2.6.3
Substation Transformer
**************************************************************************
NOTE: Where single-phase transformers or aerial
secondary connections are required, use substation
transformer. Where contrary to criteria for new
substations, their usage must be justified.
**************************************************************************
Substation transformer shall comply with the requirements for power
transformers in paragraph SUBSTATION EQUIPMENT.
2.6.4
Articulated Primary Unit Substation
**************************************************************************
NOTE: Normally, specify articulated primary unit
substations for incoming nominal line voltages of 35
kV or less.
**************************************************************************
Articulated primary unit substation shall comply with ANSI C37.121 and
shall be of the outdoor [radial] [secondary-selective]
[distributed-network] [spot-network] [duplex] type.
2.6.4.1
Incoming Section Equipment
Incoming section equipment shall comply with the requirements [for
Metal-Enclosed Interrupter Switchgear in paragraph INCOMING
SWITCHING/CIRCUIT INTERRUPTING EQUIPMENT.] [in paragraph OUTGOING
METAL-CLAD SWITCHGEAR.]
2.6.4.2
Transformer Section Equipment
Transformer section equipment shall comply with the requirements for power
transformers in paragraph SUBSTATION EQUIPMENT. Primary and secondary
equipment connection provisions shall be suitable for direct connection to
the specified incoming and outgoing switchgear.
2.6.4.3
Outgoing Section Equipment
Outgoing section equipment shall comply with the requirements of paragraph
OUTGOING METAL-CLAD SWITCHGEAR.
2.6.5
Metal-Enclosed Bus
**************************************************************************
NOTE: Metal-enclosed bus may be necessary between
the transformer section and outgoing section for a
primary unit substation or where the incoming line
section of an articulated primary unit substation is
located remote to the power transformer. Provisions
for Articulated Primary Unit Substation and
Metal-Enclosed Bus in paragraph SUBSTATION EQUIPMENT
should be modified as required. Industry standards
for continuous, self-cooled, metal-enclosed bus
ratings are listed in ANSI C37.23.
**************************************************************************
Metal-enclosed bus shall have ratings that equal or exceed the ratings of
SECTION 16311A
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