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Что (кто) такое protective relay - определение
Найдено результатов: 1003
Protective relay
RELAY DEVICE DESIGNED TO TRIP A CIRCUIT BREAKER WHEN A FAULT IS DETECTED
Differential relay; Distance relay; EOCR; IDMT relay; Inverse definite minimum time; Inverse definite minimum time relay; Overcurrent relay; Over-current relay; Impedance relay; DTOC relay; Definite time over-current relay; Definite time overcurrent relay; Directional relay; IOC relay; Instantaneous over-current relay; Instantaneous overcurrent relay; ITOC relay; Inverse-time over-current relay; Inverse time over current relay; OC relay; Overvoltage relay
In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected. The first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as over-current, overvoltage, reverse power flow, over-frequency, and under-frequency.
Numerical relay
COMPUTER-BASED SYSTEM WITH SOFTWARE-BASED PROTECTION ALGORITHMS FOR THE DETECTION OF ELECTRICAL FAULTS
Numeric relay; Digital protective relay
In utility and industrial electric power transmission and distribution systems, a numerical relay is a computer-based system with software-based protection algorithms for the detection of electrical faults. Such relays are also termed as microprocessor type protective relays.
relay
![Solid-state]] relays have no moving parts.](https://commons.wikimedia.org/wiki/Special:FilePath/Solid state relay.jpg?width=200 "Solid-state]] relays have no moving parts.")
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
(relayed)
1.
A relay or a relay race is a race between two or more teams, for example teams of runners or swimmers. Each member of the team runs or swims one section of the race.
Britain's prospects of beating the United States in the relay looked poor.
N-COUNT
2.
To relay television or radio signals means to send them or broadcast them.
The satellite will be used mainly to relay television programmes...
This system continuously monitors levels of radiation and relays the information to a central computer...
VERB: V n, V n to/from n
3.
If you relay something that has been said to you, you repeat it to another person. (FORMAL)
She relayed the message, then frowned...
= pass on
VERB: V n
Personal protective equipment
![A 1568 painting depicting beekeepers in protective clothing, by [[Pieter Brueghel the Elder]].](https://commons.wikimedia.org/wiki/Special:FilePath/Die Bienenzüchter (Bruegel).jpg?width=200 "A 1568 painting depicting beekeepers in protective clothing, by [[Pieter Brueghel the Elder]].")
![glove]] and the [[lab coat]] exposes the wrist to hazardous materials.](https://commons.wikimedia.org/wiki/Special:FilePath/Incorrect use of personal protective equipment.png?width=200 "glove]] and the [[lab coat]] exposes the wrist to hazardous materials.")
![[[N95 mask]]](https://commons.wikimedia.org/wiki/Special:FilePath/N95mask.jpg?width=200 "[[N95 mask]]")
![Medical [[PPE gowns]] worn by medical personnel during the [[COVID-19 pandemic]]](https://commons.wikimedia.org/wiki/Special:FilePath/PPE kit.jpg?width=200 "Medical [[PPE gowns]] worn by medical personnel during the [[COVID-19 pandemic]]")
![gloves]] while weighing [[carbon nanotube]]s](https://commons.wikimedia.org/wiki/Special:FilePath/Worker weighing carbon nanotubes.png?width=200 "gloves]] while weighing [[carbon nanotube]]s")
PROTECTIVE CLOTHING OR EQUIPMENT DESIGNED TO HELP PROTECT AN INDIVIDUAL FROM INJURY, INFECTION, OR OTHER HAZARDS
Safety clothing; Safety gear; Protective Suit; Protective gear; Protective equipment; Protective wear; Protective clothing; Protective protective equipment; Protective Wear; Personal Protective Equipment; Safety equipment; Anti-contamination clothing; Personal safety equipment; Ebola suit; Personal protection equipment; Protective Clothing; Wearer protection; PPE Kit; Head protective device
Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, electrical, heat, chemicals, biohazards, and airborne particulate matter.
relay
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
I
n. to run a relay
II
v. (B) she relayed the information to us
Relay
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
·noun A number of men who relieve others in carrying on some work.
II. Relay ·vt To lay again; to lay a second time; as, to relay a pavement.
III. Relay ·noun A supply of horses placced at stations to be in readiness to relieve others, so that a trveler may proceed without delay.
IV. Relay ·noun A supply of anything arranged beforehand for affording relief from time to time, or at successive stages; provision for successive relief.
V. Relay ·noun A supply of hunting dogs or horses kept in readiness at certain places to relive the tired dogs or horses, and to continue the pursuit of the game if it comes that way.
VI. Relay ·add. ·adj Relating to, or having the characteristics of, an auxiliary apparatus put into action by a feeble force but itself capable of exerting greater force, used to control a comparatively powerful machine or appliance.
