Home     ZW32-12 10KV High voltage vacuum circuit breaker on outdoor column

产品名称：ZW32-12 10KV High voltage vacuum circuit breaker on outdoor column

产品应用： I Product overviewZW32 outdoor AC high voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high volt

E-mail：sales@feidadq.com

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产品介绍

I. Product overview

 
ZW32 outdoor AC high voltage vacuum circuit breaker is a three-phase AC 50Hz outdoor high voltage switchgear, which can break and combine the load current, overload current and short circuit current in the power system. The product is suitable for substation, industrial and mining enterprise distribution system, rural power grid frequently operating places and other similar places.

 Application Environmental conditions:
 
L Ambient air temperature: -40℃ ~ +40℃; L Relative humidity: monthly average ≤90%, daily average ≤95%; L Altitude: ≤2000m; L Earthquake intensity: ≤8; L Wind speed: ≤34m/s (equivalent to 700Pa on the surface of the cylinder); L Pollution level: Level IV (the corresponding creepage distance of insulator is 31mm/kV); L Case protection grade: IP44; Thickness of ice cover: ≤10mm; L Installation site: should be free from inflammable, explosive, chemical corrosion and regular violent vibration.
 
performance feature:

l. Integrated pouring of column insulation and vacuum arc extinguishing chamber, oil-free design. Good breaking performance and long service life.
l. Reasonable seal structure, the level Ⅳ pollution level. Suitable for areas with poor external conditions.
l .The switch high voltage part, low voltage loop and operating mechanism are sealed in the box, which can be used for a long time without maintenance.
l. Equipped with advanced spring-operated mechanism, the circuit breaker is small in size, light in weight, low in power consumption and reliable in operation.
l. It can operate in place or reserve remote interface.
l. The switch housing has obvious "split", "close" position and "energy storage" indication, the indication is clear and reliable.
l. The housing has special grounding wire installation position, mounting bolt and grounding mark.
l. The switch has manual "close", "open" and "energy storage" operation handles, which can be used to open, close and store energy manually.
l. The switch is equipped with three phase CT with adjustable CT variable ratio.
l. It has overcurrent trip and anti-inrush device.

technical parameters：

Table 1 Main technical parameters of circuit breaker

Number  name  Unit numerical value
l nominal voltage kV 12
2 rated current A 630
3 rated frequency Hz 50
4
  • Rated peak withstand current
 kA 50
5 Rated short-time withstand current kA 20
6 Rated short circuit switching current kA 20
7 Rated short-circuit closing current (peak) kA 50
8
  • rated duration of short-circuit
 S 4
  rated lmin Power frequency withstand voltage (effective value)(wet) dry phase, ground/fracture kV (34)42／48
9 insulation Rated lightning) medium impact pressure (peak) phase, to the ground/fracture kV 75／85
level Secondary loop LMIN power frequency withstand voltage kV 2
10
  • Rated operating sequence
   O—0．3s—CO—180s—CO
ll Rated short circuit switching current switching times second-rate 30
12 mechanical life second-rate 10000

Table 2 Main mechanical characteristic parameters of circuit breaker

Number Name Unit numerical value
l clearance between open contacts mm 9±l
2
  • over-travel of the contact
 mm 3±l
3 opening time ms 18～45
4 closing time ms 20～60
5
  • Max.bouncing duration
 ms ≤2
6 The switching and closing of the three-phase system is out of synchronization ms ≤2
7 Average breaking speed m／S 1．4±0．2
8 Average closing speed m／S 0．6±0．2
9 Dominant circuit resistance μQ ≤80
    Main circuit resistance μQ ≤120
10 With the isolation Fracture from ms ≥200
The conducting part is earthed ms ≥160

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