Circuit Breaker (Switch) Test Instrument
LQHV-412 Circuit Breaker Analyzer | SF6/Vacuum/Oil Switch Tester
The LQHV-412 Circuit Breaker Analyzer is an advanced diagnostic tool for mechanical characteristic testing of high-voltage circuit breakers (SF6, vacuum, and oil types). With 12-contact synchronous measurement and industrial-grade computing power, it complies with GB1984-2014 and DL/T 846.3-2017 standards for power system safety.
Technical Parameters
| Time measurement | 12 channels inherent opening (closing) time |
| Different periods in the opening (closing) phase | |
| The difference between opening (closing) phases in different periods | |
| Closing (opening) bounce time (bounce times) | |
| Different period test range: 01ms～99ms, resolution: 0.01ms; | |
| Internal trigger test range: 1ms～999ms, resolution: 0.01ms, | |
| 1000ms～9999ms, resolution: 0.1ms, 10000ms～200000ms resolution: 1ms. | |
| External trigger test range: 0.01ms～200s | |
| Accuracy rate within 1000ms: 0.05%±0.1ms | |
| Closing resistance measurement | 3/6 natural opening (closing) time |
| Different phases in the opening (closing) phase | |
| Switching (closing) phase is different | |
| Closing resistance input time, resistance value | |
| Measuring range | 30 ~ 10KΩ, resolution 0.1Ω, accuracy: ≤1%±2 words |
| Dynamic resistance measurement | current output 200A, measurement range: 0-50m Ω, accuracy: ≤ 0.5% ± 0.5u Ω. |
| Speed measurement | just opening (just closing) speed |
| Average speed in a specified time period (stroke period or angle period) | |
| Speed measurement range | 0.1mm sensor 0.01 ~ 25.00m/s, Accuracy rate：0.05%±0.1ms |
| 345° Angle sensor 0.01 ~ 25.00m/s,Accuracy rate：0.05%±0.1ms | |
| Laser sensor 0.01 ~ 15.00m/s. (optional) | |
| Stroke measurement | moving contact stroke (stroke) (optional for 3-way stroke measurement) |
| Contact stroke (open distance) | |
| Overtravel | |
| Overshoot stroke or rebound stroke | |
| Measuring range | linear sensor: 50mm, measuring range: 0-50mm, resolution: 0.1mm. |
| Rotation sensor: 345°, measuring range: 0-1000mm, resolution: 0.08°. This sensor has an invalid area of 15 degrees, and the effective area of the sensor can be seen on the instrument when it is installed, and the value display is preferably about 160-200 degrees. | |
| Acceleration sensor measuring range: 0-300mm, resolution: 0.1mm. | |
| Accuracy rate：土(1%L+0.2)mm | |
| Coil current | maximum current 20A, resolution: 0.01A. Accuracy rate：土5% |
| Measuring range of coil resistance | 0～2000Ω, resolution: 0.01Ω.Accuracy rate：土5% |
| Instrument power supply | AC220V ± 10%; 50Hz ± 10% |
| DC power output | DC6～270V continuously adjustable, DC24V≤15A (short time), DC220V≤20A (short time). |
| External trigger voltage | AC/DC10-300V, current ≤120A |
| Isolating switch measurement range | (1) Voltage output: DC6～270V (adjustable); |
| (2) Power output time: 0.01-20 seconds (can be set); | |
| (3) the maximum collection time of fracture signal is 200 seconds; | |
| (4) measurable fracture closing time, opening time, three-phase different period, bounce time and frequency. | |
| Host volume | 400×380×285mm |
| Use environment | -20℃~+50℃ |
| Relative humidity | ≤90% |
Product Overview
Designed for modern power grids, the LQHV-412 solves critical testing challenges:
Universal compatibility - Tests all switch types (SF6, GIS, vacuum, oil)
Single-operation analysis - Captures all data and graphics in one action
Embedded industrial PC - Cortex-A8 processor with 9" touchscreen
Key Specifications
Measurement Channels: 12 contacts (6 main + 6 auxiliary)
Processor: 1GHz Cortex-A8 with 1GB RAM
Power Supply: Built-in DC6-270V/20A adjustable source
Standards: GB1984-2014, DL/T 846.3-2017
Display: 9" color LCD with Windows OS
Data Storage: 30,000 tests (expandable via memory card)
Premium Features
1. Comprehensive Switch Testing
Supports all switch types (SF6, vacuum, oil) with optional laser sensors for precise motion tracking.
2. Advanced Data Capture
Single-operation testing captures:
Time-travel characteristics
Contact timing sequences
Vibration frequency analysis
Envelope curve generation
3. Industrial-Grade Hardware
Features include:
500KV+ anti-interference capability
Military-grade connectors
High-speed thermal printer
4. Smart Connectivity
Dual USB ports + RS232/WiFi (optional) for:
Mouse/keyboard operation
Direct data export to USB
Remote PC analysis
Applications
Preventive maintenance of HV circuit breakers
Factory acceptance testing (FAT)
SF6/GIS equipment diagnostics
Switchgear commissioning
Why Choose the LQHV-412?
Regulatory Compliance: Meets latest GB and DL/T standards
Future-Proof Design: Expandable memory and wireless options
Time Efficiency: Complete analysis in one operation
Note: Includes universal sensor kit - laser sensors available as optional accessories.
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