Breaking Capacity:High Voltage Circuit Breakers
Speed:High-Speed Circuit Breaker
Function:Circuit-Breaker Failure Protection
Certification:VDE, ISO9001-2000, CE, CCC
Insulated Cylinder:Embedded Poles
ERFA-24 Series of Indoor High Voltage Vacuum Circuit BreakerGeneral Description
with Common Insulated Cylinder
ERFA-24 series of Indoor High Voltage Vacuum Circuit Breaker with
Cylinder is threephase A.C.50Hz indoor power distribution equipment
with the rated
voltage of 24KV.It's used for protecting and controlling the electrical equipment in
fileds of industry & minning enterprise,power plants and
substation.This type Vacuum
Circuit Breaker conforms to national standards and the stipulation
of IEC standard,the
capability reaches grade of M2-E2-C2.
The product adopt composite insulation way,spring charged operation
and screw rod
push mechanism, with the characeristics of small volume,compact
design and reliable
operation, it can easily match with the switchgear and meet the "Five Preventions"
This kind of Vacuum Circuit Breaker can be used for many kinds of
switchgear like KYN28-24(GZS1),This series of products include:VCB
truck,isolation truck and fuse truck etc.
Applying ambient conditions
1. Ambient temperature:-15ºC~+40ºC.
2. Ambient humidity:the average humidity of a day should be no more
than 95%;the average humidity of a month should be no more than
3. Earthquake intensity:not exceed 8 degrees.
4. Saturated vapour pressure:the average pressure of a day should
be no more than 2.2kPa;the average pressure of a month should be no
more than 1.8kPa.
5. The height above sea level:1000m(besides the special
6. It should be installed in the places without
fire,explosion,serious filth,chemical erosion and violent
Main Technical Specification
|4||Rated short circuit breaking current||kA||20||25||31.5|
|5||Rated short circuit making current||kA||50||63||80|
|6||Rated short time withstand current||kA||20||25||31.5|
|7||Rated peak withstand current||kA||50||63||80|
|8||Rated power frequency withstand voltage||kV||65|
|9||Rated lighting impulse withstand voltage||kV||125|
|10||Rated short-circuit duration||s||4|
|11||Rated operating sequence||O-0.3s-CO-180s-CO|