NXJB-III Relay Protection Tester
The NXJB-III Relay Protection Tester is a novel instrument designed for single-phase protection relay calibration in various high and low voltage distribution systems.
This instrument is a novel device 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. Suitable for industrial and mining enterprises including power generation, metallurgy, chemical processing, mining, and textile industries, it enables comprehensive testing and calibration of various relay types: electromagnetic, rectifier, and transistor-integrated circuit relays, covering operating voltage/current values, return voltage/current values, action time, return time, as well as reclosing relay parameters including operating 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 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. Featuring dual adjustment, dual output, and dual display capabilities, it replaces analog standard voltage/current meters and electrical秒表 with digital models for enhanced readability and simplified operation, making it an ideal testing solution for protection relay calibration technicians. Key specifications include high precision, high power output, compact size, lightweight design, digital display, user-friendly operation, comprehensive functionality, reliable performance, and durable durability.
I. Main Technical Specifications
1. Main circuit output: Continuously adjustable
AC current: 0～5A,0～100A
DC current: 0～5A,0～30A
AC voltage: 0～250V
DC voltage: 0～350V
2. Auxiliary circuit output: Continuously adjustable
AC current: 0～5A,0～30A
DC current: 0～500mA, 0～10A
AC voltage: 0～250V
DC voltage: 0～350V
3. Power measurement: 4.5-digit voltmeter, 3.5-digit ammeter.
Accuracy: 0.5%ROG ±1 digit
4. Time measurement: 6-digit stopwatch with a range of 0 to 9999.9999 seconds.
Accuracy: ±0.0001 seconds.
5. Operating voltage: AC220V±10%; 50Hz
6. Operating environment: Temperature: -40℃ to +50℃; Humidity: <90% RH
7. Output power: 1.5/0.75 kW