KYN28-12 Armored Switchgear Manufacturer 12kV IEC62271

KYN28-12 Armored Withdrawable Type AC Metal-Enclosed Switchgear

KYN28-12(GZS1) type armoured removable AC metal enclosed switchgear (hereinafter referred to as “switchgear”) It is suitable for three-phase AC 50Hz power system, used to receive and distribute electrical energy and control, protect and monitor the circuit. The newly introduced and developed high current and high-breaking switchgear can also be used separately as a high-voltage generator outlet.

Product Overview - Why KYN28-12 Is Your Best Choice for 12kV MV Distribution

KYN28-12 Key Applications & Operating Conditions

This product conforms to the standards: GB3906 “3~35kV AC metal enclosed switchgear”, GB/T11022 “High voltage switchgear and control equipment standard common technical requirements”, IEC298 “rated voltage above 1kV 52kV and below AC metal enclosed switchgear and control equipment”.

KYN28-12 Model Number Explained

K	Y	N	28	–	12	Z
↓	↓	↓	↓		↓	↓
Metal armoured type	Shifting type	Indoor	Design sequence number		Rated voltage (KV)	Vacuum circuit breaker

Installation & Operating Conditions

• Ambient air temperature: maximum temperature +40℃ , minimum temperature -15℃ ;

• Relative humidity: daily average relative humidity: ≤ 95%, daily average water vapor pressure does not exceed 2.2KPa; Monthly average relative humidity ≤ 90%; The average monthly steam pressure does not exceed 1.8KPa;

• Altitude: ≤ 1000m;

• Seismic intensity: not more than 8;

• The surrounding air should be free from corrosive or flammable gas, water vapor and other obvious pollution;

• No violent vibration site;

• When used under normal conditions beyond GB3906, the user and the company shall negotiate.

KYN28-12 Technical Specifications & Rated Parameters

Parameter			Unit	Value
Rated Voltage			KV	3.6、7.2、12
Rated Frequency			Hz	50
Rated current of circuit breaker			A	630、1250、1600、2000、2500、3150、4000
Rated current of switchgear			A	630、1250、1600、2000、2500、3150、4000
Rated Short-time Withstand Current (4s)			KA	16、20、25、31.5、40、50
Rated Peak Withstand Current (Peak Value)			KA	40、50、63、80、100、125
Rated Short-Circuit Breaking Current			KA	16、20、25、31.5、40、50
Rated Short-Circuit Making Current(Peak Value)			KA	40、50、63、80、100、125
Rated Insulation Level	1min Power Frequency Withstand Voltage Rated	Phase to phase,phase to earth Gaps	KV	24、32、42
			KV	24、32、48
	Lightning Impulse Withstand Voltage (Peak)	Phase to phase,phase to earth Gaps	KV	40、60、75
			KV	46、70、85
Protection (IP)Rating				IP4X

FAQs

1: What is the rated voltage and frequency of the KYN28-12?

The KYN28-12 operates at 12kV rated voltage with 50/60Hz frequency—covering your standard medium voltage distribution requirements. It also supports 7.2kV and 40.5kV configurations in the KYN series family for broader network compatibility.

2: What does “armored withdrawable” mean vs. open-type switchgear?

“Armored” means each compartment is metal-separated—protecting your operators from arc faults during maintenance. “Withdrawable” allows you to pull out the circuit breaker truck for inspection or replacement without de-energizing the entire panel. This combination maximizes both your safety and operational continuity.

3: Does the KYN28-12 comply with IEC 62271?

Yes. The KYN28-12 is type-tested per IEC 62271-200 (AC metal-enclosed switchgear and controlgear for rated voltages above 1kV). Internal arc test classification is available for your personnel safety compliance. Full type-test reports are downloadable for your project review. → View certifications

4: What is the vacuum circuit breaker interruption time?

The integrated vacuum circuit breaker (VCB) achieves interruption in under 50ms—significantly faster than oil-type breakers. This rapid clearing protects your downstream equipment from sustained fault currents and reduces thermal stress on your busbar system.

5: Can you customize the KYN28-12 for my specific protection scheme?

Absolutely. As the direct manufacturer, we can configure your KYN28-12 with specific protection relay settings, CT/PT ratios, and interlocking logic. Custom busbar sizing, cable entry arrangements, and smart monitoring integration are also available.

6: What is the lead time for KYN28-12 delivery?

Standard KYN28-12 models ship within 15–20 working days. Custom protection configurations require 25–30 working days. We maintain in-stock VCB components and 8MF frame assemblies to shorten your delivery timeline for urgent projects. → Contact us for delivery schedule

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KYN28-12 Armored Withdrawable Type AC Metal-Enclosed Switchgear

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