The Solid State Relay (SSR) is an electronic switching device that is activated by applying an external voltage across its terminals. By applying a low voltage to the control terminals of Solid State Relays (SSRs), they can generally switch high-voltage circuits on and off.
The Solid State Relay (SSR) does not have moving parts, making it more reliable than a mechanical relay. When a programmable logic controller (PLC) or microprocessor produces control signals, Solid State Relay are typically used to control AC or DC loads. In addition to industrial controls, lighting controls, HVAC, process controls, and other applications requiring high voltages or currents, they are also used for switching high voltages and currents. Rather than using moving components to control input-to-output actions, solid-state semiconductors use their electrical and optical properties.
This electronic switching device consists of no moving parts and is made of semiconductors. It is a Solid State Relay since there are no moving parts. It does not undergo wear and tear on contact, making it long-lasting for up to 100 million operations.
Solid State Relays (SSRs) Types
Solid State Relays can be classified into the following types based on their applications and switching methods:
Instant ON Solid State Relay
Solid State Relay with instant ON function switch on the load circuit as soon as there is sufficient input voltage. Input voltage is removed when the load current crosses the next zero, and the device turns off. Inductive loads can be controlled by instant ON SSRs. Magnetic valves, contactors, starters, and switching contactors are some of the practical applications.
Zero Switching Solid State Relay
Zero-switching Solid State Relay are designed to turn on whenever the load ac voltage crosses the next zero voltage. The load AC voltage reaches zero volts when the input voltage is removed. In order to operate a zero-switching relay, a zero-crossing circuit is used. In the zero-crossing circuit, the TRIAC is activated when there is a zero-crossing in voltage. Zero-switching relays are mainly intended for controlling resistive loads. Applications include temperature control of heating elements, soldering irons, and ovens.
Peak Switching Solid State Relay
Peak switching Solid State Relay are enabled when the output ac voltage reaches its next peak after applying the control input voltage. When the input control voltage is removed, and the output AC current crosses zero, it turns off. In a peak control circuit, the output AC voltage is detected when it reaches its peak, and the TRIAC is fired when it does. A transformer, a large motor, or a heavy inductive load can be controlled with these switches.
Analog Switching Solid State Relay
Depending on the input voltage amplitude, analog switching Solid State Relay switch. Analog switching Solid State Relay have a proportional starting output voltage to their input control voltage. A switch is triggered when the control input voltage is removed and the output ac current crosses zero. The analog switching SSRs are equipped with synchronizing circuits that control the output voltage according to the control input voltage.
It is primarily designed for closed-loop applications like temperature control in that analog switching Solid State Relay are used.
What does Solid State Relay do?
What is the process of operating a Solid State Relay?
Advantages of Solid State Relay
BCH Solid State Relays:
Applications of Solid State Relays
Solid State Relays are more convenient and durable devices as compared to convection switching devices, making them handy in applications. They are most commonly used in applications requiring frequent and high-frequency switching. Due to its unique advantages, it can control AC or DC circuits with smaller inputs and larger output signals. As a result, they are useful for industrial motor control and domestic electronics, such as:
BCH Solid State Relays are the most suitable switching systems available today with their longer life, sensitivity, and faster functions. Domestic and industrial electrical systems use them as effective and reliable switching mechanisms.
A BCH Solid State Relay is ideal for applications requiring high switching frequencies and can withstand harsh environments such as shock, vibration, and dust.
Solid State Relays have no moving parts and switch power to a load circuit electronically. As a result, there is no mechanical wear and tear on contacts. Over 100 million operations are expected to be performed by Solid State Relays during their lifetimes.
In addition to heating and motor control applications, BCH Solid State Relays are also used for capacitor switching and lighting control, solenoids, transformers, and air conditioning.
While serving the same purpose as an electromechanical relay, expect moving parts. A solid state relay differs from a general relay in that it primarily comprises electronic components and does not contain mechanical contacts. Thus, Solid State Relays have wide features.
BCH Solid State Relays range from 12A to 125A. Which single-phase and three-phase Solid State Relays are available with low-level output control without interfacing. Its narrow Solid State Relay range has current monitoring & temperature controller PID with high switching frequency and longer life. Solid relay has a compact size with an input voltage of 3 to 32VDC, while other voltages are requested.
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