Electrical Specifications

Thermal Performance & Operation

• Temperature Rise: <100K after 60-min continuous operation at 100% load

• Structural Integrity: Maintained at operational temperatures

• Cooling Method: ONAN (Oil Natural Air Natural)

• Stabilization Time: 25 minutes to thermal equilibrium

Fault-Tolerant Safety Design

• Non-Destructive Failure: Insulation remains intact during breakdown events

• Controlled Arcing Path: Directed arc channels prevent collateral damage

• Pressure Relief: Rupture disc protects against oil overpressure

• Ground Fault Containment: Localized fault energy dissipation

ONAN Cooling System

Operational Endurance

Continuous Operation: 60 minutes at:

• 1000kV rated voltage

• 1A rated current

• 5kW power dissipation

Safety-Critical Applications

• Nuclear power plant safety systems

• High-voltage circuit breaker testing

• Grid protection relay validation

• Critical infrastructure monitoring

• Lightning impulse testing (IEC 60060-1)

Safety & Reliability Features

• Double-barrier insulation system

• Oil condition monitoring sensors

• Creepage distance: 30mm/kV (30m total)

• Corona-free design up to 1150kV

• IP67-rated enclosure protection

Operational Protocols

1. Pre-operation oil dielectric test (min 60kV/2.5mm gap)

2. Maximum 60-minute continuous operation

3. 120-minute cooldown period between full-load tests

4. Annual dissolved gas analysis (DGA) of oil

Compliance & Certification

• IEC 60273: High-voltage resistors

• IEEE 4-2013: HV testing standards

• EN 60076-14: Liquid-immersed equipment

• IEC 61508: Functional safety requirements

• ASME BPVC Section VIII: Pressure vessel standards