KYN61-40.5(Z) 3-Phase Indoor Medium Voltage Metal-Clad Switchgear

What Is KYN61-40.5(Z) Metal-Clad Switchgear?

The KYN61-40.5(Z) is a fully enclosed, metal-clad, withdrawable switchgear unit designed for indoor medium-voltage power distribution systems. Rated for 40.5kV and suitable for 50Hz AC, this switchgear is ideal for utility substations, power plants, and heavy industrial facilities that demand high safety, modularity, and long-term reliability.

Model meaning

Key Advantages of TRONKI KYN61-40.5(Z)

High Safety and Arc Protection

• Fully compartmentalized metal-clad design ensures that faults are isolated, minimizing the risk of arc flash propagation.

• Mechanical interlocking and “five-prevention” features guard against misoperation, enhancing personnel safety.

Modular Withdrawable Construction

• Vacuum circuit breaker (VCB) units are mounted on handcarts, allowing for quick replacement and maintenance without shutting down the entire system.

• The screw-nut drive mechanism enables smooth insertion and withdrawal, preventing mechanical damage during operation.

Environmental and Mechanical Robustness

• Suitable for ambient temperatures from -15°C to +40°C, with relative humidity up to 95%.

• Withstands earthquakes up to intensity 8 and altitudes below 2000m, making it ideal for harsh environments.

Smart Space Utilization

• Spacious cable chamber accommodates multiple cable terminations, and the optional grounding switch allows for fast and safe earthing.

Maintenance-Friendly and Smart Monitoring Options

• All operations, including breaker insertion and isolation, can be done with the cabinet doors closed.

• Optional support for digital diagnostics and remote monitoring, reducing onsite labor and enhancing predictive maintenance.

Main technical parameters of vacuum circuit breaker

Main technical parameters of vacuum switchgear

Shape dimensions

Main technical parameters of spring operating mechanism

Switchgear installation

a. Height of electrical room: ≥ 4500mm;
b. Distance from the wall behind the cabinet: ≥ 1500mm;
c. The flatness of the basic structure: ≤ 1mm / m;
d. The part of the foundation embedded channel steel above the ground shall not exceed 3mm;
e. Can be fixed on the foundation with bolts or welding;
f. The weight of the switch cabinet is about 1800kg;
g. The width of the switchgear operation corridor (single row): ≥ 3000mm; Double-sided (face-to-face) ≥ 4000mm.

Equipment structure diagram

How It Compares to Similar Switchgear Types

While metal-enclosed switchgear—as per IEEE C37.20.3—may be suitable for light-duty applications due to compactness and lower cost, it lacks the high degree of fault isolation offered by metal-clad designs.
TRONKI’s KYN61-40.5(Z) features fully segregated compartments, making it ideal for critical infrastructure like:

• Utility substations with high short-circuit levels

• Power-intensive manufacturing plants

• Data centers requiring high availability

Sources:

• IEEE C37.20.2 standard on metal-clad switchgear

• ABB White Papers on Medium Voltage Systems

• Wikipedia – Switchgear

Selection Guide

When choosing the right switchgear for your application, consider the following:

• Rated voltage and current capacity required by your system

• Fault current level at the point of installation

• Space constraints (KYN61 requires ~3m aisle width)

• Need for smart monitoring and remote diagnostics

• Environmental conditions (humidity, altitude, seismic activity)

Our team can provide customized configurations including optional components such as SF₆ breakers, smart relays, and arc fault detection modules.

FAQ

Q1: What’s the difference between KYN28 and KYN61 switchgear?

A: KYN28 is typically rated for systems up to 24kV, while KYN61 supports 40.5kV. KYN61 is better suited for high-voltage, high-fault-level applications and offers enhanced insulation and breaking capacity.

Q2: Can the KYN61-40.5(Z) be used in remote or harsh environments?

A: Yes. With a rated IP3X/IP2X enclosure and wide environmental tolerance, the switchgear is ideal for remote substations, mining sites, and areas with seismic activity.

Q3: What installation space is required?

A: Recommended space includes:

• Ceiling height ≥ 4500mm

• Rear wall clearance ≥ 1500mm

• Single-row operation corridor ≥ 3000mm

• Flat, level base with ≤1mm/m deviation

Ready to Upgrade Your Medium Voltage System?

TRONKI offers full-service support, from system design and on-site installation to 24/7 maintenance and remote monitoring.
Contact us today to request a technical datasheet, schedule a virtual consultation, or get a tailored quote.

Email: sales@tronkiele.com
Website: www.tronkiele.com