Circuit Breaker (Switch) Test Instrument
LQHV-408 Circuit Breaker Analyzer | 12-Channel HV Switch Tester
The LQHV-408 Circuit Breaker Analyzer is a professional-grade instrument for comprehensive dynamic testing of high-voltage circuit breakers (SF6, vacuum, and oil types). With 12-channel synchronous measurement and integrated power supply, it meets GB1984-2003 and DL/T 846.3-2004 standards for power system reliability.
Technical Parameters
| Time measurement | 12 natural switching (closing) time |
| The opening (closing) phase is not at the same time | |
| The difference between different periods of switching (closing) | |
| Closing (opening) Bouncing time (number of bounces) | |
| Internal trigger test range: 1ms ~ 10000ms, resolution: 0.01ms, | |
| External trigger test range: 1ms ~ 10000ms, | |
| Resolution within 999ms: 0.01ms,1000-9999ms: 0.1ms, and over 10000ms: 1ms | |
| Accuracy within 200ms: 0.05%± 0.1ms | |
| velocity measurement | instant separating (instant closing) velocity |
| Appointed time slot (stroke segment or angle segment) average | |
| velocity | |
| velocity measurement range | 0.1mm sensor 0.01～20.00m/s, |
| 345°angle sensor 1 cycle/ 0.01° | |
| Travel measurement | Travel of moving contact (travel) |
| Contact stroke (open distance) | |
| Over travel | |
| Overshoot or rebound stroke | |
| Measuring range: | linear sensor:50mm, measuring range: 0-50mm, resolution :0.1mm. |
| Optional 100-1000mm linear sensor of any length. | |
| Encoder: 345° Rotate sensor, measurement | |
| range: 0-1000mm, resolution :0.1°. | |
| Current resistance range | the maximum current 20 A, resolution: 0.01 A, 1000 Ω resistance, resolution: 0.01 Ω. |
| Instrument power supply | AC 220V ± 10%; 50 hz plus or minus 10% |
| Dc power output | continuously adjustable DC20 ~ 270V, DC220V≤20A (short time), Power: 4400W. |
| External trigger voltage | AC/DC10-300V, current ≤120A |
| Disconnecting switch measurement range | (1) Voltage output: DC20～270V(adjustable) |
| (2) Current output time: 0.01~10 s (settable) | |
| (3) Fracture signal maximum acquisition time: 10s | |
| (4) Measurable fracture closing, separation time, three-phase a synchronism, bounce time and frequency. | |
| Mainframe volume | 360×260×170mm |
| Operating environmen | -20℃~+50℃ |
| Relative humidity | ≤90% |
Product Overview
Engineered for field technicians, the LQHV-408 delivers:
12-contact analysis - Measures 6 main + 6 auxiliary contacts simultaneously
Versatile power supply - Built-in DC30-250V/20A adjustable source
SCM core sampling - High-precision data acquisition technology
Key Specifications
Measurement Channels: 12 metal contacts (main + auxiliary)
Power Supply: DC30-250V adjustable (20A current)
Display: 7" sunlight-readable color screen
Standards: GB1984-2003, DL/T 846.3-2004
Data Storage: 100 test groups with timestamp
Anti-Interference: Rated for 500KV substations
Premium Features
1. Comprehensive Switch Testing
Single-operation captures:
Time-travel characteristics
Contact bounce analysis
Coil current/resistance
Stroke-speed waveforms
2. Advanced Diagnostics
Special functions include:
Energy storage testing
Automatic/manual low-voltage trip
Circuit breaker life testing
Dual-circuit redundancy (fault-tolerant testing)
3. Field-Optimized Design
User-centric features:
360° rotation sensor (no dead angle)
Adjustable linear sensor (30-1000mm)
Short-circuit protection (1ms response)
High-speed thermal printer
4. Smart Connectivity
Data management options:
USB interface for PC analysis
Optional RS232 online operation
Bilingual support (Chinese/English)
Applications
SF6/GIS combination appliance testing
Vacuum/oil switch maintenance
Railway special circuit breaker analysis
Substation preventive testing
Why Choose the LQHV-408?
Efficiency: 12-channel measurement in one operation
Safety: 500KV-rated anti-interference protection
Versatility: Tests all major switch types worldwide
Note: Includes universal sensor kit - no factory reprogramming needed for sensor changes.
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