3KD, 6-pole for DC applications up to 1200 V, sizes 3 to 5

General technical details

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36

3KD38

3KD40

3KD42

3KD44

3KD46

3KD48

3KD50

3KD52

3KD54

Size

3

3

3

3

4

4

4

5

5

5

Rated uninterrupted current (IU)

A

200

250

315

400

500

630

800

1000

1250

1600

Conventional free-air thermal current Ith1)

A

200

250

315

400

500

630

800

1000

1250

1600

Rated operational voltage (Ue)

  • At DC – pollution degree 2

V

1200

1200

1200

1200

1200

1200

1200

1200

1200

1200

  • At DC – pollution degree 3

V

1200

1200

1200

1200

1000

1000

1000

1200

1200

1200

Rated insulation voltage (Ui)

  • At DC – pollution degree 2

V

1250

1250

1250

1250

1250

1250

1250

1250

1250

1250

  • At DC – pollution degree 3

V

1250

1250

1250

1250

1000

1000

1000

1250

1250

1250

Rated impulse withstand voltage (Uimp)

kV

12

Overvoltage category

IV

1) Configuring note: Max. permissible operating temperature at connections 110 °C

Operating and short-circuit behavior

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36

3KD38

3KD40

3KD42

3KD44

3KD46

3KD48

3KD50

3KD52

3KD54

Rated operational current Ie 1)

  • DC-21A, 1200 V

A

--

--

--

--

--

--

--

--

--

--

  • DC-21B, 1200 V

A

200

250

315

400

500

630

800

1000

1250

1600

Short-time withstand current Icw
(t=1s, rms value, 1200 V DC)

kA

10

10

10

10

20

20

20

20

20

20

Short-circuit making capacity (Icm)

kA

14.2

14.2

14.2

14.2

28.4

28.4

28.4

28.4

28.4

28.4

Power loss per pole with thermal current Ith

W

4

6

10

14

12

17

25

20

32

57

Service life, operating cycles

Mechanical

10000

10000

10000

10000

8000

8000

8000

6000

6000

6000

Electrical, at DC-21A, 1200 V

200

200

200

200

100

100

100

100

100

100

1) For sizes 3 and 4, phase barriers or contact connection covers (accessories) are required when connecting cable lugs.

Main conductor connection

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36

3KD38

3KD40

3KD42

3KD44

3KD46

3KD48

3KD50

3KD52

3KD54

Conductor cross-section, max.

mm2

240

2 x 240

2 x 240

Busbar systems, max. dimensions (number x width x thickness)

  • Flat terminals

mm

1 x 30 x 10

2 x 40 x 5

2 x 60 x 10

  • Box terminals

mm

--

--

--

Tightening torque

  • Flat terminals

Nm

30 ... 44

50 ... 75

50 ... 75

  • Box terminals

Nm

--

--

--

Other properties

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36

3KD38

3KD40

3KD42

3KD44

3KD46

3KD48

3KD50

3KD52

3KD54

Degree of protection

  • With masking plate without cable connection cover

IP20

IP20

IP20

IP20

IP20

IP20

IP20

IP20

IP20

IP20

  • Without masking plate or terminal cover

IP00

IP00

IP00

IP00

IP00

IP00

IP00

IP00

IP00

IP00

Ambient conditions

  • During operation

°C

-25 ... +70 (no derating of Ith at -5 to +40 °C)

  • During storage

°C

-50 ... +80

  • Mounting position

Any