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Summary of Contents for Seg MRD1-T
- Page 1 MRD1-T Transformer Differential Protection System...
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Page 2: Table Of Contents
Possible event messages 5.1.4 LEDs View 5.1.5 VIEW mode / EDIT mode 5.1.6 OFFLINE-TEST mode 10 Type code 5.1.7 Reset (DEVICE RESET) 5.1.8 Enter password 5.1.9 Password forgotten This technical manual is valid for software version V01-1.03. TB MRD1-T 10.01 E... -
Page 3: Preface And Application
The MRD1 software is motors also of modular structure. Each protection function is al- located to a special program segment and so it is possible to subsequently add further functions. TB MRD1-T 10.01 E... -
Page 4: Features And Benefits
• Indication of relay functions optically or via sepa- rate self supervision relay • Three possibilities for relay resetting • All data interfaces galvanical isolated • Rated frequency selectable: 50 Hz/60 Hz • Parameter setting protected by password TB MRD1-T 10.01 E... -
Page 5: Design
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: Master Module
(open or closed) of external protection de- This interface operates at a constant transmission ratio vices (e.g. Buchholz relay at transformers) of 9600 Baud if |SEG interface recorder "RS485pro" is used. Via RS485 interface all measured operational and fault data as well as operational status indications b) can logically be interlinked with MRD1 internal pro- can be read out - identical to RS232 interface. -
Page 7: Basic Module And Additional Module
The voltage applied for resetting must be within the permissible high-range (see technical data), although it the tertiary winding of the transformer and it provides also five additional output relays. must not necessarily be identical with the latter. TB MRD1-T 10.01 E... -
Page 8: Working Principle
Pickup characteristic In this characteristic both stabilizing quantities (stabilizing current and stabilizing factor) are brought together and from this the pickup current is defined necessary for the operational condition of the object to be protected at that instant. Table 1: Term definitions TB MRD1-T 10.01 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 I = Id and trips when Id has exceeded the set thresh- old. TB MRD1-T 10.01 E...
- Page 10 Calculation of the differential current and stabilizing current resulting from the fundamental oscillation of the input and output currents (current of the negative and positive phase sequence system) produces a point on the charac- teristic. If this point is within the tripping range, the output relay picks up. TB MRD1-T 10.01 E...
- Page 11 During the time the core is not saturated, the CT induces a current which does not represent the real current for the entire cycle duration, its effective value is far too low. TB MRD1-T 10.01 E...
- Page 12 III. Differenzstrom differential current Id / In AUSLÖSUNG TRIP Idiff >> (Für interne Fehler) (for internal faults) KEINE AUSLÖSUNG NO TRIP d[Id] Stabilisierungstrom stabilizing current Is / In Fig. 6: Dynamic stabilized trip characteristic (pick-up value). TB MRD1-T 10.01 E...
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Page 13: 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-T 10.01 E... -
Page 14: Block Diagram
Bus1 memory CAN- parameter- con- memory tro- ller Bus2 serial PC-interface RS232 optional TB MRD1-T 10.01 E... -
Page 15: General Functions
FIFO memory. The longest stored data is overwritten when a new incident occurs. Complete data of alto- gether 10 incidents can always be called off. More information on storage capacity and calling off recorder data via keyboard can be found in chapter 5. TB MRD1-T 10.01 E... -
Page 16: 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-T 10.01 E... -
Page 17: 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 range: 0 -...1,00 s or exit (=latching- contact un- til a DEVICE RESET is performed) ST=Self-Test relay • = no selection TB MRD1-T 10.01 E... -
Page 18: 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-T 10.01 E... -
Page 19: 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-T 10.01 E... -
Page 20: Parameter Sets
All changes are then jointly read-in. 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-T 10.01 E... -
Page 21: Key Function
Keys with the term "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 Fig.: Display in HOME POSITION pressed briefly. TB MRD1-T 10.01 E... -
Page 22: 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-T 10.01 E... -
Page 23: View Mode / Edit Mode
(which is calculated from rated voltage and power capacity setting) an the setted CT primary rated current. TB MRD1-T 10.01 E... -
Page 24: Offline-Test Mode
In order to prevent dangerous conditions, the trans- former must either have a sufficient backup protection or has to be switched off. After an intended OFFLINE TEST this mode must be disabled so that protection is ensured again. TB MRD1-T 10.01 E... -
Page 25: Enter Password
Also after storing or cancelling, editing authority be- comes invalid. Hence it is very important that the re- lay is only left after LED EDIT has extinguished to pre- vent unauthorized change of settings. TB MRD1-T 10.01 E... - Page 26 TB MRD1-T 10.01 E...
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Page 27: 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 value valid. TB MRD1-T 10.01 E... -
Page 28: 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-T 10.01 E... -
Page 29: 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-T 10.01 E... -
Page 30: 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-T 10.01 E... -
Page 31: Parameter
• Keep modifications and leaf to next page (PARA short) • Cancel modification of the displayed value (RESET short) • Finish working, accept all modifications and store (ENTER long) • Finish working and refuse all modifications, no store (RESET long) TB MRD1-T 10.01 E... -
Page 32: Overview
+/- 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-T 10.01 E... -
Page 35: Protection Parameters
Transformer 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-T 10.01 E... - Page 40 Scheme: TB MRD1-T 10.01 E...
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Page 42: Validity Check
(phase-to-phase voltage) / √3 x U rated component current (I )) 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-T 10.01 E... -
Page 43: 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-T 10.01 E... -
Page 44: 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-T 10.01 E... -
Page 45: Measured And Calculated Data
etc. Phase current in A (all phases, all windings) calculated difference current (Idiff) " calculated stabilizing current (Irestr) " calculated stab. factor (harm restr.) Table: Operational measured data " related to the transformer nominal current TB MRD1-T 10.01 E... -
Page 46: 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-T 10.01 E... -
Page 47: 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-T 10.01 E... -
Page 48: 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-T 10.01 E... -
Page 49: 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-T 10.01 E... -
Page 50: 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-T 10.01 E... -
Page 51: 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-T 10.01 E... - Page 52 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-T 10.01 E...
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Page 53: Relay Tests
• Rated data parameters must be adjusted for a transformer of vector group Yy0 • The settings of the primary nominal current of the CTs and the nominal voltages for all windings must be the equal (transmission ratio 1:1). • LFG = |SEG-Power Function Generator TB MRD1-T 10.01 E... -
Page 54: Commissioning
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-T 10.01 E... -
Page 55: 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-T 10.01 E... -
Page 56: 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-T 10.01 E... - Page 57 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-T 10.01 E...
- Page 58 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-T 10.01 E...
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Page 59: 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-T 10.01 E... -
Page 60: View
RS485 CAN2 earth connection RS-485-port output Relays digital inputs measuring inputs measuring inputs CAN-Bus B column: W3 (low voltage side) A column: W 2 (low / medium voltage side) B column: W 1 (high voltage side) TB MRD1-T 10.01 E... - Page 61 Important Note. For perfect functioning of the rush stabilization system it is essential that the MRD-T is connected in the cor- rect phase sequence, i.e. that there is a positive rotating field. Refer also to page 11. TB MRD1-T 10.01 E...
- Page 62 The System W1 is assigned to the high voltage side.If the voltages in the systems W2 and W3 are differ- ent, the system W3 must be assigned to the lower voltage level. Technical data subject to change without notice! TB MRD1-T 10.01 E...
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Page 63: 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-T 10.01 E... - Page 64 TB MRD1-T 10.01 E...
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