Ranges of time intervals, speed and travel measurement sufficient for covering the needs for monitoring of existing circuit breakers
Wide ranges of measurement by time (up to 5.1 sec), speed (up to 20 m/sec) and travel (up to 900 mm), covering the needs for monitoring of all existing high-voltage circuit breakers. For instance, the smaller time range of similar instruments does not allow for monitoring the operation of circuit breakers in compound cycles.
There are a number of nuances at measurement performance. For example, while registering of time characteristics of any high-voltage circuit breaker is quite a simple process, receiving of travel and speed characteristics can be performed only with the use of special linear and angular movement transducers.
PKV/M7 is supplied with incremental (discrete) transducers for measurement of speed characteristics and travel parameters which do not require adjustment or correction of conversion factors; these transducers provide accurate results and are convenient in service.
Instruments with wire rope transducers, for instance, have a limited upper value for speed. Pull-back spring of these transducers does not have enough time to reel the wire rope onto the drum in case of rapid change of speed and measurement results become less accurate. It is not recommended to use laser movement transducers as there is a risk of eye damaging by the laser beam in case of mishandling. Moreover, laser transducer is installed by sight without any fixing devices which contributes to bigger measurement errors.
