VB4P medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 12~24kV and frequency 50/60Hz,widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc.,
Detail
General
VB4P medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 12~24kV and frequency 50/60Hz,widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment, especially, It is used for the occasion that needs infrequent operation at rated current or multi-breaking short circuit current, may be mounted in the indoor air insulating switchgear like type KYN28 or AMS, ABB type ZS1 series, etc. This circuit breaker is standards as GB1984-2003 AC high voltage circuit breaker,JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker,DL/T403 Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker for order as well as IEC60694.
This circuit breaker is made with mature APG technology. The application of VB4P terminal buffer guarantees the indoor terminal is ever more reliable in nay operation environment. VB4P can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries.
Service Environment
a) Air temperature: Maximum temperature: +40℃; Minimum temperature:-25℃
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
Main Technical Specifications
No | Item | Unit | Parameter | |
1 | Rated voltage | kV | 12/17.5 | 24 |
2 | Rated frequency | Hz | 50/60 | |
3 | Rated current | A | 630, ……4000A | |
4 | 1min Power frequency withstand voltage | kV | 48 | 65 |
5 | Lightning impulse withstand voltage | kV | 75/95 | 125/150 |
6 | Rated short circuit breaking current (peak) | kA | 50/63/80/100 | |
7 | Rated active load and close circuit breaking current | A | 63 | 50 |
8 | Rated short breaking current | kA | 31.5 | |
9 | Rated short circuit making current (peak) | kA | 50/63/80/100 | |
10 | Rated cable(line) charging breaking current | A | 50 and 10 | |
11 | Rated capacitor bank switching current | A | 400 | |
12 | Rated withstand current (peak) | kA | 50/63/80/100 | |
13 | Short time withstand current (4s) | kA | 20, …40 | |
14 | Mechanism life | times | 10000 |
Note: For short circuit breaking current & rated current is optional by clients.
3D Mechanism Introduction
① Secondary circuit plug
② Mechanism tank
③ Modular Mechanism
④ Anti jump Integrated PCB board
⑤ Tulip contact
⑥ Embedded pole
⑦ Contact arm
⑧ Shutter driver
⑨ Racking trolley
Innovative Product Design
Damper with Perfect Performance Special Design of Repair Without Many Tools During the design for VB4P circuit-breaker, the installation and repair must be taken into account. So for the disassembly of parts or accessories, users need no special tools and the repair becomes more convenient. Besides, all of the secondary controlling components are in front of the operating mechanism, which also make maintenance and repair convenient. Modularized Operating Mechanism Self-lubricative Bearing Without Oil Conductors with Silvered Surface | Single closing spring device Self- lubricative Bearing without Oil
Conductors with Silvered Surface
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Embeded Pole Design
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Vacuum Interrupter with Excellent Performance
● Unique R-shaped Contact Terminal Design
● Complete One-Time Sea-Exhaust Technology
● High & Stable Quality Ceramic Metallization Technology
● Stainless Steel Direct Rivet Weld Technology
Installation Size
Withdrawable circuit-breakers overall size(suiable for KYN28/ZS1 also)