2500KVA HERMETICALLY SEALED TRANSFORMERS . This power transformer is best used for PLN power permits above 1600KVA. for transformer specifications: Transformer type OLI 3P 2500KVA 20kv/400v 50 Hz Dyn5, Indoor installation is equipped with transformer protection that is connected to a 20KV switch device called CUBICLE 20KV. TRANSFER SWITCHES