China ZN28-12 11kV 630A 3Phase High voltage electric vacuum circuit breaker

Product Description

ZN28-12 model indoor AC HV vacuum circuit breaker can be used in indoor with three phases, 50Hz, rated voltage 12/24KV system. It mainly serves in mineral enterprise, power plant and substation for control and protection of electric equipment. It can be installed both in trolley type switchgear and fixed type switchgear.

Table 1Basic parameter

Name

Unit

Value

Rated voltage

kV

12/24

Rated current

A

630/1250

Rated frequency

Hz

50/60

Rated insulation level

Lightning impulse withstand voltage

Phase to phase, phase to earth

kV

75

Insulating distance of contact

85

1min power frequency withstand voltage

Phase to phase, phase to earth

42

Insulating distance of contact

49

4s rated short time withstand current

kA

31.5

Rated short circuit break current

31.5

Rated peak value withstand current

80

Rated short circuit making current

80

Rated operation sequence

O-0.3s-CO-180s-CO

Break times of rated short circuit current

Times

50

Mechanical life

20000

Break current of rated different phases earth fault

kA

27.4

Break current of rated single capacitor bank

A

400

Break current of rated back to back capacitor bank

400

Company Information

LINHAI YUFLY COMMERICAL CO., LTD. (YUFLY) is an authorized manufacturer and distributor mainly
producing electrical apparatus in power distribution system and line system, a high and new-technology
enterprise in Zhejiang Province China and AAA-grade Qualified Enterprise of Bank of China.

YUFLY mainly design, manufacture, sale and service of 145kV and below Circuit breaker,Load break
switch, Disconnect switch, Insulator, Surge arrester, Drop-out fuse, etc.

Industry Park (Workshop) covers a floor space of 50 ,000m 2 , equipped with a world–level advanced
processing equipments and machines, advanced design, reasonable structure, reliable performance,
the leading domestic level, high-voltage lines by the National Science and Technology.

YUFLY have an international business teams around 100 staffs who are all from famous university, most
of them have more than 30 years export experience and professional knowledge of electric power
system.

All our purpose is supply our customers complete service, Select all market information share with
clients, Offer quality products with competitive prices, Search and develop new products, Exploring new
markets together with clients, Follow up international freight and storage, Train and supply technical
guide for clients, Settle all after-sale questions.

YUFLY has set up a business network covering more than 50 countries in all over the world and
established agents and sub-company in Iran, Indonesia, Vietnam, Thailand, Myanmar, Syria, Korea,
Canada, Russia, Georgia, Cambodia, Ecuador, Nigeria, Kenya, Ghana.

All requirements are welcome.