KYN28-12 Key Applications & Operating Conditions
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. La nueva aparamenta de alta corriente y alta ruptura introducida y desarrollada también puede utilizarse por separado como toma de generador de alta tensión.
Este producto cumple las normas: 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 |
| ↓ | ↓ | ↓ | ↓ | | ↓ | ↓ |
| Tipo blindado metálico | Tipo de cambio | Interior | Número de secuencia del diseño | | Tensión nominal (KV) | Interruptor de vacío |
Installation & Operating Conditions
- Temperatura ambiente del aire: temperatura máxima +40℃ , temperatura mínima -15℃ ;
- Humedad relativa: humedad relativa media diaria: ≤ 95%, la presión media diaria del vapor de agua no supera los 2,2KPa; Humedad relativa media mensual ≤ 90%; La presión media mensual del vapor no supera los 1,8KPa;
- Altitud: ≤ 1000m;
- Intensidad sísmica: no superior a 8;
- El aire circundante debe estar libre de gases corrosivos o inflamables, vapor de agua y otras contaminaciones evidentes;
- No hay lugar para vibraciones violentas;
- Cuando se utilice en condiciones normales más allá de GB3906, el usuario y la empresa deberán negociar.
KYN28-12 Technical Specifications & Rated Parameters
| Parámetro | Unidad | Valor |
| Tensión nominal | KV | 3.6、7.2、12 |
| Frecuencia nominal | Hz | 50 |
| Corriente nominal del disyuntor | A | 630、1250、1600、2000、2500、3150、4000 |
| Corriente nominal de la aparamenta | A | 630、1250、1600、2000、2500、3150、4000 |
| Corriente nominal de corta duración (4 s) | KA | 16、20、25、31.5、40、50 |
| Corriente nominal de pico soportada (valor de pico) | KA | 40、50、63、80、100、125 |
| Corriente nominal de corte en cortocircuito | KA | 16、20、25、31.5、40、50 |
| Corriente nominal de cortocircuito (valor pico) | KA | 40、50、63、80、100、125 |
Rated
Aislamiento
Nivel | 1min Potencia Frecuencia
Tensión soportada
Rated | Fase a fase, fase a tierra
Lagunas | KV | 24、32、42 |
| KV | 24、32、48 |
Impulso del rayo
Tensión soportada
(Pico) | Fase a fase, fase a tierra
Lagunas | KV | 40、60、75 |
| KV | 46、70、85 |
| Grado de protección (IP) | | IP4X |
Preguntas frecuentes
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