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  • Winding Resistance Test of Transformer

    Winding Resistance Test of Transformer

    10 A Transformer Resistance Tester for Weshine® Winding Resistance Test of Transformer with CE certificate, high quality and accrucy, Invented and produced according to national standards, complete electric testing solution available. Contact us for more details of Winding Resistance Test of Transformer from Weshine!
  • Interfacial Tension Between Oil and Water

    Interfacial Tension Between Oil and Water

    Weshine® Surface Tensiometer for measuring Interfacial Tension Between Oil and Water with CE certificate, high quality and accuracy, Invented and produced according to national standards, complete electric testing solution available. Contact us for more details of Winding Resistance Test of Transformer from Weshine!
  • Analog Insulation Tester

    Analog Insulation Tester

    Weshine® invented the Analog Insulation Tester with CE certificate, high quality and accuracy, Invented and produced according to national standards, complete electric testing solution available. Contact us for more details of Analog Insulation Tester from Weshine!
  • Insulation Test Meter

    Insulation Test Meter

    Weshine® invented the Insulation Test Meter with CE certificate, high quality and accuracy, Invented and produced according to national standards, complete electric testing solution available. Contact us for more details of Insulation Test Meter from Weshine!
  • Timing Test of Circuit Breaker

    Timing Test of Circuit Breaker

    Weshine® invented Circuit Breaker Analyzer for Timing Test of Circuit Breaker are advanced standalone or PC-controlled instruments for circuit breaker maintenance. Typical application areas of Weshine®'s Circuit Breaker Analyzer for Timing Test of Circuit Breaker are medium and high voltage substations at electric power generation, transmission, and factories of switchgear. Also, industrial environments and electric power distribution are suitable application areas for these Circuit Breaker Analyzer for Timing Test of Circuit Breaker. Channels provide measuring the displacement of the circuit breaker moving parts, contact wipe, over-travel, rebound, damping time, and average velocity. Even more, the VS-5308C Circuit Breaker Analyzer for Timing Test of Circuit Breaker optionally has a built-in micro-ohmmeter. Hence, it provides the main circuit resistance measurement (contact resistance measurement). Weshine® Circuit Breaker Analyzer for Timing Test of Circuit Breaker with high quality and accuracy, Invented and produced according to national standards, complete electric testing solution available. Contact us for more details of Circuit Breaker Analyzer for Timing Test of Circuit Breaker from Weshine®!
  • Relay Test Kit

    Relay Test Kit

    Given the different functional requirements of grid protection systems, testing capabilities require a higher level of sophisticated testing hardware and software to analyze the operation of the entire protection system (or individual protection components) under "real life" situations. Similar improvements in simplifying the user interface and software control of test instruments are further necessary to meet these expanding test capabilities. Rest assured, no matter how complex, every aspect of relay testing can be easily handled with Weshine®'s comprehensive line of Relay Test Kit (VS-JB900 series). Plus, whether you're testing traditional electromechanical relays or modern IEC 61850 networked devices, our rugged products deliver the high power you need while still being portable for practical testing.
  • Related Blog
  • Reviews

  • What is the open circuit voltage test?

    ​A measurement method called the open circuit voltage test is used to find the voltage that a transformer produces across its terminals when there is no load on it. There is no electricity flowing through the transformer during this test since the secondary winding is left open. Next, a voltage source equal to the transformer's rated voltage energizes the primary winding.

  • Inspection and identification methods for transformer on-load tap changer (OLTC) faults

    According to statistics, the faults of the on-load voltage regulating switch of the transformer mainly include two aspects: First, the failure of the voltage regulating switch driving mechanism, mainly including the linkage of the electric mechanism, water intrusion into the box, oil leakage from the gear box, insufficient spring energy storage, etc. The second is the failure of the switch body, which mainly includes oil leakage from the oil chamber, loose fasteners, stuck contact motion, and poor contact caused by contact wear. The common fault types of on-load voltage regulating switches are listed and analyzed below.

  • Different measurement methods for DC resistance testers

  • How reduce the copper and iron losses of transformer?

    ​1. Choosing a lower current density and reducing the number of turns will increase the magnetic flux density of the iron core and increase iron loss.

  • What are the precautions for using a zinc oxide lightning arrester tester?

    ​1. Do not plug or unplug the measuring wire when inputting current and voltage to avoid damaging the zinc oxide lightning arrester tester.

  • The principle and significance of testing methods for grounding resistance in substations

    ​In recent years, many substations in China have experienced expanded accidents due to lightning strikes. Most of the grounding resistance related to the grounding grid is unqualified, which plays a role in working grounding and protective grounding. When the grounding resistance is too high, a grounding fault occurs, and the neutral point voltage offset increases, which may cause the sound phase and neutral point voltage to be too high, leading to equipment damage and exceeding the required insulation level.

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