Key points when sourcing medium-voltage switchgear
From build standard to acceptance testing, what to know when ordering MV switchgear.
Medium-voltage switchgear is the heart of energy distribution in large industrial units. Sourcing it incorrectly is not only expensive, it also puts operator safety at risk.
Standards compliance
The switchgear must be built and tested to recognised standards such as IEC 62271. Type-test certificates from the manufacturer are the first thing to request.
Matching the network
Voltage level, busbar rated current, and breaker breaking capacity must match the network at the point of installation. This data is usually defined in the project single-line diagram.
Protection degree and environment
- An ingress-protection (IP) rating suited to the installation environment
- Provisions for dust and humidity in industries such as cement and steel
- Ventilation and temperature control where required
Delivery and commissioning
Pre-delivery inspection and commissioning tests prevent faults in the first days of operation. Sourcing from a reputable supplier makes access to these services easier.