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4211
Specifications
The Euclid Mini-Master
Switch uses a handle oper-
ated cam switch mechanism
in a NEMA rated housing.
It is engineered for use
where master switch control
is preferred, for CMAA duty
overhead crane and similar
applications.
• Housings for surface or
flush mounting.
• NEMA Types 1, 3, 4
and 13.
• Very compact size.
• Choice of spring return
vertical handle or main-
tained position vertical
handle.
• Plunger detents give
operator “positive
position feel.”
• Heavy-duty, cam-operated
switch units.
• Up to 5–speed points in
each direction.
• Up to 16 circuits plus
feed for each direction
provide unlimited opera-
tion sequences.
• Jam-proof mechanism for
contact protection.
Application
Euclid Mini-Master Switches are
engineered to meet the need for
a small, multi-circuit master
switch for installations such as:
small crane cabs, and mill
auxiliaries.
Description
The operating head is molded
of tough fiberglass reinforced
polyester resin. The housing is
engineered for extra strength
and impact resistance. The
stainless steel operating rod has
a 1
1
⁄
8
" diameter tough plastic
knob. The lever is supported
within the operating head by
oil-impregnated bushings. The
operating mechanism within the
head is comprised of precision
machined components carefully
assembled and tested to assure
a long, trouble-free service life.
The enclosure to which the
head is fastened is a die-
formed metal stamping. On
NEMA 1 housings, two
3
⁄
4
"
knockouts are supplied. The op-
erating head is gasketed for
sealing to the enclosure or cus-
tomers panel on flush mounting
switches.
The cam-operated inserts are
similar to those used with type
PBC & WPBC pushbutton sta-
tions, with the following modifi-
cations: The operating plungers
are glass-fibre reinforced plastic
with a special lip overhang to
interlock with the operating le-
ver. Plungers are also equipped
with location detents, corre-
sponding to the cam develop-
ment and speed points. This
feature provides the operator
with a “positive position feel.”
Mini-Master Switch
Stepless Mini-Master
Switch
440/428-1161 • Fax 440/428-7635
18
HUBBELL