Basic Info.

Product Description

ERFA-24 Series of Indoor High Voltage Vacuum Circuit Breaker
with Common Insulated Cylinder

General Description
ERFA-24 series of Indoor High Voltage Vacuum Circuit Breaker with Common Insulated
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 the
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"
demands.
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 90%.
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 requirements).
6. It should be installed in the places without fire,explosion,serious filth,chemical erosion and violent vibration.
Main Technical Specification

S.N Name Unit Data 1 Rated voltage kV 24 2 Rated current A 630 1250 1600 2000 2500 3150 3 Rated frequency Hz 50 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 12 DC component 50% 13 Mechanical endurance Cycle 10000

Xi'an ERFA Switchgear Co.,Ltd is under ERFA Industries group, was established in 2006, It is located in moden enterprise central, and has a registered captial of RMB60 millions and specializes in developing, manufacturing and selling high voltage and low voltage electrical products.

Our company professional developed: ZN63A(VS1)-12 VCB (vacuum circuit breaker), ERFA (ZN73A)-12 permanent magent VCB, ZN163 (ZN)-24 VCB, ERFA-40.5 VCB, ect.