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Product Overview

SXFA-AV CT/PT Onsite Test System consists of:

Features

♦ Integrated with calibrator, load box, regulator, easy to connection.

♦ Secondary current to be switched by rotary.

♦ External regulator and current injection could be connected to increase or adjust capacity easily.

♦ Protective circuit, reliable and safe.

♦ Under CT/PT measuring, the impedance of secondary circuit or the active component and idle component of admittance could be measured at any time.

♦ Polarity could be indicated automatically, and auto break differential current/voltage circuit to insure the safety and alarming by sound light.

♦ To be used as rectangular coordinate system AC potentiometer, to measure the AC low current or low voltage.

♦ To be used with isolating PT and control unit to measure the secondary drop voltage of PT.

♦ The reference CT/PT or two stage CT/PT or Inductive Divider all could be used as standard reference during measuring.

♦ LCD screen, English interface.

♦ 40 groups CT storage, the 1% error results also can be stored.

♦ PC and corresponding software could be connected to operate.

♦ Build-in printer.

Specifications

1. CT/PT Analyzer

♦ Temperature:5℃--40℃ RH:<80%(25℃) Altitude:<2500m

♦ Supply frequency:50Hz±0.5 Hz Supply voltage:220V±5V

♦ Measuring range:

Cophase component(%): 0.0001～200.0 Resolution:0.0001

Flash component:0.001～700.0 Resolution:0.001

Impedance(Ω): 0.0001～20.0 Resolution:0.0001

Admittance(ms)： 0.0001～20.0 Resolution:0.0001

♦ Intrinsic error:

Cophase component:ΔX=±（X×2%＋Y×2%±Dx）(one degree is optional)

Quadrature component:ΔY=±（X×2%＋Y×2%±Dy）(one degree is optional)

“X”、“Y”——Displayed value

“Dx,Dy”——Displayed value

“Dx, Dy” quantization error

Dx=2, Dy=5

Dial indicator: 1.0 degree

2. PT Load Box

♦ Working condition:

Temperature: 5—40℃

Relative Humidity:<80%(25℃)

Altitude:<1500m

♦ Rated capacity：1.25～158.75VA

♦ Voltage range：20%-120%

♦ Secondary voltage: 100V

♦ Power factor：0.8 ,1.0

♦ Accuracy：±3%±0.01VA

♦ Testing voltage：2kV

♦ Rated frequency:50Hz

3. CT Load Box

♦ Working Condition:

Temperature：5—40℃ Humidity:<80%(25℃)

Altitude:<1500m Supply frequency：50Hz

♦ Rated capacity：80VA （O-3.2Ω）

♦ Measuring range：5%-120%

♦ Secondary current: 5A

♦ Power factor：0.8, 1

♦ Accuracy: ±3%±0.0025VA

♦ Testing voltage：2KV

4. Self Current Injection CT

As the standard to detect CT, which is 2(or below) accurate degree lower than this standard.

♦ Temperature：-5— +40℃

♦ Humidity:﹤80%

♦ Capacity：5VA, COSφ=0.8, 1.0

♦ Allowed rate current long time working，above 150A cross-core.

♦ Weight：﹤40kg

♦ Standard current ratio：2000A/5A

♦ Accurate degree：0.02S degree

5. Self Boosting PT

♦ Rated voltage ratio ：10KV/100V, 10/ KV/√3 100/√3V

♦ Rated secondary capacity: 0.2VA, 0.07VA, 0.02VA CosФ=1.0

♦ Accurate degree: 0.02 degree. That’s under rated load, when voltage within the range between 80%Un to 120% Un，the ratio error is not more than 0.05%，angular error is not more than 2'. When voltage is 50% Un，ratio error is not more than 0.075%，angular error is not more than 3'. When voltage is 20% Un，ratio error is not more than 0.1%，angular error is not more than 6'.（Real error is not more than 60-70% of error limitation）

♦ Testing voltage: Primary winding induced voltage is 1.2 Un，1minute. Secondary winding to the earth, power frequency withstand voltage 2KV，1 minute.

♦ Rated frequency: 50Hz

♦ Trolley and handle installed, easy to move and lift.

6. Self Boosting PT

♦ Can calibrate PT which is 35kV, 0.02 degree or below. Connected with induced divider, can calibrate 110kV/√3 /100/√3 V PT, calibrate rated voltage from 20% to 66%.

♦ Rated voltage ratio： 35 kV /100V, 35kV/√3/100/√3V, 35kV/√3/100/3V

♦ Rated secondary capacity：0.2VA, 0.07VA, 0.02VA CosФ=1.0

♦ Accuracy degree： 0.02, 0.1 degree, that’s under rated load, when voltage is within 80%Un to 120% Un， ratio error is not more than±0.02%，angular error is not more than ±0.6'. When voltage is 50% Un，ratio error is not more than±0.03%，angular error is not more than ±0.9'. When voltage is 20% Un，ratio error is not more than ±0.04%，angular error is not more than ±1.2'.（real error is not more than 70% limitation）

♦ Testing voltage: Primary winding induced voltage is 1.2 Un，1minute. Secondary winding to the earth, power frequency withstand voltage 2KV，1 minute.

♦ Rated frequency: 50HZ

7. Dual Regulating Controller

Suitable for regulating controlling on 0.5-100kVA testing transformers. Working principle: Output voltage via regulating autotransformer, to realize the testing transformer’s working regulating, within which rated voltage range. HV and LV output voltage meters are installed in the controller, it’s easy to read voltage value. Over-current protection circuit, timing alarm circuit make testing more convenient and reliable.

Dual regulating, fine regulating.

8. Large Current Leads

The max. output capacity should be well matched with booster (current injector), so that the output of regulator can be ensured 10% more than measuring range.

1000A *3m * 1

500A * 3m * 2

250A * 3m * 2

100A *3m * 2

9. Secondary Current/Voltage Cable

To be used for connection of units.

10. 10 CT/PT Calibrating Software

To be used for operating.