Wuhan Goldsol Co. Ltd.
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Name: Luo Zhengping (Director)
Tel: 86-27-82423362
Fax: 86-27-82949301
E-mail: goldsol@foxmail.com
Add: Add: 128 Sanyang Road Wuhan China
MSN: goldsol@outlook.com
Skype: Gogoluo
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Products

CT PT comprehensive characteristic tester

CT PT comprehensive characteristic tester CT PT comprehensive characteristic tester CT PT comprehensive characteristic tester CT PT comprehensive characteristic tester
Product name:CT PT comprehensive characteristic tester
Item:GLDL-403
Details:
 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

 

 

Usage

Class P/TP CT & VT

Output

0~180Vrms12Arms18Apeak value

Voltage measurement accuracy

±0.05%

CT Ratio

Range

1~30000

accuracy

±0.05%

PT Ratio

Range

1~30000

accuracy

±0.05%

Phase

Range

±5min

accuracy

0.5min

DC resistance

Range

0~300Ω

accuracy

2%±2mΩ

Burden

Range

0~300VA

accuracy

2%±0.2VA

Power supply

AC220V±10%50Hz

Environmental Conditions

  Operating temperature :-10ºC~50ºC,Humidity :≤90%

Weight and Dimensions

Dimensions:340 mm×300 mm×150mm,Weight<9kg

 

4.Test Result

1) CT Test result

result

description

P

TPY

M

PR

PX

TPS

TPX

TPZ

Load

Actual load

unitVACT secondary measure actual load

Power factor

Power factor of actual load

impedance

unitΩCT secondary measure secondary impedance

Resistance

resistance25

unitΩCT secondary measure secondary resistance

resistance75

unitΩConvert to resistance under 75

excitation

knee voltage and knee current

unit:V and AAccording to standard definitionwhen knee voltage increase 10%,knee current increase 50%.

Unsaturated inductance Lu

unit:H,The average inductance of linear section for excitation curve

remanence coefficient Kr

ratio of magnetism and magnetic

Second time constant Ts

units,the time constant of CT's second connect rated burden

limiting e.m.f Eal

unit:V,calculation limit e.m.f. according to the CT nameplate and resistance under 75 

 

 

composite error

limiting e.m.f or the composite error of rated knee potential

 

 

 

 

Peak transient error

Peak transient error of limiting e.m.f

 

 

 

 

 

ALF

actual ALF

 

 

 

 

 

 

Instrument security coefficient

actual instrument security coefficient

 

 

 

 

 

 

 

Symmetrical short-circuit current multiples Kssc

actual symmetrical short-circuit current multiples

 

 

 

 

transient dimensioning factor

actual transient dimensioning factor

 

 

 

 

 

calcuated coefficient Kx

actual calcuated coefficient

 

 

 

 

 

 

 

Rated knee potential Ek

 

 

 

 

 

 

 

 

Ie corresponding with Ek

The actual excitation current corresponding with rated knee potential  

 

 

 

 

 

 

 

Rated voltage Ual

The rated equivalent second limit voltage

 

 

 

 

 

 

 

Ial corresponding with Ual

The actual excitation current corresponding with the rated equivalent second limit voltage

 

 

 

 

 

 

 

 Ratio

 Ratio

Actual current ratio under rated burden

Turns ratio

The ratio of actual secondary winding and primary winding

Ratio difference

The current errors under rated load

Phase difference

The D-value of phase under rated load

Polarity

There're two polarity relationship for primary CT and secondary CT: Positive and Negative

Turn ratio error

The relative error between measured trun ratio and rated turn ratio

 

 

 

 

 

 

 

2) PT test result

result

description

P

M

Resistance

resistance25R

unitΩresistance value under current temperature

resistance75Rref

unitΩ,Resistance value under reference temperature(the temperature is variable)

excitation

knee voltage and knee current

unit:V and AAccording to standard definitionwhen knee voltage increase 10%,knee current increase 50%.

 Ratio

 Ratio

Actual current ratio under rated burden

Turns ratio

The ratio of actual secondary winding and primary winding

Ratio difference

The current errors under rated load

Phase difference

The D-value of phase under rated load

Polarity

There're two polarity relationship for primary  and secondary , Positive and Negative

 

 

 

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