DC lsolator Switch TDDH4

Technical Data 

Product Introduction

1、 Equipment positioning and core application scenarios

Positioning: Talemod DC Isolator Switch is the core electrical equipment that ensures safe and stable operation in DC distribution systems, and can be regarded as the "safety guard" of the system. ​
Key background: Compared to AC systems, DC systems have the characteristics of difficult natural extinguishing of current and longer arc duration, which require more stringent performance requirements for safety isolation devices. This isolation switch is designed specifically for this pain point. ​
Typical scenarios: Widely used in DC distribution scenarios such as photovoltaic power stations, energy storage systems, electric vehicle charging stations, industrial DC power supply, etc., and playing an indispensable key role in all scenarios. ​

2、 Core design purpose and working principle of "air breakpoint"

Core objective: After the current is cut off by pre protection devices such as fuses and circuit breakers, a reliable "air break point" is further provided to achieve thorough and safe isolation of electrical circuits. ​
The essence of "air breakpoint" is not a simple physical gap, but a precisely calculated safe isolation space - when the front-end equipment interrupts the current, the circuit may have residual capacitive charges or induced voltage, and the isolation switch is driven by a mechanical structure to separate the dynamic and static contacts, forming an air insulation gap that meets safety standards. ​
Core function: Effectively block the flow of residual current and prevent the risk of electric shock caused by residual voltage; At the same time, avoid equipment damage and personnel injury caused by accidental closing or circuit misconnection during subsequent maintenance. ​

3、 Performance advantages of products adapted to DC systems

Excellent arc resistance: The contact is made of a special alloy material with high conductivity and wear resistance, which can suppress the generation and spread of arc at the moment of disconnection, avoid excessive erosion of the contact, and extend the service life of the equipment. ​
Reliable insulation strength: The insulation structure has undergone strict withstand voltage testing, ensuring the insulation strength of the "air break point" even in high-voltage DC environments, and eliminating leakage phenomena. ​
Anti misoperation design: equipped with mechanical and electrical interlocking devices (such as confirming that the front equipment disconnects the current before operating the isolation switch to open and close), further improving the safety of system operation.