Product Description
KYN28-12 indoor metal-clad withdrawable high voltage switchgear is our core high-voltage complete equipment for 12kV three-phase AC power distribution systems, complying with GB 3906 and IEC 62271 standards. It adopts fully enclosed metal-clad structure with withdrawable circuit breaker trolley and complete five-prevention interlock mechanism, fundamentally eliminating safety accidents such as wrong switching, live trolley pushing/pulling and closing with earthing switch. Rated current ranges from 630A to 2500A, and 4s short-time withstand current reaches up to 31.5kA with stable insulation performance and IP4X enclosure protection. Independent compartments for busbar, circuit breaker, cable and instrument are equipped with pressure relief channels for safe pressure release under short-circuit faults. Relay protection, intelligent measurement & control and remote communication modules are optional to realize unattended intelligent operation of power distribution rooms. The cabinet adopts cold-rolled steel plate with electrostatic powder coating for anti-corrosion and long service life, adapting to long-term working conditions in factory zones and damp basements.
Application Introduction
As core 10kV high voltage power distribution equipment, it is widely used in substations, industrial plant main power stations, photovoltaic/wind power booster stations, commercial real estate switching stations, hospitals, schools, municipal water conservancy projects and energy storage power stations for high voltage incoming, bus section, transformer protection and capacitor compensation. Our integrated high & low voltage industrial chain production capacity enables KYN28 high voltage switchgear to match downstream GGD, GCS low voltage cabinets, XL-21 and JP terminal distribution boxes, forming a complete full-link power distribution solution of “High Voltage – Transformer – Low Voltage Terminal”. We have accumulated massive cases of power grid renovation, new energy power generation and overall power distribution of large industrial parks, providing one-stop services including electrical scheme design, high voltage complete set manufacturing, full factory withstand voltage & partial discharge test, on-site installation & commissioning and after-sales inspection & maintenance. All products are self-produced with unified and controllable quality, saving customers the complicated process of docking multiple suppliers.
Complete climate control, automated feeding/egg collection, and manure drying systems. (Exported to 30+ countries)
Water treatment plants must operate reliably around the clock, often in remote locations. Unplanned downtime, high energy consumption, and inefficient manual processes are common pain points.
Mining operations demand rugged, reliable electrical equipment capable of performing in harsh conditions—extreme temperatures, dust, moisture, and vibration.
Food processing facilities require strict hygiene standards, precise temperature control, and reliable production line uptime.
Non-ferrous metal processing—including aluminum, copper, and rare earth refining—involves high-temperature operations, large electrical loads, and complex process control.
Residential and commercial communities need reliable, safe, and efficient power distribution.
Technical Parameters
| Category | Parameter | Value |
| Electrical Data | Rated Voltage | 12kV |
| Rated Frequency | 50Hz | |
| Rated Normal Current | 630A / 1250A / 1600A / 2000A / 2500A | |
| Rated Short-time Withstand Current (4s) | 20kA / 25kA / 31kA / 31.5kA | |
| Rated Peak Withstand Current | 50kA / 63kA / 78kA / 80kA | |
| Rated Insulation Level | 12/42/75kV | |
| Rated Breaking Current | Matched with 4s short-time withstand current | |
| General Data | Protection Degree of Enclosure | IP4X |
| Earthing System | TN-S, TN-CS, IT | |
| Standard Compliance | IEC 62271-200, GB 3906 | |
| Environmental Conditions | Ambient Air Temperature | Upper limit +40℃, Lower limit -10℃ (normal area) |
| Altitude | ≤ 1000m above sea level | |
| Relative Humidity | Daily average ≤95%, Monthly average ≤90% | |
| Water Vapor Pressure | Daily average ≤2.2kPa, Monthly average ≤1.8kPa | |
| Condensation Note | Condensation may occur under sudden temperature drop with contamination, anti-condensation device optional | |
| Installation | Indoor, vertical (inclination ≤ 5°) | |
| Cabinet & Construction | Structure Type | Metal-clad withdrawable type, modular assembled frame |
| Surface Treatment | Electrostatic epoxy powder spraying | |
| Standard Cabinet Color | RAL 7035 | |
| Main Compartment Division | Busbar compartment / Circuit breaker compartment / Cable compartment / Control compartment, fully isolated |
Series Selection Guide
| Model Type | Rated Current (A) | 4s Short-time Withstand Current (kA) |
| KYN28-12/630 | 630 | 20 / 25 / 31.5 |
| KYN28-12/1250 | 1250 | 20 / 25 / 31.5 |
| KYN28-12/1600 | 1600 | 25 / 31 / 31.5 |
| KYN28-12/2000 | 2000 | 31 / 31.5 |
| KYN28-12/2500 | 2500 | 31 / 31.5 |
