A small light bulb is often used to test a solid state relay (SSR). That is because a SSR needs a minimum load of at least 0.1 amps in order to operate. Using a meter does not provide a sufficient load.
No.If you are looking of a relay that will allow 240V, many suppliers sell a SSR that will handle up to 280V AC. Most are triggered by 3-32v dc.Just google: solid state relay OR solid state contactor
Typically, when the coil voltage on a relay is decreased gradually, the relay "hold" will release at a certain voltage. This is usually defined as the Drop-out voltage (defined at some minimum value). Now, in the case of latching relay, the Drop-out voltage is called the Reset voltage.
They can be used as a kind of safety switch to allow a circuit with a small current through to switch on a circuit that will hve a larger current flowing through it.
A protective relay may fail to send a signal for many reasons - assuming it should have operated (so pickups, time dials, etc. are set so the relay should have operated), the relay may be out of tolerance, if it is a microprocessor based relay it may be in some state of failure or there may be a fluke situation that causes an element to hang up, if it is solid state, it's power supply may have failed (many solid state did not have any sort of monitoring for this condition). Battery power may not be sufficient to operate the breaker, or wiring to the breaker may be compromised (open test switch, lifted wire, rodent damage to wiring, etc.). The analog connections to the relay may be bad, or wiring may have issues (such as multiple grounds on PT/CT connections). I've seen where a CT was supposed to be wye connected and one of the ground jumpers was missing, which caused some strange behavior. A relay output contact may have failed as well - if not properly designed, these can get burned out fairly easily. Microprocessor relays have an abundance of programming options; sometimes they get programmed wrong as well.
current relay are using for over current low state & high state.but potential relay are related to voltage.
not sure
No.If you are looking of a relay that will allow 240V, many suppliers sell a SSR that will handle up to 280V AC. Most are triggered by 3-32v dc.Just google: solid state relay OR solid state contactor
Not without other modifications. The circuits used to turn the solid state relay on will not be suitable for turning a contactor on.
Air Compressor solid state relay
All solid state relays are relays, but not all relays are solid state relays. There are three basic kinds of (protective) relays I know of: electromechanical (rely on induced voltages and currents to spin disks or energize solenoids), solid state (built with solid state parts - basically prerequisites to microprocessors), and microprocessor based relays (fancy computers).
The WAC relay is a solid state relay usually used to control the air conditioning compressor clutch.
The terminals on a solid state relay are typically called input terminals and output terminals. The input terminals are used to connect the control signal that activates the relay, while the output terminals are used to connect the load that is being switched on or off by the relay.
Wire it as shown in the diagram at the link below.
a relay that detects the amperage the motor is drawing when the motor dwaws too much to drops out the coil voltage to shut down motor and prevent damage
There is a WOT A/C relay - Wide Open Throttle A/C relay - that shuts off the air conditioning compressor when you floor the gas pedal The wac relay is a solid state relay usually used to control the air conditioning compressor's clutch.
David W. Little has written: 'A time-overcurrent relay with solid-state circuitry'
It is an electronic switching device which controls larger load currents from small currents inside them.