Switch disconnectorsSwitch disconnectors
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 |
|||||
Operating mechanism, black |
|||||
Mounting type |
|||||
Front mounting |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
✓ |
|
Floor mounting |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
✓ |
|
Types of use |
|||||
Distribution board mounting |
✓ |
✓ |
✓ |
✓ |
|
Molded-plastic enclosure |
-- |
✓ |
-- |
✓ |
|
DC isolator |
-- |
-- |
-- |
-- |
|
Selector switch |
-- |
-- |
-- |
✓ |
|
Technical features |
|||||
Number of poles |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
|
|
-- |
-- |
-- |
✓ |
|
Short-circuit behavior |
|||||
|
kA rms |
6 |
50 |
6 |
50 |
|
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) |
|||||
|
mm2 |
1 x (2.5 ... 16 mm2) |
1 ... 6 |
1 x (2.5 ... 16 mm2) |
1.5 ... 16 |
|
mm2 |
1 x (2.5 ... 16 mm2) |
4 |
1 x (2.5 ... 16 mm2) |
10 |
|
AWG |
14 ... 6 |
18 ... 10 |
14 ... 6 |
14 ... 8 |
|
Nm |
3 |
1.5 ... 2 |
3 |
2 ... 2.5 |
Accessories |
|||||
Auxiliary switches |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
✓ |
|
Further accessories |
|||||
|
✓ |
-- |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
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 |
||||||
Operating mechanism, black |
||||||
Mounting type |
||||||
Front mounting |
||||||
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
-- |
✓ |
|
Floor mounting |
||||||
|
✓ |
✓ |
-- |
✓ |
✓ |
|
|
-- |
✓ |
-- |
-- |
✓ |
|
Types of use |
||||||
Distribution board mounting |
✓ |
✓ |
✓ |
✓ |
✓ |
|
Molded-plastic enclosure |
-- |
✓ |
-- |
-- |
✓ |
|
DC isolator |
-- |
✓ |
-- |
-- |
-- |
|
Selector switch |
-- |
✓ |
-- |
-- |
✓ |
|
Technical features |
||||||
Number of poles |
||||||
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
-- |
✓ |
|
Short-circuit behavior |
||||||
|
kA rms |
6 |
50 |
6 |
6 |
50 |
|
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) |
||||||
|
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 |
|
mm2 |
1 x (2.5 ... 16 mm2) |
10 |
1 x (2.5 ... 16 mm2) |
1 x (2.5 ... 16 mm2) |
16 |
|
AWG |
14 ... 6 |
14 ... 8 |
14 ... 6 |
14 ... 6 |
14 ... 6 |
|
Nm |
3 |
2 ... 2.5 |
3 |
3 |
2.5 ... 3 |
Accessories |
||||||
Auxiliary switches |
||||||
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
-- |
✓ |
-- |
-- |
✓ |
|
Further accessories |
||||||
|
✓ |
✓ |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
✓ |
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 |
|||||
Operating mechanism, black |
|||||
Mounting type |
|||||
Front mounting |
|||||
|
-- |
-- |
-- |
-- |
|
|
✓ |
✓ |
✓ |
✓ |
|
Floor mounting |
|||||
|
-- |
-- |
-- |
-- |
|
|
✓ |
✓ |
✓ |
✓ |
|
Types of use |
|||||
Distribution board mounting |
✓ |
✓ |
✓ |
✓ |
|
Molded-plastic enclosure |
✓ |
✓ |
-- |
-- |
|
DC isolator |
-- |
-- |
-- |
-- |
|
Selector switch |
✓ |
-- |
✓ |
✓ |
|
Technical features |
|||||
Number of poles |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
-- |
-- |
✓ |
✓ |
|
|
-- |
-- |
✓ |
✓ |
|
Short-circuit behavior |
|||||
|
kA rms |
50 |
20 |
50 |
50 |
|
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) |
|||||
|
mm2 |
4 ... 50 |
4 ... 50 |
4 ... 50 |
4 ... 50 |
|
mm2 |
35 |
35 |
150 |
150 |
|
AWG |
12 ... 1 |
12 ... 1 |
1 ... MCM400 |
|
|
Nm |
2.5 ... 3 |
2.5 ... 3 |
9.5 ... 10 |
9.5 ... 10 |
Accessories |
|||||
Auxiliary switches |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
|
Further accessories |
|||||
|
✓ |
✓ |
✓ |
✓ |
|
|
✓ |
✓ |
✓ |
✓ |
1) Depending on the cable infeed, only small cross-sections are possible with 3LD2 devices in molded-plastic enclosures.
✓ Available
-- Not available