How does high voltage direct current contactor work

A high voltage direct current contactor is an electrical switch used in HVDC power transmission systems to control the flow of direct current (DC) electrical power. HVDC contactors are designed to handle high voltage and high current levels and are used to disconnect or switch the DC power in the event of a fault, to protect equipment, or to perform maintenance.
HVDC contactors typically consist of a set of stationary contacts and a set of movable contacts, which are connected by a mechanical actuator. When the contactor is energized, the actuator moves the movable contacts into contact with the stationary contacts, allowing electrical power to flow. When the contactor is de-energized, the actuator moves the movable contacts away from the stationary contacts, interrupting the flow of electrical power.
HVDC contractors must be designed to withstand high voltage and high current levels and must be capable of providing a reliable and high-speed interruption of the current flow. They must also be designed to minimize arcing and ensure that the electrical power can be safely and quickly interrupted in the event of a fault.
When choosing an HVDC contactor, it is important to consider factors such as the voltage and current rating of the contactor, the type of contacts used, the response time of the contactor, and the operating temperature range. 

ZXEV071-150A Non-polar epoxy package High Voltage DC Contactor Relay

1. Small and lightweight:Internally adopt reliable sealing technology and filled with nitrogen which arc colling ability is high. It can cut off high voltage DC in a short time.
2. High contact reliability:Due to the contact sealed in the nitrogen, therefore it will be not oxidized, also achieving the contact of the dustproof and waterproof.
3. Safety and reliable:Use the professional explosion-proof structure design,to achieve a high degree of security,adopt magnetic quenching helps to cut-off the DC load quickly.
4. Application:DC charging pile, electric vehicles, hybrid vehicles, battery charging and discharging system,Photovoltaic power generation system such as dc high voltage application.