Maintenance check of oil, vacuum and SF6 breakers with up to 4 breaks
PKV/M7 is designed for measuring characteristics of SF6, oil, magnetic-type and vacuum high-voltage circuit breaker of all types and manufactures (such as ABB, AREVA, ALSTOM, SIEMENS etc.), and of isolators and short-circuiting devices.
 
Diagnostics of domestic and foreign circuit breakers
PKV/M7 instrument is complete with attachment devices for the installation of measuring transducers on all types of Russian- and foreign-manufactured (ABB, AREVA, ALSTOM, SIEMENS, etc.) high-voltage circuit breakers. Adaptability of the instrument involves designing of transducer attachments to the circuit breakers and receiving of transfer function of movement from the shaft to the cross-arm. Transfer functions of kinematic chains of all circuit breakers are stored in the memory of the instrument. Adaptation work began with the first produced model of the instrument (PKV/?1) in 1995 and continues to this day.
 
Ranges of time intervals, speed and travel measurement sufficient for covering the needs for monitoring of existing circuit breakers
The instrument enables simultaneous measurement of the parameters of time, travel, and speed of movable parts, measurement of the time until closing/opening of controlled contacts and registration of instantaneous currents and voltages of control electromagnets.
 
High measurement accuracy
High accuracy of measurements of time characteristics (±0.1 ms), travel and speed characteristics is ensured with digital angular and linear movement pickups with resolution in 0,09° and 0.5 mm.
 
Automatic calculation of technical characteristics of high-voltage circuit breakers
The diagnostic results ar­e displayed in a table with measured and calculated parameters for each cycle operation (when processing measurement resul­ts for complex cycles, the device automatically breaks down the cycle into sim­ple operations). The tables provide such data as full and closing time of circuit breaker, full travel, snatch gap, bouncing in operation, retract, re­bound, closing speed, bouncing in time, and many others.
 
Apart from numerical data this instrument provides graphical results which allow detecting of incipient defects
Apart from tables with measured parameters, more detailed information on breaker status can be derived from registrable graphs that are navigated using cursors and scaling.
The instrument registers:
* dependence of spe­ed on time and travel;
* dependence of currents and voltages of electromagnets on time and travel;
* diagrams of clo­sing/opening processes of the contacts.
 
Monitoring of high-voltage circuit breakers in simple and compound cycles
Equipped with a power switchboard to control drives of switching devices, both DC and AC, and enables to perform both simple operations and complex cycles, including life tests.
 
Special mode “ruler/angle meter” simplifying the process of circuit breaker adjustment
It is often required to check circuit breakers by performing their switching on not from the drive but, for instance, from a jack. For this purpose PKV/M7 has a mode “ruler/angle meter”, in which the instrument shows real-time value of circuit breaker travel (shaft turn angle) or the status of contacts (close/open).
 
Proper operation in all weather conditions
If you have to carry out diagnostics in difficult weather conditions you can be sure that PKV/M7 will provide you with the most accurate results as it operates properly in the temperature range from -20 to +40°?.