Double Plunger Pushbutton Switches

DOUBLE PLUNGER
PUSHBUTTON SWITCHES

	DEFINITION
	A pushbutton switch is a mechanical device used to make and/or break one or more electrical circuits. They are designed to be solely operated by human hands.
	OPERATION
	These double plunger switches have contact arrangements from one normally open and one normally closed contact to two normally open contacts plus two normally closed contacts. By pushing the plunger (by hand) the contacts will change state and either start or stop the circuit they are connected to. When the plunger is released, the contacts of the momentary style switches will return to their normal at rest state. The maintained and latching style will stay as pushed until the other plunger is pushed or the latch is released and then the plunger is pushed returning to its normal position. The latching style shown will accept a padlock with a 0.313" dia. or smaller hasp. Another type shown is the key to lock plunger in the depressed position and then turning the key back again to release the plunger.
	SELECTION
	The selection and use of a push button switch involves knowing the details of the particular installation. The following questions must be answered in order to make the proper selection. Does a circuit need to be made and/or broke? Are there multiple circuits? What color plunger is necessary or requested? What style plunger is necessary? Does the button need to be guarded from unintentional operation? What is the switch environment? (Exposed to weather?)

INSTALLATION

Every installation is unique, therefore there are only a very few hard and fast rules to follow. Above all, observe all safety requirements, procedures, and local codes. To mount these devices it will be necessary to have a suitable enclosure. These are available from REES or they will mount on Condulet© "FS" style cast enclosures. If the switch is to be mounted on a larger enclosure, the required switch mounting information can be found with dimensional drawings at the end of this section in the REES specifier's guide. On pages 28 through 33 you will find almost thirty different models of double plunger pushbutton switches that should satisfy any installation requirements. In the fourth section of this catalog you can find a number of accessory items to facilitate in the installation or operation of these switches. All mechanical devices, these switches included, will wear out and eventually need to be replaced. The estimated minimum mechanical life is 500,000 operations. Regular scheduled preventative maintenance inspections are strongly recommended for these switches. Some items to look for are:

Physical damage to the switch
Loose connections or components
Broken or weak springs
Burnt or very worn contacts

REES pushbutton switches are designed and manufactured to surpass the minimal standards of industry. On the facing page is a brief look at some of these regulations and how our switches conform. The testing done by independent facilities is the minimum requirement that the REES switches far exceed. If other assistance is desired, please contact the factory.

Index

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