Applicable place:(Suitable forplaces with high voltage level)
1.Overhead lines.
2.Industrial.
3.Mining enterprises.
4.Power stations.
5.Substations.
This is a new type of on poleswitchgearin vacuum circuit breaker series products in China.
PRODUCT FEATURES:
1.Unilateral voltage increase time delay
The delay time is continuously adjustable. The VCBr will not close When the voltage increases at both sides, however it will automatically open when the voltage is loss.
2.Over current protection
Inverse time over current protection, and the over current value can be randomly set through the keyboard.
3.Quick-breaking protection
Inverse time quick-breaking protection, and the quick-breaking value can be randomly set through the keyboard.
4.Small current earthing protection
Time-limited small current earthing protection, and the protective current value can be randomly set through the keyboard.
5.Reclosing function
Multiple-reclosing function, the reclosing time and the reclosing interval can be randomly set through the keyboard.
6.Inverse time function
20 fast & slow inverse time A-T curves will be provided, to realize the automatic cooperation between the higher and the lower.
7.Closing lock
If the VCB closes on the fault point, the controller will automatically open it and realize closing lock.
8.Sequency cooperation
If the fault occurs on its front line, the upstream recloser will prevent the downstream recloser from acting, however, it will automatically isolate the fault zone without breaking if the fault occurs on the line of the downstream recloser.
9.Four remote function
Standard RS-485 communication Interface can work
10.Memory
The data will be automatically stored in the memory (Non volatile memory) for not less than 20 years
11.Three-step protection
Power on password protection, only the authorized person can change the settings. The instal lation position of the meter is preserved in the box of the controller.
12.Local remote control
The remote control distance is 50m.
Main Technical Parameters
Rated voltage |
kV |
12 |
24 |
40.5 |
Rated current |
A |
630/800 |
630/800 |
800 |
Rated frequency |
Hz |
50/60 |
50/60 |
50/60 |
1min power frequency withstand voltage |
kV |
42/48 |
65/79 |
70 |
Lightning impulse withstand voltage |
kV |
75/85 |
125/150 |
170 |
Rated short circuit breaking current |
kA |
16 |
20 |
20 |
Rated short circuit making current |
kA |
31.5 |
40 |
40 |
Rated peak withstand current |
kA |
31.5 |
40 |
40 |
Rated short time withstand current, 3s |
kA |
16 |
20 |
20 |
Operations of short-circuit breaking current interruption |
times |
30 |
30 |
30 |
Mechanical life |
times |
30000 |
30000 |
30000 |
Operation sequence |
|
O-0.3s-CO-3s-CO-3s-CO |
Lawrence Electric Co., Ltd. is a high-tech enterprise focusing on power transmission and distribution products, providing customers with one-stop service of power transmission and distribution products.
It mainly produces and sells lightning arrester, insulator, fuse, isolation / load switch, SF6 / vacuum circuit breaker, power supply fittings, optical cable fittings, switch cabinet and other transmission and distribution products. The company has production bases and sales centers in Jiangxi, Zhejiang, Uganda, Tanzania and other places.
Our products have operated safely in the power supply systems of more than 20 countries and regions around the world for more than 10 years. They are also qualified suppliers of China State Grid and China Southern Power Grid. At present, they have gained a good reputation in the field of power system in the world.
We have received high-quality product recommendation letters from power supply companies in Kenya, Uganda, Tanzania, Zambia, Guinea, Ghana, Togo, Mozambique, Nepal, Guyana, Myanmar and other countries and regions.
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OUR VISION: ONE STOP SERVICE FOR THE GLOBAL DISTRIBUTION AND SUBSTATION ELECTRICAL MATERIALS.
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