{"id":5722,"date":"2026-07-28T09:00:00","date_gmt":"2026-07-28T09:00:00","guid":{"rendered":"https:\/\/honcon-electric.com\/?p=5722"},"modified":"2026-07-27T07:28:16","modified_gmt":"2026-07-27T07:28:16","slug":"24kv-metal-clad-switchgear-indonesia","status":"publish","type":"post","link":"https:\/\/honcon-electric.com\/es\/24kv-metal-clad-switchgear-indonesia\/","title":{"rendered":"24kV Metal-Clad Switchgear for Indonesia"},"content":{"rendered":"
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24kV Metal-Clad Switchgear for Indonesia’s 20kV Power Distribution Systems<\/h2>

Indonesia continues to expand its power infrastructure to support industrial development, mining, commercial facilities, renewable energy, and urban construction. As new projects are connected to medium-voltage distribution networks, selecting reliable switchgear becomes an important part of ensuring system safety and operational continuity.<\/p>

A common question from overseas EPC contractors is why Indonesia’s 20 kV distribution networks typically use 24 kV metal-clad switchgear. The answer lies in the standardized rated voltage classes defined in IEC 62271<\/a>. Although the system operates at 20 kV, 24 kV is the commonly specified equipment class for this application, providing the electrical insulation performance required for medium-voltage distribution systems.<\/p>

For EPC contractors and industrial project owners, understanding this distinction is essential when selecting medium-voltage equipment for new installations or system upgrades.<\/p>

Understanding 24kV Metal-Clad Switchgear<\/h2>

Metal-clad switchgear is a type of indoor medium-voltage switchgear in which the major electrical components are installed in separate grounded metal compartments. This compartmentalized construction improves personnel safety, facilitates maintenance, and limits the propagation of internal faults.<\/p>

A typical 24kV metal-clad switchgear<\/a> assembly consists of:<\/p>

Busbar Compartment<\/h3>

Contains the main copper busbars that distribute power throughout the switchgear lineup.<\/p>

Circuit Breaker Compartment<\/h3>

Houses a withdrawable vacuum circuit breaker, allowing maintenance or replacement without dismantling the entire panel.<\/p>

Cable Compartment<\/h3>

Provides space for incoming and outgoing cables, current transformers (CTs), voltage transformers (VTs), surge arresters (where required), and cable terminations.<\/p>

Low-Voltage Compartment<\/h3>

Contains protection relays, metering devices, control circuits, and communication equipment, separated from the medium-voltage compartments for improved safety.<\/p>

Why 24kV Equipment Is Selected for 20kV Systems<\/h2>

A common question from overseas buyers is why projects operating at 20kV<\/strong> specify 24kV metal-clad switchgear<\/strong>.<\/p>

The reason is that 24kV refers to the equipment’s rated voltage class rather than the normal operating voltage of the electrical network<\/strong>. Under IEC 62271, medium-voltage switchgear is classified according to standardized rated voltage levels. For 20kV distribution systems, 24kV equipment is commonly selected to meet the applicable insulation and dielectric performance requirements.<\/p>

This approach is widely adopted in many IEC-based power systems, including projects in Indonesia.<\/p>

Typical Technical Considerations for Indonesia Projects<\/h2>

Although each project has its own specification, engineers generally evaluate the following parameters when selecting metal-clad switchgear:<\/p>

Parameter<\/th>Typical Consideration<\/th><\/tr><\/thead>
System Voltage<\/td>20kV<\/td><\/tr>
Equipment Rated Voltage<\/td>24kV<\/td><\/tr>
Frecuencia<\/td>50Hz<\/td><\/tr>
Corriente nominal<\/td>Determined by load requirements<\/td><\/tr>
Short-Circuit Withstand Current<\/td>Determined by system fault level<\/td><\/tr>
Circuit Breaker<\/td>Vacuum Circuit Breaker<\/td><\/tr>
Applicable Standard<\/td>IEC 62271 Series<\/td><\/tr><\/tbody><\/table><\/div><\/div>

The final ratings should always be determined according to the project’s electrical studies and technical specifications.<\/p>

Applications of 24kV Metal-Clad Switchgear in Indonesia<\/h2>

Because of its flexibility and high reliability, 24kV metal-clad switchgear is widely applied in medium-voltage distribution systems serving:<\/p>