1. Main Features of DRJB861 Relay Protection Tester:
1. The main and auxiliary AC/DC outputs do not interfere with each other.
2. Comprehensive monitoring of DCV, DCA, ACV, ACA.
3. Equipped with contact closure light and buzzer indication.
4. All digital display, convenient for night use.
5. Aluminum alloy shell, compact and portable.
2. Working Principle of DRJB861 Relay Protection Tester:
1. The working principle and performance are described below.
2. Principle description: The whole machine consists of a main circuit and an auxiliary circuit, with different measurement and control functions.
(1) Main circuit:
LDJB-702 Three-Phase Relay Protection Tester The input AC220V is regulated by the main voltage regulator, then through the isolation transformer (also serving as a current booster), the high voltage output is AC0~250V, and after rectification and filtering, DC0~300V is output. For low voltage and high current, one output is 100A, and the other is 20A. The 20A output has strong load capacity and can run at full load for a long time.
The AC/DC current measurement uses a new type of current sensor with accuracy better than 0.5%. The current sensor samples, and after differential amplification, it is sent to the digital meter for display. The decimal point automatically switches for 100A and 20A.
For voltage measurement, there is a digital meter at the top of the instrument. The output voltage to be monitored can be selected via the monitor selection switch, basically meeting testing requirements.
(2) Auxiliary circuit
AC220V is regulated by the auxiliary voltage regulator to output AC0~250V, and after rectification and filtering, DC0~300V is output (can be monitored via the monitor selection switch). Together with the main circuit, it can complete various relay calibrations that require two circuits (such as reclosing relays). There is also a DC5V output for the internal electric stopwatch and digital meter.
3. Main Technical Specifications of DRJB861 Relay Protection Tester:
1. AC current output accuracy: 0.5 class
Phase current output (RMS): 0~40A
Three-phase parallel current output (RMS): 0~120A
Phase current long-term allowable working value (RMS): 10A
Maximum output power of phase current: 420VA
Maximum output power at maximum three-phase parallel current: 900VA
Allowable working time at maximum three-phase parallel current: 10s
Frequency range (fundamental): 20~1000Hz
Harmonic order: 1~20 times
2. DC current output accuracy: 0.5 class
Current output: 0~±10A / per phase, 0~±30A / three-phase parallel
Maximum output load voltage: 20V
3. AC voltage output accuracy: 0.5 class
Phase voltage output (RMS): 0~120V
Three-phase parallel voltage output (RMS): 0~120V
Maximum output power of phase voltage: 60VA
Maximum output power of three-phase parallel voltage: 180VA
Frequency range (fundamental): 20~1000Hz
Harmonic order: 1~20 times
4. DC voltage output accuracy: 0.5 class
Voltage output: 0~±160V / per phase, 0~±480V / three-phase parallel
Maximum output load current: 0.5A
5. Phase angle: 0~360°
Accuracy: 0.5°
6. Frequency: 20~1000Hz
Accuracy: 0.001Hz
7. Time measurement: 0.1ms~9999.999s
Accuracy: 0.001s
8. Power supply: AC220V±10%, 50Hz
9. Dimensions: 400mm×300mm×200mm
10. Weight: 20kg
11. Ambient temperature: -10°C~+50°C
12. Relative humidity: ≤85%
13. Insulation resistance: ≥10MΩ
14. Dielectric strength: 2kV/1min
15. Protection: Overload, overcurrent, and short circuit protection
16. Display: LCD display
17. Interface: USB, RS232
18. Software: Supporting Windows operating system
19. Accessories: Test leads, power cord, manual, etc.
20. Warranty: 1 year
21. Certification: CE, ISO9001
22. Customization: Available upon request
23. After-sales service: 24-hour online support, free training, and maintenance
24. Packaging: Standard export wooden case
25. Delivery time: 7-15 days
26. Payment terms: T/T, L/C, Western Union, etc.
27. Minimum order quantity: 1 set
28. Supply capacity: 1000 sets per month
29. Port: Shanghai, Ningbo, etc.
30. Contact: For more information, please contact us.
