MA-005 - Minitrans Installation Manual - Rev 4.5
13-Aug-20
Page 54 of 86
Appendix L
Direct Mount Cradle Installation
L.1
Purpose and Scope
The purpose of this appendix is to provide a detailed description of how to install the
product onto a transformer using the
‘GE
Direct mount cradle
’
(Figure L-1) in the
following scenarios:
▪
Standard installation
—
at a new mounting location where a product is to be installed.
▪
Retrospective installation
—
at a mounting location where an existing product is
installed without such a cradle.
Figure L-1: Direct mount cradle
This appendix does
not
attempt to give detailed instruction on the following activities:
▪
Removal of the product or any of its components.
▪
Draining of oil from the product.
▪
Removal of pipes or plumbing components.
▪
Removal of any welded studs that join the product to the transformer.
▪
Removal of any bespoke apparatus that presently acts as a vibration isolation system.
▪
Removal of power, communications or other electrical cables.
▪
Powering down the product, backing up or downloading data etc.
▪
Preparing a product with a direct mount cradle for transit in a mobile substation. For
that scenario, please contact the Customer Service Centre.
L.2
Important Considerations
The primary earth must be installed
. Since the silicone isolators of the
cradle lock provide a degree of electrical isolation from Ground, this highlights
the importance of installing the primary earth (see Section 9.1).
▪
[
In a retrofit scenario only
.] If welded threaded studs are being used instead of M6
bolts to mount the product to the transformer through the
product’s
lugs, and those
