NXJB-II Single-phase relay protection tester
NXJB-II Single-phase relay protection tester This instrument is a novel device designed for single-phase protection relay calibration in various high-and low-voltage distribution systems.
The NXJB-II Single-Phase Successive Electrical Protection Tester is a state-of-the-art instrument designed for single-phase protection relay calibration in high and low voltage power distribution systems. Its performance specifications and testing methodologies are based on the "Newly Compiled Protection Relay Inspection Manual" compiled by the Safety Supervision and Production Coordination Department of the Ministry of Electric Power Industry. This device is widely applicable to industrial enterprises including power plants, metallurgical facilities, chemical plants, mining operations, and textile mills. It enables comprehensive testing and calibration of various relay types—including electromagnetic, rectifier, and transistor-integrated circuit relays—covering operational voltage/current values, return voltage/current values, action time, return time, as well as reclosing relay parameters such as action values, return values, charge/discharge duration, and action time. Additionally, it supports testing of starting current, sensing element operating current, fast-break element operating current, and action time for GL-type and LL-type time-delay relays.
This instrument integrates essential electrical components for protection relay calibration—including current generators, voltage generators, electricalstopwatch (electrical stopwatch), standard voltage/current meters, and voltage regulators—into a compact portable system. It replaces analog standard voltage/current meters and electrical秒表 with digital models, featuring intuitive readings and user-friendly operation, making it an ideal testing solution for protection relay calibration technicians.
The characteristics of this instrument include: high precision, large power output, compact size, lightweight design, digital display, user-friendly operation, comprehensive functionality, reliable performance, and durability.
I. Main Technical Specifications
1. Output Specifications: Adjustable continuous AC current: 0～5A,0～150A; DC current: 0～500mA, 0～20A; AC voltage: 0～250V (I≤5A,50Hz); DC voltage: 0～300V (I≤5A,50Hz); 0～12V (I≤500mA)
2. Auxiliary Power Supply: Fixed 220V (I≤4A)
3. Electrical Measurement: 4.5-digit voltmeter, 3.5-digit ammeter; Accuracy: 0.5% ROG ±1 digit
4. Time Measurement: 8-digit stopwatch (0～9999.9999S); Accuracy: ±0.0001S
5. Operating Voltage: AC220V ±10% (50Hz)
6. Operating Environment: Temperature: -40℃～+50℃; Humidity: <90% RH
7. Output Power: 1.5KW