Scope
1.1
This Standard specifies the requirements for distribution transformers
intended primarily for operation by electric utilities.
Note: The operation of transfor.mers 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: temperature 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.
