3KD, 6-pole for DC applications up to 1200 V, sizes 1 and 2

General technical details

Standards

IEC 60947-1, IEC 60947-3

Type

3KD16

3KD22

3KD26

3KD28

3KD30

3KD32

3KD34

Size

1

1

1

2

2

2

2

Rated uninterrupted current (IU)

A

16

32

63

80

100

125

160

Conventional free-air thermal current Ith 1)

A

16

32

63

80

100

125

160

Rated operational voltage (Ue)

  • At DC – with pollution degree 2

V

1200

1200

1200

1200

1200

1200

1200

  • At DC – with pollution degree 3

V

1000

1000

1000

1000 2)

1000 2)

1000 2)

1000 2)

Rated insulation voltage (Ui)

  • At DC – with pollution degree 2

V

1250

1250

1250

1250

1250

1250

1250

  • At DC – with pollution degree 3

V

1000

1000

1000

1000 3)

1000 3)

1000 3)

1000 3)

Rated impulse withstand voltage (Uimp)

kV

8

8

8

8

8

8

8

Overvoltage category

III

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

2) Valid for version with box terminal, version with flat terminal max. 1200 V

3) Valid for version with box terminal, version with flat terminal max. 1250 V

Operating and short-circuit behavior

Standards

IEC 60947-1, IEC 60947-3

Type

3KD16

3KD22

3KD26

3KD28

3KD30

3KD32

3KD34

Rated operational current Ie

  • DC-21A, 1200 V

A

16

32

63

80

100

125

160

  • DC-21B, 1200 V

A

16

32

63

80

100

125

160

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

kA

3

3

3

4

4

4

4

Short-circuit making capacity (Icm)

kA

4.3

4.3

4.3

5.7

5.7

5.7

5.7

Power loss per pole with thermal current Ith

W

0.1

0.4

1

1.1

1.8

3.2

4.6

Service life, operating cycles

  • Mechanical

15000

15000

15000

15000

15000

15000

15000

  • Electrical, at DC-21, 1200 V

1500

1500

1500

1500

1500

1500

1500

Main conductor connection

Standards

IEC 60947-1, IEC 60947-3

Type

3KD16

3KD22

3KD26

3KD28

3KD30

3KD32

3KD34

Conductor cross-section, max.

mm2

35

35

35

70

70

70

70

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

  • Flat terminals

mm

--

1 x 20 x 3 1)

  • Box terminals

mm

1 x 9 x 2

1 x 14 x 3

Tightening torque

  • Flat terminals

Nm

--

15 ... 22

  • Box terminals

Nm

5 ... 6.5

6.5 ... 8

1) When using busbars that are 20 mm wide, these must be insulated.

Other properties

Standards

IEC 60947-1, IEC 60947-3

Type

3KD16

3KD22

3KD26

3KD28

3KD30

3KD32

3KD34

Degree of protection

  • With masking plate without cable connection cover

IP20

IP20

IP20

IP20

IP20

IP20

IP20

  • Without masking plate or terminal cover

IP20

IP20

IP20

IP00 2) / IP20

Ambient conditions

  • During operation

°C

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

  • During storage

°C

-50 ... +80

  • Mounting position 1)

Any

1) With mounting positions other than the vertical, please contact Technical Support.

2) Relevant only for devices with flat terminals