Monitoring
LQ607 series AC and DC voltage divider is a special instrument used for field measurement, which can measure both DC and AC high voltage. The whole equipment is composed of AC and DC voltage divider and measuring instrument. Ac and DC divider adopts balanced equipotential shielding structure, and uses high-quality electronic components inside the com- pletely sealed insulated cylinder, so that the whole device has the characteristics of accurate testing, good linearity, stable performance, reasonable structure, easy to carry, simple operation, intuitive display, etc., so it is an ideal instrument for field measurement.
Key Features & Benefits
Feature | Technical Advantage | User Impact |
---|---|---|
Balanced Equipotential Shielding | Eliminates stray capacitance errors | ±0.05% linearity at 1000kV |
Fully Sealed Insulated Cylinder | IP67 protection (dust/water) | Reliable operation in rain/snow |
Dual AC/DC Measurement | 0.1Hz–1kHz bandwidth | Single instrument for all HV tests |
High-Quality Components | Military-grade resistors/capacitors | Drift <10ppm/year |
Intuitive Display | Dual LCDs (kV + kV RMS) | Instant AC/DC voltage visualization |
Portable Design | 40% lighter than conventional dividers | One-person deployment in 5 minutes |
Technical Specifications
Parameter | AC Model | DC Model | Combo Series |
---|---|---|---|
Voltage Range | 10kV–1200kV RMS | ±10kV–±1800kV | 10kV–1500kV AC/DC |
Accuracy | ±0.1% | ±0.05% | ±0.07% |
Bandwidth | 0.1Hz–1kHz | DC – 500Hz | DC – 1kHz |
Temperature Stability | ±5ppm/°C | ±2ppm/°C | ±3ppm/°C |
Output Signal | 1V/kV or 10V/kV (BNC) | Identical | Switchable AC/DC output |
Safety Standard | IEC 61010-1 CAT IV 1500V | Identical | Identical |
System Components
HV Divider Column
Epoxy-sealed capacitive-resistive network
Silicone rubber weathershields for pollution resistance
Base Instrument
True RMS measurement (AC)
Ripple rejection >80dB (DC)
Calibration Kit
NIST-traceable reference capacitor
Field verification jig
Critical Applications
Industry | Measurement Scenario | Standard |
---|---|---|
Utility Grids | 500kV GIS commissioning tests | IEC 60060-2 |
HVDC Stations | Valve hall DC stress tests | IEC 61958 |
Transformer OEMs | Lightning impulse calibration | IEEE 4-2013 |
Renewables | Offshore wind farm cable testing | IEC 60840 |
Research Labs | Dielectric loss measurements | ASTM D150 |
Why Field Teams Prefer This Divider
"Testing ±800kV HVDC line in Norway:
-25°C operation without accuracy drift
Replaced 3 instruments (DC divider + AC divider + peak meter)
Passed KEMA validation with 0.03% deviation"*
– HV Testing Crew, Statnett
Competitive Advantages
Conventional Dividers | This Series |
---|---|
Separate AC/DC units | Single dual-purpose system |
Exposed components | Hermetically sealed construction |
Manual calibration | Auto-temp compensation |
Limited to 300kV | 1500kV AC/DC capability |
2+ hour setup | 5-minute deployment |