VII. Relay ·noun In various forms of telegraphic apparatus, a magnet which receives the circuit current, and is caused by it to bring into into action the power of a local battery for performing the work of making the record; also, a similar device by which the current in one circuit is made to open or close another circuit in which a current is passing.
relay
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
relay1 ['ri:le?]
¦ noun
1. a group of people or animals engaged in a task for a period of time and then replaced by a similar group.
a race between teams of runners, each team member in turn covering part of the total distance.
2. an electrical device which is activated by a current in one circuit to open or close another circuit.
3. a device to receive, reinforce, and retransmit a signal.
a message, programme, etc. transmitted by such a device.
¦ verb also r?'le?
1. receive and pass on (information).
2. broadcast by a relay.
Origin
ME: from OFr. relai (n.), relayer (v.), based on L. laxare 'slacken'.
--------
relay2 [ri:'le?]
¦ verb (past and past participle relaid) lay again or differently.
Relay
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
A receiving instrument which moves in accordance with impulses of
currents received, and in so moving opens and closes a local circuit,
which circuit may include as powerful a battery as required or
desirable, while the relay may be on the other hand so delicate as to
work with a very weak current.
Fig. 287. RELAY.
The typical relay includes an electro-magnet and armature. To the latter
an arm is attached and the lower end of the arm works in pivots. As the
armature is attracted the arm swings towards the magnet. When the
current is cut off, the armature and arm are drawn back by a spring.
When the arm swings towards the magnet its upper end touching a contact
screw closes the local circuit. When it swings back it comes in contact
with a second screw, with insulated point, and opens the circuit as it
leaves the first named screw.
One terminal connects with the arm through the pivots and frame. The
other connects with the contact screw through the frame carrying it.
Synonym--Relay Magnet.
Fig. 287. RELAY.
The typical relay includes an electro-magnet and armature. To the latter
an arm is attached and the lower end of the arm works in pivots. As the
armature is attracted the arm swings towards the magnet. When the
current is cut off, the armature and arm are drawn back by a spring.
When the arm swings towards the magnet its upper end touching a contact
screw closes the local circuit. When it swings back it comes in contact
with a second screw, with insulated point, and opens the circuit as it
leaves the first named screw.
One terminal connects with the arm through the pivots and frame. The
other connects with the contact screw through the frame carrying it.
Synonym--Relay Magnet.
relay
ELECTRICALLY OPERATED SWITCH
Relays; Control relay; 3000 Type Relay; 600 Type Relay; Electrical relay; Electromechanical relay; Relay switch; Electric relay; Latching relay; Mercury-wetted relay; Coaxial relay; Overload protection relay; Voltage-sensitive relay; Impulse relay; Voltage Sensitive Relay; Bistable relay; Stay relay; Keep relay; Relay (electrical); Blocking relay; Alarm relay; Power factor relay; Ground detector relay; Lockout relay; Pilot-wire relay; Reclosing relay; Field application relay; Field excitation relay; Tripping relay; Trip-free relay; Under-voltage relay; Over-voltage relay; Over excitation relay; Under excitation relay; Transfer relay; Undercurrent relay; Underpower relay; Annunciator relay; Volts per Hertz relay; Field relay; Incomplete-sequence relay; Rate-of-change relay; Closing relay; DC overcurrent relay; AC reclosing relay; Checking relay; Opening relay; Phase-angle measuring relay; Transformer thermal relay; Mercury-wetted reed relay; Vacuum relay; Multi-voltage relay; Machine tool relay; Polarized relay; Solid-state contactor; Relay cabinet
n.
Supply, relief, recruitment, reinforcement.
Relay race
![Relays commemorative coin]]](https://commons.wikimedia.org/wiki/Special:FilePath/2003 Greece 10 Euro OS Relays front.jpg?width=200 "Relays commemorative coin]]")
![A final-leg runner for the [[University of Wisconsin]]](https://commons.wikimedia.org/wiki/Special:FilePath/Flickr cc runner wisconsin u.jpg?width=200 "A final-leg runner for the [[University of Wisconsin]]")
TEAM SPORT IN ATHLETICS, SWIMMING, ETC
Relay Race; Relay racing; Relay races; Baton (running); Sprint relay; Relay team; Relay (race); Overnight Running Relay; Relay (athletics); Relay race (athletics); Relay Racing; Track relay; Medley relay (athletics); Relay running; 4 x 500 metres relay; 4 x 150 metres relay; 4 × 150 metres relay; 4 × 500 metres relay; 4 × 250 metres relay; 4x150 metres relay; 4 x 250 metres relay; 4x500 metres relay; 4x300 metres relay; 4 x 300 metres relay; 4 × 300 metres relay; 4x250 metres relay
A relay race is a racing competition where members of a team take turns completing parts of racecourse or performing a certain action. Relay races take the form of professional races and amateur games.
