KYN Center Type Five-prevention Interlocking High Voltage Switchgear

The KYN Center type Five-prevention interlocking High voltage switchgear is a fully assembled, metal-enclosed, draw-out type switchgear primarily used in 3.6kV to 12kV three-phase AC power systems. It is designed for single busbar or double busbar configurations with branch feeder applications.

What is this equipment?

This equipment is a high-voltage power distribution cabinet that houses circuit breakers, disconnectors, grounding switches, current transformers, voltage transformers, and protection relays. Its defining feature is the "five-prevention interlocking" mechanism, which physically prevents:

1. Closing with grounding switch closed

2. Opening the front cover with the breaker closed

3. Inserting or removing the breaker when the switch is closed

4. Operating the grounding switch when live

5. Closing the circuit breaker without control power

What does it do?

It safely receives electrical energy from a transformer or incoming line and distributes it to outgoing feeders such as motors, transformers, capacitor banks, or secondary substations. The KYN Center type Five-prevention interlocking High voltage switchgear is the backbone of medium-voltage industrial and utility networks.

Model Code Breakdown:

● KYN – K: Metal-clad Y: Draw-out type N: Indoor

● Center type – Modular center-breaker configuration

● Five-prevention interlocking – Mechanical and electrical error-proofing

● High voltage switchgear – Rated up to 12kV

Product Parameter (Specification)

Product Feature And Application

1. High Safety – Five-Prevention Interlocking

The KYN Center type Five-prevention interlocking High voltage switchgear features mandatory mechanical interlocks between the breaker, isolating contacts, grounding switch, and front panels. This eliminates the risk of operator error – the #1 cause of arc flash incidents.

2. Compact Modular Construction

The draw-out breaker trolley slides smoothly on rails with three distinct positions: operating, test/isolated, and withdrawn. This allows maintenance without de-energizing the entire busbar – a critical advantage for data centers and hospitals.

3. Intelligent Monitoring & Control

Optional intelligent IEDs (relays) provide:

● Real-time current, voltage, and power monitoring

● Overcurrent, earth fault, and directional protection

● RS485/Modbus or IEC 61850 communication

● Remote open/close via SCADA

● Standard temperature and humidity sensors inside the breaker compartment prevent condensation.

4. High Mechanical Reliability

● Breaker mechanism life: 30,000 operations (maintenance-free)

● Auxiliary contacts: Silver-nickel alloy for 10,000+ electrical operations

● Primary disconnecting contacts: Silver-plated copper with spring pressure

Application Areas

Production Details

1. Enclosure Fabrication

● 2.0mm cold-rolled steel (zinc-coated) or 1.5mm stainless steel

● Laser-cut and CNC-bent for precision

● Welded frame with corrosion-resistant powder coating (RAL 7035 standard)

2. Five-Prevention Interlocking Mechanism

● Steel cam plates and interlocking rods (no plastic parts)

● Tested for 10,000 interlocking cycles without failure

● Includes key interlock for incoming/outgoing and tie panels

3. Breaker Trolley

● Draw-out chassis with three-position locking

● Self-aligning primary disconnects

● Secondary plug with 16–32 control circuits

4. Busbar System

● High-conductivity E-Cu copper (ETP grade)

● Silver-plated joints with Belleville washers

● Heat-shrink insulated for phase isolation

5. Cable Compartment

● Generous space for up to 4×240mm² cables per phase

● Removable cable clamping bracket

● Provision for zero-sequence CT

6. Factory Testing

● 100% dielectric withstand test

● Mechanical operation test (50 cycles minimum)

● Partial discharge measurement (≤5pC at 1.2× rated voltage)

● Contact resistance measurement (micro-ohmmeter)

7. Certification & Quality Assurance

● Type-tested in accordance with GB/T 3906, IEC 62271-200, and DL/T 404

● Internal arc tested (IAC AFLR 40kA/1s)

● ISO 9001:2015 certified manufacturing

● Routine test report included with each panel

Why Choose Lugao Power Co., Ltd. Over Competitors?

Common Customer Questions

Q1: Can this KYN Center type Five-prevention interlocking High voltage switchgear be used for 24kV systems?

A: No, the standard KYN is rated up to 12kV. For 24kV, we offer the KYN28-24 variant with increased insulation clearance. Please specify your system voltage when requesting a quote.

Q2: Do you provide the vacuum circuit breaker as part of the KYN Metal-Clad Switchgear?

A: Yes, every panel comes fully assembled with a factory-tested vacuum circuit breaker (VS1 type). We also offer compatible alternatives such as ABB VD4, Siemens 3AH, or Schneider HVX if preferred.

Q5: Can you supply a full switchgear lineup including incoming, metering, feeder, and capacitor panels all as KYN Metal-Enclosed Switchgear?

A: Absolutely. We design and manufacture complete lineups with all required auxiliary compartments, busbar connections, and inter-panel interlocks. Just send your single-line diagram.

Q6: What documentation do you provide?

A: For every KYN switchgear, we provide: general arrangement drawing, wiring schematic, bill of materials, test report, instruction manual, and interlocking matrix – all in English (or your local language).

Q7: Is the five-prevention interlocking field-adjustable?

A: No – and this is intentional. The interlocking is factory set and sealed to prevent tampering. However, we provide clear mechanical drawings so your team understands the logic. If you need changes, contact our engineering department.

Manufacturing Capability

Lugao Power Co., Ltd. manufactures KYN Center Type Five-Prevention Interlocking High Voltage Switchgear in a modern production facility equipped with advanced fabrication, assembly, and high-voltage testing equipment. Every switchgear panel is produced under a strict ISO 9001 quality management system, ensuring consistent quality, reliable performance, and full compliance with international standards.

Manufacturing Strength