KYN61-40.5 40.5kV Air Insulated Metal-Clad Switchgear

Model meaning

Product Overview

KYN61-40.5 switchgear provides a metal-enclosed, compartmentalized platform for medium-voltage distribution at a rated voltage of 40.5kV. The withdrawable vacuum circuit breaker can be specified for incoming, outgoing, transformer-feeder, bus-coupler and other project-defined panel functions. Main-circuit ratings, protection, metering, auxiliary power and communication interfaces are finalized during technical review.

The cabinet arrangement separates the circuit-breaker, busbar, cable and low-voltage control areas to support safe operation, inspection and maintenance. Shutters, earthing-switch arrangements and mechanical/electrical interlocks are configured according to the approved scheme. Final interlock logic and access conditions are confirmed in the project drawings.

Key Features

·Withdrawable vacuum circuit breaker with defined service, test/disconnected and maintenance positions, subject to the selected breaker design.

·Metal-clad compartmentalization for the breaker, busbar, cable and low-voltage control areas.

·Automatic shutter and interlocking functions designed to reduce common operating errors.

·Project-specific CT, VT, metering, protection relay, auxiliary power and SCADA interfaces.

·Lineup engineering from the customer's SLD, panel schedule and cable-entry requirements.

·General arrangement, secondary schematics and order-stage documentation prepared for approval.

Technical Data

The following values define the current standard website baseline. Final guaranteed values apply only to the approved offer, drawings and contract documents.

Parameter	Website baseline
Model	KYN61-40.5
Switchgear type	Indoor air-insulated, withdrawable metal-clad switchgear
Rated voltage	40.5 kV
Rated frequency	50 Hz
Rated current	Up to 2000 A; final main-bus and feeder currents by approved lineup
Rated short-circuit breaking current	Up to 31.5 kA
Rated short-time withstand current	31.5 kA for 4 s
Rated peak withstand current	80 kA
Rated short-circuit making current	80 kA peak
Power-frequency withstand voltage	95 kV, 1 min
Lightning impulse withstand voltage	185 kV peak
Enclosure protection	IP4X; internal partition protection IP2X with the relevant compartment door open, subject to final approved configuration
Circuit-breaker type	Withdrawable vacuum circuit breaker; make and model confirmed during technical review
Auxiliary / control supply	Project-specific; DC 220 V was used in the documented tested configuration
Standard service ambient	−15°C to +40°C
Standard installation altitude	≤1000 m above sea level
Dimensions	Panel- and scheme-specific; confirmed on the approved general arrangement drawing
Cable entry and termination	Project-specific according to cable data and approved layout

Typical Panel Functions

Panel function	Typical role
Incoming feeder	Receives power from the utility, transformer or upstream switchgear; protection, metering and CT data are project-specific.
Outgoing line feeder	Distributes power to downstream substations, process loads or distribution feeders.
Transformer feeder	Controls and protects a transformer circuit based on transformer rating, vector group and protection philosophy.
Bus coupler / bus section	Connects or sections busbar groups according to the approved bus arrangement and operating sequence.
PT / metering panel	Provides voltage measurement, metering or bus-voltage functions where required by the SLD.
Auxiliary / control panel	Integrates project-defined control, annunciation, communication or station auxiliary functions.

Configuration and Protection Options

The switchgear can be engineered with project-approved vacuum circuit breakers, current and voltage transformers, protection relays, meters, surge arresters, earthing switches and auxiliary devices. Component brands, ratios, accuracy classes, burdens, CT core quantities, relay functions, control voltage and communication protocol must be stated in the inquiry or agreed during technical clarification. Equivalent substitutions are made only with customer approval.

Operating Conditions and Regional Engineering

Standard indoor service

The standard website baseline is an ambient temperature of −15°C to +40°C and an installation altitude not exceeding 1000m. The installation room should be suitable for indoor electrical equipment and protected from abnormal condensation, corrosive gases, excessive dust, vibration and other conditions outside the agreed project specification.

Russia, CIS and wider Eurasia

For cold-climate and local-utility projects, state the minimum outdoor and indoor operating temperatures, heating and ventilation philosophy, altitude, seismic level, pollution conditions, building temperature control, required document language and applicable standards or conformity documents. Service below −15°C is not part of the standard website rating and requires technical evaluation and, where feasible, a special design. Any EAC-, GOST- or local-regulation deliverable must be confirmed for the specific project before quotation.

