High-Voltage Switch Running-in & Life Test System

The MOEORW-WKQ62 High-Voltage Switch Running-in & Life Test System (also known in the industry as a high-voltage switch running-in bench, circuit breaker running-in tester, switch life test stand, or circuit breaker operating test device) is a dedicated testing instrument designed for factory aging and life verification of high-voltage circuit breakers, load switches, and permanent magnetic switches. The system adopts an industrial-grade industrial computer architecture combined with multi-threaded time-sharing control algorithms, enabling fully automatic running-in operations for switches with multiple voltage ratings including AC110V, AC220V, DC24V, DC48V, DC110V, and DC220V. Compared with traditional time-relay based running-in devices, this system thoroughly resolves persistent industry issues such as coil burnout, voltage sag, and untraceable parameters. It has now become the standard testing tool for multiple leading circuit breaker manufacturers and electric power material acceptance units across the country.

1. High-Precision Wide-Range Operating Power Supply – Eliminating False Rejection at Low Voltage
The system incorporates a self-developed high-power DC precision operating power supply. Unlike conventional transformer-rectifier type power supplies, this unit employs a two-stage architecture combining switch-mode power supply with linear voltage regulation, achieving voltage sag of less than 0.5V under coil loading and a peak instantaneous current output capability of up to 40A (at DC24V/48V range). The significance of this specification lies in the national standard requirement that circuit breakers must reliably operate at 65% of rated voltage; ordinary power supplies with insufficient low-voltage high-current output frequently cause qualified breakers to be falsely rejected as "low-voltage refusal to operate." The power supply delivers 0.1V voltage resolution and better than 0.1% rdg ±0.5V accuracy across the full DC5-270V range, ensuring both authenticity and repeatability of 65% low-voltage impact tests, effectively reducing false rejection rates on production lines.
 

2. Millisecond-Level Coil De-energization Protection – Reducing Coil Burnout Rate by Over 86%
Coil burnout during opening/closing operations is the most frequent quality incident in circuit breaker running-in processes. The root cause is that when a circuit breaker fails to operate or the auxiliary switch fails to transfer, the operating power supply continuously energizes the coil, causing overheating and permanent damage within tens of seconds. This device incorporates dual-channel protection in its control logic: independent hardware timers and software-based timeout protection. After each close or open command is issued, the system automatically cuts off the operating power according to the user-preset timing value (recommended 100-200ms). Even if the circuit breaker completely fails to respond, the coil energization time is strictly confined within the preset value, not exceeding 200ms. The timing value is adjustable from 1 to 60000ms with 1ms resolution and ±1ms accuracy. Actual production line data demonstrates that after implementing this protection mechanism, annual coil consumption per production line can be reduced from approximately 90 units to fewer than 12 units, representing a reduction exceeding 86%.
 

3. Real-Time Contact Status Monitoring and Fault Self-Locking – Preventing Fault Escalation
For each circuit breaker under test, the open/close status of its three main poles (A, B, C phases) is independently connected to the system through dedicated contact detection circuits. The front panel features three sets of red/green LED indicators providing real-time visual status monitoring. The running-in software simultaneously acquires contact status signals in real time. When any of four fault types occurs - refusal to open (contacts remain closed after an open command), refusal to close (contacts remain open after a close command), false opening (contacts open without command), or false closing (contacts close without command) - the system identifies the fault within 20ms and executes three simultaneous actions: a red fault alert appears on the host software interface, an audible-visual alarm emits buzzer and flashing signals, and the main circuit contactor immediately cuts off all operating power. This self-locking mechanism prevents a single circuit breaker fault from affecting other test stations, ensuring safety across the entire running-in area.
 

