VB5(ZN21B) vacuum circuit breaker is based on the introduction of Belgium EIB vacuum circuit breaker technology products, after several years of technical research and process exploration, put into mass production in 1993. VB5(ZN21B) and its series products have excellent advancement and reliability.
Rated frequency50/60 Hz,Rated voltage 12kV.
VB5(ZN21B) vacuum circuit breaker is based on the introduction of Belgium EIB vacuum circuit breaker technology products, after several years of technical research and process exploration, put into mass production in 1993. VB5(ZN21B) and its series products have excellent advancement and reliability.
VB5(ZN21B) type vacuum circuit breaker can satisfy all kinds of operation of power grid in normal or accident state, including closing and opening short circuit current, as long as it is within the normal service conditions and the technical parameters of the circuit breaker.
VB5(ZN21B) vacuum circuit breaker has excellent performance in the case of frequent operation and short circuit current.Fully meet the requirements of automatic reclosing and has high operational reliability and service life.
VB5(ZN21B) vacuum circuit breaker can be installed in the switchgear in the form of fixed, or installed on the handcar chassis can be withdrawable.
| NO. | Item | Unit | Data | |||
| 1 | Rated voltage | kV | 12 | |||
| 2 | Rated short-time power frequency withstand voltage ( 1 min) | kV | 42( phase to phase,to earth) / 48( isolating distance) | |||
| 3 | Rated lightning(1 min) impulse withstand voltage(peak) | kV | 75( phase to phase,to earth) / 85( isolating distance) | |||
| 4 | Rated frequency | Hz | 1 | |||
| 5 | Rated current | A | 630,1250 | 630, 1250, 1600, 2000, 2500, 3150 | 1250, 1600, 2000, 2500, 3150, 4000 | |
| 6 | Rated short-circuit breaking current | kA | 20 | 25 | 31. 5 | 40 |
| 7 | Rated short-time withstand current( 4s) | kA | 20 | 25 | 31. 5 | 40 |
| 8 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
| 9 | Rated short-circuit making current | kA | 50 | 63 | 80 | 100 |
| 10 | Rated short-circuit breaking current(different directions) | kA | 17. 3 | 21. 7 | 27. 3 | 34. 6 |
| 11 | Rated operation order | open - 0.3S - close open- 180S - close open | open - 180S - close open - 180S - close open | |||
| 12 | Opening time(rated voltage) | ms | 30-60 | |||
| 13 | Closing time(rated voltage) | ms | 25-55 | |||
| 14 | Rated output power of the energy storage motor | W | 100 | |||
| 15 | Breaking times under rated short-circuit current ( E2 grade) | times | 30 | |||
| 16 | Rated voltage of energy storage motor | V | AC/ DC220 ,AC/ DC110 | |||
| 17 | Rated close operating voltage/current | V/A | AC/ DC220/ 1 ,110/ 2 | |||
| 18 | Rated open operating voltage/current | V/A | AC/ DC220/ 1 ,110/ 2 | |||
| 19 | Rated instantaneous overcurrent tripping action current | A | 5 | |||
| 20 | Rated voltage of the voltage loss trip | V | AC220,AC110 | |||
| 21 | Rated on-off current of auxiliary switch | A | 16 | |||
| 22 | Energy storage time (in rated voltage) | s | <7 | |||
| 23 | Secondary circuit (1 min) power frequency withstand voltage | V | 2000 | |||
| 24 | Main circuit resistance(without plum blossom contact) | μΩ | ≤ 45(630 ~800A) ,≤ 35(1250A) ,≤30(1600-2000A) , ≤25(2500A) ≤ 20(3150A and above) | |||
| 25 | Rated breaking current of capacitor bank ( C2 grade) | A | single fuse 800,back to back fuse 400 | |||
| 26 | Distance between contacts | mm | 9±1 | |||
| 27 | Contact stroke | mm | 3±1 | |||
| 28 | Average closing speed | m/ s | 0. 5~0. 9 | |||
| 29 | Average opening speed | m/ s | 1- 1. 7 | |||
| 30 | Three - phase contactor opening and closing simultaneity | ms | ≤1 | |||
| 31 | Contactor closing bounce time | ms | <2 | |||
| 32 | Mechanical life(M2 grade) | times | 20000 | |||
| 33 | Moving and static contactor allows accumulated wear thickness | mm | 3 | |||
Our VB5 series spring operating mechanism circuit breakers introduce the vacuum circuit breaker technology of Belgium EIB Company, which is suitable for 12~40.5kV high voltage switchgear. It has excellent mechanical and breaking performance and is mainly used in National Grid substations. We has independent research and development production lines, combined with independent research and development tooling, mechanical characteristic curve testing, loop resistance testing, and mechanical running-in before leaving the factory to ensure the parameter performance of each product. We also has the production capacity of permanent magnet operating mechanism circuit breakers.
Q: Are you the manufacturer or trader?
A: We are both manufacturer & trader. We have our own manufacturer named TIANYI TONGYI ELECTRIC CO.,LTD, who have 27 years experience in electric industry. It covers an totally area of 117,000 m2 with 300 employees, also is a qualified supplier of China National Nuclear Corporation(CNNC) and main supplier for State Grid & China Southern Power Grid.
Q: What is your after-sales service?
A: We always provide free online service and technical support within 24 hours. 18 months warranty for customers.
Q: What is your delivery time?
A: Normally 25~35days. It depends on the order quantity and season. We have very strong capacity to produce top quality products, please inquiry us if you have any questions.
Q: What is the quality warranty time?
A: We have quality certificate CCC, CQC, ISO9001, CE ... Meanwhile, we can provide 18 months warranty for our products. Free online service and technical support within 24 hours is always provided to our customers.
Q: Do you accept ODM and OEM?
A: Yes. We have professional R & D teams to update and develop the latest technology. We also can support ODM or OEM, please send us details drawing to discuss.
Q: What is your payment terms?
A: Generally there are two payment terms:
- 30% advance payment via T/T as a deposit, balance 70% against the shipping documents
- Irrevocable L/C at sight
Q: If I want to visit you, how to go?
A: Our factory is located in Luoyuan County, Fuzhou City. Details address is Songshan Area, Taiwan Investment Zone, Luoyuan County, Fuzhou City, Fujian Province,China.
- The nearest airport is Fuzhou Airport, if you come by air, please arrive in Fuzhou Airport, it takes 1 hour from the airport to our factory
- The nearest train station is Luoyuan Station, if you come by train, please arrive in Luoyuan Station, it takes only 5 minutes to our factory.
Q: Do you need agents?
A: Yes, we welcome you to be a partner. Welcome to contact us for more information.
