A protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers when a fault was found. Unlike switching type relays with fixed and usually ill-defined operating voltage thresholds and operating times, protective relays had well-established, selectable, time/current (or other operating parameter) curves. Such relays were very elaborate, using arrays of induction disks, shaded-pole magnets, operating and restraint coils, solenoid-type operators, telephone-relay style contacts, and phase-shifting networks to allow the relay to respond to such conditions as over-current, over-voltage, reverse power flow, over- and under- frequency, and even distance relays that would trip for faults up to a certain distance away from a substation but not beyond that point. An important transmission line or generator unit would have had cubicles dedicated to protection, with a score of individual electromechanical devices. The various protective functions available on a given relay are denoted by standard ANSI Device Numbers. For example, a relay including function 51 would be a timed overcurrent protective relay. These protective relays provide various types of electrical protection by detecting abnormal conditions and isolating them from the rest of the electrical system by circuit breaker operation. Such relays may be located at the service entrance or at major load centers. http://en.wikipedia.org/wiki/Relay
N V. Chernobrovov has written: 'Protective relaying'
The runners in this race will be relaying the baton rather quickly.
1) protection of various ac and dc components 2)it can be used for differential protection 3)used as auxiliary relays in contact systems of protective relaying schemes
relaying
accurate relaying of messages= when you have a message for someone else you are able to make sure you restate the message correctly.
The anagrams are relaying and yearling.
Current transformers (CTs) are used to monitor the current (or lack of) in high-voltage systems, and their secondary outputs controls the behaviour of protection-system relays. The CTs (1) reduce the current to values that match the current ratings of the protective relays, and (2) electrically-isolate the relays from the high-voltage system.
Arun G. Phadke has written: 'Handbook of Electrical Engineering Calculations (Electrical and Computer Engineering)' 'Computer relaying for power systems' -- subject(s): Protection, Protective relays, Electric power systems, Data processing
poprelayd Answer is: /etc/mail/access
Pets are alkie by entertaning people and relaying on people.
No they are microphones for relaying instructions
picking up information and relaying it to the brain