HZZJ-H Current Transformer CT Field Calibrator

Product Introduction

High-voltage electric energy metering device of power plant, substation, and a large number of users, related to various interest of power generation, power transmission, power supply and users. In order to ensure accurate measurement, the inspection must be in accordance with the SD109 "electric energy metering device test procedures" and DL / T448-2000 "technical management of electric energy metering rules".

My company's HZZJ-H Current Transformer Field Tester is developed based on high-end test technology, large scale electronic circuit design and meet the relevant state regulations. It solves the problems that the field test current transformer, voltage transformer working intensity, complicated operation, at the same time, performance of the product is reliable and powerful.

Characteristics

1. HZZJ-H Current Transformer Field Tester with recursive method to measure current transformer error function, convenient for carrying out calibration work of field metering device.

2. HZZJ-H Current Transformer Field Tester without using Standard Current Transformer, Current Source, Load Box, Double Adjustable Control Box and Primary cable, using extremely simple test connection and operation to realize the current transformer test, greatly reduce work intensity and improve the work efficiency, convenient to carry out current transformer field test work.

3. The interior of HZZJ-H Current Transformer Field Tester is equivalent to the measured current transformer with the same ratio of the standard current transformer, the accuracy can reach 0.05S, measure accurately the ratio of measured current transformer and load error. Then combined with the impedance and admittance test results to deduce the transformer error.

4. It adopts variable frequency power supply test which close to the power frequency, preventing the field power frequency electromagnetic radiation and series interference.

5. Measurement range is wide, can reach to 5A/5A~25000A/5A or 5A/1A~6300A/1A.

It has the function of current transformer ratio, secondary winding resistance test.

It adopts 800×600 high resolution and large screen liquid crystal display, has humanization interface and operation design, uses touch screen for auxiliary operation, make the operation more convenient and swift.

It adopts precise software algorithms, make the accuracy of measurement data improve further.

It has intelligent judgment external connection state, tips for wiring error, ratio, polarity error and so on.

It breaks up the whole of test data automatically, and judges whether ultra difference, ultra difference data appears orange, and shows ultra difference in the lower right corner of the window, the transformer data characteristics is intuitive and clear.

Issue directly field verification conclusion, qualified or ultra difference.

Large memory can store up to 1000 field test data.

It adopts RS232 or USB interface to connect computer and print data certificate.

It adopts engineer plastic mold box to avoid shock and pressure, secure the safety of field operators and equipment.

Main Technical Parameters

1: Current Transformer Error Test Parts:

①Instrument Accuracy：measured current transformer error limit of 1 / 3

②Test Range：5A/5A~25000A/5A or 5A/1A~6300A/1A

Rated primary current range of secondary current is 5A transformer
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

Rated primary current range of secondary current is 1A transformer
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：Current transformer of secondary current is 1A,though equal ampere-turns measurement method to 31500A / 1A ratio. Other test methods that did not appear in the table of the current transformer ratio as bellow:

Using equal ampere-turns to test current transformer, for example, test 1000A/5A transformer, please feed-through the measured current transformer for two turns with the ancillary test line, then make the first current of current transformer test interface be 500A. The test method doesn't affect the validity of transformer test data.

Similarly to other ratio using the following methods: