Howard Network Transformers - Manual (Page 3)

Catalog Section 94-10
Network Transformers
Issued: April 9, 2010
Howard Industries, Inc.
Laurel, MS 39440
www.howardtransformers.com
Copyright © 2010 Howard Industries, Inc.
3
Network Transformer
94-10
High-Voltage Switch and Terminal Chamber
The high-voltage switch is a fl uid-immersed rotary type
switch located in the high-voltage switch chamber, with
an adjacent terminal chamber located above. An optional
single-chamber design is available. The switch has three
operating positions, OPEN, CLOSED, and GROUND, clearly
indicated on the switch indicator plate. A mechanical
stop is provided to prevent unintentional operation of the
switch and to allow an electrical interlock to prevent op-
eration if the transformer is energized. Several different
types high-voltage cable entrances are available.
Network Protector Provisions
A secondary throat and support brackets are provided on
the low-voltage termination side of the tank that are suit-
able for mounting a low-voltage network protector.
Table 1: Factory Testing
Figure 2: High-Voltage Switch and Terminal Chamber
Figure 3: Network Protector Provisions