Mitsubishi's VPR Type Vacuum Circuit Breakers (VCB) was developed with the design policy of SIMPLE IS BEST and is based on up-to-date technology and the rich productive experience of about 30 years.

What is the Meaning of SIMPLICITY? Simplicity means good quality, high reliability, easy maintenance and safe operation.

It is well known that Vacuum Circuit Breakers (VCB) have superior properties of the many breaker types because they are clean environmentaly friendly.

Optimum design by 3D CAD & CAE gives high relia high reliability!
(3 Dimensional Computer Aided Design & Computer Aided Engineering)
Dynamic analysis
Satisfactory operation in any situation is achieved by means of the dynamic analysis of the mechanism together with verification tests, studying the effect of  parameters such as minimum/maximum friction or spring force within the agreed tolerance.

Optimized stress analysis
The reduced number of parts reduces failure and increases quality.  CAE enables the insulated support of the three phase vacuum switching tubes (VST) to be composed of only one molded insulator.

Thermal analysis
Overheating was conquered by analysis.  The breakers have radiators which are self-cooled up to 3,150 amperes without using delicate cooling devices such as fan motors.

Dielectric property eases your mind!
The breaker are suitable for operation under the worst environmental conditions because of the longer creepage distance and the longer insulation distance compared with the IEC standard.

New technology improves maintenance!
Easy, low maintenance is brought to you by means of a newly developed greaseless low friction surface treatment and long life grease.  Many mechanical and electrical interlock systems also enable safe operation and maintenance.

Our supply record guarantees top quality!
More than 100,000 Mitsubishi Vacuum Circuit Breakers have been put in service since 1969. and are satisfactorily operating throughout the world.

Specifications and compact construction are suitable for worldwide use!
The compact design of the VCB and the optional mounting frame with earthed metal shutter make for easy application in wide range of metal-clad switchgear board sizes and enable the easy replacement of obsolete breakers in existing switch boards.

 

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