Insulation and Isolation: Provides critical insulation and isolation between the high-voltage primary energized main circuit and the grounding cabinet, as well as between different phases, ensuring maximum operator safety.
Electrical Connection: Serves as a reliable transitional component for electrical connections within the circuit breaker, effectively connecting the busbar and contacts.
Shielding and Support: Helps shield electromagnetic eddy currents, extends creepage distance, and provides robust support for the busbar and contacts.
Materials: Manufactured using advanced Epoxy resin APG pressure gel molding for superior durability.
Insulation Performance: The contacts are designed to withstand 42kV/5 minutes of power frequency and 75kV (peak) lightning impulse to ground. The end temperature rise during long-term operation at rated current is maintained at ≤65°C.
Shielding Design: Equipped with aluminum alloy or stainless steel liners to block magnetic circuits, complemented by staggered skirts and a semiconductor coating to eliminate eddy current effects and increase creepage distance.
Optimized Design: Integrated interlocking devices and optimized heat dissipation structures improve overall safety and installation efficiency.
Altitude: ≤1000m
Ambient Temperature: -10°C to +40°C
Relative Humidity: Not exceeding 95% at +20°C ambient temperature.
Environment: No gas, vapor, or dust that may severely affect insulation; free from explosive or corrosive substances.
Integral to 6-12kV handcart-type high-voltage switchgear in indoor distribution systems.
Widely used in substations, distribution rooms, and power control centers for industrial and commercial facilities.
Essential for renewable energy facilities like solar and wind power plants for reliable energy transmission.
Applied in critical infrastructure including railways, airports, and data centers.
Compatible with medium-voltage switchgear upgrades to enhance insulation in aging systems.
Frequently Asked Questions
What materials are used in the construction of the contact box?
The contact box is manufactured using high-quality Epoxy resin through the APG (Automatic Pressure Gelation) molding process, ensuring excellent insulation and mechanical strength.
What are the voltage withstand capabilities of this equipment?
It is designed to withstand a power frequency of 42kV for 5 minutes and a lightning impulse (peak) of 75kV to ground.
What is the maximum operating altitude for this product?
The standard operation condition for this contact box is an altitude of ≤1000 meters.
How does the design prevent electromagnetic eddy currents?
The design incorporates aluminum alloy or stainless steel liners to block magnetic circuits and semiconductor coatings to effectively eliminate eddy current effects.
What is the allowable temperature rise during operation?
During long-term operation at the rated current, the temperature rise at the ends is engineered to be ≤65°C.
In what environments should this contact box be installed?
It should be installed in indoor environments with temperatures between -10°C and +40°C, and a relative humidity of ≤95%, free from corrosive or explosive gases.
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