4. Predefined Parameter Library and One-Click Recall – Reducing Changeover Time from 20 Minutes to Under 30 Seconds
To accommodate the multi-variety, small-batch production characteristics of circuit breaker manufacturers, the device software incorporates a "Predefined Data" function module. Users can save and store complete operating sequences - including closing time, opening time, currentless interval time, charging time, and post-charging rest delay - for different circuit breaker models such as ZW32, ZW20, VS1, ZN63, and LW36, with up to 15 programmable steps per sequence, and assign custom names to each saved profile. When the same model returns to production, operators simply select the predefined profile from the drop-down menu and click "Run" to initiate fully automatic running-in without re-entering any timing parameters. This feature is particularly advantageous for factories that switch product lines multiple times per day, compressing single changeover setup time from the original 15-20 minutes to under 30 seconds
 

5. Long-Life Test Capability and Complete Data Traceability System – Meeting ISO and Utility Audit Requirements
The single-station running-in cycle count can be set arbitrarily from 1 to 100,000 operations, meeting the mechanical life type-test requirements for all categories of circuit breakers. Throughout the running-in process, all data - including operating times, fault types, and cycle counts - is automatically stored in the local database, supporting multi-dimensional search queries by date, operator, and switch serial number. Upon completion of the running-in task, the system displays a "Task Complete" prompt and automatically cuts off the output power. Operators can right-click on any historical record to generate a Word-format running-in test report with one click. The report includes complete information such as test conditions, operating sequences, individual operating times, and fault logs, and supports secondary editing and printing. This functionality is especially critical for manufacturers that require ISO quality system certification or must provide factory test reports to utility customers.

Scenario 1: Complete Circuit Breaker Aging and Running-in Workshop at Manufacturing Facilities.

This is the primary application environment for this equipment. After final assembly, the operating mechanism's linkages, pins, seals, and other components contain assembly stresses. Direct shipment without running-in would result in excessive operating torque or jamming on site. By performing 200-500 no-load open/close operations through this running-in bench, all kinematic pairs achieve adequate running-in, friction coefficients stabilize, and early-stage failures are eliminated. Practical applications demonstrate that on-site first operating torque after running-in can be reduced by approximately 22%-28%, and mechanical failure rates within one year of commissioning decrease significantly. The multi-station parallel design allows a single unit to simultaneously drive multiple circuit breakers through running-in cycles, with the only consideration being that energy storage power for additional circuit breakers must be externally supplied (the internal storage power supply supports only one unit), effectively improving workshop floor space utilization.

Scenario 2: Electric Power Material Quality Inspection and Delivery Acceptance Departments.

Provincial power company material testing centers, electric power research institutes, and similar organizations must perform batch sampling running-in life verification upon circuit breaker delivery to determine whether the batch meets bidding technical specifications. This tester offers standardized operating procedures and automatic report generation, with the entire testing process controlled by the industrial computer program, eliminating human operational variability and ensuring test result repeatability. The generated Word reports can be directly archived as acceptance evidence, meeting the stringent State Grid and China Southern Power Grid requirements for digitized and traceable test data. The compact dimensions (1000×900×1400mm) and bottom caster design facilitate convenient movement between laboratories and temporary testing sites.

Scenario 3: Performance Re-testing After Circuit Breaker Repair and Remanufacturing.

For scenarios involving return-to-factory repair or on-site overhaul of decommissioned power system circuit breakers, running-in testing is mandatory after repair completion to verify mechanism restoration quality. Repaired circuit breakers often exhibit changes in component fit clearances and new spring stiffness variations. By configuring 100-300 open/close cycles on the switch life test stand, operators can effectively verify operating mechanism compatibility while exposing potential defects such as slow opening/closing and excessive bounce. The equipment's dual AC/DC output power supply (AC range AC0-250V, DC range DC5-270V) enables coverage of voltage classes from 10kV distribution switches to 220kV high-voltage circuit breakers.

Scenario 4: Type Testing of Switch Components and Product R&D Verification.

Circuit breaker R&D departments must conduct mechanical life type tests before finalizing new product designs, typically requiring 10,000 or more consecutive operations. This circuit breaker operating test device can run continuously and unattended over extended periods. If any single fault occurs during the running-in process, the system automatically stops and records the fault type and accumulated cycle count at the time of occurrence, enabling R&D personnel to identify weak points and implement targeted improvements. Additionally, the device's high-precision timing capability (open/close time measurement accuracy of ±1ms) can assist in measuring inherent open/close timing characteristics under different operating voltages, serving dual purposes with a single instrument.

Power cord×1, RS232 serial cable (cross-wired)×1, USB keyboard & mouse set×1, PC adapter×1, alarm wire (DC12V)×1, contact detection test leads (3 sets, 6-core)×1, open/close control output cable (4-core shielded)×1, grounding wire×1, factory calibration certificate×1, user manual & operation guide (USB drive)×1, warranty card×1.