product overview

Excessive comprehensive error in electric energy measurement is a common key problem in electric energy measurement. The comprehensive error in electric energy measurement is composed of measurement errors caused by the combined errors of voltage transformers, current transformers, electricity meters, and secondary wire voltage drops of voltage transformers. Among these four errors, the measurement error caused by the voltage drop of the secondary wire of the voltage transformer is often the largest.
The Verification Regulations for Electric Energy Metering Devices (SD109-83) and relevant technical regulations stipulate that errors caused by voltage drop in the secondary circuit of voltage transformers must be accurately, quickly, conveniently, and reliably measured. The ETFH-IV secondary voltage drop and load tester produced by our company meets these conditions.

Product characteristics

1. This ETFH-IV secondary voltage drop and load tester can achieve fully automatic measurement of three-phase three wire, three-phase four wire, and single-phase
2. Using engineering plastic chassis to meet durability and effectively ensure the safety of testers and systems
3. The instrument has an automatic range switching function to ensure testing accuracy
4. The combination of electronic principle circuits and DSP technology ensures good testing stability and strong anti-interference ability
5. After the measurement is completed, various parameters related to load are automatically calculated for customer analysis and testing
6. Adopting a large screen Chinese character LCD display, all operations are prompted by Chinese character menus; The data has power-off storage and browsing functions, and can be connected to a computer to transmit data
7. Powered by a large capacity 7.2V11Ah lithium battery, it does not have any impact on the testing circuit and avoids system protection situations. Simultaneously using without power supply on site
8. The secondary load test uses a clamp type ammeter to sample the current without disconnecting the secondary circuit. It can achieve uninterrupted online measurement. Automatic range switching: During the measurement process, it is possible to switch to different positions according to the different values of the test object, ensuring measurement accuracy and display digits
9. Working hours can last up to 24 hours (maximum)
10. Comes with a lightweight charger for easy measurement, and can be connected to an external charger for measurement when the battery is low
11. The instrument has a small volume and light weight
12. Extremely wide range of secondary operating current/voltage. At a working current of 50mA, it can distinguish resistance and reactance of 1m Ω, and can test the online actual load of S-class current transformers with a secondary rated current of 5A; At a working voltage of 5V, it can distinguish conductivity and electronegativity of 0.001mS
13. The secondary pressure drop and load measuring instrument can store 480 sets of measurement data and can maintain it for ten years after power failure
14. Chinese interface large screen display with RS232 communication interface

Other name

Transformer secondary load tester, transformer secondary load measuring instrument, secondary load tester, secondary load measuring instrument