TZN1C-12 Vacuum Circuit Breaker

By admin • Oct 11th, 2008 • Category: Vacuum Circuit Breakers SF6 Load Break Switches

1. General

TZN1C-12 series of indoor MV vacuum circuit breakers are used in indoor switchgears with rated voltage 12 kV, frequency 50(60)Hz. They are suitable for making different types of loads and frequent operation, to protect and control the electric equipments in industrial & mining enterprises, power plants and substations.TZN1C -12 series laterally-installed vacuum circuit breaker is a new generation product, developed on the basis of various laterally-installed circuit breakers, featuring with small size, high reliability and maintenance free. The vacuum arc extinguish chamber and main electric conduction loop are embedded as an integration into a solid insulation poles by epoxy resin. Therefore, the product performs with reliable insulation and the size is small. The surface of arc extinguish chamber is able to avoid ambient environmental influence and it can realize the maintenance-free purpose. Flexible installation mode makes it easy to integrate it with disconnector and load break switch, and both sides are optional for installation.

2. Normal Service Condition

Ambient temperature: -15 ℃ ～ +40 ℃
Altitude: ≤1000m
Relative humidity: daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 90%
Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.
Earthquake intensity ≤ 8 degree
If the service condition differs from the above , the user should consult it with manufacturer.

3. Technical Parameters

No.	Item	Unit	Parameter
1	Rated voltage	kV	12
2	Rated frequency	Hz	50（60）
3	Rated short-time power frequency withstand voltage(1 min)	kV	42
4	Rated lightning impulse withstand voltage	kV	75
5	Rated current	A	630、1250	630、1250
6	Rated short-time withstand current	kA	25	31.5
7	Rated peak withstand current	kA	63	80
8	Rated short-circuit breaking current	kA	25	31.5
9	Rated short-circuit making current	kA	63	80
10	Rated operating sequence	/	O-0.3s-CO-180s-CO
11	Short-circuit current breaking times	times	274
12	Rated capacitor bank breaking current	A	630/400
13	Mechanical endurance	times	10000

4. Dimensions (withdrawable type)

5. Typical Electric Diagram (withdrawable type)

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