MV Switchgear

KYN61-40.5 Metal-Clad Withdrawable Switchgear

KYN61-40.5 metal-clad withdrawable switchgear receives and distributes power in indoor 35 kV-class substations and industrial facilities. Its withdrawable vacuum circuit breaker and enclosed primary sections combine switching, control and protection in a cabinet arrangement designed for operating and maintenance access.

Main-busbar ratings are 1,250, 1,600 or 2,000 A; branch-busbar ratings are 630, 1,250 or 1,600 A. Short-circuit breaking options are 25 or 31.5 kA. The enclosure is rated IP3X, with IP2X protection when the breaker compartment is open.

Technical Specifications

Rated Voltage	40.5 kV
Rated Frequency	50 Hz
Main Busbar Current	1250 / 1600 / 2000 A
Branch Busbar Current	630 / 1250 / 1600 A
Short-Circuit Breaking Current	25 / 31.5 kA
Short-Time Withstand Current	25 / 31.5 kA (4 s)
Peak Withstand Current	63 / 80 kA
Power-Frequency Withstand Voltage	95 kV (1 min)
Lightning Impulse Withstand Voltage	185 kV
Breaker Type	Withdrawable vacuum circuit breaker
Enclosure IP Rating	IP3X (IP2X truck door open)

Key Features

For 35kV-class distribution networks.
Withdrawable vacuum breaker — safe maintenance.
"Five-prevention" interlocking.
Robust armored construction.

Typical Applications

Power-station switchrooms
Utility 35 kV substations
Industrial and mining-site substations

Installation & Aftercare

Prepare the site, plan routine checks and keep service records.

What needs to be ready before installation?

For the listed configuration, the catalogue specifies indoor ambient −10 to +40 °C and altitude up to 1000 m.
Check the delivery route, floor loading and working aisle against the complete panel and breaker-handling arrangement.
Provide cable access, station earthing and the specified pressure-relief clearance; limit condensation and corrosive contamination in the room.

What should operators check during routine rounds?

Track operation counts, protection trips and abnormal indications, together with signs of moisture in the switchroom.

What is covered during planned maintenance?

At planned isolation, inspect breaker-truck contacts, interlocks, shutters and cable connections; test the specified control and protection functions.
Fault interruptions, sticking mechanisms or insulation contamination call for targeted inspection, with qualified servicing under the installed equipment instructions.

Customization Options

Define the electrical configuration and the details needed for your site.

Switchboard lineup: Incoming, outgoing, bus-coupler and metering panels to the approved single-line diagram.
Breaker & busbar duty: Select rated current and fault-breaking duty within the published series range.
Protection & measurement: Relay functions, CT/VT ratios, meter requirements and secondary circuit diagrams.
Cable & installation: Cable quantity and size, entry direction, panel interfaces and the required maintenance aisle.
Controls & signalling: Auxiliary supply voltage, local/remote control and requested alarm or communication interfaces.

Project-specific options and accessories are confirmed in the quotation and approved drawings.