Overview of the 3LD main control and EMERGENCY STOP switches

The 3LD main control and EMERGENCY STOP switches are manually operated switch disconnectors according to IEC 60947-3/VDE 0660 Part 107 (EN 60947-3) and comply with the conditions for switch disconnectors.

In EN 60204-1 (VDE 0113 Part 1), main control switches are called "disconnector units",

while EMERGENCY-STOP switches are termed "devices for emergency shutdown". The 3LD switches for 16 to 250 A are approved according to UL 508 and can be used as "Manual Motor Controllers" and "Motor Disconnects".

In addition, the 3LD switch disconnectors have CCC certification.

Maintenance personnel can protect themselves against unauthorized startup with padlocks (up to three can be fitted). The 3LD switches can be used in any mounting position.

Rated current In

16 A

25 A

Type series

3LD30

3LD20

3LD31

3LD21

Operating mechanism, red/yellow

127959379851_Thumbnail.png
127952659083_Thumbnail.png
127960071051_Thumbnail.png
127952800139_Thumbnail.png

Operating mechanism, black

127959994251_Thumbnail.png
127952710283_Thumbnail.png
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Mounting type

Front mounting

  • Center-hole mounting

  • Four-hole mounting

--

--

Floor mounting

  • Center-hole mounting

  • Four-hole mounting

--

--

Types of use

Distribution board mounting

Molded-plastic enclosure

--

--

DC isolator

--

--

--

--

Selector switch

--

--

--

Technical features

Number of poles

  • 3-pole

  • 4-pole

  • 6-pole

--

--

--

Short-circuit behavior

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

kA rms

6

50

6

50

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

A

500

340

500

640

Endurance mechanical (operating cycles)

100000

100000

100000

100000

Switching frequency

1/h

50

50

50

50

Conductor cross-sections for main conductors 1)

  • Solid or stranded

mm2

1 x (2.5 ... 16 mm2)

1 ... 6

1 x (2.5 ... 16 mm2)

1.5 ... 16

  • Finely stranded with end sleeve (max.)

mm2

1 x (2.5 ... 16 mm2)

4

1 x (2.5 ... 16 mm2)

10

  • Conductor cross-sections

AWG

14 ... 6

18 ... 10

14 ... 6

14 ... 8

  • Torque for terminal

Nm

3

1.5 ... 2

3

2 ... 2.5

Accessories

Auxiliary switches

  • 1 NO + 1 NC

  • 2 NO

--

--

Further accessories

  • 4th pole

--

  • N or PE terminal

1) Depending on the cable infeed, only small cross-sections are possible with 3LD2 devices in molded-plastic enclosures.

✓ Available

-- Not available

Rated current In

32 A

40 A

63 A

Type series

3LD32

3LD22

3LD33

3LD34

3LD25

Operating mechanism, red/yellow

127975775883_Thumbnail.png
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Operating mechanism, black

127975801483_Thumbnail.png
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127975839883_Thumbnail.png
127975878283_Thumbnail.png
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Mounting type

Front mounting

  • Center-hole mounting

  • Four-hole mounting

--

--

--

Floor mounting

  • Center-hole mounting

--

  • Four-hole mounting

--

--

--

Types of use

Distribution board mounting

Molded-plastic enclosure

--

--

--

DC isolator

--

--

--

--

Selector switch

--

--

--

Technical features

Number of poles

  • 3-pole

  • 4-pole

  • 6-pole

--

--

--

Short-circuit behavior

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

kA rms

6

50

6

6

50

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

A

500

640

1000

1000

1260

Endurance mechanical (operating cycles)

100000

100000

100000

100000

100000

Switching frequency

1/h

50

50

50

50

50

Conductor cross-sections for main conductors 1)

  • Solid or stranded

mm2

1 x (2.5 ... 16 mm2)

1.5 ... 16

1 x (2.5 ... 16 mm2)

1 x (2.5 ... 16 mm2)

2.5 ... 35

  • Finely stranded with end sleeve (max.)

mm2

1 x (2.5 ... 16 mm2)

10

1 x (2.5 ... 16 mm2)

1 x (2.5 ... 16 mm2)

16

  • Conductor cross-sections

AWG

14 ... 6

14 ... 8

14 ... 6

14 ... 6

14 ... 6

  • Torque for terminal

Nm

3

2 ... 2.5

3

3

2.5 ... 3

Accessories

Auxiliary switches

  • 1 NO + 1 NC

  • 2 NO

--

--

--

Further accessories

  • 4th pole

  • N or PE terminal

1) Depending on the cable infeed, only small cross-sections are possible with 3LD2 devices in molded-plastic enclosures.

✓ Available

-- Not available

Rated current In

100 A

125 A

160 A

250 A

Type series

3LD27

3LD28

3LD23

3LD24

Operating mechanism, red/yellow

127958893451_Thumbnail.png
127959187851_Thumbnail.png
127953350539_Thumbnail.png
127953350539_Thumbnail.png

Operating mechanism, black

127959034251_Thumbnail.png
127959315851_Thumbnail.png
127956665739_Thumbnail.png
127956665739_Thumbnail.png

Mounting type

Front mounting

  • Center-hole mounting

--

--

--

--

  • Four-hole mounting

Floor mounting

  • Center-hole mounting

--

--

--

--

  • Four-hole mounting

Types of use

Distribution board mounting

Molded-plastic enclosure

--

--

DC isolator

--

--

--

--

Selector switch

--

Technical features

Number of poles

  • 3-pole

  • 4-pole

--

--

  • 6-pole

--

--

Short-circuit behavior

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

kA rms

50

20

50

50

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

A

2000

2000

4000

4000

Endurance mechanical (operating cycles)

100000

100000

100000

100000

Switching frequency

1/h

50

50

50

50

Conductor cross-sections for main conductors1)

  • Solid or stranded

mm2

4 ... 50

4 ... 50

4 ... 50

4 ... 50

  • Finely stranded with end sleeve (max.)

mm2

35

35

150

150

  • Conductor cross-sections

AWG

12 ... 1

12 ... 1

1 ... MCM400

  • Torque for terminal

Nm

2.5 ... 3

2.5 ... 3

9.5 ... 10

9.5 ... 10

Accessories

Auxiliary switches

  • 1 NO + 1 NC

  • 2 NO

Further accessories

  • 4th pole

  • N or PE terminal

1) Depending on the cable infeed, only small cross-sections are possible with 3LD2 devices in molded-plastic enclosures.

✓ Available

-- Not available