frequency relay
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frequency relays
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Best Deals from Frequency Relays
High Frequency Relay
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High Frequency Plating Rectifier
22,500 Per Piece
1 Piece (MOQ)
Voltage Frequency Relay
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Micro controller based technology. Protection against under voltage, Over voltage, Over Frequency and Under Frequency. All set points settable by keys. Trip Delay for voltage & Frequency is settable Reverse Phasing Protection can be bypass through settings. Indications Voltage relay, Freq relay ON. Message display for Under/Over Voltage & Under\Over Freq Faults. No separate auxiliary supply required.
Over Frequency Relay
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Features Two stage of frequency protection Digital display of line frequency Draw out case 144x144 mm Principle of Operation: The JRF 014 is microprocessor based frequency relay The relay can be configured for 2 stage under frequency relay, two stage over frequency relay or Under / Over frequency relay. The relay's operating time can be programmed. The relay measures line frequency and if it exceeds the set threshold in case of over frequency or if it is less than set threshold in case of under frequency then relay extends a trip signal after an operating time.
High Frequency Needle
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Voltage Frequency Relay
1,500 - 5,000 Per Piece
5 Piece (MOQ)
frequency relay
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• Smart design to fit on any standard mounting channel.• Choice of screw less terminals•Total wireless interiors• + 2% Accuracy• Test & Auto/Manual Reset facility• Designed for high reliability, as relay energizes only under fault conditions
Over Frequency Relay
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We are offering over frequency relay. Features two stage of frequency protection digital display of line frequency draw out case 144x144 mm.
frequency relays
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A frequency variations involves a change in frequency from the normally stable utility frequency of 50 hz 60hz. This may be caused by erratic operation of emergency generators or unstable frequency power sources. MFR 8801 reads the frquency. Displays it and compares it with set frequency and trip the deviceif frequency read is out of selected range. General Features Easy installation Low frequency Setting in range 35 Hz to 65Hz in step of 0.5Hz High frequency Setting in range 35HZ to 65Hz in step of 0.5Hz Trip Delay Time Setting in range of 1 to 60 sec in step of 1 sec.
frequency relays
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Operations of the relay can be tested by means of a test, button which energies the output relays & LED’s after set time delay with the channels set to underover frequency operation. Access to the test push button requires removal of the front cover. This test facility should normally only be used with the relay trip circuits isolated, The relays are suitable for any application in industrial plants & to generators where definite time underover frequency protection is required.
frequency relay
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Generator and captive power plantOver frequency relay applied as backup protection for mechanical over speed devices to avoid damages to prime moverUnder frequency relay applied to protect field winding from excessive current, over regulator from overloadServo controller and invertors Specification Dedicated microcontroller based Accurate, reliable and tropicalized design Continuous display of the measured frequency User selectable upper frequency and lower frequency limits User selectable trip timings Uses SMPS for Auxiliary power i.e. Wide operating range for Auxiliary input 85-275C AC/DC
Voltage Frequency Protection Relay
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frequency relays
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This project monitors the frequency fluctuations in power system and detects them. therefore we have designed a microcontroller based underover frequency relay. the under-frequency relay is used for automatic load shedding and restoration. the frequency of the system is continuously monitored by using digital monitoring and data acquisition system. the monitored frequency is displayed and depending on the value of the frequency, the required decision is taken by the microcontroller. this project, hardware as well as software for frequency relaying, has been developed. in this project we have used microcontroller 8051 for detecting the frequency fluctuations. when frequency goes below or above from desired value appropriate trip signal is generated in the form of leds. frequency variation also decreases the life of the equipment and directly affects the overall production of the plant. we can give an overview of the complete operation with the help of microcontroller 8051 kit having internal 8255 programmable peripheral interfaces, a zero cross detector and a smps or switched-mode power supply. a zcd converts the input sinusoidal signal to a square wave of the same frequency
frequency relays
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Protection of 3 Phase devices against Over voltage, Under voltage,(UB) Single Phasing,(SPP) Over Frequency, Under Frequency, Reverse Phasing & Unbalance supply are one of the major issues in electrical systems. For safe running of 3-phase devices, special protections that keep a continuous watch on supply conditions are very essential. The major cause of maximum load burn-out is overloading,which occurs due to Unbalance Supply, Single Phasing or Reverse phasing conditions. VFR3P detects such conditions & protects the load from the burn out. 'Proton's VFR 3P' offers above protections along with 3 digit display showing R-Y,Y-B,B-R, voltages in scanning mode with precise accuracy. LowHigh voltage tripping to ensures trouble free running of 3-phase Loads, and also protection is provided against Over Under Frequency
frequency relays
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This unit monitors the frequency of a single phase supply and operates a relay if the frequency goes above or below set levels. LEDs indicate power on and trip status. Two changeover, volt-free relays are fitted.Front panel controls allow selection of:
frequency relays
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Single phase under & over frequency, Microcontroller based design, SMD technology, Auto reset, Adjustable underover frequency trip settings, Adjustable trip delay & ON delay, 2 CO output relay Failsafe-non-failsafe mode selectable
High Frequency Needle
6,000 Per Piece
SELCO T3000 FREQUENCY RELAY T3000-03 480 VAC
300 Per Piece
1 Piece(s) (MOQ)
selco t3000 frequency relay t3000-03 480 vac part no: t3000-03 supply voltage: 1-3 :- 480 vac 2-3 :- 415 vac condition: used & working qty: 1 pc available ref: al.