What is a trip relay?
In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected.
When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name: contactor. The auxiliary contact is often used in a relay logic circuit, or for some other part of the motor control scheme, typically switching 120 Volt AC power instead of the motor voltage.
- A contactor is an electrically-controlled switch (relay) used for switching an electrical power circuit. Contactors come in many forms with varying capacities and features. Unlike a circuit breaker, a contactor is not intended to interrupt a short circuit current.
- Lock out relay is the Master Trip relay, (It is a latch relay once operated we have to reset it by manual), which is used for Turbineprotection,Transformer protection,Generator protection (fixed in indoor panel, standard manufacturer only making those relays) if it operated because of any fault in above the after
- Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. When a relay contact is Normally Closed (NC), there is a closed contact when the relay is not energized.
The anti-pumping relay is a device in circuit-breaker whose function is to prevent multiple breaker closures. For instance, if the operator gives the closing command to the breaker by pressing the close button and the breaker closes.However, a fault in the system causes the breaker to trip.
- A trip-free circuit breaker is a circuit breaker that will trip (open) even if the operating mechanism (ON-OFF switch) is held in the ON position. A nontrip-free circuit breaker can be reset and/or held ON even if an overload or excessive heat condition is present.
- A motor capacitor, such as a start capacitor or run capacitor (including a dual run capacitor) is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field.
- There are two commonly used capacitor symbols. One symbol represents a polarized (usually electrolytic or tantalum) capacitor, and the other is for non-polarized caps. In each case there are two terminals, running perpendicularly into plates. The symbol with one curved plate indicates that the capacitor is polarized.
Updated: 2nd October 2019