Switch disconnectorsSwitch disconnectors
Technical specifications 3LD2
General technical details
Standards |
DIN VDE 0660, IEC 60947 |
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Circuit breaker |
Type |
3LD20 |
3LD21 |
3LD22 |
3LD25 |
3LD27 |
3LD28 |
3LD23 |
3LD24 |
|
Rated insulation voltage Ui |
V |
690 |
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Rated operational voltage Ue |
V AC |
690 |
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Rated frequency |
Hz |
50 ... 60 |
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Rated impulse withstand voltage Uimp |
kV |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
|
Rated short-time withstand current (1 s current, rms value) |
A |
340 |
640 |
640 |
1260 |
2000 |
2000 |
4000 |
4000 |
|
Short-circuit protection, max. back-up fuse (gL) |
A |
20 |
25 |
40 |
63 |
100 |
125 |
160 |
250 |
|
Rated conditional short-circuit current with upstream fuses at 50/60 Hz, 690 V AC |
kA |
50 |
50 |
50 |
50 |
50 |
20 |
50 |
50 |
|
Maximum permissible let-through I2t value |
kA2s |
2.5 |
4 |
9 |
21 |
64 |
104 |
185 |
557 |
|
Permissible let-through current of the fuse |
kA |
3 |
3.5 |
4.5 |
6 |
10 |
10 |
15 |
15 |
|
Rated uninterrupted current Iu |
A |
16 |
25 |
32 |
63 |
100 |
125 |
160 |
250 |
|
AC-21A load break switch |
Rated operational current Ie |
A |
16 |
25 |
32 |
63 |
100 |
125 |
160 |
250 |
AC-3 motor load switch, operational switching of individual motors |
Rated operational power |
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At 220 ... 240 V |
kW |
3.0 |
4.0 |
5.5 |
11.0 |
18.5 |
22.0 |
35.0 |
55.0 |
|
At 380 ... 440 V |
kW |
5.5 |
7.5 |
9.5 |
18.5 |
30.0 |
37.0 |
50.0 |
110.0 |
|
At 660/690 V |
kW |
5.5 |
7.5 |
9.5 |
15.0 |
22.0 |
30.0 |
37.0 |
45.0 |
|
AC-23A main control switch Repair switch Frequent, but not operational switching of individual motors |
Rated operational power |
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At 220 ... 240 V |
kW |
4.0 |
5.0 |
6.0 |
11.0 |
18.5 |
22.0 |
45.0 |
75.0 |
|
At 380 ... 440 V |
kW |
7.5 |
9.5 |
11.5 |
22.0 |
37.0 |
45.0 |
75.0 |
132.0 |
|
At 660/690 V |
kW |
7.5 |
9.5 |
11.5 |
18.5 |
30.0 |
37.0 |
45.0 |
55.0 |
|
Power loss per current path at Ie |
W |
0.5 |
1.1 |
1.8 |
4.5 |
7.5 |
12.0 |
36.0 |
36.0 |
|
Endurance Mechanical |
Operating cycles |
100 000 |
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Switching frequency |
1/h |
50 |
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Permissible ambient temperature |
°C |
-25 ... +55 |
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Isolating features |
Up to max. |
V |
690 |
Conductor cross-sections for main conductors 1)
Standards |
DIN VDE 0660, IEC 60947 |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
Circuit breaker |
Type |
3LD20 |
3LD21 |
3LD22 |
3LD25 |
3LD27 |
3LD28 |
3LD23 |
3LD24 |
|
Solid or stranded |
mm2 |
1 ... 6 |
1.5 ... 16 |
1.5 ... 16 |
2.5 ... 35 |
4 ... 50 |
4 ... 50 |
16 ... 185 |
16 ... 185 |
|
Finely stranded with end sleeve (max.) |
mm2 |
4 |
10 |
10 |
16 |
35 |
35 |
150 |
150 |
|
Conductor cross-sections |
Copper cable |
AWG |
18 ... 10 |
14 ... 8 |
14 ... 8 |
14 ... 6 |
12 ... 1 |
12 ... 1 |
-- |
-- |
Torque for terminal |
Nm |
1.5 ... 2 |
2 ... 2.5 |
2 ... 2.5 |
2.5 ... 3 |
2.5 ... 3 |
2.5 ... 3 |
9.5 ... 10 |
9.5 ... 10 |
|
Touch protection according to EN 50274 |
Yes |
1) Depending on the cable infeed, only small cross-sections are possible with devices in molded-plastic enclosures.
Auxiliary switches
Standards |
DIN VDE 0660, IEC 60947 |
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---|---|---|---|---|---|---|---|---|---|---|
Circuit breaker |
Type |
3LD20 |
3LD21 |
3LD22 |
3LD25 |
3LD27 |
3LD28 |
3LD23 |
3LD24 |
|
Rated insulation voltage Ui |
V |
500 |
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Rated operational voltage Ue |
V AC |
500 |
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Rated uninterrupted current Iu |
A |
10 |
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Rated operational current Ie, AC-15 |
At 120 V |
A |
6 |
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At 220 ... 240 V |
A |
3 |
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At 380 ... 415 V |
A |
1.8 |
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At 500 V |
A |
1.4 |
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Short-circuit protection, auxiliary switch, max. back-up fuse (gL/gG) |
A |
10 |
Conductor cross-sections for auxiliary conductors
Standards |
DIN VDE 0660, IEC 60947 |
||||||||
---|---|---|---|---|---|---|---|---|---|
Circuit breaker |
Type |
3LD20 |
3LD21 |
3LD22 |
3LD25 |
3LD27 |
3LD28 |
3LD23 |
3LD24 |
Connection type |
Screw terminals |
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Solid or stranded |
mm2 |
2 × (0.75 ... 2.5), 1 × 4 |
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Finely stranded with end sleeve |
mm2 |
2 × (0.75 ... 1.5), 1 x 2.5 |
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Torque for terminal |
Nm |
0.8 |