Chint SHT-X3 Shunt Release Chint SHT-X3 Shunt Release
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Chint SHT-X3 Shunt Release
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Chint SHT-X3 Shunt Release
Chint SHT-X3 Shunt Release
Chint SHT-X3 Shunt Release
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Chint SHT-X3 Shunt Release

Brand Name:Chint
Place of Origin:China
Model Number:SHT-X3
rated voltage:AC 230V 400V AC DC 24V 48V
Power:3A, 6A
SKU: 1770403297245536256 Category: Chint MCB

What is SHT-X3 Shunt Release?

The Chint SHT-X3 Shunt Release is a shunt trip release - an electrical accessory that mounts on MCBs (Miniature Circuit Breakers) to enable remote tripping. When control voltage (230V / 400V) is applied, the shunt release instantly trips the MCB, disconnecting the circuit.

Common Applications

  • Emergency Stop - Central emergency shutdown of multiple circuits
  • Fire Safety Systems - Interface with fire alarm to cut non-essential power
  • Remote Control - Switch off circuits from control room
  • Automation Integration - Controlled by BMS or PLC systems
  • Alarm Integration - Trip on security/intrusion alarms

How It Works

The shunt release contains an electromagnet coil. When energized with control voltage, the coil creates a magnetic field that mechanically trips the MCB's operating mechanism. The MCB latches in the OFF position until manually reset.

Technical Specifications

ModelSHT-X3
Control Voltage230V / 400V
CompatibilityChint NXB, NB1, NBH8 series MCBs
MountingLeft side mounting on MCB
OperationInstant trip on voltage application

Installation Note

The SHT-X3 mounts on the left side of compatible MCBs. It requires a control voltage source (separate from the protected circuit). For emergency stop applications, use normally-open push buttons in series with the control voltage supply.

  • Description
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description

Chint original brand SHT-X3 AC 230V 400V AC DC 24V 48V CHNT Shunt Release

   

1. Major function

To be assembled with the circuit breaker to achieve remote shunt trip
 

2. Parameters and performance

Rated insulation voltage (Ui): 500V; Rated operation current under different rated operation voltage (see Table 1): Utilization category: AC-12, DC-12.

Action characteristics: within the range of 70% ~ 110% of the rated control supply voltage, the release should operate reliably to open the circuit breaker. Figure 1 shows the wiring diagram for the release. When the release is open, terminal C2 and 12 shall be connected, and the external security indicator shall light up; when the release is closed, terminal C2 and 14 shall be connected, and the external warning indicator shall light up; when the release is closed, and the external button is connected, the release shall trip and drive the circuit breaker to trip and be opened. Meanwhile, the release indicator shall display trip mark.Mechanical life: operating life of the release is ≥ 4000 cycles.

 

6. Product catalog

SHT-X3 catalog page 1

SHT-X3 catalog page 2

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint SHT-X3 Shunt Release.

📥
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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