What is PLA relay?
Number of relays with stringent technical specifications are developed for Defense organization, Railways, Mobile towers, Diesel gensets, Power distribution panel, and SCADA application, Telephone Industries, Anti-pumping applications etc. …
What does 86 do on a relay?
Realizing that 85 and 86 are the coil pins, these pins will be transferring the current through the coil. 85 will be used to ground your relay, while 86 will be connected to the switchable power. 87 and 87a will be connected to your controlled accessories that you wish to turn on and off with your relay.
What is the function of a relay?
Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a relay contact is normally open (NO), there is an open contact when the relay is not energized.
What are the four functions of a relay?
If preventive relays are being used, it can detect overcurrent, overload, undercurrent, and reverse current to ensure the protection of electronic equipment. Last but not the least; it is used to heat the elements, switch on audible alarms, switch the starting coils, and pilots the lights.
What is magnetic relay?
Magnetic latching relay is a new type of relay developed in recent years. It is also an automatic switch. Like other electromagnetic relays, it can switch on and off the circuit automatically.
What is a 94 relay?
94 Tripping or trip-free relay A relay that functions to trip a circuit breaker, contactor, or equipment, to permit immediate tripping by other devices, or to prevent immediate reclosing of a circuit interrupter if it should open automatically, even though its closing circuit is maintained closed.
What is an octal relay?
Octal electro-mechanical plug-in relays serve industrial applications including controlling power and sequencing for machinery or control panels. These relays include a flag to indicate manual/powered condition and an in-operation indicator LED.