KYN61-40.5 High Voltage Switchgear: Technical Scope

The KYN61-40.5 High Voltage Switchgear Customizable 40.5kV 35kV 30kV Indoor Withdrawable Armored Metal-clad Power Distribution Cabinet is an indoor metal-clad armored withdrawable AC switchgear platform engineered for primary substations, power plants, and demanding industrial installations. From a distribution system design perspective, selecting the right 40.5 kV switchgear is a balancing act between personnel safety, fault interruption performance, and long-term maintenance economics. At 40.5 kV, available arc energy during an internal fault is approximately three times that at 12 kV, making armored construction a fundamental safety requirement. JYDQ manufactures every panel under ISO 9001 quality management with complete type-test certification to IEC 62271-200 and GB 3906 at KEMA-accredited independent laboratories.

Four-Compartment Armored Construction

The metal-clad armored architecture of the KYN61-40.5 High Voltage Switchgear Customizable 40.5kV 35kV 30kV Indoor Withdrawable Armored Metal-clad Power Distribution Cabinet employs four fully segregated compartments—busbar, circuit breaker, cable termination, and low-voltage control—each isolated by grounded metal partitions. Pressure-relief flaps on each compartment vent arc gases safely away from switchroom personnel. The circuit breaker compartment door incorporates mechanical interlocks with the handcart racking mechanism: the door cannot be opened unless the breaker is in the isolated position. You will encounter 40.5 kV switchgear positioned either as a commodity item or as a system safety component—both framings are partially true, but neither is complete without knowing the fault level and switching duty of your application.

ZN85-40.5 Vacuum Circuit Breaker

The switchgear accommodates ZN85-40.5 vacuum circuit breakers rated 1250 A to 2000 A with breaking capacities of 20 kA, 25 kA, and 31.5 kA. The circuit breaker achieves M2-class mechanical endurance of 100,000 close-open operations—ten times the 10,000-operation industry threshold—eliminating mechanism overhaul from the lifecycle maintenance plan for capacitor bank switching, automatic load transfer, and auto-reclose applications. Operating time is specified as a defined range: 30–60 ms for opening and 50–100 ms for closing, giving protection engineers the precise timing data required for coordination calculations. The 230 W energy storage motor completes a full spring charge in 12 seconds or less, supporting the O-0.3s-CO-180s-CO operating sequence. Coils accept DC 220 V/110 V or AC 220 V/110 V, with opening coil currents of 0.96 A at 220 V and 1.05 A at 110 V.

Product Gallery

Key Technical Features

• M2-Class 100,000-Operation Mechanical Life: Ten times the 10,000-operation industry threshold, eliminating routine mechanism overhaul for capacitor switching, auto-reclose, and network reconfiguration duties.
• Withdrawable Three-Position Handcart: Screw-type racking with positive indication at isolated, test, and service positions. The multi-pin secondary plug at the test position enables complete protection relay injection without energizing the 40.5 kV main circuit.
• Type-Test-Certified Internal Arc Containment: Four compartments with grounded metal partitions and pressure-relief flaps validated to IEC 62271-200, containing arc faults within the compartment of origin.

Application Scenarios

Primary Substation 40.5 kV Distribution

KYN61-40.5 panels serve as the main switchboard in utility primary substations, supplying outgoing feeders at the critical 40.5 kV/12 kV transformation level. The 2000 A / 31.5 kA / 80 kA peak configuration supports bus-tie positions in double-busbar substations. If your site altitude exceeds 1000 m, altitude correction is available and should be confirmed at specification stage—standard ratings apply below 1000 m and may require adjustment at higher elevations.

Power Plant and Heavy Industrial Distribution

With 2000 A / 31.5 kA capability, the KYN61-40.5 High Voltage Switchgear Customizable 40.5kV 35kV 30kV Indoor Withdrawable Armored Metal-clad Power Distribution Cabinet provides medium-voltage auxiliary power for power plant balance-of-plant equipment and heavy industrial processes including steel mill arc furnace switching and chemical plant distribution. Projects have encountered cable entry delays when termination space requirements did not match the civil conduit layout—verifying 40.5 kV cable bending radius requirements against the civil arrangement at specification stage avoids field modifications that affect cost and schedule.

Technical Parameters (40.5kV)

Table 1: Main Technical Parameters of Spring Operating Mechanism

Table 2: Main Technical Parameters of Vacuum Switchgear

Table 3: Main Technical Parameters of Vacuum Circuit Breaker

Procurement Guidance

For procurement teams evaluating multiple 40.5 kV switchgear suppliers, confirm the type test scope covers power-frequency withstand (95 kV / 1 min), lightning impulse (185 kV), short-circuit breaking, short-time withstand (31.5 kA / 4 s), peak withstand (80 kA), IP3X verification, internal arc classification, and mechanical endurance at 100,000 operations. For buyers without in-house HV engineering expertise, supplying your one-line diagram, available fault level data, load current profile, and auxiliary supply voltage enables JYDQ to determine the correct configuration for your project without overspecification.

FAQ

1. What is KYN61-40.5 high voltage switchgear mainly used for?

KYN61-40.5 is indoor metal-clad withdrawable high voltage switchgear for 40.5kV power system. Itundertakes power receiving, distribution and fault protection in power substations, renewable energybooster stations and large industrial power supply systems.

2. What structural characteristics does KYN61-40.5 have?

The cabinet adopts metal partition structure and is divided into multiple independent sealedcompartments. The main switch is withdrawable handcart type. It can realize physical isolation from themain circuit, ensuring high safety during maintenance work.

3. What certifications do your KYN61-40.5 switchgears have?

All KYN61-40.5 high voltage switchgears from our factory hold CE certification. We can provide CE documents and full technical datasheets for tender review and customs clearance.

4. What warranty support can you provide for KYN61-40.5?

We provide 10 years warranty for all KYN61-40.5 switchgears. Our technical team provides remote operation guidance and fault analysis throughout the warranty period.