Hubbell 2210 - Manual

SPECIFICATIONS
2210
Feb. 1977
Hubbell Industrial Controls, Inc.
Replace: June 1972
SPEED RESPONSIVE SWITCH
EUCLID TYPE C/MEDIUM - HIGH SPEED/CENTRIFUGAL
General Information
Type C Speed Responsive switches assure
maximum protection of material handling
systems and rotating equipment. They pro-
vide overspeed and underspeed protection
with precise speed sensing and highly re-
petitive accuracy. These switches have
excellent repetitive accuracy and are basi-
cally unaffected by temperature variations.
• NEMA Type enclosures for indoor,
outdoor & hazardous environments.
• Contacts easily adjustable while run-
ning.
• High-speed operation to 4700 RPM.
• Low-speed operation from 10 RPM.
• Snap-Action or Slow-Action contacts, or
pneumatic valve.
• Oversize bearings providing low-friction.
• Surface or flange mounting.
• 5/8" dia. input shaft & rugged construc-
tion.
• ± 5% repeatability.
Application
Type C switch provide overspeed & under-
speed protection and precise speed sensing
with highly repetitive accuracy to indicate
slipping or broken conveyor belts, preventing
material pileups … prevent overspeed of
motors, generators, fans & pumps … control
starting of diesel engines … prevent damage
to rotating industrial machinery when speeds
increase or decrease from safe values … for
plugging applications to assure quick & safe
stops … sequential control of functions at
specific speeds.
Description
Housing & Enclosures - Standard Type C
centrifugal switch housings are molded of
tough fiberglass reinforced polyester resin,
for the flyweight compartment and a cast
aluminum housing for the contact compart-
ment. The standard molded housings are
resistant to most acid, alkali and salt com-
pounds.
When flange mounting is specified, the flange
and the flyweight section of the housing are
precisely machined from a single aluminum
casting.
Adaptation can be provided to meet special
mounting requirements.
NEMA Type 3/13 enclosures are supplied for
indoor/outdoor industrial applications.
NEMA Type 4 enclosure (water-tight) for
indoor/outdoor applications with a double
shaft seal & grease fitting for lubrication and
purging as standard equipment ensuring
longer bearing life.
NEMA Type 7, 9 and 10 explosion proof
enclosures are available also. These enclo-
sures have accurately machined cast alumi-
num housings, either surface mounted or
flange mounted. The NEMA Type 7 and 9
housings are designed in accordance with
specifications for switches in Class 1 Group
C or D and Class 2 Groups E, F and G haz-
ardous locations. NEMA Type 10 enclosures
have been certified by the Bureau of Mines
as meeting the requirements of Schedule 2G
for explosion-proof construction. File No.
X/P-943 has been assigned to those EUCLID
switches. Use this reference when specifying
Euclid.
Flyweight System - The flyweight and link-
age system (mounted in a separate com-
partment from the contacts) is completely
suspended on the 3/4" square part of the
stainless steel shaft by 8 bearings. The
bearing suspension of the flyweight and link-
age system provides a very low-friction
means of transmitting the centrifugal force
through a small concentric shaft to the switch
contact compartment. The shaft is supported
by 2 oversize ball bearings. No lubrication of
the ball-bearing suspension system is re-
quired and, because the main shaft bearings
are permanently lubricated, no access should
be needed into the flyweight compartment
into the flyweight compartment for servicing.
NEMA TYPE 3/13 ENCLOSURE
NEMA TYPE 7, 9 OR 10 ENCLOSURE