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ZN85B-40.5/T1600/2000/31.5 Indoor Vacuum Circuit Breaker

With the rated voltage of 40.5KV and the rated frequency of 50Hz, the ZN85B-40.5/T1600/2000/31.5 indoor vacuum circuit breaker serves as control and protection equipment in the substations, power plants, as well as industrial and mining enterprises.

With superior performance, this high-voltage switching device can be used for breaking short-circuit current repeatedly and it can be frequently operated within the rated current range. Hence, this indoor vacuum circuit breaker is particularly suitable to break important loads and for occasions requiring frequent operations.

1. Our indoor vacuum circuit breaker adopts the composite insulation of air and organic materials.

2. Installed inside an insulation cylinder, the vacuum interrupter is free from the external influence and mechanical damage.

3. The indoor vacuum circuit breaker adopts overall layout and modular design, which is simple and compact in structure. The operating mechanism is designed into 4 independently arranged functional units, i.e., closing functional unit, opening functional unit, transmission functional unit, and auxiliary functional unit.

4. A special transmission mechanism is used to drive the vacuum interrupter, making the dynamic response characteristic of the operating mechanism more matching with that of the interrupter breaking. This can reduce the closing power, increase closing speed, reduce contact burning, and improve breaking performance.

5. Our indoor vacuum circuit breaker boasts smooth operation, high reliability, as well as small vibration and noise.

Use Environment
1. Altitude: ≤ 1,000m
2. Ambient Temperature: -15℃~+40℃
3. Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90%
4. Water Vapor Pressure: Daily average ≤ 2.2kPa, monthly average ≤ 1.8kPa
5. Earthquake Intensity: < 8 degree
6. The ambient air should not be seriously polluted by dust, smoke, corrosive or flammable gas, vapor, or salt spray.

Technical Parameters
Item Unit Value
Rated Voltage KV 40.5
Rated Current A 1600 2000
Rated Insulation Level

Power Frequency Impulse
Break KV 95 185
Phase to phase KV 95 185
Phase to ground KV 95 185
Auxiliary loop KV 2
Rated Frequency Hz 50
Rated Short-circuit Breaking Current KA 31.5
Rated Peak Withstand Current KA 80
Rated Short-time Withstand Current KA 31.5
Rated Short-circuit Closing Current KA 80
Rated Short Circuit Duration s 4
Rated Short-circuit Current Breaking Times times 20
Rated Cable Charging Breaking Times A 50
Rated Operating Sequence O-0.3s-CO-180s-CO
Mechanical Life times 10,000
Closing Time ms 45-75 (58±8)
Opening Time ms 35-75 (43±5)
Rated Power of the Energy Storage Motor W 200
Energy Storage Time s ≤10
Rated Operating Voltage Closing loop V DC 220/110
Opening loop V DC 220/110
energy storage motor V DC/AC 220
Secondary Loop Current Closing loop A 0.89/1.91
Opening loop A 0.89/1.91
Auxiliary switch A AC 10
DC 5

Note: 1. The closing time and opening time are calculated at the highest and lowest voltages respectively. The value inside the bracket is the one under the rated voltage.
2. Please refer to the qualified certificate for the actual technical parameters.

As an experienced vacuum circuit breaker manufacturer and supplier in China, BBE also offers low voltage distribution switchgear, high voltage vacuum contactor, vacuum circuit breaker for generator, withdrawable switchgear, and much more.

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