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Seg MRD1-G Manual

Generator differential protection system
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MRD1-G
Generator Differential Protection System
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Summary of Contents for Seg MRD1-G

  • Page 1 MRD1-G Generator Differential Protection System...

  • Page 2: Table Of Contents

    5.1.4 LEDs V01-1.03. 5.1.5 VIEW mode / EDIT mode 5.1.6 OFFLINE-TEST mode 5.1.7 Reset (DEVICE RESET) 5.1.8 Enter password 5.1.9 Password forgotten SYSTEM settings 5.2.1 Selection 5.2.2 Overview 5.2.3 Time / Date 5.2.4 Password change PARAMETER-pages TB MRD1-G 11.01 E...
  • Page 3 • MRD1-T3 Transformer differential protection for also of modular structure. Each protection function is al- located to a special program segment and so it is three-winding transformers • MRD1-G Differential protection for generators and possible to subsequently add further functions. motors TB MRD1-G 11.01 E...
  • Page 4 • Three possibilities for relay resetting • Indication of relay function optically or via separate selfsupervision relay • All data interfaces galvanical isolated • Rated frequency selectable: 50 Hz/60 Hz • Parameter setting protected by password TB MRD1-G 11.01 E...
  • Page 5 PC interface. play: To connected MRD1 and PC a 1:1 modem-cable with 9-pole plug-and-socket is used. By using SEG software • Date / Time / Relay type (Home Position) HTLSOFT 3, which is Windows compatible, MRD1 •...
  • Page 6 MRD1 and the host computer. vices. This interface operates at a constant transmission ratio of 9600 Baud if |SEG protocol "RS485pro" is used. Via RS485 interface all measured operational and b) can logically be interlinked with MRD1 internal pro- fault data as well as operational status indications can tection functions.

  • Page 7: Basic Module

    (see chapter 5). Two of these four relays are provided with two changeover contacts each and the other two with one changeover contact each. TB MRD1-G 11.01 E...

  • Page 8: Working Principle

    “m” is measured to be greater than zero. This is to give a basic stabilization after detection of inrush or ct-saturation during external fault by means of harmonic measurement. Pickup characteristic This characteristic defines the stabilizing current dependence on the pickup current Table 1: Term definitions TB MRD1-G 11.01 E...
  • Page 9 Due to the chosen direction of the reference arrow, current I flows here in negative direction. The differential relays detects a current difference of = Id and trips when Id has exceeded the set threshold. TB MRD1-G 11.01 E...
  • Page 10 In case of harmonics of 4 or 5 order in the differential current the characteristic curve is raised up statically by the parameter d[Id] and dynamically by the measuring value m (characterizes the harmonic contents). TB MRD1-G 11.01 E...
  • Page 11 75 % of the present characteristic trip value in order for the energized condition to be reset. The total tripping time of the Relay is below 35 ms. TB MRD1-G 11.01 E...

  • Page 12: Analogue Measured Value Detection

    MRD1 and the outside world is also controlled by the main processor. This does not only mean control of in- dications or handling of key inputs but also harmoniz- ing the different data interfaces as well as control of output relays. TB MRD1-G 11.01 E...

  • Page 13: Block Diagram

    Bus1 memory CAN- parameter- con- memory tro- ller Bus2 serial PC-interface RS232 optional TB MRD1-G 11.01 E...

  • Page 14: General Functions

    The longest stored data is overwritten when a new incident occurs. Complete data of altogether 5 inci- dents can always be called off. More information on storage capacity and calling off re- corder data via keyboard can be found in chapter 5. TB MRD1-G 11.01 E...

  • Page 15: Self-Test

    • all relays energize one after the other (with LED) • relays return to actual position • self-test relay energizes Memory test Test of software and memory by checking the pro- gram check sum remains active TB MRD1-G 11.01 E...

  • Page 16: Output Relay Settings

    0,20 0,20 0,20 0,20 0,20 0,20 0,20 0,20 0,20 (in s) Custom setting • Setting range: 0 -...1,00 s or exit (=latching- contact un- til a DEVICE RESET is performed) ST=Self-Test relay • = no selection TB MRD1-G 11.97 E...

  • Page 17: Parametrizing Blocking

    The MRD1 offers 5 output relays. Relay number 5 is preassigned to the selftest function of the relay and is working with zero-signal current principle. Output relays 1 – 4, and 6 – 10 are open-circuit relays and can be assigned to internal logic functions. TB MRD1-G 11.01 E...

