Howard HI-104 Single-Phase Pad Transformer - Manual (Page 27)

Document 2.4.96, Revision 0
March, 2013
27
Single-Phase Pad-Mounted Compartmental-Type Distribution Transformers
sure the cabinet is secure and tamper
proof. Make sure the transformer and sill
are sitting flush on the mounting pad with
no gaps that might allow entry of a foreign
object into the terminal compartment.
Double-Door Terminal Compartment
The double-door style pad-mounted transformer is
designed with a terminal compartment consisting of
a terminal compartment cover, two hinged doors and
a base sill. The secondary-side door can be opened
by removing the padlock, disengaging the penta-
head security bolt and rotating the door handle. The
primary-side door may be fastened with one or more
security bolts, which must be disengaged to open the
door. Latch rods located at the bottom of each door
can be used to secure doors in the open position.
The double-door style pad-mounted transformer may
also be equipped with a flip-top terminal compart-
ment cover, which can be raised to facilitate opera-
tion of the optional Bay-O-Net fuse and to provide
clearance for pulling cables into the terminal com-
partment. To open the cover, disengage the center
security bolt and rotate the cover upward. A latch is
provided to secure the cover in the open position.
Lift-off door hinges are provided on double-door style
pad-mounted transformers, so that the compartment
doors can be removed when in the open position.
Before leaving the installation site, make sure the
terminal compartment is closed and secure, using
the following procedure.
− Close the flip-top cover, if present.
− Close the primary compartment door and
engage each security bolt.
− Close the secondary compartment door
and turn the handle to the closed posi-
tion. Fully engage the secondary compart-
ment door security bolt.
− Install a suitable heavy-duty padlock.
− Carefully check the transformer to make
sure the cabinet appears to be secure
and tamper proof. Make sure the trans-
former and sill are sitting flush on the
mounting pad with no gaps that might
allow entry of a foreign object into the
terminal compartment.
Other Accessory Devices
Transformers may be provided with accessory devic-
es not discussed in these instructions. In such cases
contact the Howard Industries Transformer Division if
additional information is needed.