What is a MicroLogic breaker?
Micrologic electronic trip units are designed for use in both PowerPact and Masterpact circuit breakers. Part of Pact Series. All Micrologic trip units provide impeccable, electronic circuit protection with adjustable protection settings for maximum system coordination and flexibility.
What is Micrologic control unit?
Micrologic control units offer enhanced electronic circuit protection with comprehensive, integrated measurement, preventive and predictive maintenance. Micrologic control units are designed for use in both Compact NS and Masterpact NT, NW and UR circuit breakers to cover ratings up to 6300 A.
What is Micro Logic?
Located in Northern New Jersey, Micro Logic is a privately held corporation that began publishing software in 1986. Micro Logic’s mission is to provide advanced innovative products including leading-edge productivity software that is easy to use yet powerful.
What is a trip unit?
A trip unit is the part of a circuit breaker that opens the circuit in the event of a thermal overload, short circuit or ground fault. An open circuit will not conduct electricity because either air, or some other insulator has stopped or broken the flow of current in the loop.
How does a trip circuit work?
When trip circuit is healthy and circuit breaker is closed, relay A is energized which closes the NO contact A1 and hence relay C is energized. Energized relay C keeps NC contact in open position. Now if the circuit breaker is open, relay B is energized which closes No contact B1 hence relay C is energized.
What does trip mean in electricity?
A circuit breaker “trips” (shuts off the electrical flow) in order to protect the circuit from overheating. It’s a safeguard that helps prevent damage and electrical fires. If it happens often, there’s a root cause that you need to address.
What is trip circuit healthy?
The trip circuit supervision, in its simplest form, may consist of a ‘Trip Circuit Healthy (TCH)’ indication lamp, as shown in the figure below. To avoid any unwanted tripping of the breaker, in the event of any short circuit in the lamp, a series resistor (R) is added in the circuit.
How does a relay trip a breaker?
In a typical application, the over current relay is connected to a current transformer and calibrated to operate at or above a specific current level. When the relay operates, one or more contacts will operate and energize to trip a circuit breaker.
What is 86 lockout relay?
Many utilities employ lockout relays (ANSI device number 86, electrically operated, hand or electrically reset) that function to shut down and hold equipment out of service on the occurrence of abnormal conditions.
Why DC is used in relay?
DC power is used because it allows for a battery bank to supply close/trip power to the breaker control circuits in the event of a complete (AC) power failure.