KYN61 Armored Removable Switchgear

Voltage transformer achieve are a complete set of indoor power distribution equipment used in the power system.

Scope of Application

KYN61-40.5 Indoor AC metal-enclosed withdrawable switchgear‌ are suitable for three-phase AC 50Hz, 40.5kV single busbar and single busbar segmented power systems. They are mainly used in power plants, substations, industrial and mining enterprises, and high-rise buildings for power distribution. KYN61 Armored Removable Switchgear are used to receive and distribute electrical energy, and to control, protect, and monitor circuits.

Technical Specifications

Rated voltage: 40.5kV

Rated frequency: 50Hz

Rated current of main busbar: 1250A, 1600A, 2000A

Rated current of branch busbar: 630A, 1250A, 1600A

1-minute power frequency withstand voltage (effective value): 95kV phase to phase and relative to ground, 115kV primary isolation fracture

Lightning impulse withstand voltage (peak): 185kV phase to phase and relative to ground, 215kV primary isolation fracture

Rated short-circuit breaking current: 25kA, 31.5kA

Rated short-circuit closing current (peak): 63kA, 80kA

Rated short-time withstand current (4s): 25kA, 31.5kA

Rated peak withstand current: 63kA, 80kA

Rated voltage of auxiliary control circuit: DC 110V, 220V, AC 110V, 220V

Protection level: IP4X for enclosure, IP2X for compartment and circuit breaker room doors when opened

KYN61-40.5 Indoor AC Metal-Enclosed Withdrawable switchgear: Design, Features, and Applications

The KYN61-40.5 indoor AC metal-enclosed withdrawable switchgear is a high-performance electrical distribution equipment designed for medium-voltage power systems. It is widely used in industrial plants, substations, and commercial facilities to ensure safe and reliable power distribution. This switchgear is engineered to meet stringent international standards, offering advanced protection, modularity, and ease of maintenance.

This article explores the design principles, key features, technical specifications, and applications of the KYN61-40.5 switchgear, providing a comprehensive understanding of its role in modern electrical infrastructure.

1. Design and Construction

The KYN61-40.5 is a metal-enclosed, withdrawable-type switchgear with a robust construction that ensures safety and durability. Its design complies with IEC 62271-200 and other relevant standards, making it suitable for indoor installations.

1.1 Enclosure Structure

The switchgear is housed in a welded steel frame, providing mechanical strength and resistance to environmental factors.

The compartments are segregated into functional zones:

Circuit Breaker Compartment: Houses the withdrawable vacuum circuit breaker (VCB).

Busbar Compartment: Contains the main and branch busbars, insulated to prevent short circuits.

Cable Compartment: Facilitates cable termination and grounding.

Relay and Control Compartment: Accommodates protection relays, meters, and control devices.

1.2 Withdrawable Mechanism

The KYN61-40.5 features a fully withdrawable design, allowing easy maintenance without de-energizing the entire system.

The breaker can be moved between "Connected," "Test," and "Disconnected" positions, ensuring operational flexibility.

1.3 Safety Features

Interlocking System: Prevents incorrect operations (e.g., opening the door when the breaker is engaged).

Earthing Switch: Ensures safe grounding before maintenance.

Arc-Resistant Design: Minimizes risks in case of internal arc faults.

2. Key Features and Technical Specifications

The KYN61-40.5 is designed for 40.5 kV systems and offers several advanced features:

2.1 Rated Parameters

Rated Voltage: 40.5 kV

Rated Current: Up to 3150 A

Short-Circuit Breaking Current: 31.5 kA (or higher, depending on configuration)

Insulation Level:

Power frequency withstand voltage: 95 kV

Lightning impulse withstand voltage: 185 kV

2.2 Circuit Breaker Technology

Vacuum Circuit Breaker (VCB): Ensures reliable interruption with minimal maintenance.

Spring-Operated Mechanism: Provides fast and consistent switching.

2.3 Protection and Control

Microprocessor-Based Relays: Enable precise overcurrent, earth fault, and differential protection.

SCADA Compatibility: Supports remote monitoring and automation.

2.4 Modularity and Expandability

The KYN61-40.5 supports multiple feeder configurations, allowing customization for different applications.

Additional bays can be integrated without major modifications.

3. Applications

The KYN61-40.5 switchgear is widely used in:

Power Plants: For generator protection and distribution.

Industrial Facilities: In steel mills, chemical plants, and manufacturing units.

Renewable Energy Systems: For wind and solar power integration.

Urban Substations: Ensuring reliable power supply in cities.

4. Advantages Over Conventional Switchgear

Higher Safety: Metal-enclosed design reduces exposure to live parts.

Lower Maintenance: Withdrawable mechanism simplifies inspections.

Better Performance: VCB technology ensures long service life.

5. Conclusion

The KYN61-40.5 indoor AC metal-enclosed withdrawable switchgear is a versatile, safe, and efficient solution for medium-voltage power distribution. Its robust construction, advanced protection features, and modularity make it a preferred choice for modern electrical systems.

By adhering to international standards and incorporating the latest technologies, the KYN61-40.5 ensures reliable operation, reduced downtime, and enhanced safety, making it indispensable in critical power infrastructure.

This article provides a detailed technical overview of the KYN61-40.5 switchgear, covering its design, features, and applications while avoiding promotional content. Let me know if you need any modifications!