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Compliant Globally IEC 62271-200Standard, through IAC type test, protection level is IP4X (outer shell) / IP2X (door open). KYN28A-12 (12kV), KYN28-24 (24kV), KYN61-40.5 (40.5kV) are suitable for the mainstream medium-voltage power grids of Southeast Asia, Asia and South America.
Metal outer shell withdrawable structure, equipped with five-level interlocking system, ensuring operational safety. The cabinet uses ZAM steel material, processed through multiple bending techniques, high strength, corrosion resistant. All front operations can be realized, supporting wall-mounted installation, saving space.
Rated current range is
Product Details
TNNPI IEC metal-clad withdrawable MV switchgear is designed for reliable medium-voltage power distribution, switching and protection. Available in 12kV, 24kV and 40.5kV configurations, the panel integrates a withdrawable vacuum circuit breaker, busbar compartment, cable compartment, CT/PT and protection control system. KYN28A and KYN61 configurations can be engineered for different voltage classes and project requirements. The withdrawable VCB design supports service, test and isolated positions, simplifying inspection and maintenance. Panel dimensions, busbar arrangement, protection relay, cable entry and electrical components can be customized according to customer SLDs and IEC requirements.
Applications
Suitable for substations, utility power grids, industrial plants, mining projects, commercial infrastructure, renewable energy facilities and large power distribution systems. The 12kV/24kV configuration is suitable for medium-voltage distribution networks, transformer feeders and industrial power systems, while the 40.5kV class is suitable for higher-voltage substations and grid distribution. KYN28A and KYN61 panels can be arranged as incoming feeders, outgoing feeders, transformer protection, bus couplers and metering panels to create complete MV switchgear lineups.
Core Technical Parameters
- Rated Voltage: 12kV / 24kV / 40.5kV
- Rated Current: Up to 3150A
- Circuit Breaker: Withdrawable Vacuum Circuit Breaker (VCB)
- Rated Frequency: 50/60Hz
- Short-Circuit Breaking Current: Up to 31.5kA
- Standard: IEC 62271-200 / IEC 62271 series
FAQ
Q1: What voltage levels are available?
12kV, 24kV and 40.5kV configurations can be supplied according to project requirements.
Q2: Are KYN28A and KYN61 both available?
Yes. We can provide KYN28A-class and KYN61-class metal-clad withdrawable switchgear configurations.
Q3: Is the VCB withdrawable?
Yes. The vacuum circuit breaker can be moved between service, test and isolated positions.
Q4: Can the panel be customized according to our SLD?
Yes. Busbar, CT/PT, protection relay, feeder arrangement and panel configuration can be customized.
Q5: Can TNNPI supply a complete MV switchgear lineup?
Yes. We can design and supply complete incoming, outgoing, bus-coupler, transformer protection and metering panels for project applications.
630A to 3150A, short-time withstand current up to 50kA. Wide operating temperature range (-40°C to +55°C) suitable for coastal humid environments, high altitude areas and dusty environments. Uses SF6-free vacuum breaking technology, environmentally friendly.
Flexible circuit breaker options (VS1, VD4, VEP etc.) use modular design, can be quickly replaced within 1.5 hours. Has independent import and export certifications, and provides OEM customization services.
Application Scenarios
Power generation and substation: KYN61-40.5 is suitable for power plants, secondary substations and transformers (100kVA-2500kVA) integration. It performs excellently in 35kV substations and hydropower generation systems.
Industrial and commercial applications: Widely used in metallurgy, chemical industry, mining, shipbuilding and other industries for motor control and protection, ensuring stable power supply under harsh conditions.
Renewable energy and infrastructure: Suitable for solar power stations, urban ring networks and building power distribution. Supports intelligent monitoring, real-time monitoring of power quality and remote operation and maintenance.
EPC projects: Has rich experience in offshore 33/11kV substation projects (e.g., 176 KYN28A-12 substations in the Republic of Djibouti). It is a reliable choice for engineering contractors.
General Parameters
Standard: IEC 62271-200, GB3906
Common Questions and Answers
Q1: Does it fully comply with IEC 62271-200 standard? Can test reports be provided?
A: Yes. We provide type test certificates (including IAC rated values) and batch test reports (withstand voltage, insulation resistance, interlocking check), each batch of equipment shipped has a corresponding serial number.
Q2: Which voltage levels are applicable to each model number?
A: KYN28A-12 → 12kV system; KYN28-24 → 24kV system; KYN61-40.5 → 35kV/40.5kV system. Please select according to the rated network voltage of your project.
Q3: Can you provide 60Hz power supply and match specified brands of circuit breakers?
A: Yes, both 50Hz and 60Hz power supplies are available. Circuit breakers can be VS1, VD4, VEP models, or vacuum contactors can be selected according to your requirements.
Q4: What is the mechanical durability?
A: Usually more than 50,000 operations. For frequent daily switching or automatic reclosing, please confirm the M2 durability level when ordering.
Q5: Packaging, delivery time and minimum order quantity?
A: Export-grade wooden boxes are used for sea transportation. Monthly production capacity is over 500 units. Delivery time depends on quantity/customization status. Minimum order quantity can be negotiated — welcome batch purchasers and project procurement merchants.
Q6: Intelligent monitoring and remote operation and maintenance?
A: Optional temperature and partial discharge sensors can be configured, supporting IEC 61850 protocol for remote management and unmanned operation.
