The core technical indicators of relay protection tester are the key to evaluating its performance and applicability, mainly including the following aspects:
1. Output accuracy
① AC current output: The accuracy is usually at level 0.2 (such as 0-40A single-phase, 0-120A triple junction), and the allowable working value for a long time is 10A. The maximum output power can reach 450VA (single-phase) or 900VA (triple junction).
② DC current output: accuracy level of 0.5, range of 0- ± 10A/phase or 0- ± 30A (triple), maximum output load voltage of 20V.
③ AC voltage output: accuracy of 0.2 level, phase voltage output of 0-120V, line voltage output of 0-240V, output power of 80VA/100VA.
④ DC voltage output: accuracy of 0.5 level, amplitude range of 0- ± 160V (phase voltage) or 0- ± 320V (line voltage), output power of 70VA/140VA.
2. Frequency range and harmonic output
① Fundamental frequency range: 20-500Hz in standalone mode, expandable to 0-1000Hz in online mode.
② Harmonic frequency: Supports 1-8 harmonics in standalone mode, and can be extended to 1-20 harmonics in online mode.
3. Output capability
① Multi channel output: supports simultaneous output of 6-phase voltage and 6-phase current, meeting complex protection testing requirements.
② High power output: The maximum output of single-phase AC voltage is 130V, 70VA, and the current output can reach up to 180A; the DC voltage output can reach 300V, 130VA.
4. Time measurement accuracy
① Digital Millimeter: Maximum range of 100 hours, resolution of 0.01 milliseconds, accuracy of 0.01% ± 1 word.
5. Measurement and Display
① Instrument accuracy: using four and a half bit A/D conversion, with an accuracy of 0.1% reading ± 1 word.
② Display screen: Equipped with a 640 × 480 dot matrix 8.0-inch high-resolution graphic LCD display screen, the operation interface and test results are fully displayed in Chinese.
6. Switching quantity and interface
① Switching contacts: Provides 8 switching inputs (compatible with null contacts and 0-250V potential contacts) and 4 switching outputs.
② Communication interface: Provides 2 USB ports and 2 RS232 ports for communication with external computers and other devices.
7. Safety and Protection
① Overload protection: Equipped with overload and over range protection functions, the overload protection action current is 120A (AC current) or 2.1A ± 5% (DC voltage).
② Sound and light prompt: Built in sound and light prompt circuit, which emits an alarm sound or light prompt when the tested relay contact is activated.
8. Operation and portability
① Operation mode: Supports standalone operation, can also be connected to a laptop for operation, and provides an external keyboard/mouse port.
② Volume and weight: The volume is 400mm × 300mm × 160mm, with a weight of approximately 18.6Kg, making it easy to carry and use on site.
9. Software functions
① Automated testing: capable of completing large-scale and complex calibration tasks with high automation, such as three-phase differential testing, backup automatic commissioning testing, etc.
② Data management: It can automatically organize and record test results, generate test reports, and support direct storage and transmission on USB drives.
10. Environmental adaptability
① Usage conditions: The ambient temperature is -15-40 ℃, the relative humidity is ≤ 75%, and it is suitable for various harsh environments.
These technical indicators collectively determine the performance and application scope of the relay protection tester, and the selection should be comprehensively considered based on specific testing requirements and application scenarios.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
