Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

more free publications

Materials

Design

Processes

Units

Formulas

Math
A relay is an electrically operated switch. Although other operating principles are possible, many commercially available relays use an electromagnet to operate a switching mechanism mechanically. Relays are widely applied to two situations:
  • When it is necessary to control a circuit by a low-power signal with complete electrical isolation between control and controlled circuits.
  • When several circuits must be controlled by one signal.
Today, telephone exchange instruments are probably the most extensive users for relays.

Common relay types include

  • Latching relay
  • Reed relay
    • 2.2.1 Mercury-wetted relay
  • Polarized relay
  • Machine tool relay
  • Contactor relay
  • Solid-state relay
  • Solid state contactor relay
  • Buchholz relay
  • Forced-guided contacts relay
  • Overload protection relay
Note that since relays are essentially special switches, the terminology applied to switches is also applied to relays. A relay will switch one or more poles, each of whose contacts can be thrown by energizing the coil in one of three ways: Normally-open (NO), Normally-closed (NC), and Change-over (CO) (double-throw (DT))
 4 companies matched 
ATO Relays
  single phase or three phase AC solid state relays SSR electromagnetic relays EMR digital or analog time delay relay DC / AC monitoring relay , 
Brass Electrical Components Anchor fasteners
electrical Brass components Brass Anchor fasteners Brass Nuts Brass Anchors Brass turned parts Brass components cable glands
Conex Brass Parts Brass Components
Brass Screws Brass Parts Brass turned components Brass anchors Brass hose fittings Brass Inserts Brass turned parts Brass insert Brass cable glands Brass Screws Brass fasteners
FUDA ALLOY MATERIALS CO.,LTD.
 contact materials, multi-layer contacts, and contact components
Glossary
FREE Publications
Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

more publications