Electrical network transformer
300 - 2.500 kVA
GE Digital Energy
Network TransformersGE's Network Transformers are constructed to provide economy, flexibility & reliability for network systems and meet stringent underground installation requirements. GE's Network Transformers are designed to supply power to the network bus and handle significant short-term overload. Cities rely on General Electric Network Transformers to provide reliable and dependable electrical service to their customers.
Network systems are designed based on redundant facilities so that any single equipment failure will not result in service outage on the network. Network transformers typically supply power to secondary grid-type systems in densely populated cities. The transformers are designed for submersible operation but are also frequently used in dry vaults or inside buildings. Vault-type transformers are designed for occasional submersion and Subway type transformers are designed for frequent or continuous submerged operation. A Commercial Subsurface Transformer (CST) is similar to a Pad-type transformer but is designed for continuous (subway) and occasional (vault) submersion.
Each network is served by at least two primary feeders and the network unit consists of a high-side disconnect or grounding switch, a network transformer, and a network protector (with master relay, phasing relay, and fuses). The primary network voltage classes range from 5 kV to 35 kV. Typical 3-phase network transformer sizes are 300, 500, 750, 1,000, 1,500, 2,000, and 2,500 kVA. The transformers are liquid-filled with a variety of insulating fluids. The transformer impedance typically ranges 4%-7% but other impedances are possible.
