Technical specifications 3LD2

General technical details

Standards

DIN VDE 0660, IEC 60947

Circuit breaker

Type

3LD20

3LD21

3LD22

3LD25

3LD27

3LD28

3LD23

3LD24

Rated insulation voltage Ui

V

690

Rated operational voltage Ue

V AC

690

Rated frequency

Hz

50 ... 60

Rated impulse withstand voltage Uimp

kV

6

6

6

6

6

6

6

6

Rated short-time withstand current (1 s current, rms value)

A

340

640

640

1260

2000

2000

4000

4000

Short-circuit protection, max. back-up fuse (gL)

A

20

25

40

63

100

125

160

250

Rated conditional short-circuit current with upstream fuses at 50/60 Hz, 690 V AC

kA

50

50

50

50

50

20

50

50

Maximum permissible let-through I2t value

kA2s

2.5

4

9

21

64

104

185

557

Permissible let-through current of the fuse

kA

3

3.5

4.5

6

10

10

15

15

Rated uninterrupted current Iu

A

16

25

32

63

100

125

160

250

AC-21A load break switch

Rated operational current Ie

A

16

25

32

63

100

125

160

250

AC-3 motor load switch, operational switching of individual motors

Rated operational power

At 220 ... 240 V

kW

3.0

4.0

5.5

11.0

18.5

22.0

35.0

55.0

At 380 ... 440 V

kW

5.5

7.5

9.5

18.5

30.0

37.0

50.0

110.0

At 660/690 V

kW

5.5

7.5

9.5

15.0

22.0

30.0

37.0

45.0

AC-23A main control switch

Repair switch

Frequent, but not operational switching of individual motors

Rated operational power

At 220 ... 240 V

kW

4.0

5.0

6.0

11.0

18.5

22.0

45.0

75.0

At 380 ... 440 V

kW

7.5

9.5

11.5

22.0

37.0

45.0

75.0

132.0

At 660/690 V

kW

7.5

9.5

11.5

18.5

30.0

37.0

45.0

55.0

Power loss per current path at Ie

W

0.5

1.1

1.8

4.5

7.5

12.0

36.0

36.0

Endurance

Mechanical

Operating cycles

100 000

Switching frequency

1/h

50

Permissible ambient temperature

°C

-25 ... +55

Isolating features

Up to max.

V

690

Conductor cross-sections for main conductors 1)

Standards

DIN VDE 0660, IEC 60947

Circuit breaker

Type

3LD20

3LD21

3LD22

3LD25

3LD27

3LD28

3LD23

3LD24

Solid or stranded

mm2

1 ... 6

1.5 ... 16

1.5 ... 16

2.5 ... 35

4 ... 50

4 ... 50

16 ... 185

16 ... 185

Finely stranded with end sleeve (max.)

mm2

4

10

10

16

35

35

150

150

Conductor cross-sections

Copper cable

AWG

18 ... 10

14 ... 8

14 ... 8

14 ... 6

12 ... 1

12 ... 1

--

--

Torque for terminal

Nm

1.5 ... 2

2 ... 2.5

2 ... 2.5

2.5 ... 3

2.5 ... 3

2.5 ... 3

9.5 ... 10

9.5 ... 10

Touch protection according to EN 50274

Yes

1) Depending on the cable infeed, only small cross-sections are possible with devices in molded-plastic enclosures.

Auxiliary switches

Standards

DIN VDE 0660, IEC 60947

Circuit breaker

Type

3LD20

3LD21

3LD22

3LD25

3LD27

3LD28

3LD23

3LD24

Rated insulation voltage Ui

V

500

Rated operational voltage Ue

V AC

500

Rated uninterrupted current Iu

A

10

Rated operational current Ie, AC-15

At 120 V

A

6

At 220 ... 240 V

A

3

At 380 ... 415 V

A

1.8

At 500 V

A

1.4

Short-circuit protection, auxiliary switch, max. back-up fuse (gL/gG)

A

10

Conductor cross-sections for auxiliary conductors

Standards

DIN VDE 0660, IEC 60947

Circuit breaker

Type

3LD20

3LD21

3LD22

3LD25

3LD27

3LD28

3LD23

3LD24

Connection type

Screw terminals

Solid or stranded

mm2

2 × (0.75 ... 2.5), 1 × 4

Finely stranded with end sleeve

mm2

2 × (0.75 ... 1.5), 1 x 2.5

Torque for terminal

Nm

0.8