Lockable Terminal Shield Main Switch for Distribution Board Lockable Terminal Shield Main Switch for Distribution Board
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Lockable Terminal Shield Main Switch for Distribution Board Lockable Terminal Shield Main Switch for Distribution Board
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Lockable Terminal Shield Main Switch for Distribution Board
Lockable Terminal Shield Main Switch for Distribution Board
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Lockable Terminal Shield Main Switch for Distribution Board
Lockable Terminal Shield Main Switch for Distribution Board
Home Circuit Breaker & Fuses Switch Disconnector Lockable Terminal Shield Main Switch for Distribution Board
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XD2PA 22mm 4 Direction Joystick Controller Switch
XD2PA 22mm 4 Direction Joystick Controller Switch

Lockable Terminal Shield Main Switch for Distribution Board

Whether the smart:NO
Brand Name:Newtrend
Application:Industrial
Material:Plastic,metal
Place of Origin:China
Max. Current:250A
Model Number:SNT2-250
Max. Voltage:690V
IP level:other
Pole:2-pole,4-pole,3-pole
Certification:CCC, CE
SKU: 1770412499049390080 Category: Switch Disconnector
  • Description
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description

Switch Disconnector terminal shield 1P 2P 3P 4P Lockable Din Rail 125A 160A 250A Isolator Main Switch for Distribution Board

   

Construction and Feature
– Capable of switch electric circuit with load
– Provide function of isolation
– Used as main switch for household and similar installation

 

Technical Data:
– Pole No.: 1P, 2P, 3P, 4P
– Rated current(A): 125A, 160A, 250A
– Rated voltage: AC 230/400V
– Rated frequency: 50/60Hz
– Rated short-circuit making capacity: 3kA
– Rated withstand current: 3kA within 1sec
– Electro-mechanical endurance: 10000 cycles
– Connection capacity: Rigid conductor 50mm2 and up
– Connection terminal: Extensional busbar

 

Installation:
– On symmetrical din rail 35.5mm
– Panel mounting
– Terminal Connection Height: H=22mm

 

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Lockable Terminal Shield Main Switch for Distribution Board.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

A

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

A

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

A

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

A

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

A

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.

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