How does a 3 phase solid state relay work?
The output of each solid-state relay is connected between one of the three phases of the three-phase network and the load being controlled, such as a resistive heating element. If the power controller uses three independent solid-state relays, then the input terminals of those relays are typically wired in parallel.
How do you size a solid state relay?
When selecting a Solid State Relay, consider: Current rating, as a general rule consider using the relay at no more than 70% of its rated current. Electrical environment,. i(In harsh electrical environments, consider a relay with an line voltage rating above the application line voltage.)
How much current does a solid state relay draw?
Packaged solid-state relays use power semiconductor devices such as thyristors and transistors, to switch currents up to around a hundred amperes. Solid-state relays have fast switching speeds compared with electromechanical relays, and have no physical contacts to wear out.
When would you use a solid state relay?
A solid state relay is ideal when fast, frequent switching is required. For example, precision temperature control of an industrial oven might require switching off the mains supply to the heating elements every two or three seconds.
What is the difference between electromechanical and solid state relays?
An electromechanical relay uses physical contacts for switching. An SSR uses semiconductor devices such as TRIAC, Thyristors, MOSFETs and transistors. Relay contacts gets eroded during prolonged switching. SSRs do not have mechanical contacts.
Who uses solid state relays?
AC output solid state relays are used to control the flow of electrical energy in alternating current power systems. The control (equivalent to electro-mechanical relay coil) voltages can be either AC or DC.
What are the benefits of using a solid state relay instead of an electromechanical relay?
One of the biggest advantages of solid state relays over an electromechanical relay is its ability to switch “OFF” AC loads at the point of zero load current, thereby completely eliminating the arcing, electrical noise and contact bounce associated with conventional mechanical relays and inductive loads.
Is the ssr-100aa a 3 phase relay?
Low cost and high quality SSR-100AA, 3 phase solid state relay, 100 Amp load current, AC control AC, input voltage 70-280V AC, load voltage 24-480V AC, LED indicator, panel mount, high reliability and good performance.
What kind of AC is a solid state relay?
100A 3-phase solid state relay (SSR) can control 24-480V AC load with 70-280V AC with high structural strength, good impact resistance, and strong shock resistance.
What can a SSR relay be used for?
The SSR relay offers a reliable switching the commercial and industrial loads, such as computer peripheral interface device, printing machine, molding machine, food machine, packaging machine, and so on.