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Clause 5.5 Ground Pads.
Does part of this section refer to the ground pads on the lower exterior walls
of the transformer tank and another part refer
specifically to ground pads on the top of the tank? Or does 5.5.1 refer to pads
on the exterior walls of the tank, and 5.5.2 and 5.5.3 refer to pads on top
of the tank?
Clause 5.5 of the IEEE Std C57.12.10-1997 defines the specific construction,
location, and quantity of tank ground pads. Clause 5.5.1 describes how the pad
shall be constructed and attached to the tank. Clause 5.5.2 describes the quantity
and location of the pad for transformers 2500 kVA and smaller, while clause
5.5.3 does the same for the two pads required for transformers larger than 2500
kVA. These pads shall be located near the base, per clause 5.5.1. All other
ground pads are specified by the user. For example, ground pads for surge arresters
can be specified by the user per clause 9.12 or per the user's own requirements.
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