Hubbell 2210 specifications Hubbell Industrial Controls, Inc, General Information, Application

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. NEMA TYPE 3/13 ENCLOSURE

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.

NEMA TYPE 7, 9 OR 10 ENCLOSURE

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.