- Energy Meter Field Calibrator
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Transformer Test Equipment
- Transformer Test Bench
- Turns Ratio Tester
- DC Resistance Tester
- Transformer Tan Delta Tester
- Sweep Frequency Response Analyzer
- Partial Discharge Tester
- CT PT Analyzer
- Transformer On-Load Tap-Changer Tester
- Short-Circuit Impedance And No-load Integrated Tester
- Winding Resistance And Turns Ratio Integrated Tester
- Transformer Capacitance And Inductance Tester
- Transformer Capacity And Characteristic Tester
- Lightning Arrester Tester
- Short-Circuit Impedance Tester
- Transformer Oil Test Equipment
- SF6 Gas Analyzer
- Secondary Injection Relay Test Set
- Resistance Tester
- Power Quality Analyzer
- HV Switch Tester
- High Voltage Test Equipment
- Cable Fault Locator
- Battery Tester
0102030405
Huazheng HZ-3320D 3 Phase Transformer DC Winding Resistance Tester
Overview
The DC resistance of the transformer is a mandatory test item for the semi-finished
products, finished product factory tests, installation, handover tests and preventive tests of the power sector in the manufacture of transformers, which can effectively find manufacturing defects such as material selection, welding, loose connection parts, lack of shares, broken wires and hidden dangers after operation of the transformer coil. In order to meet the needs of rapid measurement of dc resistance of transformers, We has developed a new generation of JYR series DC resistance testers by using its own technical advantages. The instrument adopts a new power supply technology, which is characterized by small size, light weight and large output current. It is a test instrument optimized for measuring the DC resistance of three-phase windings of large-capacity transformers. The three-phase winding DC resistance of the transformer can be tested simultaneously. For on-load voltage regulating transformers, there is no need to discharge, directly adjust the tap, the measurement time is one-third of the traditional single-phase measurement, which can greatly shorten the working time. The whole machine is controlled by a single-chip microcomputer, which automatically completes the functions of self-test, data processing, display, etc., and also has functions such as automatic discharge and discharge sound alarm indication. This instrument test data is stable, high precision, fast speed, good repeatability, is the best choice for on-site measurement of transformer DC resistance.
Security Measures
1. Be sure to read this manual carefully before using this instrument.
2. The operator of the instrument should have common knowledge of the use of general electrical equipment or instruments.
3. This instrument can be used indoors and outdoors, but it should be avoided in places such as rain, corrosive gases, excessive dust, high temperature, and direct sunlight.
4. This instrument is a high-precision instrument, should avoid severe vibration, transportation should take certain shock absorption measures.
5. Repair, maintenance and commissioning of this instrument shall be carried out by professionals.
6. In order to ensure personal safety, a reliable ground wire should be connected before the power supply is turned on, and the removal of the ground wire should be carried out after the power supply is removed.
7. During the test, it is forbidden to disassemble and move the test clip and power supply line. After the test is completed, it is necessary to wait for the discharge alarm sound to end before the test line can be removed.
8. For unloaded voltage regulated windings, it is not allowed to switch the loadless tap-changer during the test or when the power is not discharged.
9. During the test, the power supply is suddenly cut off, the instrument will begin to discharge automatically, at this time it is not allowed to immediately dismantle the test line, and the test line can be dismantled after the discharge alarm sound is over.
Performance Characteristics
1. Fixed current output (10mA-20A total 8 gears), automatic current output (0.03-20A
automatically set the optimal current according to the resistance value of the sample).
2. With a wide measuring range (0Ω-20K Ω), it can measure inductive DC resistance such as transformers and transformers.
3. It has the functions of single-channel measurement, YN three-phase simultaneous
measurement, YN three-phase compensation simultaneous measurement (including O-phase resistance), YND11 transformer automatic magnetization, YN three-phase phase selective measurement, D/Y three-phase phase selective measurement, and automatically calculates the three-phase resistance balance rate.
4. Assist in judging data stabilization function. Automatically calculates the percentage of
resistance deviation of 5", 15" or 30" to accurately determine the readability of data and
prevent misreading of data.
5. According to the temperature conversion function of the test material (copper, aluminum), it is convenient to compare with historical data.
6. It has the function of transformer demagnetization, which can effectively reduce the residual magnetism of the transformer.
7. With perpetual calendar, 100 sets of data storage, Chinese and English interface selection and other functions, shutdown does not lose data. There is also a micro printer, "USB stick" interface.
8. The monitor adopts a 6-inch color touch LCD screen.
9. Dual RS485 communication interface, convenient cascading between devices. With the host computer control software, to achieve long-distance control measurements, but also optionally installed built-in Bluetooth module, to achieve Bluetooth wireless communication.
10. With acoustic discharge alarm, the discharge indication is clear, reducing communication .
11. With input misconnected AC380V power supply protection function, protect the rear audio alarm to reduce the damage to the instrument by misoperation, the instrument also has a perfect anti-potential protection function, strong anti-arc resistance.
12. It has the characteristics of dustproof, shockproof, moisture-proof, high measurement accuracy, good stability and repeatability, and easy to carry.
Specifications
1. Output current:Auto、20A、10A、3A、1A、300m A、100mA 、30mA、10mA、 10mA
2. Test Range:
Auto (30mA -20A) 0Ω - 600Ω (3 phase measurement 0.001 Ω - 360Ω).
20A 0Ω – 1.0Ω (3 phase measurement 0.001 Ω–0.6 Ω).
10A 0.001 Ω – 2.0Ω (3 phase measurement 0.002 Ω–1.2Ω).
3A 0.003Ω – 6.0Ω (3 phase measurement 0.006Ω–3.6Ω).
1A 0.01Ω – 20Ω (3 phase measurement 0.02Ω – 12Ω).
300m A 0.03Ω – 60Ω (3 phase measurement 0.06Ω - 36Ω).
100m A 0.1Ω – 200Ω (3 phase measurement 0.2Ω - 120Ω).
30m A 0.5Ω – 600Ω (3 phase measurement 1.0Ω - 360Ω).
10m A 20Ω – 20kΩ (single phase test only).
3. Accuracy: 0.2% ±0. 2μΩ
4. Minimum resolution: 0.1 μΩ
5. Working temperature: -20~ 40 °C
6. Ambient humidity: ≤ 80%RH, no condensation
7. Power supply: AC: AC220V±10%, 50Hz±1Hz
8. Volume: Length 420mm× width 320mm× height 200mm
9. Net weight: 13.8kg
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