C&S MRN3 Скачать руководство пользователя страница 1 | Manualshive

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High-Tech Range

MRN3-

Mains decoupling Relay

C&S Protection & Control Ltd.

L3

TRIP

ENTER

+

-

SELECT/RESET

RS

L2

L1

U<

U<<

1/3

U>

U>>

f

N

DQ

T

MRN3-1

FR

P2

D/Y

f

max

min

DQ

f

1

t

f1

f

2

f

3

t

f2

t

f3

t

U>>

t

U<<

t

U<

t

U>

1
2
3
...
»

Содержание MRN3

Страница 1: ...High Tech Range MRN3 Mains decoupling Relay C S Protection Control Ltd L3 TRIP ENTER SELECT RESET RS L2 L1 U U 1 3 U U fN DQ T MRN3 1 FR P2 D Y f max min DQ f1 tf1 f2 f3 tf2 tf3 tU tU tU tU...

Страница 2: ...ge threshold value for frequency and vector surge measuring df dt at MRN3 2 MRN3 2 MRN3 2 MRN3 2 MRN3 2 5 4 8 Adjustment of the slave address 5 4 9 Setting of Baud rate applies for Modbus Protocol onl...

Страница 3: ...g z effective analog low pass filter for suppressing harmonics when measuring frequency and vector surge z digital filtering of the measured values by using discrete Fourier analysis to suppress highe...

Страница 4: ...1 and MRN3 2 Fig 3 1 Connection diagram MRN3 1 and MRN3 2 Storage division Independent of the recording time the entire storage capacity can be divided int0 several cases of disturbance with a shorter...

Страница 5: ...and time The window for parameter setting is located behind the measured value display The parameter window can be accessed via the SELECT RESET key 3 2 Parameter settings System parameter P P P P Par...

Страница 6: ...by a built in watchdog timer In case of a failure the watchdog timer resets the microprocessor and gives an alarm signal via the output relay self supervision 4 3 Voltage supervision The voltage elem...

Страница 7: ...ripping during occurence of interference voltages and phase shifts the relay works with an adjustable measuring repetition see chapter 5 4 2 Frequency tripping is sometimes not desired by low measured...

Страница 8: ...evelopment Power relays are able to pickup within 200 ms but they cannot prevent power to rise to short circuit values too Since power changes are also caused by sudden loaded alternators the use of p...

Страница 9: ...a high resistance mains failure occurs then there are no vector surge nor power and frequency changes and the mains failure is not detected This can only happen if the public grid is disconnected near...

Страница 10: ...3 3 3 3 df dt df dt df dt df dt df dt 1 voltage to external free program free program free program free program free program blocking input is mable mable mable mable mable applied 2 blocking input i...

Страница 11: ...inseconds one time for each value tf1 frequencyelementf2 setting value in Hz SELECT RESET f2 tripping delay of frequency element f2 settingvalueinseconds one time for each value tf2 frequencyelementf3...

Страница 12: ...ary voltage should be shown the parameter is to be set to 1 5 3 2 Y Switch over Depending on the mains voltage conditions the input voltage transformers can be operated in delta or Y connection Change...

Страница 13: ...put Parameter switch B_FR External trigger RESET input ing of the fault recorder R_FR Blocking input External trigg ering of the fault recorder R_FR Parameter switch External trigg ering of the fault...

Страница 14: ...s The minimum tripping delay tf1min of the relay depends upon the number of set measuring repetitions T periods and amounts to T tf min 2 49 T 1 20 ms 50 69 T 49 50 ms 1 s 70 99 T 69 100 ms 2 s When s...

Страница 15: ...plies for Modbus Protocol only Different transmission rates Baud rate can be set for data transmission via Modbus Protocol The rate can be changed by push buttons and and saved by pressing ENTER 5 4 1...

Страница 16: ...put relays 1 4 are normally off and can be assigned as alarm or tripping relays to the voltage functions which can either be done by using the push buttons on the front plate or via serial interface R...

Страница 17: ...MRN3 MRN3 MRN3 offers a minimum maximum storage each for the measuring values of the vector surge as well as the frequency gradient These min max values are mainly used to appraise the system quality...

Страница 18: ...LT1 FLT2 FLT3 are displayed FLT1 means the latest fault data set recorded At the same time the parameter set active at the occurence is shown z By pressing SELECT RESET the fault measuring values can...

Страница 19: ...lay shows the first part of the software version of the relay e g D08 By pressing the push button TRIP twice the display shows the second part of the software version of the relay e g 4 01 The softwar...

Страница 20: ...Delta connection At Delta connection At Delta connection z Phase to phase voltages LED L1 L2 L2 L3 L3 L1 The frequency is indicated on the display in Hz LED f system frequency 50 01Hz Indication 5001...

Страница 21: ...kes it necessary that the other frequency elements of the relay have to be blocked by setting the frequency pickup values f1 f3 to EXIT For testing the pickup and dropout to pickup values the test fre...

Страница 22: ...measures correctly 6 7 Maintenance Maintenance testing is generally done on site at regular intervals These intervals vary among users depending on many factors e g the type of protective relays empl...

Страница 23: ...interruption of the auxiliarxy supply without a facting the function of the device 50 ms Influences on voltage measuring Aux voltage in the range 0 8 UH UHN 1 2 no additional influences measured Freq...

Страница 24: ...0 1 0 2 0 5 2 0s 15 ms Frequency meas T 2 99 Cycles 1 uring repetition Frequency f1 f3 30 49 99 EXIT 50 01 70 Hz1 0 1 0 01 Hz 0 005 Hz element 1 3 40 59 99 EXIT 60 01 80 Hz2 tf1 tf3 tf min 3 50 s EXI...

Страница 25: ...TRIP A_PI TEST FR Pre trigger time 0 05 s 8 00 s T T T T Table 7 2 Parameters for the fault recorder able 7 2 Parameters for the fault recorder able 7 2 Parameters for the fault recorder able 7 2 Par...

Страница 26: ...lement s 0 04 U pickup value for overvoltage element low set V 110 250 440 tU tripping delay for overvoltage element s 0 04 U pickup value for overvoltage element high set V 120 270 480 tU tripping de...

Страница 27: ...Set1 Set1 Set1 Set1 Set2 Set2 Set2 Set2 Set2 Set1 Set1 Set1 Set1 Set1 Set2 Set2 Set2 Set2 Set2 Set1 Set1 Set1 Set1 Set1 Set2 Set2 Set2 Set2 Set2 U X X U X X U X X U X X f1 X X f2 X X f3 X X X X df dt...

Страница 28: ...r Reset input Low High range for Reset input Low High range for Reset input Low High range for Reset input Low High range for blockage input Low High range for blockage input Low High range for blocka...

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