DC Charging Apparatus
LQHCA 75kV/300mA DC Charging Apparatus for 150kV Stage Impulse Generators
Product Overview
The LQHCA 75kV/300mA DC Charging Apparatus is a precision high-voltage power supply designed specifically for charging 150kV per stage impulse generator (IG) systems. Engineered for reliability and accuracy, this base-mounted unit delivers symmetrical positive-negative DC voltage through specialized high-voltage lead wires to the generator's primary charging resistor.
Technical Specifications
Voltage Characteristics
Maximum charging voltage: 75kV DC
Control range: 15-100% of maximum (11.25kV-75kV)
Voltage deviation: <±1% from reference
Voltage instability: <±0.5%
Adjusting accuracy: 1%
Voltage resolution: ≤1.0%
Current Characteristics
Maximum charging current: 300mA
Operating range: 20-300mA
Transformer System
Type: Oil-immersed transformer
Rectifier stack: 2DL-300kV/500mA
Secondary voltage: 75kV
Rated capacity: 25kVA
Rated voltage: 75kV/220V
Rectifier Specifications
Reverse voltage: ≥300kV
Average current: ≥0.5A
Measurement & Control
DC Resistance Divider: 100kV 200MΩ (2 units)
Polarity control: Remote electrical switching
Charging method: Bilateral asymmetric circuit
Regulation: Controllable silicon constant current
Power Requirements
Input voltage: 220V, 50Hz (standard)
Optional: 50Hz or 60Hz configurations
Advanced Control Features
Precision Voltage Regulation
Automatically maintains charging voltage within ±0.5% of setpoint across the entire 15-100% operating range, ensuring consistent generator performance.
Remote Polarity Control
Electrical polarity reversal capability allows for flexible testing configurations without physical reconnection.
Constant Current Charging
Controllable silicon regulation maintains precise current flow during the charging cycle for optimal generator performance.
Typical Applications
150kV stage impulse generator systems
High-voltage component testing
Insulation material evaluation
Lightning surge testing
Research and development laboratories
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