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Full Description

This PDF includes GI #2.

1. Scope

1.1

This Standard specifies the requirements for distribution transformers intended primarily for operation by electric utilities. Note: The operation of transformers complying with this Standard, by other than an electric utility, may be subject to additional requirements by the electrical inspection authority having jurisdiction under Part I of the Canadian Electrical Code.

1.2

This Standard applies to single- and three-phase, 60 Hz, liquid-filled, distribution transformers, Types ONAN and LNAN, rated at 1000 kV?A or below for single-phase and at or below 3000 kV?A for three-phase, insulation class 34.5 kV and less.

1.3

This Standard includes voltage ratings, kV?A ratings, certain mechanical characteristics, and test procedures. Also included are the following performance characteristics:

te mperature rise, loading capabilities, sound level, and radio influence voltage (RIV).

1.4

This Standard also applies to self-protected transformers, except for the protective equipment.

1.5

Except as specified by other CSA Standards this Standard does not apply to auto-, testing, dry-type, welding, furnace, rectifier, network, pad-mounted, subway-type, or special-purpose transformers, or to step-voltage regulators.

1.6

Transformers built in accordance with this Standard shall meet the quality requirements of CSA Standard CAN3-Z299.3.