Main Product > > Siemens Industrial Control
SENTRON, Switch disconnector 3LD – 3LD2804-0TK53
emergency switching-off switch, 3- pole, Iu: 125 A, operating power / at AC-23 A 400 V: 45 kW, front-mounted, rotary operating mechanism, Red / yellow, 4-hole mounting of the handle
Technical Specification
| Model | |
| product brand name | SENTRON |
| product designation | Switch disconnector |
| design of the product | EMERGENCY-STOP switch |
| display version for switch position indicator manual operation | 1 ON – 0 OFF |
| type of switch | front mounted |
| design of the actuating element | Short rotary knob |
| color of the actuating element | red |
| design of handle | rotary operating mechanism, red/yellow |
| type of the driving mechanism motor drive | No |
| General technical data | |
| number of poles | 3 |
| size of switch disconnector | 4 |
| mechanical service life (operating cycles) typical | 100.000 |
| electrical endurance (operating cycles) | |
| ● at AC-23 A at 690 V | 6.000 |
| operating frequency maximum | 50 1/h |
| degree of pollution | 3 |
| Voltage | |
| insulation voltage rated value | 690 V 6 kV |
| surge voltage resistance rated value | 6 kV |
| operating voltage | |
| ● at AC rated value | 690 V |
| operating frequency rated value | |
| ● minimum | 50 Hz |
| ● maximum | 60 Hz |
| Protection class | |
| protection class IP | IP65 |
| degree of protection NEMA rating | 1, 3R, 4X, 12 |
| 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 | 12 W |
| Main circuit | |
| operational current | |
| ● at AC-21 at 690 V rated value | 125 A |
| ● at AC-21 A at 240 V rated value | 125 A |
| ● at AC-21 A at 400 V rated value | 125 A |
| ● at AC-21 A at 440 V rated value | 125 A |
| ● at AC-23 A at 400 V rated value | 80 A |
| operating power | |
| ● at AC-23 A at 240 V rated value | 22 kW |
| ● at AC-23 A at 400 V rated value | 45 kW |
| ● at AC-23 A at 440 V rated value | 45 kW |
| ● at AC-23 A at 690 V rated value | 37 kW |
| ● at AC-3 at 240 V rated value | 22 kW |
| ● at AC-3 at 400 V rated value | 37 kW |
| ● at AC-3 A at 690 V rated value | 30 kW |
| Auxiliary circuit | |
| number of CO contacts for auxiliary contacts | 0 |
| number of NC contacts for auxiliary contacts | 0 |
| number of NO contacts for auxiliary contacts | 0 |
| 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 |
| suitability for use switch disconnector | Yes |
| suitability for use EMERGENCY OFF switch | Yes |
| suitability for use safety switch | Yes |
| suitability for use maintenance/repair switch | Yes |
| Product details | |
| product feature can be locked into OFF position | Yes |
| accessories | |
| product extension optional | |
| ● motor drive | No |
| ● voltage trigger | No |
| number of connectable NC contacts for auxiliary contacts attachable maximum | 3 |
| number of connectable NO contacts for auxiliary contacts attachable maximum | 3 |
| number of connectable CO contacts for auxiliary contacts attachable maximum | 0 |
| number of bracket locks maximum | 3 |
| hasp thickness of the bracket locks | 4 … 8 mm |
| Short circuit | |
| conditional short-circuit current with line-side fuse protection | |
| ● at 690 V by gG fuse rated value | 20 kA |
| let-through current with closed switch | |
| ● at 240 V for combination switch + gG fuse maximum | 10 kA |
| ● at 440 V for combination switch + gG fuse maximum | 10 kA |
| ● at 690 V for combination switch + gG fuse maximum permissible | 10 kA |
| I2t value with closed switch | |
| ● at 240 V for combination switch + gG fuse maximum | 104 kA2.s |
| ● at 440 V for combination switch + gG fuse maximum | 104 kA2.s |
| ● at 690 V for combination switch + gG fuse maximum | 104 kA2.s |
| design of the fuse link | |
| ● for short-circuit protection of the main circuit required | fuse gL/gG: 125 A |
| ● for short-circuit protection of the auxiliary switch required | fuse gL/gG: 10 A |
| operational current of upstream fuse rated value | 125 A |
| according UL | |
| operational current at AC according to UL 508/UL 60947-4-1 rated value | 125 A |
| operating voltage at AC at 50/60 Hz according to UL 508/UL 60947-4-1 rated value | 600 V |
| active power [hp] at AC at 480 V according to UL 508/UL 60947-4-1 rated value | 75 |
| active power [hp] at AC at 600 V according to UL 508/UL 60947-4-1 rated value | 100 |
| short-time withstand current (SCCR) at 600 V according to UL 508/UL 60947-4-1 | 10 kA |
| continuous current of upstream fuse according to UL rated value | 200 A |
| type of fuse according to UL | RK5 |
| Connections | |
| AWG number as coded connectable conductor cross section solid maximum | |
| ● | 1 |
| ● | 12 |
| type of connectable conductor cross-sections for copper conductor | |
| ● solid | 1x (4…50mm²) |
| ● finely stranded with core end processing | 1x (4…35mm²) |
| ● stranded | 1x (4…50mm²) |
| type of connectable conductor cross-sections for auxiliary contacts | |
| ● solid | lateral auxiliary switch 2x (0,75 … 2,5mm²), 1x 4mm²; front auxiliary switch 1x (0,75 … 2,5mm²) |
| ● finely stranded with core end processing | lateral auxiliary switch 2x (0,75 … 1,5mm²), 1x 2,5mm²; front auxiliary switch 1x 2,5mm² |
| ● stranded | lateral auxiliary switch 2x (0,75 … 2,5mm²), 1x 4mm²; front auxiliary switch 1x (0,75 … 2,5mm²) |
| type of electrical connection | |
| ● for main current circuit | box terminal |
| ● for auxiliary contacts | connection terminals |
| Mechanical Design | |
| height | 106 mm |
| width | 90 mm |
| depth | 112.5 mm |
| type of device | fixed mounting |
| fastening method | Built-in unit fixed-mounted version |
| fastening method | |
| ● 4-hole front mounting | Yes |
| ● front mounting with central attachment | No |
| ● rail mounting | No |
| net weight | 480 g |
| Environmental conditions | |
| ambient temperature during operation | |
| ● minimum | -25 °C |
| ● maximum | 55 °C |
| ambient temperature during storage | |
| ● minimum | -25 °C |
| ● maximum | 55 °C |
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