🔌 Medium Voltage Switchgear

Econo Solar

KYN28A-12 (GZS1)

Name: KYN28A-12 (GZS1) Armored Withdrawable AC Metal-Enclosed Switchgear
Brand: Econo Solar
Availability: InStock

Armored Withdrawable AC Metal-Enclosed Switchgear

Indoor, armored, drawout switchgear for 3.6–12kV single busbar and single busbar sectionalized systems. The standard medium-voltage cabinet for PV plant grid-interconnection points — incoming/outgoing feeder control, protection and metering in one cabinet, with full "five-prevention" interlocking.

3.6–12 kV

Rated Voltage

≤5000 A

Rated Current

IP4X

Protection

Request a Quote → Request Datasheet

Key Features

Why Engineers Choose the KYN28A-12

Datasheet-backed advantages for medium-voltage interconnection points.

🛡

Armored, Four-Compartment Design

Busbar, breaker handcart, cable and relay/instrument compartments are fully segregated by steel barriers, containing any internal arc fault to its own compartment.

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"Five-Prevention" Interlocking

Mechanical interlocks prevent pulling the breaker under load, mis-operating the breaker, entering a live compartment, and mis-operating the earthing switch — the standard safety baseline for GB 3906 switchgear.

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Interchangeable Breaker Handcart

Accepts a ZN63A-12 (VS1) vacuum circuit breaker or an ABB VD4 vacuum circuit breaker on the same drawout trolley, with isolating, test and working positions.

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Front-Access, Space-Efficient

All installation, debugging and maintenance is performed from the front, allowing back-to-back double-row arrangement or direct wall installation to cut substation footprint.

Specifications

Complete Technical Datasheet

Parameters sourced from the manufacturer's KYN28A-12(GZS1) technical datasheet. Fields the source documentation does not state clearly are marked [DATA REQUIRED].

Rated Voltage	3.6 / 7.2 / 12 kV
Rated Frequency	50 Hz
Rated Current (main & branch busbar)	630, 1250, 1600, 2000, 2500, 3150, 4000, 5000 A
1-min Power-Frequency Withstand Voltage	42 kV
Rated Lightning Impulse Withstand Voltage (peak)	75 kV
Rated Short-Time Withstand Current (rms)	16, 20, 25, 31.5, 40, 50 kA
Rated Peak Withstand Current	40, 50, 63, 80, 100, 125 kA
Rated Short-Circuit Duration	4 s
Protection Degree	IP4X (enclosure) / IP2X (compartment & handcart door open)
Compatible Breakers	ZN63A-12 (VS1 vacuum) · ABB VD4 vacuum
Busbar System	Single busbar / single busbar sectionalized
Interlocking	"Five-prevention" mechanical interlock
Installation	Indoor, front-access; back-to-back or wall-mount arrangement
Operating Ambient Temperature	−10 °C to +40 °C
Altitude	≤1000 m (standard; consult for higher-altitude derating)
Weight	700–1200 kg (configuration dependent)
Standards	IEC 60298 · GB 3906
Partial Discharge / Arc-Fault Relief	[DATA REQUIRED]
Auxiliary / Control Voltage	[DATA REQUIRED]

Applications

Where the KYN28A-12 Fits Best

Optimized for medium-voltage switching duty in solar and hybrid energy plants.

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PV Plant Grid-Interconnection Point

Main incoming and outgoing MV feeder cabinets at the substation where the plant's step-up transformer(s) connect to the utility grid.

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C&I Site MV Distribution

Internal medium-voltage ring or radial distribution within large commercial and industrial PV + BESS sites with multiple transformer feeders.

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BESS Step-Up Switching

Incoming/outgoing protection for utility-scale battery storage blocks stepping up to the plant's MV collection system.

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Auxiliary Load & Motor Feeders

Starting and protection for large auxiliary motors (cooling pumps, compressors) on hybrid solar-plus-generation sites.

FAQ

What Engineers Ask About the KYN28A-12

Datasheet-driven answers for procurement teams and switchgear designers.

What voltage classes does the KYN28A-12 support?

The KYN28A-12 is built for 3.6kV, 7.2kV and 12kV three-phase AC 50Hz single busbar and single busbar sectionalized systems, with a 1-minute power-frequency withstand voltage of 42kV and a rated lightning impulse withstand voltage of 75kV.

What is the maximum current rating of the KYN28A-12?

Rated current steps are 630 to 5000A for both the main and branch busbars, with rated short-time withstand current up to 50kA and rated peak withstand current up to 125kA.

What circuit breakers are compatible with the KYN28A-12?

The cabinet accepts a ZN63A-12 (VS1) vacuum circuit breaker handcart or an ABB VD4 vacuum circuit breaker handcart, both on an interchangeable drawout trolley.

What is the "five-prevention" interlocking function?

It is a mechanical interlock scheme that prevents: pulling/pushing the breaker handcart under load, mis-operating the breaker, entering a live compartment by mistake, closing the earthing switch with the circuit live, and closing the breaker with the earthing switch closed.

What protection degree does the KYN28A-12 cabinet carry?

The outer enclosure is IP4X. When a compartment door or the breaker handcart door is open, the protection degree at that opening is IP2X, per GB 3906 and IEC 60298.

Can the KYN28A-12 be installed back-to-back or against a wall?

Yes. All installation, debugging and maintenance access is from the front of the cabinet, so units can be arranged back-to-back in double rows or installed directly against a wall to reduce substation footprint.