Smart test devices for reliable electric power systems

DV Power, established in 2000 has developed light and ingenious test solutions for transformers, circuit breakers, batteries and electrical safety. It is possible to perform a wide range of tests for each group of equipment. 

For power and distribution transformers, two most essential tests are winding resistance and turns ratio. Besides these, the products can perform many other tests, such as frequency response, excitation current, vector group detection, on-load tap changer DVtest (DRM), demagnetization, and heat run test.  

For instrument transformers (CTs, VTs, and CVTs) a variety of special tests can be performed (knee point, turns ratio, polarity, demagnetization, winding resistance, burden test, and insulation resistance).

For rotating machines, a user can measure winding resistance with a wide range of testing currents for testing small to extra-large units.

Circuit breakers are an important part of the protection systems and their reliability is crucial for the reliability of the entire power system. Failure to trip or reduced tripping speed is an important Circuit Breaker’s failure mode and therefore manufacturers recommend testing at regular intervals. DV Power has released various portable and handheld models for condition assessment of medium and high voltage Circuit Breakers’ during the manufacturing, commissioning and maintenance stages.

Batteries are a crucial part of various power systems. It is necessary for batteries to be inspected regularly to monitor their condition and maximize their lifetime. DV Power has designed cutting edge solutions for condition assessment of any type of batteries, by performing the capacity test as well as internal resistance, voltage and temperature measurement, and battery charging solutions.

The ground grid integrity (continuity) and protective earth bonding tests are the most relevant testing methods for measuring the electrical characteristics of the substation grounding systems. Using the DV Power’s Electrical Safety Test Equipment, it is very convenient to inspect and verify the condition of the grounding grid without the need to de-energize the substation.