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ZXCT-H Current Transformer Field Calibrator

The high-voltage electric energy measurement devices of power plants and substations, and the electric energy measurement devices of a large number of users, are related to the interests of power generation, power transmission, power supply and multiple parties of users. In order to ensure accurate measurement, the inspection must be carried out in accordance with SD109 "Inspection Regulations for Electric Energy Measurement Devices" and DL / T448-2000 "Technical Management Regulations for Electricity Measurement Devices".

ZXCT-H current transformer field calibrator was developed based on high-end testing technology, large-scale electronic circuit design and in compliance with relevant national regulations. It solves the problems of on-site verification of current transformer and voltage transformer with high working intensity and tedious operation. At the same time, the product has reliable performance and powerful functions.


Features
Technical indicators

1. Current transformer error measurement section

1) Overall accuracy: 1/3 of the error limit of the measured current transformer

2) Test range: 5A / 5A ~ 25000A / 5A or 5A / 1A ~ 6300A / 1A

Transformer rated primary current range with secondary current of 5A

5

7.5

10

15

20

25

30

40

50

60

75

80

100

120

150

160

200

250

300

315

400

500

600

630

750

800

1000

1200

1250

1500

1600

2000

2500

3000

3150

3200

4000

5000

6000

6300


Transformer rated primary current range with secondary current 1A

5

7.5

10

15

20

25

30

40

50

60

75

80

100

120

150

160

200

250

300

315

400

500

600

630

750

800

1000

1200

1250

1500

1600

2000

2500

3000

3150

3200

4000

5000

6000

6300


Note: The current transformer with a secondary current of 1A can be converted to 31500A / 1A by the method of equal-ampere turns measurement. Other test methods for the current transformer ratios that do not appear in the table are as follows:

Use the equal ampere-turn method to test the current transformer, for example: you need to test the 1000A / 5A transformer, please pass the test wire of the instrument through the two turns of the current transformer, and then test A current input is only 500A. This test method does not affect the validity of the transformer test data.

 Similarly, other transformation ratios use the following processing methods:

Rated once (A)

Number of turns

Instrument primary current (A)

80

2

40

120

2

60

8000

2

4000

12000

2

6000

 

3) Working range of the tested current transformer: 1% 200%

4) Secondary load: 2.5VA 300VA, COSφ = 0.1 1.0

5) Accuracy range of tested current transformer: 1.0, 0.5, 0.5S, 0.2 and 0.2S

6) Resistance / admittance measurement error: ≤5.0%

7) Measuring range: R: 0.00Ω 20.0Ω

              Y: 0.000mS 100.0mS

2. Part of the voltage transformer calibrator

1) Basic error:

a. In-phase component:

2. Part of the voltage transformer calibrator

1) Basic error:

a. In-phase component: X = (X × 2% + Y × 2% 2 words)

     Y = (X × 2% + Y × 2% 5 words)

     "X", "Y"-display value of the instrument

     "5 words"-quantization error of the instrument

b. Percentage Table: Level 1

c. Measuring range: f: 0.0000% 200.0%

             Δ: 0.000 ′ 999.9 ′

3. Instrument power consumption: 20VA

4. Instrument accuracy level: 0.05S level

5. Maximum external dimension: 460 × 375 × 183mm

6. Weight: 10.0kg


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