  • Page 18: Operation

    1.2 measurement 2.2 work set selection LED test parameter 1.3 measurement 3.3 OFFLINE TEST m. memory test change password restore default rated frequency SYSTEM- TEST- PARAMETER measurements parameter routines data recorder Fig. 5.1: Data organization TB MRD1-G 11.01 E...

  • Page 19: Parameter Sets

    All changes are then jointly read- Another switch (Work Set) defines on which of the data sets the protection program is based. All switches are adjusted via software. OFFLINE TEST mode is specified in chapter 5.1.6. TB MRD1-G 11.01 E...

  • Page 20: Key Function

    "long" on them have to be pressed for about 2s for actuating the function. If there is nothing stated, the respective key has only to be pressed briefly. Fig.: Display in HOME POSITION TB MRD1-G 11.01 E...

  • Page 21: Leds

    • Relay blocked green • Protection o.k. (selftest relay on) SELFTEST red • System initialization (after power on) red flashing a • OFFLINE TEST mode / Relay-TEST. no protec- tion, only messages off • Internal fault. no protection TB MRD1-G 11.01 E...

  • Page 22: View Mode / Edit Mode

    (which is calculated from rated voltage and power capacity setting) an the setted CT primary rated current. TB MRD1-G 11.01 E...

  • Page 23: Offline-Test Mode

    In order to prevent dangerous conditions, the generator must either have a sufficient backup protection or has to be switched off. After an intended OFFLINE TEST this mode must be dis- abled so that protection is ensured again. TB MRD1-G 11.01 E...

  • Page 24: Enter Password

    Also after storing or cancelling, editing authority be- comes invalid. Hence it is very important that the relay is only left after LED EDIT has extinguished to prevent unau- thorized change of settings. TB MRD1-G 11.01 E...

  • Page 25: System Settings

    • Enter password if requested • If necessary: select setting with the +/- keys. On setting date/time the arrow keys (up/down) are used to scroll to the next value. Press ENTER to get new time valid. TB MRD1-G 11.01 E...

  • Page 26: Overview

    The device switches to OFFLINE TEST mode automatically!  clear event recorder   clear fault recorder  Table: SYSTEM settings page, overview To change any setting or start an operation press " Select with cursor and while shown in display. TB MRD1-G 11.01 E...

  • Page 27: Time / Date

    The internal clock does not stop during the setting procedure so that when cancelled by RESET key the actual time is not changed. After pressing ENTER the modified time becomes valid. TB MRD1-G 11.01 E...

  • Page 28: Password Change

     enter new password again    " changing done  " The new password wouldn’t be  typed 2 times identically Try again " message appears for app. 2 s Table: Password change, procedure TB MRD1-G 11.01 E...

  • Page 29: Parameter

    • Keep modifications and leaf to next page (PARA short) • Cancel modification of the displayed value (RESET short) • Storage of changed parameters (ENTER long) • Finish working and refuse all modifications, no store (RESET long) TB MRD1-G 11.01 E...
  • Page 30 +/- keys in a edit session the password is asked. To view only parameter settings the PARA key is used to leaf to the next page and the UP/DOWN keys are used to select the parameter. TB MRD1-G 11.01 E...
  • Page 32 Generator nominal current (or motor nominal current) Differenzstrom differential current Id / In Idiff >> Idiff (Is/In=10) d[Id] Einstellbereich der Kennlinie setting range of characteristic Idiff (Is/In=2) Idiff (Is/In=0) Stabilisierungsstrom stabilizing current Is / In Fig: Possible setting range of the characteristic TB MRD1-G 11.97 E...
  • Page 37 Scheme: TB MRD1-G 11.97 E...

  • Page 39: Validity Check

    (phase-to-phase voltage) rated component current (I /(√3 x U )) calculated from U and S set rated C.T. primary current Gradient characteristic gradient in the respective linear sector (see chapter 5.3.4) TB MRD1-G 11.97 E...
  • Page 40 TB MRD1-G 11.01 E...

  • Page 41: Data

    1.3 [ value ] Fault Rec Event Rec DATA Data recorder (last but one) recorder time date event value 1 value 2 select a stored value ..FAULT EVENT I DIFF> TRIP Fig.: Data pages, organization TB MRD1-G 11.01 E...

  • Page 42: Overview

    Trip message, date / time ,  measurements  calculated measurements Recall event messages Message text  date / time  Recall statistic Data Operating hours  Trip counter  Alarm counter Table: Data pages, overview TB MRD1-G 11.01 E...

