ZW32・12〜24KV Overview
ZW32-12 outdoor high voltage vacuum circuit breaker(hereinafer referred to as circuit breaker) is rated voltage of 12kv,
50hz three-phase AC outdoor power distribution equipment.Mainly used for breaking, closing load current,
overload current and mining enterprise in the distribution system to do protection and control,
especially for rural power grids and the place for frequent operations.
ZW32-12-24KV outline and mounting dimensions:
Reference standards:
GB/T 1984 "High voltage AC circuit breaker"
GB/T11022 "High voltage switchgear and control equipment standard common technical requirements"
GB/T311.1 "Insulation coordination of high voltage power transmission equipment: high pressure test technology"
DL/T 403" 12-40.5kV high voltage vacuum circuit breaker ordering technical conditions"
Environmetal conditions for usage:
Altitude does not exceed 1000m
Ambient air temperature:-40℃~+40℃
Wind speed is not greater than 35m/s.
Pollution level:Class IV
Installation site:no flammable, no explosive hazard,no chemical corrosion.
Earthquake intensity does not exceed 8 degrees.
Main features:
Vacuum Circuit breaker adopts three-phase pillar structure, it has reliable breaking performance,
no combustion and explosion hazard, maintenance-free,small size, light weight and long service life etc.
Vacuum circuit breaker with a fully enclosed structure, good sealing performance,
help to improve the moisture,anti-condensation performance,especially adapted to the use of cold or wet areas.
Three-phase pillars and current transformer using imported outdoor epoxy resin solid insulation,
which has high and low temperature resistance,resistance to ultraviolet light, andti-aging characteristics.
Operatiing mechanism using small spring operating mechanism, low energy consumption for breaking-closing;
use of direct transmission mode, sub-closing parts less,high reliablility.The operating mechanism and
the arc extinguishing system are placed in a sealed mechanism box to solve the problem of corrosion of components
such as parts and improve the reliablility of the circuit breaker.
Vacuum circuit breaker sub-closing operation can be used manual or electric operation and remote operation.
It can be equipped with the controller to achieve power distribution automation,it can also be combined with
the control of the recloser automatic recloser.
The vacuum circuit breaker can be equipped with two-phase or three-phase CT for over-current automatic trip protection
and intelligent controller for information analysis.
The total mass of the circuit breaker (without isolation switch) 105KG,(with disconnector) 125KG.
The main technical parameters:
| No. | Item | Unit | Value |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630,1250, |
| 4 | Rated short-circui t breaking current | kA | 16,20,25 |
| 5 | Rated peak withstand current | 40,50,63 | |
| 6 | Rated short-tim e withstand current | 16,20,25 | |
| 7 | Rated short-duration current | S | 4 |
| 8 | Rated short circui t closing current(peak) | 40,50,63 | |
| 9 | Rated operation sequence | time | O_0.3S_180S_CO |
| 10 | mechanical life | 1000/isolating switch 2000 | |
| 11 | Rated curren t breaking times | 10000 | |
| 12 | Rated short circuit breaking current breaking times | 50 | |
| 13 | Power frequency withstand voltage (1min (wet)alternate to the ground (dry) interphase, ground/fracture | KV | 34 42/48 |
| 14 | Lightning impulse withstand voltage(peak) interphase,ground/fracture | 75/85 | |
| 15 | Secondary circuit 1min power frequency withstand voltage (expect electronics) | V | 2000 |
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