High-Voltage Circuit Breaker Dynamic Characteristic Tester Calibration Device

MOEORW-W5210 product is a standard-source-level device dedicated to the periodic verification and performance validation of high-voltage circuit breaker dynamic characteristic testers. It is commonly referred to in the industry as a switch characteristic tester calibration bench or high-voltage switch dynamic characteristic tester verification device. The unit incorporates an ARM embedded processor combined with a CPLD hardware programmable logic device to form a dual-core timing platform, with its output time base signal directly traceable to a 24M high-stability crystal oscillator, fundamentally eliminating random errors and interrupt response delays inherent in pure software timing. As a circuit breaker tester calibrator, the MOEORW-5210 can simultaneously simulate the closing/opening actions of 12 main contacts of high-voltage circuit breakers, covering a full-scale time setting range from 0.001ms to 20000.000ms, with a resolution of 1μs and accuracy of ±(0.001% of reading + 5μs). This performance has been validated through type evaluation tests conducted by the National Institute of Metrology of China, fully complying with all technical requirements for standard devices specified in JJG(Mechanical)140-1993 "Verification Regulation of High-Voltage Switch Mechanical Characteristic Testers". It can serve as a direct replacement for imported equivalent calibration equipment in provincial/municipal electric power research institutes and high-voltage apparatus quality inspection centers for value transmission purposes.

The MOEORW-5210 internally comprises five major functional modules: trigger input conditioning, high-speed presettable counter, high-stability crystal oscillator, ARM-based human-machine interface, and CPLD precision output control. Unlike products on the market that use microcontroller timers to toggle I/O pins, the timing output of this device is driven entirely by CPLD hardware logic circuits directly controlling the break contact electronic switches, independent of program interrupt response time. Consequently, there are no random delay jitters caused by keypad scanning or LCD refresh cycles. Each time a calibration is initiated, the time base uses the 24M crystal oscillator as its reference source, which is frequency-multiplied via the CPLD's internal phase-locked loop to an operating frequency of 200MHz, achieving a minimum time step controlled at the 5ns level-resulting in output accuracy improved by an order of magnitude over conventional solutions.

Furthermore, this high-voltage switch dynamic characteristic tester verification device incorporates built-in contact state retention and reverse-logic output functionality: when set for closing calibration (initial contact state is open), the output is active on the falling edge; when set for opening calibration (initial contact state is closed), the output is active on the rising edge. This design strictly follows the actual electrical characteristics of circuit breaker operations, preventing missed triggers or false triggering of the tester under calibration caused by edge-direction mismatches. It is particularly well-suited for verifying special switch testers equipped with closing resistor pre-insertion features.

Scenario 1: Provincial Electric Power Research Institutes / Metrology Centers - Value Transmission & Mandatory Verification
Electric power research institutes at various levels are required to perform periodic verification on dozens to over a hundred high-voltage switch testers in use by power supply companies and power plants within their jurisdictions each year. The MOEORW-5210 serves as the highest-level metrology standard device, conducting full-parameter calibration of closing time, opening time, non-synchronization, and bounce count in accordance with JJG(Mechanical)140-1993. Its 12-channel synchronized output capability allows all channels of the tester under test to be connected in a single setup, compressing the traditional per-channel sequential testing time from 40 minutes down to 5 minutes, significantly improving equipment turnover efficiency during verification windows.

Scenario 2: High-Voltage Circuit Breaker Manufacturers - Factory Acceptance & Type Testing
On circuit breaker final assembly lines, each finished product must undergo mechanical characteristic testing using a high-voltage switch tester before leaving the factory. The accuracy of the tester itself, however, requires daily pre-shift spot checks using a circuit breaker tester calibrator. The MOEORW-5210 offers preset standard time templates (e.g., closing 150ms, bounce 3 counts, non-synchronization 1.5ms), enabling one-touch recall to quickly verify whether the tester remains within tolerance, preventing batch-level misjudgments caused by tester drift and effectively reducing quality incident risks.

Scenario 3: Third-Party Power Testing Institutions (CMA/CNAS Laboratories) - Issuing Calibration Certificates
For third-party laboratories undertaking commissioned calibration services, this switch mechanical characteristic tester verification device serves as a supporting standard instrument, providing uncertainty evaluation data traceable to national benchmarks in issued calibration reports. Its active/passive dual-mode trigger interface enables calibration personnel to complete all wiring without disassembling the tester's enclosure, making it particularly suitable for on-site calibration services (such as temporary verification in substation maintenance bays).

Scenario 4: Large Industrial & Mining Enterprises / Rail Transit Power Supply Workshops - Internal Metrology Assurance
End users such as steel mills, chemical plants, and metro systems that operate their own 110kV substations often possess multiple high-voltage switch testers of various brands. This high-voltage switch time characteristic calibrator can serve as an internal check standard within the enterprise metrology room, performing monthly simple deviation comparisons on testers used in the field, enabling timely detection of measurement anomalies caused by battery undervoltage, sensor aging, or software faults, thereby ensuring that switch data obtained during scheduled outage maintenance is authentic and reliable.

The front panel of this device provides 12 pairs of red/black binding posts corresponding to the 12 break contact channels, along with independent active input trigger terminals (accepting DC 10～250V trigger voltage from the tester under test), active output trigger terminals (providing DC 110V drive voltage from this unit), and passive trigger terminals (for self-calibration using a universal counter).

Two primary operating modes:

Mode A (External Trigger) : The tester under test provides the operating power supply, and the verification device waits for its trigger signal. In this mode, the MOEORW-5210 acts as a passive response device, simulating the time-sequence return of circuit breaker auxiliary contacts.

Mode B (Internal Trigger) : The verification device actively outputs a trigger signal to drive the tester under test. In this mode, the MOEORW-5210 completely replaces the tester's internal timing generator, used to independently verify whether the tester's data acquisition and waveform plotting functions are operating correctly.

The operator simply selects the corresponding trigger mode based on the brand and model of the tester under test, sets the desired time values and bounce parameters for each of the 12 channels, moves the cursor to "Start Calibration" and presses the confirm key-after which the entire standard time sequence is automatically output by the CPLD hardware. The right side of the screen displays real-time logic states (open/close transitions) for each channel, with a buzzer sounding simultaneously to indicate action occurrence. The entire calibration process involves no software timing maneuvers, ensuring that every output strictly equals the panel-set values.