Africa and the Middle East

For high-ambient, dusty, coastal or high-altitude locations, provide the maximum indoor temperature, altitude, humidity, dust and salt-contamination conditions, cooling arrangement and required enclosure protection. Conditions above +40°C or 1000m may require thermal review, derating, insulation review or a special design.

Standards, Testing and Documentation

The offered switchgear is reviewed against the project specification and the applicable IEC, GB or other agreed standards. The exact standard, edition and conformity-document scope are confirmed in the commercial and technical offer; they should not be inferred from the model name alone.

Third-party type-test documentation is available for a 40.5kV, 2000A and 31.5kA switchgear configuration. The applicable report scope is confirmed during technical review. Routine inspection and order-stage testing requirements are agreed for the offered lineup, and project documentation can include approved drawings, secondary schematics, manuals and test records as specified in the contract.

Dimensions, Installation and Interfaces

Cabinet width, depth and height vary with the panel function, busbar arrangement, breaker selection, cable termination, CT/VT arrangement and internal clearances. Fengyuan Power issues a project-specific general arrangement drawing showing the lineup, foundation openings, cable-entry zones, transport sections, maintenance clearances and interface points. Do not finalize the switchroom or civil foundation from a generic catalogue dimension.

Applications

·Utility and industrial substations

·Power plants and renewable-energy collection substations

·Mining, metals, cement, oil and gas, and process industries

·Infrastructure, water and large commercial or institutional power systems

·33kV and 35kV distribution projects requiring 40.5kV-class indoor equipment

Why Fengyuan Power

Founded in 2010, Fengyuan Power manufactures power distribution equipment in Henan, China and supports international projects with application engineering and order documentation. For KYN61-40.5 projects, the team can review the single-line diagram, prepare a panel-by-panel proposal and coordinate general arrangement and secondary drawings for approval. Company management-system certificates and manufacturing credentials are available separately; product conformity and test-document applicability remain configuration- and contract-specific.

Explore related equipment: high-voltage switchgear and indoor vacuum circuit breakers. Final component compatibility is confirmed in the technical offer.

FAQ

1. What is KYN61-40.5 switchgear?

KYN61-40.5 is an indoor, air-insulated, withdrawable metal-clad switchgear platform rated at 40.5kV. It is used to receive, distribute, control and protect power in substations and industrial networks.

2. Why is 40.5kV switchgear used in a 35kV system?

A 35kV network is commonly matched with equipment in the 40.5kV rated-voltage class so that the equipment insulation level covers the system's highest voltage and insulation-coordination requirements. The final selection follows the applicable utility and project standard.

3. Can KYN61-40.5 be used in a 33kV system?

Yes, it may be selected for a 33kV project when the system study, insulation coordination and client specification call for 40.5kV-class equipment. Send the SLD and system parameters for confirmation.

4. What rated current and short-circuit levels are available?

The current website baseline is up to 2000A, with rated short-circuit breaking current up to 31.5kA and short-time withstand current of 31.5kA for 4s. The final rating is confirmed for each panel and busbar section.

5. Which panel types can be supplied?

Typical functions include incoming, outgoing line, transformer feeder, bus coupler or bus section, PT/metering and project-specific auxiliary panels. The final lineup is developed from the approved SLD and panel schedule.

6. Is the standard design suitable below −15°C?

The standard website service range is −15°C to +40°C. Lower-temperature service requires technical evaluation of the installation room, heaters, materials, mechanisms, auxiliaries and required local standard. A special design is confirmed only in the project offer.

7. Can the switchgear be supplied for Russia or CIS projects?

Fengyuan Power can evaluate Russia, CIS and wider Eurasian project requirements. The inquiry must identify the applicable standards, local technical regulations, conformity-document expectations, language, climate, seismic and utility requirements. EAC- or GOST-related scope is confirmed project by project and is not implied by the model name.

8. Are cabinet dimensions fixed?

No. Dimensions vary with the panel function, breaker, busbar, CT/VT arrangement, cable entry and project clearances. Use the approved project general arrangement drawing for civil and switchroom design.

9. What test documentation is available?

Third-party type-test documentation is available for a specific 40.5kV, 2000A and 31.5kA configuration. Its applicability, together with routine-test and inspection documentation for the order, is reviewed during technical clarification.

10. What information is needed for a quotation?

Provide the single-line diagram, panel quantities and functions, rated voltage, frequency, rated current, short-circuit level and duration, CT/VT data, protection requirements, auxiliary voltage, site conditions, standards, destination country and delivery requirements.

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