>800kV Range

LQHVF 1250kV/500pF Capacitor Voltage Divider - Precision HV Measurement & ONAN-Cooled PD Testing

High-accuracy 1250kV/500pF capacitor voltage divider with ONAN cooling and <5pC PD levels. Features 4000:1 ratio, removable design, and 1375kV insulation for critical HV testing applications.

US$ 21,689.00
Lead time: 45 days

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Product Details

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LQHVF 1250kV/500pF Capacitor Voltage Divider: Advanced ONAN-Cooled Design

Engineered for precision high-voltage measurement with industry-leading thermal management and PD performance

Technical Specifications

Parameter	Specification
Rated Voltage	1250kV AC
Nominal Capacitance	500pF ±5%
Voltage Ratio	4000:1
Frequency	50Hz
Dielectric Loss (tanδ)	<0.2% @ 20°C
Cooling System	ONAN (Oil Natural Air Natural)
Temperature Coefficient	5 × 10^-5 %/°C
PD Level	<5pC @ 1250kV <3pC @ 1000kV (80% rated)
Insulation Level	1375kV/1 min
Accuracy	≤±1%
Continuous Operation	60 mins @ 100% rated voltage

Breakthrough Engineering Features

◉ ONAN Cooling Technology

Passive thermal management system:

• Natural oil convection + air cooling

• Maintains dielectric stability during 60-min operations

• Eliminates need for forced cooling systems

◉ Ultra-Low PD Performance

Industry-leading partial discharge levels:

• <5pC at full 1250kV rating

• <3pC at 1000kV (transformer-verified)

• Exceeds IEC 60270 Class I requirements

◉ Modular Removable Design

Field-configurable components:

• Interchangeable corona rings

• Detachable HV/LV arms

• Removable base for transformer integration

• 50% faster deployment than fixed units

Structural Advantages

Optimized Oil-Immersed Construction

Dielectric fluid: Premium insulating oil (IEC 60296)
Hermetic sealing prevents moisture ingress
Corona shield design minimizes surface discharges

Thermal Stability System

Low TCR dielectric materials (5×10^-5%/°C)
ONAN cooling maintains oil temp ≤50°C @ full load
Homogeneous media prevents thermal stratification

"ONAN-cooled HV dividers demonstrate 40% lower thermal drift than forced-cooled systems in ambient temperatures above 35°C." - Journal of High Voltage Engineering