Requirements for installing transformers in energy storage power stations

Is a minimum distance between a transformer and a substation mandatory?

Surprisingly, there are no prescriptive mandatory national statutes requiring minimum distances between transformers and substations. On the one hand, the authors share the opinion that compliance with mandatory codes and standards is a must.

How much air does a transformer need?

When transformers are located in rooms or other restricted spaces, sufficient ventilation should be provided to hold the air temperature within established limits when measured near the transformer inlets. This will usually require approximately 3 m3/min of air per kilowatt of transformer loss.

What temperature should a transformer be rated at?

The temperature should not exceed 110 oC (230 oF) to prevent damage to the transformer’s insulation. Finally, before placing in service, check the operation of fans, motors, relays, and other auxiliary devices. Verify the selection of taps and ratio connections, and double check the tightness and clearance of all electrical connections.

Where should a transformer be installed?

To minimize sound transmission to surrounding structures, it is recommended that the transformer be installed away from corners, walls, or ceilings. For installations that must be near a corner, sound absorbing materials can be used on the walls and ceiling.

What is the minimum spacing for mineral insulating liquid type transformers?

For mineral insulating liquid type transformers, the information in Table 5 closely matches IEEE Std. 979, Table 1 and NFPA 850, Table 5.1.4.3 , but it also includes a minimum 15-foot spacing for transformers with less than 500 gallons of oil.

What is a minimum efficiency level for a distribution transformer?

Minimum efficiency levels have been established for low-voltage dry-type distribution transformers when loaded at 35 percent of their full load capacity, and for oil-based and medium-voltage dry-type transformers at 50 percent loading.