What are the other names for secondary load testers?

Secondary load tester alias: secondary load tester, transformer secondary load tester, secondary load measuring instrument, transformer secondary load measuring instrument

Product features: 1. Three-phase three-wire, three-phase four-wire, single-phase automatic measurement can be realized.

2. Use engineering plastic chassis to get acquainted with durability and effectively ensure the safety of testers and systems.

3. The instrument has the function of automatic range switching to ensure the accuracy of the test.

4. The use of electronic principle circuit combined with DSP technology is to make the test stable and anti-interference ability.

5. After the measurement is completed, the parameters related to the load are automatically calculated, which is convenient for customers to analyze and test.

6. Large-screen Chinese character LCD display, all operations are prompted by Chinese character menu; The data has the functions of power-off storage and browsing, and can be connected to the computer to transmit data.

7. Large-capacity lithium battery is used for power supply, which does not have any impact on the test circuit and avoids the protection of the system. At the same time, it can be used in the absence of a power supply in the field.

During the measurement process, it can be switched to different positions according to the different values of the test object, so that the measurement accuracy and the number of display digits can be guaranteed.

9. The working time can be as long as 24 hours (the longest), which can be measured in the state of charging.

10. Comes with a lightweight charger, which is convenient for measurement, and can be measured by an external charger when the battery is insufficient.

11. The instrument is small in size and light in weight.

12. Extremely wide secondary working current voltage range. Under the working current of 50mA, it can distinguish the resistance and reactance of 1m, and can test the actual load of the S-class current transformer with a secondary rated current of 5A; At an operating voltage of 5V, the conductance and acceptance can be distinguished.

13. It can store 480 sets of measurement data, and it can be maintained for ten years after power failure.

14. Large screen display of Chinese interface, with RS232 communication interface.

Brief introduction. The comprehensive error of electric energy metering is a key problem that is common in electric energy metering, and the comprehensive error of electric energy metering is composed of the synthesis error of the voltage transformer, the synthesis error of the current transformer, the error of the watt-hour meter, and the measurement error caused by the voltage drop of the secondary conductor of the voltage transformer. Among these four errors, the measurement error caused by the voltage drop of the secondary conductor of the voltage transformer is often the largest.

The verification regulations for electric energy metering devices "SD109 83" and relevant technical regulations have provisions on the errors caused by the voltage drop of the secondary circuit of the voltage transformer, which must be measured accurately, quickly, conveniently and reliably.

Due to the continuous improvement of science and technology, the secondary load tester used today has played an important role in practical applications, the system uses digital measurement methods to measure alternating current parameters, using digital filtering and DSP technology as the core to ensure the measurement accuracy of the system, the instrument is very convenient for users to test and use, in the power line, the current range can range from a few amperes to tens of amperes, and the voltage range can range from a few volts to millions of volts, due to the direct measurement is very dangerous, As a result, the current and voltage on the line are relatively high, and the secondary load** tester plays an important role in use.

In the use of the secondary load tester, the display equipment is mostly a pointer-type current and voltmeter, so the secondary current of the current transformer is mostly amperes, over time, most of the electrical measurements have been digitized, the signal sampled from the computer is usually milliampere 0-5v, 4-20mA, etc., the secondary current of the small current transformer is milliampere, as a bridge between the large transformer and sampling, the small current transformer is called the measurement current transformer, the general current transformer structural principle, The structure of the current transformer is relatively simple, the rated current of the current transformer is less than the current of the current transformer, and the secondary winding is close to the short-circuit state corresponding to the short-circuit transformer, so it has been well applied.

Because the secondary load tester can be used to effectively detect the correct voltage, because the error of the current and voltage transformer is an important factor affecting the accuracy of energy measurement, the actual calibration of the transformer must be turned off the equipment, it affects the power consumption and power consumption of the enterprise, according to theory and experiment, the size of the secondary load of the transformer has a great impact on the error of the transformer, so the secondary load test, can not correctly monitor the error of the transformer according to the test results, can better understand the actual situation of the transformer operation.

Respondent: Huatian Power.

Secondary load test, using clamp meter to sample current, no need to disconnect the secondary circuit.

Automatic switching range bending and closing: During the measurement process, it can be switched to different positions according to the different values of the test object, so that the measurement accuracy and the number of display digits are guaranteed.

The measurement accuracy is high, the range is wide, and the lower limit is low, which can test the load below 10VA of the voltage mutual sensing device.

The instrument can measure the frequency of the power supply, temperature and humidity, so that the user can know the working environment in the field at any time.

Technical Indicators. Environmental conditions Temperature: 5°C 40°C Relative humidity: <95% (25°C).

Altitude: <2500m

External interference: no strong vibration, no strong electromagnetic field.

The main technical indicators of the instrument during the secondary load test.

PT Secondary Load Test Admittance Measurement Range:

Voltmeter: CT Secondary Load Measurement Impedance Measurement Range:

Ammeter: Measurement accuracy: dx= (1% x+1% y 2 words) buried dy= (1% x+1% y 2 words) 2 words - the quantization error of the instrument.

Product Overview.

EDYF-II secondary voltage drop and load tester has the functions of voltage transformer secondary circuit voltage drop test and transformer secondary load at the same time, which is convenient for on-site verification of metering devices.

Features: The lithium battery with high power inside is used as the working power supply of the instrument, and the pure power supply brings more stable and accurate measurement data, and at the same time facilitates the on-site verification work.

Using 640 480 high-resolution large-screen LCD display, with humanized interface and operation design, using touch screen to assist operation, making the operation more convenient and fast.

The accuracy of the measurement data is further improved by the use of precise software algorithms.

It can intelligently judge the status of external wiring, and prompt wiring errors, conversion ratios, polarity errors, etc.

Automatically round the test data and determine whether it is out of tolerance.

Directly issue on-site verification conclusions, qualified or unqualified.

The mass storage can store up to 1000 pieces of field test data. The engineering plastic mold chassis is shockproof and pressure-proof to ensure the safety of on-site operators and equipment.

Advanced computer management software.

Technical Indicators. General technical indicators of the whole machine.

Accuracy: Level 1.

Operating voltage, operating current, dial gauge accuracy: Class 1.

Operating voltage range: 5V 120V

Operating current range: 50mA 6A i.e. (5A: 1% 120%)

vMeasurement range: voltage drop) or impedance).

iMeasuring range: 5UA 6A

Clamp meter current measurement range: 10 mA 6A

Frequency differential range: 40 Hz 60 Hz Resolution: Hz

Secondary pressure drop test.

Measuring range: f:

Operating voltage range: 50V 150V

Secondary load test.

Impedance Measurement Range:

Admittance Measurement Range:

Operating voltage range: 50V 150V