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MRU3-1

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AC voltage relay

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Содержание MRU3-1

Страница 1: ...MRU3 1 AC voltage relay...

Страница 2: ...only 5 5 Parameter for the fault recorder 5 5 1 Adjustment of the fault recorder 5 5 2 Number of the fault recordings 5 5 3 Adjustment of trigger occurences 5 5 4 Pre trigger time Tpre 5 6 Date and t...

Страница 3: ...Features and characteristics Microprocessor technology with watchdog digital filtering of the measured values by using dis crete Fourier analysis to suppress higher harmonics and d c components induc...

Страница 4: ...asuring circuits are shown in the connection diagram The analog input voltages are galvanically decoupled by the input transformers of the device then filtered and finally fed to the analog digital co...

Страница 5: ...riting over If 2 4 or 8 recordings are chosen the complete memory is divided into the relevant number of partial segments If this max number of fault event has been exceeded the fault recorder block a...

Страница 6: ...rameters for the fault recorder FR Number of disturbance events FR Trigger events FR Pre trigger time Tvor Date and time Year Y 00 Month M 04 Day D 18 Hour h 07 Minute m 59 Second s 23 Additional func...

Страница 7: ...ting values for all parameters are stored in a parameter memory EEPROM Electrically Erasable Programmable Read Only Memory so that the actual relay settings cannot be lost even if the power supply is...

Страница 8: ...elta connection D 7 7 7 Sec winding of mains V T Figure 4 2 Input v t s in star connection Y 4 4 Blocking function No Dynamic Behaviour U U 1 voltage to external blocking input is ap plied free pro gr...

Страница 9: ...e time for each value U tU rated frequency setting value in Hz SELECT RESET fN U U 1 phase 3 phase U 1 U 3 SELECT RESET 1 3 Blocking function EXIT until max setting value until min setting value LED o...

Страница 10: ...an be correctly meas ured between 40 Hz and 70 Hz without adverse ef fects from the frequency With the setting f 50 60 Hz the measured voltage value is influenced by the frequency see Table 5 2 Declin...

Страница 11: ...d as parameter set change over switch With the setting R_S2 the reset input D8 E8 is used as pa rameter set change over switch With the setting B_FR the fault recorder is activated immediately by usin...

Страница 12: ...this ad justment the LED RS lights up 5 4 4 Setting of Baud rate applies for Modbus Protocol only Different transmission rates Baud rate can be set for data transmission via Modbus Protocol The rate...

Страница 13: ...failures min 6 minutes Note The window for parameter setting is located behind the measured value display The parameter window can be accessed via the SELECT RESET key 5 7 Indication of measuring valu...

Страница 14: ...the latest fault data set recorded At the same time the pa rameter set active at the occurence is shown By pressing SELECT RESET the fault measuring values can be scrolled By pressing it can be scroll...

Страница 15: ...LECT RESET in blocking mode again the assignment mode is selected The relays are assigned as follows LEDs U U U and U are two coloured and light up green when the output relays are assigned as alarm r...

Страница 16: ...be reset when the pickup is not present anymore otherwise TRIP remains in display During resetting of the display the parameters are not affected 5 9 3 Erasure of fault storage To delete the trip stor...

Страница 17: ...circuit breaker if tripping is not desired By pressing the push button TRIP once the display shows the first part of the software version of the relay e g D08 By pressing the push button TRIP twice t...

Страница 18: ...gu lation Voltage adjustable from 0 to 2 x UN Timer to measure the operating time Accuracy class 10 ms Switching device Test leads and tools 6 4 2 Example of the test circuit For testing of the MRU3 1...

Страница 19: ...n must not exceed 1 of the set operating value Furthermore gradually decrease increase the volt ages until the relay resets i e the voltage alarm output relay is disengaged Check that the dropout to p...

Страница 20: ...he relay works and measures correctly 6 6 Maintenance Maintenance testing is generally done on site at regu lar intervals These intervals vary among users depend ing on many factors e g the type of pr...

Страница 21: ...ime lag error class index E 10 ms Minimum operating time 30 ms Max allowed interruption of the auxiliarxy supply without effecting the function of the device 50 ms Influences on voltage measuring Aux...

Страница 22: ...0 V 2 200 V EXIT UN 230 V 2 460 V EXIT UN 400 V 4 800 V EXIT 0 04 50 s EXIT 1 V 1 V 2 V 0 01 0 02 0 05 0 1 0 2 0 5 1 0 2 0 s 1 of set value or 0 3 UN 1 or 15 ms 7 3 1 Interface parameter Function Para...

Страница 23: ...asuring of the positive phase sequence negative phase sequence and zero phase sequence system component 1 2 Rated voltage 100 V 230 V 400 V 1 2 4 Housing 12TE 19 rack Flash mounting A D RS 485 Alterna...

Страница 24: ...ernal triggering for the fault recorder SET1 Protection parameter Function Unit Default settings Set 1 Set 2 Actual settings Set 1 Set 2 1 3 1 phase 3 phase tripping U 1 U Pickup value for undervoltag...

Страница 25: ...the minute minute m 00 Clock Setting of the second second s 00 Blocking function Default settings Actual settings Blocking Not blocking Blocking Not blocking Parameter set Set 1 Set 2 Set 1 Set 2 Set...

Страница 26: ...Plugged Not plugged X No function X Code jumper Low High range for reset input Low High range for blockage input Default settings Actual settings Default settings Actual settings Low plugged X X High...

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