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21/07/2010

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MRAR 01/96 C

5.6 Circuit Example - Connection Diagram of the MRAR and MRI Together

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Содержание MRAR

Страница 1: ...n 50 60 Hz V PH Vx MRAR MODEL SERIAL NO No SHOT tD2 tf tD1 tD4 tD3 tC1 tR MRI IDS PB O LO RUN OK I CB No M No L P B Engineering P B Engineering Belle Vue Works 12 14 Crompton Way Boundary Street Crawl...

Страница 2: ...Success 14 5 3 6 Successful Reclosing 15 5 3 7 Repeated Reclosing 15 5 3 8 External Blocking and Reseting 15 5 3 9 Supervision of the Circuit Breaker Ready Information 15 5 4 Operation and Release of...

Страница 3: ...21 07 2010 3 MRAR 01 96 C 8 4 System data 23 8 5 Power supply 24 9 Housing 25 9 1 Connection Details 26 10 Order Form 27...

Страница 4: ...vercurrent Relay Independent time I D M T earth directional facilities MRI V Voltage Dependent Overcurrent Relay MREF Restricted Earth Fault Relay MRAR Auto Reclosing Relay MRMF Mains Failure Relay MR...

Страница 5: ...eg the MRI I MRCS The protective functions of the MRAR are summarised as follows Independent adjustable time ranges Four digit counter for display of the completed auto reclosing High Set blocking out...

Страница 6: ...tested by the application of a high voltage power frequency input flash tested as this will cause damage to the unit Explanation of the Circuit Diagram 4 1 1 Information Inputs Using the information...

Страница 7: ...voltage to terminal 24 This blocking can only be removed by applying the auxiliary volatge to terminal 25 Blocking has priority during the simultaneous activation of inputs 24 and 25 Reserve 26 This...

Страница 8: ...2 Adjusting LED s SHOT Green Number of reclosing attempts No Red Number of AR s carried out tf Green Fault Time tD1 Green Dead Time for the first reclosing tD2 Red Dead Time for the second reclosing...

Страница 9: ...I Red CB Red LO Red No CB Off signal after protection OFF CB CB Red Dead Time closing conditions not met S E O I Red Switch was manually switched off during Reclaim Time Manu Password combination of...

Страница 10: ...hange at an increased rate The ENTER push button is used to transfer the indicated value to the internal parameter memory An unintended or unauthorised change of the selected parameter can be avoided...

Страница 11: ...relays Code jumper J2 OFF The alarm relays respond directly upon the initiation of the corresponding measuring circuit Thus an alarm signal e g for negative sequence current will be given before the r...

Страница 12: ...ot been interrupted by other faults Activation of the unit due to protection faults is also not possible in the Reclaim Time State thus no auto reclosing can take place 5 1 3 AR Ready The relay is in...

Страница 13: ...ing Signal Reclaim Time CB OFF Reclaim Time Exprired External Blocking Signal Ready CB OFF Protection Running and or Tripped CB Energy OK External Blocking Signal Starting Starting Conditions Not Fulf...

Страница 14: ...the unit changes from the Ready to the Starting state The RUN LED illuminates and the fault timer tf adjustable from 0 01 to 2 05 s begins to time out A tripping timer set at 0 2 s is started when the...

Страница 15: ...by the applying of a reset signal to terminal 25 5 3 9 Supervision of the Circuit Breaker Ready Information Because the supervision of the circuit breaker energy store responds often after the first f...

Страница 16: ...rnal blocking input was activated The AR cycle was terminated without success The circuit breaker energy is not sufficient during a switch on attempt after first attempt see also paragraph 5 3 9 The s...

Страница 17: ...21 07 2010 17 MRAR 01 96 C 5 6 Circuit Example Connection Diagram of the MRAR and MRI Together...

Страница 18: ...ime 1 tD1 Dead Time 2 tR Reclaim Time As a short circuit occurs the circuit breaker is switched off by the protecting device and the dead time counter in the MRAR starts to time out After this dead ti...

Страница 19: ...ed 5 7 3 Manual Switching On of the Circuit Breaker to Faulty Lines Protection Energised Short Circuit Protection Tripped Circuit Breaker Switch on Command 1 Manual On 2 Protection Tripped 1 2 The MRA...

Страница 20: ...ommand during the reclaim time leads to the switching off of the breaker Number of Reclosings Until Maintenance Alarm No M After a certain number of reclosings the circuit breaker must be serviced Thi...

Страница 21: ...he SELECT push button you can check all the unit set values Modification is via the UP and DOWN push buttons followed by ENTER 7 4 Checking the CB Status Input Circuit 28 15 Apply auxiliary voltage to...

Страница 22: ...2 Output Relays Number 5 Contacts 2 Voltage free changeover contacts for switch on relays 1 Voltage free change over contact for other relays 8 3 Setting Ranges and Steps Setting Parameter Setting Ran...

Страница 23: ...tection tripping command after reclosing and is interrupted by the CB Off Alarm C B Wait Time 100mS 10mS This time starts with the CB Off Alarm after an unsuccessful reclosing and is interrupted by th...

Страница 24: ...IEC 41B CO 38 Class 1 Vibration IEC 41B CO 35 Class 1 Degree of Protection Front IP52 Rear IP00 Weight Approx 2kg 8 5 Power supply Two auxiliary power supply versions are available Vaux 24V in a rang...

Страница 25: ...in close proximity and hazardous environments When the relay is inserted a leaf spring along the top edge of the module makes contact with a solidly bonded nickel plated steel strip on the interior of...

Страница 26: ...Each connection facilitates 2 pre insulated push on blades 4 8mm wide 0 8mm thick complying with BS5057 Combinations Each terminal will accept either 2 ring type connectors or 2 push on blade type co...

Страница 27: ...T C T CT Ratio LV side for example 3000 5A Rating Transformer maximum rating for example 2MVA H T C T CT Ratio HV side for example 150 5A 150 5 H T Flc Full load current HV side or rated voltage for...

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