12/24kv-1250A-31.5ka Indoor Drawable Type Embeded Pole Vacuum Circuit Breaker (vcb)

June 11, 2023

Model NO.: VB4
Poles Number: 3
Type: Circuit Breaker
Function: Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection), Customized by Relay Protection
Certification: ISO9001-2000, Type Test
Trademark: Farady
Transport Package: Wooden Case
Specification: Embeded pole
Origin: P. R. China
HS Code: 8535210000
12/24kv-1250A-31.5ka Indoor Drawable Type Embeded Pole Vacuum Circuit Breaker (vcb)

12/24kV-1250A-31.5kA indoor drawable type embeded pole vacuum circuit breaker(vcb)
Description
VB4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.
VB4 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
Their switching capacity is sufficient to handle any conditions arising from switching of equipment and system components under normal operating and fault conditions, particularly short-circuits, within the parameters of their technical data. The vacuum circuit-breakers of type VB4, designed in column form, can be supplied both as individual units for fixed installation and mounted on chassis. Vacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.
 
Advantages
Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. VB4 vacuum circuit-breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:
Short-circuit currents;
Overhead lines under load and, no-load conditions;
Cables under load and no-load conditions;
Transformers under load and no-load conditions;
Generators under load and no-load conditions;
Ripple control system;
Capacitor banks(also parallel switching) and Motors with starting currents above 600A;
 
Application

Cable control and protection
Overhead control and protection
Transformers and distribution substations
Motor and transformer control and protection
Generator control and protection
Capacitor bank control and protection

Main characteristics
Rated voltage1) kV 12 24 • / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
••
••
Rated frequency Hz 50 -60 50 - 60
Rated normal current   630...40002) 630.25
Rated short-circuit breaking current (symm.) kA 16.31.5 40 50 63 16.31.5
Rated short-circuit making current kA 40.8 100 1254) 158 40.8
Rated duration of short-circuit4) s 3 3 3 3 3
Fixed- / withdrawable Version   • / • • / • • / • • / - • / •
Max. overall dimensions
(fixed Version)		 mm
p
H
a
b
c		 150-275
205-310
450-700
424 
461-5996)		 210-275
310
570-700
424
5996)		 210-275
310
600-750
459
6088)		 275
310
750
459
677		 210-275
310
570-700
424
631-661
Weight kg 73-105 94-180 147-260 265 100-110
Embedded Pole   • • •   •
Assembled Pole         •  

1) Test voltage according IEC62271-100
2) 4000 A with forced cooling
3) 3150 A with forced cooling in APG technology
4) Higher values on request
5) 360 mm for fixed, 280 mm for withdrawable Version
6) Circuit-breaker with heat sink 616 mm
7) Withdrawable Version
8) Circuit-breaker with heat sink 634 mm


 

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