in the EP-4000 ?

General Information:

Vacuum circuit breaker is a common method for judging whether the vacuum degree of the vacuum tube has deteriorated is the power frequency withstand voltage method. This method is only an arc extinguishing chamber that can judge the serious deterioration of the vacuum degree. When the vacuum degree deteriorates to 10-2----10-1 Pa, although the breakdown voltage does not decrease, the arc extinguishing chamber has already failed. EP-4000 vacuum switch vacuum degree tester adopts a new excitation coil, and uses the magnetron discharge method to test the vacuum degree of the arc extinguishing chamber without disassembling the arc extinguishing chamber. At the same time, the microcomputer is used for synchronous control and data acquisition and processing, so that the field test sensitivity of the vacuum degree of the arc extinguishing chamber reaches 10-5Pa. The most prominent feature of this instrument is the use of a new excitation coil and data processing method to achieve the measurement of vacuum without disassembly. This instrument has the advantages of convenient use, simple operation, no disassembly measurement and high test accuracy. It is a practical testing instrument widely used in power, steel, petrochemical, textile, coal, railway and other departments that use vacuum switches.


--To measure quantitatively on vacuum degree of various vacuum switches interrupters.
--To measure the vacuum interrupter without dismounting.
--Test result is accurate and reliable.
--LCD English display, easy to operate.
--RS232 port, can communicate with computer easily.
--Light weight and portable, it’s suitable for on-site test.

Technical Specifications:

Test object:

Various types of vacuum switch tubes.

Detection method:

The new excitation coil is used for the measurement of the vacuum tube without disassembly.

Scope of application:

This instrument is a multi-purpose machine, which can measure various types of vacuum switches.

Detection range:

10-5—10-1 Pa

Measurement accuracy:

10-5—10-4 Pa, 10%

10-4—10-3 Pa, 10%

10-3—10-2 Pa, 10%

10-2—10-1 Pa, 10%

Magnetic field voltage:


High voltage of pulse electric field:


The opening distance of the switch tube when testing the vacuum degree:

Normal use opening distance.

Operation Temperature



Magnetron coil


410×320×370 (mm)

Weight (N.W.)