3KD, 3/4-pole, sizes 3 to 5

General technical details

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36..-.P

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 Ith 1)

A

200

250

315

400

500

630

800

1000

1250

1600

Rated operational voltage (Ue)

  • At 50/60 Hz AC (tolerance up to +10% permissible)

V

690

  • At DC – 2 conducting paths series-connected

V

220

  • At DC – 3 conducting paths series-connected

V

440

Rated insulation voltage (Ui)

V

1000

Rated impulse withstand voltage (Uimp)

kV

12

Overvoltage category with pollution degree 3

IV

1) Configuring note: Max. permissible operating temperature at connections 125 °C

Operating and short-circuit behavior

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36..-.P

3KD38

3KD40

3KD42

3KD44

3KD46

3KD48

3KD50

3KD52

3KD54

Rated operating current Ie 1)2)

  • AC-21A, at AC-22A, at 400 … 690 V

A

200

250

315

400

500

630

800

1000

1250

1600

  • AC-23A, at 400 V

A

200

250

315

400

500

630

800

1000

1250

1600

  • AC-23A, at 500 V

A

200

250

315

350

500

630

800

1000

1250

1600

  • AC-23A, at 690 V

A

200

250

315

315

500

630

800

1000

1250

1600

  • DC-21A, 220/440 V

A

200

250

315

400

500

630

800

1000

1250

1600

  • DC-22A, 220/440 V

A

200

250

315

400

500

630

800

--

--

--

  • DC-23A, 220/440 V

A

200

250

315

400

500

630

800

--

--

--

Motor switching capacity AC-23A3)

  • At 400 V

kW

110

132

160

200

250

355

400

560

710

900

  • At 500 V

kW

132

160

200

250

355

400

560

710

900

1000

  • At 690 V

kW

185

220

315

315

500

630

800

1000

1000

1000

Short-time withstand current Icw
(t = 1 s, rms value, 690 V AC/440 V DC)

kA

13

13

13

13

30

30

30

50

50

50

Short-circuit making capacity (Icm)

kA

26

26

26

26

63

63

63

105

105

105

Rated current of upstream fuse 4)5)

A

250

250

400

400

630

630

800

1000

1250

1600

Rated conditional short-circuit current with upstream fuses4)

  • At 400/500 V AC

kA

100

100

65

65

100

100

100

100

80

80

  • At 690 V AC

kA

65

65

35

35

65

65

50

--

--

--

Let-through current combined with upstream fuse 4)

  • At 400/500 V AC

kA

25.1

25.1

35.2

35.2

61.6

61.6

63.7

95.9

103.4

110

  • At 690 V AC

kA

22.7

22.7

27.96

27.96

54.5

54.5

70.4

--

--

--

Let-through I2t combined with upstream fuse 4)

  • At 400/500 V

kA2s

427

427

1165

1165

3687

3687

7471

15400

25960

30900

  • At 690 V

kA2s

348

348

1157

1157

4450

4450

10300

--

--

--

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 AC-23 A, 690 V/50 ... 60 Hz

1000

1000

1000

1000

1000

1000

500

500

500

500

Electrical, at DC-23 A, 220/440 V

1000

1000

1000

1000

1000

1000

500

500

500

500

1) For size 3, phase barriers or contact connection covers (accessories) are required for busbar systems (AC-21A, AC-22A, and Ue>400 V, AC-23A) and when connecting cable lugs.

2) With size 4 at AC-23A, terminal covers must be installed (accessories).

3) Values are provided as a guide only and may vary depending on the make of motor.

4) Valid for the combination of 3KD and fuse type 3NA…, characteristic gG

5) Maximum rated current of the upstream fuse; a fuse with a lower rated current can also be used.

Main conductor connection

Standards

IEC 60947-1, IEC 60947-3

Type

3KD36..-.P

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

1 x 30 x 10

2 x 40 x 5

2 x 60 x 10

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..-.P

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 +55 °C)

  • During storage

°C

-50 ... +80

  • Mounting position 1)

Any

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