40.5kV Solid Insulated Switchgear

This shielded solid insulated switchgear is used in power supply systems with a rated voltage of 35 kV, AC 50 Hz, and for terminal power supply. It complies with IEC 298 and is used in power grids, factory distribution, high voltage transmission, railways, urban power distribution and wind power generation.

Product Advantages

Solid Insulation
A shielding layer of conductive material keeps the whole surface at earth potential, so it is safe if touched accidentally. The entire circuit is insulated with epoxy and silicone rubber, leaving no live parts in free air. As a result it is less affected by dirt, humidity and pollution, and needs less maintenance. Each phase is self-contained in a single epoxy block, which greatly reduces phase-to-phase discharge and the risk of internal arc faults.

Modular architecture
The modular architecture reduces switchgear size. The solid insulated switchgear measures 700 × 2000 × 1150, only 1/6 of a traditional air insulated type such as KYN61.

Optimized Electric Field
Computer simulation is used to optimise the electric field and insulation design.

Safety
Live parts sealed to IP67.
Inner-cone cable terminals improve connection reliability.

Extreme Environment Application
Suitable for cold, high-altitude, humid, corrosive, low-lying and explosion-hazard areas.

All Operating Condition Environment

• Ambient temperature: -50°C ~ +70°C;
• Altitude: ≤ 5500 m
• Internal and external arcing test report (switches, bus bar, cable compartment)
• Immersion detection test report
• Salt spray testing report
• The circuit breaker is composed of mechanism transmission box and circuit breaker poles.

Parameters

Parameter Title	Unit	Vacuum Circuit Breaker	Disconnecting Switch	Earthing Switch
Rated Voltage	kV	40.5	40.5	40.5
Arc Quenching	-	Vacuum	-	-
Rated Current	A	1250	1250	1250
Rated Frequency	Hz	50/60	50/60	50/60
Main Circuit Resistance	μΩ	≤120	≤120	≤120
Power Frequency Withstand Voltage(1 min)	kV	118	118	118
Lightning Impulse Withstand Voltage	kV	215	215	215
Rated Short-circuit Breaking Current	kA	31.5	-	-
Breaking Times	times	30	-	-
Rated Short-circuit Making Current	kA	80	-	-
Rated Short-time Withstand Current/ Duration	kA/S	31.5/4s	31.5/4s	31.5/4s
Rated Peak Withstand Current	kA	80	80	80
Internal Arcing Test (AFLR level)	kA/S	31.5kA/0.5s (including bus compartment, switch compartment, cable compartment)
Degree of Protection	-	IP67	IP67	IP67
Mechanical Endurance	Times	10000	3000	3000