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

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


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

 

Contact us if you need more details on Vacuum Circuit Breaker. We are ready to answer your questions on packaging, logistics, certification or any Other aspects about with Disconnector、Switchgear. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Indoor HV Vacuum Circuit Breaker