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2210
User Manual
2 pgs399.7 Kb0

Hubbell 2210 User Manual

Hubbell Industrial Controls, Inc.
EUCLID TYPE C/MEDIUM - HIGH SPEED/CENTRIFUGAL
General Information
•
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.
SPECIFICATIONS
2210
Feb. 1977
Replace: June 1972
SPEED RESPONSIVE SWITCH
Application
Type C switch provide overspeed & under­speed 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 compart­ment. The standard molded housings are resistant to most acid, alkali and salt com­pounds.
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 enclo­sures have accurately machined cast alumi­num 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 haz­ardous 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 link­age system (mounted in a separate com­partment 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 link­age 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 re­quired and, because the main shaft bearings are permanently lubricated, no access should be needed into the flyweight compartment into the flyweight compartment for servicing.
-
-
-
Brass inserts molded into the flyweight housing retain the 2 shaft bearings.
Speed Adjustment - Speed points at which contacts operate are easily adjustable in the field within the standard operating ranges. Switches are factory-set at minimum as­cending speeds as listed in the Price List
2210. Other contact settings may be speci­fied as an option. EACH SET OF SNAP­ACTION INDEPENDANTLY ADJUSTABLE FROM THE REAR WHILE THE SWITCH IS ROTATING. Also the speed setting of both sets of contacts can be changed at the same time by varying the tension on the adjustment spring with the adjustment nut. Turning the spring adjustment nut or the contact adjust­ment screws in a clockwise direction will cause the contacts to operate at a higher speed, but making these adjustments in a counter-clockwise direction will cause the contacts to operate at a lower speed.
Contact - The contact compartment provides several basic contact-making means as re­quired for various applications. Slow-action butt-type bridging contacts for rapid speed­change conditions or snap-action contacts for slow speed changes can be supplied.
MAXIMUM CONTACT INTERRUPTING RATINGS
TYPE OF
CONTACT
*SLOW ACTION
Non Directional
(Butt-Type)
*SLOW ACTION
Directional
(Butt-Type)
*SNAP ACTION
*SNAP ACTION
* Rating based on a min. of 1/32" contact gap.
AMPERES
AC 35% PF
120v 240v 480V 125v 250v
3 15 .75 .75 .35
3 1.5 .75 .25 .12
AC Type
……… .60 .25
DC Type
DC
INDUCTIVE
One set or two sets of normally open and/or normally closed single-throw contacts … each set independently adjustable … are available in the slow-action type. One set or two sets of normally open and normally closed single-pole, double-throw, snap-action switches are also available with each set independently adjustable.
These two separate sets of contacts can be adjusted for operation at different speeds so that two separate operations can be con­trolled from one speed sensitive switch. Therefore, it is possible to perform two differ­ent functions at two different speeds.
A directional sensing form of the switch em­ploys slow-action butt-type bridging contacts in normally open position only.
Type C Centrifugal Switches are available for operating in various speed ranges of adjust­ment between 10 and 4700 RPM on in­creasing speed. The specific range of ad­justment that is selected determines the fly­weight assembly and the adjustment spring that is used.
The contact adjustment ranges of centrifugal switches with 2 contacts (shown in the table of the price list) are for both contacts operat­ing simultaneously. The 2 contacts can be adjusted independently, however, that opera­tion changes the adjustment range from that shown.
The ranges of adjustment listed are for switches mounted horizontally. Vertically mounted switches with the shaft extension down have different ranges of adjustment. A special wide range adjustment can be sup­plied on special order.
The recommended maximum running speed of a switch with heavy flyweights is 1800 RPM, with medium flyweights is 4000 RPM and with light flyweights is 5000 RPM.
OPTIONAL FEATURES
Manual Reset - When specified, EUCLID
Type C Centrifugal Switches can be fur­nished with one or two manual reset buttons (one for each set of A-C precision contacts). A metal guard prevents accidental damage to the buttons by impact. The Code Letter "M" designates one set of manually reset A-C snap-action contacts.
Flexible Couplings - A Flexible Coupling should be used to connect the Centrifugal Switch shaft to customer's shaft in order to compensate for minor misalignment of the shafts. Couplings can be supplied with a 1/2", 5/8" or 3/4" bore for customer's shaft and a 5/8" bore for our shaft. Standard key­ways can be furnished. Specify by catalog number on Price List 2210.
Magnetic Vibration Dampeners - counter­acts destructive action of the "dither". Spec­ify by catalog number on Price List 2210.
Air Valve Actuating - Type AV, air valve instead of electrical contacts for pneumatic systems. Refer to factory with application data.
Speed Increaser - 3 to 1 ratio can be mounted at the factory which permits the input shaft speed of the speed increaser to be 1/3 the normal input shaft speed. Specify by suffix number "S" for Single Speed In­creaser and "SS" for Double Speed In­creaser. Refer to Price List 2210.
Hubbell Industrial Controls, Inc.
A subsidiary of Hubbell Incorporated
4301 Cheyenne Dr., Archdale, NC. 27262
Telephone (336) 434-2800 • FAX (336) 434-2803
http://www.hubbell-icd.com
Sales@hubbell-icd.com
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