDC107025D0201 - 3