AC DC Divider
LQHVF/AC-DC 250KV Dual-Purpose Voltage Divider
100pF Capacitive & 600MΩ Resistive Measurement System with ONAN Cooling
Key Advantages
AC/DC Dual Mode - 2000:1 AC & 2500:1 DC division ratios
ONAN Cooling Technology - Oil Natural Air Natural thermal management
Peak Voltmeter Integration - 100V output to PV2-1 instruments
Ultra-Stable Performance - Temperature coefficient <0.0005
285KV Test Proven - Exceeds rated voltage by 14%
Technical Specifications
| Parameter | AC Mode | DC Mode |
|---|---|---|
| Rated Voltage | 250kV | |
| Frequency | 50/60Hz | N/A |
| Dividing Ratio | 2000:1 | 2500:1 |
| Capacitance | 100pF | N/A |
| Resistance | N/A | 600MΩ |
| Output Voltage | 100V (to PV2-1 peak voltmeter) | |
| Accuracy | ≤±1.5% | |
| Dielectric Loss | <0.5% | N/A |
| Max Test Voltage | 285kV | |
| Operating Time | 30 min @100% load | |
| Cooling | ONAN | |
| Dimensions | Ø150/Ø600 × 1600mm | |
| Weight | <65kg | |
Dual-Mode Measurement System
AC Measurement Mode
2000:1 voltage division ratio
100pF capacitive coupling
50/60Hz frequency compatibility
Dielectric loss <0.5%
DC Measurement Mode
2500:1 voltage division ratio
600MΩ resistive load
Ultra-low temperature drift (<0.0005)
No frequency dependence
Peak Voltmeter Integration
Directly interfaces with PV2-1 instruments:
Standard 100V output signal
Calibrated measurement path
No external attenuation needed
Note: Peak voltmeter not included
ONAN Cooling Advantage
Oil Natural Air Natural technology ensures:
Continuous 250kV operation for 30 minutes
Stable dielectric properties under load
No active components required
Applications
Factory Acceptance Testing
Verify HV equipment at 285kV test voltage
Research Laboratories
Precision AC/DC comparative measurements
Field Diagnostics
Portable 65kg design for on-site testing
Compliance & Safety
Meets international standards:
IEC 60060-1 (HV test techniques)
IEC 61010 (Electrical safety requirements)
IEEE 4 (Standard for HV testing)
Safety Margin: Withstands 285kV (14% above rated voltage)
Operational Guidelines
Max continuous operation: 30 minutes at 250kV
Cooling recovery period: Equal to operation time
Annual dielectric oil analysis
Biannual ratio verification
