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Yfz (ZN) -24 Safe & Reliable Hv Vacuum Circuit Breaker with High Quality

Basic Info

Model No.:  YFZN(ZN)-24

Product Description

Model NO.: YFZN(ZN)-24 Operation: Electric Type Arc-extinguishing Medium: Vacuum Poles Number: 3 Function: OVP(Overvoltage Protection) Environment: Indoor Trademark: YF Breaking Capacity: High Voltage Circuit Breakers Speed: High-Speed Circuit Breaker Installation: Fixed Type: Circuit breaker Certification: ISO9001-2000, CE Test Equipment: IEC Standard Origin: Jiangyin Yunfeng, China Product Overview
YFZN(ZN)-24/T630-25 indoor AC HV Vacuum circuit breaker with disconnector(disconnector can be also removed and its appearance is similar to the traditional ZN 28 circuit breaker. It is used for the fixed HV cabinet such as KGN and XGN, ect) is applied in the AC 50 Hz network with the rated voltage 24kV. It is a Vacuum Circuit Breaker with obvious isolating fracture in conformity to GB1984-2003. It can be also applied to the power system as an independent electrical unit for breaking load current, overload current and short-circuit current. The obvious isolating fracture can guarantee the safety of construction personnel working on the HV power grid. It is particularly applied at the site without oilation, free of maintenance and required for frequent operation.

Model Specification
Yfz (ZN) -24 Safe & Reliable Hv Vacuum Circuit Breaker with High Quality

Characteristics
         a.small size
         b.simple but reasonable structure
         c.small operation force
         d.reliable performance 
         e.convenient maintenance

Service Conditions
          1.Altitude:2000m;
          2.Ambient temperature-25ºC-+ 40ºC;
          3.The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be               larger than 90%:
          4.The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and                   steam;
          5.The site without fire hazards and explosion hazards;
          6.The site that the seismic intensity does not exceed degree 8; the gradient shall not exceed 5°

Main Technical Parameters
Serial No. Item Unit Vacuum Circuit Breaker with Disconnector
1 Rated voltage kV 24
2 Rated frequency Hz 50
3 Rated current A 630
4 Rated short-circuit breaking current kA 25
5 Rated short-circuit making current kA 63
6 Rated peak withstand current(dynamic stability current) kA 63
7 Rated short-time withstand current(dynamic stability current)/duration kA/s 25/4
8 1min power-frequency withstand voltage(effective value) to earth, phase-to-phase,vacuum fracture/isloating fracture kV/kV 65/79
9 Full-wave lightning impulse withstand voltage(peak)to earth,phase-to-phase,vacuum fracture/isolating fracture kV/kV 125/145 
10 Main loop resistance μΩ ≤80
11 Rated breaking current of single capacitor bank  A 630
12 Rated back-to-back breaking current of capacitor bank A 400
13 Mechanical life Time 10000
14 Clearance between open contacts mm 12±1
15 Overtravel of contact mm 4±1
16 Average opening speed m/s 1.1-1.7
17 Average closing speed m/s 0.8-1.2
18 Rated contact pressure N 2500±200
19 Contact closing bounce time ms ≤2
20 Three-phase opening and closing asynchronization ms ≤1
21 Inter-pole center distance mm 275±2
22 Gross thickness of contact wear mm 3
23 Distance between live parts and of phase to earth mm ≥180
24 Closing operation torque of vacuum arc-extinguishing chamber  N.M ≤90
25 Opening operation force of  vacuum arc-extinguishing chamber  N ≤10
26 Rated closing operation voltage  V ≌220/-110/~100
27 Rated opening operation voltage  V ≌220/-110/~100


Electrical Parameters of Spring Operation Mechanism Equipped with YFZN(ZN)-24D/T630-25-G Vacuum Circuit Breaker
   Permant-magnet Single-phase DC Energy Closing Motor  
Rated Voltage Rated Output Power Normal Operating Voltage Range
AC/DC 220V ≤70W 85%-110% of rated voltage





 

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Product Categories : Indoor HV Vacuum Circuit Breaker

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