C&S MRN3 Manual Download | Manualshive

Page: 1 / 28

background image

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
...
»

Summary of Contents for MRN3

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Reviews:

No comments

Related manuals for MRN3

Brand: Basler Pages: 91

Brand: National Instruments Pages: 51

Brand: Westinghouse Pages: 114

Brand: Westinghouse Pages: 178

Brand: Schrack Pages: 4

Brand: Eaton Pages: 72

Brand: Schweitzer Engineering Laboratories Pages: 276

Brand: Robertshaw Pages: 4

Brand: Robertshaw Pages: 4

Brand: ZiFiSense Pages: 15

Brand: Sangoma Pages: 78

Brand: ABB Pages: 27

Brand: ABB Pages: 40

Funke+Huster Fernsig TAR22

Brand: Eaton Pages: 8

Brand: Zamel Pages: 2

BJ-PR200 Series

Brand: BLUE JAY Pages: 27

Brand: Westinghouse Pages: 12

Brand: WURM Pages: 4

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands