1.Profile
Transformer Tester is new product created after widely adopt customers’ advices and deep theoretical study. It is based on the automatic FA Series Transformer Tester General which is produced by our company that is widely acclaimed and applied. The adoption of high-performance DSP and ARM, advanced manufacturing technology ensure a stable and reliable product performance, full-featured, high degree of automation, high efficiency, in the domestic leading level, they are the professional testing equipments for transformer check in power industry.
2.Advantage
1)Full-featured, not only satisfy the test requirements of various CTs (include TP class), such as the excitation characteristics (i.e., volt-ampere characteristics), ratio, polarity, secondary winding resistance, secondary burden, ratio error and phase displacement, but can also be used for the tests of various PTs, including excitation characteristics of the electromagnetic unit, ratio, polarity, secondary winding resistance, ratio error and phase displacement.
2)Automatically give CT, VT parameters, including knee point voltage / current, 10% error curve, the accuracy limit factor (ALF), instrument security factor (FS), the second time constant (Ts), remanence coefficient (Kr), saturated and unsaturated inductance etc.
3)Test meet IEC60044 GB1208 (-1) GB16847 (IEC60044-6) became etc all kinds of transformer standards, and in accordance with the transformer types and levels of automatic choose which standard test
4)Based on advanced principle of low-frequency test method that can meet the CT test on knee voltage up to 30KV.
5)Friendly interface beautiful, all Chinese graphic interface
6)The instrument can store 2000 groups of test data that won’t be lost when power off. After test ended, the data can be coped to PC by USB disk for analysis and being transformed into WORD report.
7)Test is simple and convenient, one-click can complete tests of CT secondary resistance, excitation, ratio and olarity.
8)Easy to carry, because the weight is less than 9Kg.
3.Technical parameter
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Usage
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Class P/TP CT & VT
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Output
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0~180Vrms，12Arms，18A（peak value）
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Voltage measurement accuracy
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±0.05%
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CT Ratio
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Range
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1~30000
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accuracy
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±0.05%
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PT Ratio
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Range
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1~30000
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accuracy
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±0.05%
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Phase
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Range
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±5min
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accuracy
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0.5min
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DC resistance
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Range
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0~300Ω
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accuracy
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2%±2mΩ
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Burden
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Range
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0~300VA
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accuracy
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2%±0.2VA
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Power supply
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AC220V±10%，50Hz
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Environmental Conditions
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Operating temperature :-10ºC~50ºC,Humidity :≤90%
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Weight and Dimensions
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Dimensions:340 mm×300 mm×150mm,Weight<9kg
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4.Test Result
1) CT Test result
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result
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description
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P
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TPY
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M
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PR
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PX
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TPS
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TPX
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TPZ
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Load
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Actual load
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unit：VA，CT secondary measure actual load
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√
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√
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√
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√
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√
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√
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√
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√
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Power factor
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Power factor of actual load
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√
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√
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√
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√
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√
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√
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√
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√
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impedance
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unit：Ω，CT secondary measure secondary impedance
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√
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√
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√
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√
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√
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√
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√
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√
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Resistance
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resistance（25℃）
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unit：Ω，CT secondary measure secondary resistance
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√
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√
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√
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√
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√
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√
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√
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√
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resistance（75℃）
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unit：Ω，Convert to resistance under 75℃
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√
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√
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√
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√
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√
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√
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√
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√
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excitation
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knee voltage and knee current
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unit:V and A，According to standard definition，when knee voltage increase 10%,knee current increase 50%.
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√
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√
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√
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√
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√
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√
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√
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√
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Unsaturated inductance Lu
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unit:H,The average inductance of linear section for excitation curve
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√
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√
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√
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√
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√
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√
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√
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√
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remanence coefficient Kr
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ratio of magnetism and magnetic
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√
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√
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√
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√
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√
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√
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√
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√
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Second time constant Ts
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unit：s,the time constant of CT's second connect rated burden
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√
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√
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√
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√
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√
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√
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√
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√
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limiting e.m.f Eal
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unit:V,calculation limit e.m.f. according to the CT nameplate and resistance under 75℃
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√
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√
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√
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√
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√
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√
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composite error
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limiting e.m.f or the composite error of rated knee potential
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√
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√
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√
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√
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Peak transient error
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Peak transient error of limiting e.m.f
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√
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√
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√
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ALF
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actual ALF
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√
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√
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|
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Instrument security coefficient
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actual instrument security coefficient
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√
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|
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|
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Symmetrical short-circuit current multiples Kssc
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actual symmetrical short-circuit current multiples
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√
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|
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√
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√
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√
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transient dimensioning factor
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actual transient dimensioning factor
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√
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√
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√
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calcuated coefficient Kx
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actual calcuated coefficient
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√
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Rated knee potential Ek
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√
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Ie corresponding with Ek
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The actual excitation current corresponding with rated knee potential
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√
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Rated voltage Ual
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The rated equivalent second limit voltage
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√
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Ial corresponding with Ual
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The actual excitation current corresponding with the rated equivalent second limit voltage
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√
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Ratio
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Ratio
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Actual current ratio under rated burden
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√
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√
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√
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√
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√
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√
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√
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√
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Turns ratio
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The ratio of actual secondary winding and primary winding
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√
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√
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√
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√
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√
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√
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√
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√
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Ratio difference
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The current errors under rated load
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√
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√
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√
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√
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√
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√
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√
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√
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Phase difference
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The D-value of phase under rated load
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√
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√
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√
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√
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√
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√
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√
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√
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Polarity
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There're two polarity relationship for primary CT and secondary CT: Positive and Negative
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√
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√
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√
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√
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√
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√
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√
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√
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Turn ratio error
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The relative error between measured trun ratio and rated turn ratio
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√
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√
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2) PT test result
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result
|
description
|
P
|
M
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Resistance
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resistance（25℃）R
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unit：Ω，resistance value under current temperature
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√
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√
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resistance（75℃）Rref
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unit：Ω,Resistance value under reference temperature(the temperature is variable)
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√
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√
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excitation
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knee voltage and knee current
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unit:V and A，According to standard definition，when knee voltage increase 10%,knee current increase 50%.
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√
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√
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Ratio
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Ratio
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Actual current ratio under rated burden
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√
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√
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Turns ratio
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The ratio of actual secondary winding and primary winding
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√
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√
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Ratio difference
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The current errors under rated load
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√
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√
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Phase difference
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The D-value of phase under rated load
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√
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√
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Polarity
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There're two polarity relationship for primary and secondary , Positive and Negative
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√
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√
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0.1Hz VLF AC/DC Hipot tester
