| SENTRON, Switch disconnector 3LD, emergency switching-off switch, 3- pole, Iu: 100 A, operating power / at AC-23 A 400 V: 37 kW, Molded plastic encapsulation for metric cable gland, 1 NC, 1 NO, rotary operating mechanism, red/yellow |
Model |
Product brand name | SENTRON |
Product designation | 3LD Switch disconnector |
Design of the product | EMERGENCY-STOP switch |
Display version / for switch position indicator manual operation | 1 ON - 0 OFF |
Design of the operating mechanism | Short rotary knob |
Design of handle | rotary operating mechanism, red/yellow |
Type of the driving mechanism / motor drive | No |
General technical data |
Number of poles | 3 |
Number of poles / Note | N |
Type of device | fixed mounting |
Type of switch | Molded-plastic enclosure for metric threaded joint |
Size of switch disconnector | 4 |
Operating frequency / maximum | 50 1/h |
Voltage |
Insulation voltage / rated value | 690 V |
Surge voltage resistance / rated value | 6 kV |
Protection class |
Protection class IP | IP65 |
Protection class IP / on the front | IP65 |
Dissipation |
Power loss [W] / for rated value of the current / at AC / in hot operating state / per pole | 7.5 W |
Electricity |
Current / at AC / rated value | 100 A |
Continuous current / rated value | 100 A |
Continuous current / of upstream fuse / rated value | 100 A |
Main circuit |
Operating frequency | |
initial value | 50 Hz |
Full-scale value | 60 Hz |
Operating power | |
at AC-23 A / at 400 V / rated value | 37 kW |
at AC-23 A / at 690 V / rated value | 30 kW |
at AC-3 / at 400 V / rated value | 30 kW |
at AC-3 / at 690 V / rated value | 22 kW |
Operating voltage | |
at AC / at 50/60 Hz / rated value | 690 V |
Auxiliary circuit |
Number of CO contacts / for auxiliary contacts | 0 |
Number of NC contacts / for auxiliary contacts | 1 |
Number of NO contacts / for auxiliary contacts | 1 |
Operating voltage / of auxiliary contacts / at AC / maximum | 500 V |
Continuous current / of the auxiliary contact / rated value | 10 A |
Insulation voltage / of the auxiliary switch / rated value | 500 V |
Suitability |
Suitability for use | |
Main switch | Yes |
switch disconnector | Yes |
EMERGENCY OFF switch | Yes |
safety switch | Yes |
maintenance/repair switch | Yes |
Product details |
Product feature / interlock | Yes |
Number of bracket locks / maximum | 3 |
Hasp thickness / of bracket locks / minimum | 4 mm |
Hasp thickness / of bracket locks / maximum | 8 mm |
Product extension / optional | |
motor drive | No |
Voltage trigger | No |
Short circuit |
Conditional short-circuit current / with line-side fuse protection | |
at 690 V / by gG fuse / rated value | 50 kA |
Connections |
Type of connectable conductor cross-sections | |
for copper conductor / solid | 1x (4
50mm²) |
for copper conductor / finely stranded / with core end processing | 1x (4
35mm²) |
for copper conductor / stranded | 1x (4
50mm²) |
for auxiliary contacts / solid | 2x (0.75 ... 2.5 mm²), 1x 4 mm² |
for auxiliary contacts / finely stranded / with core end processing | 2x (0.75 ... 1.5 mm²), 1x 2.5 mm² |
for auxiliary contacts / stranded | 2x (0.75 ... 2.5 mm2), 1x 4 mm2 |
Type of electrical connection | |
for main current circuit | box terminal |
for auxiliary contacts | connection terminals |
Requirements |
Design of the fuse link | |
for short-circuit protection of the auxiliary switch / required | fuse gL/gG: 10 A |
Mechanical Design |
Height | 302 mm |
Width | 212 mm |
Depth | 181 mm |
Mounting type | Complete unit in enclosure |
Mounting type | |
front mounting with 4-hole attachment | No |
front mounting with central attachment | Yes |
rail mounting | No |
Net weight | 1 810 g |
Environmental conditions |
Ambient temperature | |
during operation / minimum | -25 °C |
during operation / maximum | 55 °C |