Fixed contacts for vacuum circuit breaker usually refers to the circuit in a stationary state, not with the circuit on and off operation and movement of the conductive contact parts, generally used in conjunction with the dynamic contacts, to achieve the connection and disconnection of the circuit. For example, in the high-voltage switchgear, the fixed contact is a fixed part of the installation, when the movable contact and fixed contact, the circuit conductive; movable contact away from the fixed contact, the circuit is disconnected.

No.	Item	Unit	Date
1	Rated Voltage	kV	12/24/40.5
2	Rated Current	A	630/1250/1600/2000/2500/3150/4000
3	Material		Copper T2
4	Surface treatment		Silver-plated

Good electrical conductivity

Able to conduct current stably, avoiding problems such as heat generation and energy loss due to excessive resistance.

High contact reliability

Close and reliable contact with the movable contact, it is not easy to have poor contact, loose and other phenomena in the process of long-term use to ensure the normal operation of the circuit.

Stronger abrasion resistance

As friction occurs with the moving contact during the opening and closing operation, it is necessary to have a certain degree of abrasion resistance to ensure the contact performance and service life after long-term use.

Good insulation properties

In addition to the conductive part, other parts of the static contact should have good insulation properties to prevent current leakage and short-circuit faults.

Adaptability to the environment

able to work normally under different environmental conditions (e.g. temperature, humidity, dust, etc.), with a certain degree of corrosion and oxidation resistance.

Product Applications

High-voltage switchgear: In high-voltage power systems, Fixed contacts for vacuum circuit breaker in high-voltage switchgear are used to connect and disconnect high-voltage circuits. For example, in 10kV, 35kV and other high-voltage switchgear, static contacts are used in conjunction with movable contacts to realize the control and protection of power lines.

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