| The modular nature of
Duraline's distribution systems for electrical resistance heat
treating applications provides the maximum in flexibility of choice
and economy in use. While some
assemblies can be combined or intermixed to create new systems,
certain parameters must be observed to ensure that a functionally
safe, economical, and efficient system is obtained:
1. The U.S. Navy 3 and 4
wire system configurations are not variable from
the Bureau
of Ships standard;
2. Commercial percentage
timer systems may be specified with differing
output
receptacles and power streamer plugs for multiple applications
or
dedicated system at one site.
3. The Factory Mutual
thermostatically controlled system is completely
FM
approved. Input cables may be furnished up to 100 feet long on the
6-outlet distribution block, and up to 50 feet long on the 4-outlet
main
panel. The optional panel mount receptacle, model 30FR4X, intended
for
main power input, is the latest addition to the system and provides
additional flexibility
and convenience for the system end user.
4. Both the CBI and JBB type
commercial systems add the capability of
using 72 inch
thermostatically controlled heaters by incorporation a
primary spider in
place of the 3B20-6SR FM distribution block.
Accordingly, the
system may be configured using either the primary
spider or the 6
outlet distribution block. The primary spider must be
used if 72 inch heaters will
be used in the system.
5. Primary spiders (3
phase to single phase) must have 3 legs for phase
balance.
Secondary spiders (single phase) can have 2 or 3 legs. Length
of cable can be
up to 100 feet. per spider
(overall length)
|
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