  • Page 43: Measured And Calculated Data

    Actual measuring value of the phase current L1  MA=Mains side in A  corresponding to L2   corresponding to L3  etc. Phase current in A (SP=Star point side) calculated difference current (Idiff) calculated stabilizing current (Irestr) Table: Operational measured data TB MRD1-G 11.01 E...

  • Page 44: Fault Recorder

    Reason of the trip   Date of trip   Time of trip   Current L1 of winding 1 in A  etc. corresponding for all stored datas Table: Data of a fault recorder TB MRD1-G 11.01 E...

  • Page 45: Event-Recorder

    “ at the end of the list. Table: Event-Recorder Display Value  next value Event number and event mes- e.g. last event  sage  Date of event   Time of event  Table: Message and time / date TB MRD1-G 11.01 E...

  • Page 46: Statistic Data

    5.4.6 Statistic data Display Value  next value Headline   MRD1 Operating hours   Trip counter   Alarm counter  Table: Statistic data Note Note Note Note This statistic counters can not be resetted. TB MRD1-G 11.01 E...

  • Page 47: Test-Routines Page (Self-Test)

    TEST-routines page (Self-test) 5.5.1 Page selection Page select Display   password access select test TEST- routines test 1 test is running test 2 test 2 test 3 start test TB MRD1-G 11.01 E...

  • Page 48: Overview

    Memory / program test: Test  This routine will test the memory and the program by calculating a checksum. " NOTE: Password is needed, because the protection function is disabled during the test! Table: Implemented test routines TB MRD1-G 11.01 E...

  • Page 49: Parameter Programming Help

    6 with a separately ENTER press. if necessary: repeat step 6 and 7 as long as needed change displayed value leaf to next page continue at step 5 TB MRD1-G 11.01 E...
  • Page 50 There is no need to confirm any modification by pressing ENTER. All modifications are temporarily stored in the edit memory when scrolling with up/down keys. When pressing ENTER long all modifications in the edit memory will be stored in the parameter set memory after an ensurance request. TB MRD1-G 11.01 E...

  • Page 51: Relay Tests

    W1= Mains side, W2 = Star point side, LFG= (e.g.) |SEG Power Function Generator NOTE for relay tests: • Stated accuracies apply to rated values • Currents must be free of harmonics •...

  • Page 52: Check List

    Does LED SELF-TEST light up green and is Selftest relay energized ? Device tests Selftest routines - Lamptest - Test of the output relays - Checksum test - Test of the working parameter set in OFFLINE TEST mode TB MRD1-G 11.01 E...

  • Page 53: Connection

    MRD1 that way as if 1/3 x I each flow into the faulty phase. Thus the resulting differential current is 2/3 x I. TB MRD1-G 11.01 E...

  • Page 54: Technical Data

    < 0.1 % at I < 0.1 % at 64 × I Accuracy 0.05×I <2% (related to the measured value) 1×I <1% 15×I <2% Operating time 25-30 ms C.T. requirements: recommended min. requirements to expoit device accuracy 5P20 TB MRD1-G 11.01 E...
  • Page 55 30x10 switching points Rated insulation voltage: 600 VAC (450V DC / 380 VAC) (VDE 435, T303) Air- and creeping distance VDE 0160 Insulation coordination: pollution degree 3 for terminals, pollution degree 2 for the electronic TB MRD1-G 11.01 E...
  • Page 56 Class 1 as per DIN IEC 255 T 21-2 Vibration: Class 1 as per DIN IEC 255 T 21-1 Degree of protection: Front IP40 Overvoltage class: Setting ranges: s. tables chapter 5 and 10 GL-Approbation: 99 360-97 HH TB MRD1-G 11.01 E...

  • Page 57: Tables / Connection Diagrams

    Offline-Test-Mode is active  Offline-Test-Mode is not active  Fault recorder is cleared  Event recorder is cleared  System start / device initialization  Time/date setting was changed (old time)  Time/date setting was changed (new time) TB MRD1-G 11.01 E...

  • Page 58: View

    Base module output Relays SEG MRD1 RWI D reset- and blocking input CAN1 auxiliary voltage RS485 CAN2 earth connection RS-485-port output Relays digital inputs measuring inputs CAN-Bus A column: Star point side B column: Grid side TB MRD1-G 11.01 E...
  • Page 59 Fig.: Connection diagram MRD1-G Technical data subject to change without notice ! TB MRD1-G 11.01 E...

  • Page 60: Type Code

    " necessary rack for the single components Note Note Note Note Normally the MRD1 is provided with one type of current transformer only (1A or 5A). Equipment with two CTs of different current ratings in one relay only on request. TB MRD1-G 11.01 E...

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