Transformer Room Requirements

Transformer room with fire resistant construction or must be installed in a transformer vault.

Transformer room requirements.

Conventional panelboard transformer room layout. For example look at the requirements for dry type transformers. Your transformer vault requirements. 3 the installation complies with all restrictions provided for in the listing of the liquid.

Containment pan curbing room containment e g door sill 2 the transformer be filled with a listed less flammable insulating liquid with a minimum of 300 c fire point. Floor space dedicated for this conventional layout employing panelboards and a transformer shown is 90 75 ft2 8 43 m2. Some definitions and requirements of these standards such as csa c88 m90 ieee c57 12 00 and iec 60076 are different. If these are not over 112 kva they need a separation at least 12 in.

From combustible material unless separated by a fire resistant heat insulated barrier. Dry type transformers installed indoors. The nec also requires 3 to 4 1m to 1 3m of aisle space between live electrical components of 600 volts or less depending on whether live components are on one or both sides of the aisle. Figure 1 depicts a conventional electrical room layout where spacing is consistent with basic nec clearance requirements.

A standard transformer with 220 c insulation and a 150 c temperature rise will be rated to run full load in an average 30 c ambient environment over 24 hours with a maximum 40 c ambient temperature. The following have different explanations in these standards. Typical transformer vault space require ments depend on the number of transformers required to supply electricity to your build ing. Components are mounted individually on the wall.

Other magnetics may have lower or higher ambient ratings depending on the design and application. This requirement holds even if components are protected by safety enclosures or screens. Transformers with class b insulation 80 c temperature rise or class h insulation 150 c temperature rise need not be installed in a transformer vault provided they are separated from combustible material. Search for your solution.

Many specifications list a number of transformer standards and make a statement in the specifications that the transformers must meet these standards. 4 4 3 the 11kv switchgear foundation shall be capable of supporting a maximum static plus dynamic load of 17kn per panel. Actual plinth size is subjected to the transformer rating and type.