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Summary of Contents for Cooper Low Impedance Bus Differential Relay M-LIB3
- Page 1 Protective Relays SALES AID S150-34-1 M-LIB3 Low Impedance Bus Differential Relay MODULAR LOW IMPEDANCE BUS PROTECTION TYPE M-LIB3 OPERATION MANUAL October 1999 1999 Cooper Industries, Inc. New Issue.
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Page 2: Table Of Contents
M-LIB3 Low Impedance Bus Differential Relay 1 General utilization and commissioning directions_______________________________________________________ 3 Storage and transportation______________________________________________________________________ 3 Installation___________________________________________________________________________________ 3 Electrical connection___________________________________________________________________________ 3 Measuring inputs and power supply_______________________________________________________________ 3 Outputs loading_______________________________________________________________________________ 3 Protection earthing_____________________________________________________________________________ 3 Setting and calibration__________________________________________________________________________ 3 Safety protection______________________________________________________________________________ 3 Handling____________________________________________________________________________________ 3 1.10 Maintenance_________________________________________________________________________________ 4 1.11 Fault detection and repair_______________________________________________________________________ 4... -
Page 3: General Utilization And Commissioning Directions
GENERAL UTILIZATION AND COMMISSIONING DIRECTIONS Always make reference to the specific description of the product and to the Manufacturer's instructions. Carefully observe the following warnings. 1.1 STORAGE AND TRANSPORTATION Must comply with the environmental conditions stated on the product's instruction or by the applicable IEC standards. -
Page 4: Maintenance
M-LIB3 Low Impedance Bus Differential Relay a. Before removing a module, ensure that you are at the same electrostatic potential as the equipment by touching the case. b. Handle the module by its front-plate, frame, or edges of the printed circuit board. Avoid touching the electronic components, printed circuit tracks or connectors. -
Page 5: General Characteristics And Operation
GENERAL CHARACTERISTICS AND OPERATION 1.12 Modular Low Impedance Bus Bar Protection M-LIB3 The M-LIB system is constituted of a number of modular units, which can be combined to suit to any busbar configuration and allow for easy extension. 1.13 Main features Low impedance and low burden on main CTS. -
Page 6: M-Bc3 = Bus Coupler / Sectionalizer Module (Sce1578)
M-LIB3 Low Impedance Bus Differential Relay 1.14.2 M-BC3 = Bus coupler / sectionalizer module (SCE1578) Including : sets of three auxiliary CTs : 1 set for each side of the bus coupler. 1 Bus coupler trip output. 1 Bus Coupler trip input from Feeders’ Breaker Failure Relays 1.14.3 M-LID3 = Numerical biased protection relay With the following features : Double circuit for Biased differential protection. -
Page 7: F/C Rack Panel
2.4 F/C Rack Panel 19” 3U rack panel suitable to house up to seven plug-in modules type M-BF3 or M-BC3 including back printed circuit board with : Diodes for supply of the measurement bus of two Main Zones and one Check Zone 7 Female sockets for plug-in connection of the M-BF3 or M-BC3 modules. -
Page 8: Accessoeries
M-LIB3 Low Impedance Bus Differential Relay 2.5 ACCESSORIES 2.5.1 CF1 – Cable with female plug Female connector plug with multicore cable for connection between the terminals of the protection relays and the Zone wiring bus. -
Page 9: Cfm - Interconnection Cable With Male An Female Plugs
S150-34-1 2.5.2 CFM – Interconnection cable with Male and Female plugs Multicore cable terminated with one male and one female connector plugs for interconnection between F/C Rack Panels. -
Page 10: Technical Data
M-LIB3 Low Impedance Bus Differential Relay 2.6 Technical Data Standards: IEC 255, 1000, CE Rated Frequency: 50/60 Hz Rated input current: 1 A Current overload: 2 In Transient overload: 100 In Setting ranges: = 50/60 Hz = zone differential current = (0,2-2) In R = Bias per Unit = (0,4 - 1) p.u. -
Page 11: Apparatus Configuration
APPARATUS CONFIGURATION The M-LIB3 modular protection apparatus is combined according to the configuration of the protected bus bar System. Generally the following components are needed : One M-LID3 differential relay for each of the protected bus bar zone. One M-LID3 differential relay for each Check Zone (normally one only). The M-LID3 relays can be supplied as individual flush mounting units or combined in 19”... -
Page 12: Single-Line Diagram
M-LIB3 Low Impedance Bus Differential Relay 3.1 SINGLE-LINE DIAGRAM SINGLE-LINE DIAGRAM... -
Page 13: Application Example
S150-34-1 3.2 Application example As an example a double busbar system with two zones 10 feeders and one bus coupler is considered:... - Page 14 M-LIB3 Low Impedance Bus Differential Relay...
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Page 15: Feeder Input Module M-Bf3
FEEDER INPUT MODULE M-BF3 M-BF3 is a 51mm wide draw-out modular unit to be plug-in into the F/C rack panel that can house up to 7 modules M-BF3 or M-BC3. With reference to the block diagram SCE1577 the module M-BF3 receives the measuring input from the three Feeder’... -
Page 16: Back Side
M-LIB3 Low Impedance Bus Differential Relay M-BF3 CARD Each of the 7 bays of the F/C panel can accept either one module M-BF3 or one module M-BC3 Current input burden (each module) : In = 1A : 0.5 VA – 0.5 In = 5A : (on request) Power supply consumption (each module) :... -
Page 17: Wiring Diagram M-Bf3
S150-34-1 4.1 WIRING DIAGRAM M-BF3 (SCE1577) -
Page 18: Feeder Input Module M-Bc3
M-LIB3 Low Impedance Bus Differential Relay BUS COUPLER INPUT MODULE M-BC3 M-BC3 is a 51mm wide draw-out modular unit to be plug-in into the F/C rack panel that can house up to 7 modules M-BC3 or M-BF3. With reference to the block diagram SCE1578 the module M-BC3 receives the measuring input from the two sets of the Bus Coupler’... - Page 19 M-BC3 CARD Each of the 7 bays of the F/C panel can accept either one module M-BF3 or one module M-BC3 Current input burden (each module) : In = 1A : 0.5 VA – 0.5 In = 5A : (on request) F/C PANEL BACK SIDE S150-34-1...
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Page 20: Wiring Diagram M-Bc3
M-LIB3 Low Impedance Bus Differential Relay 5.1 WIRING DIAGRAM M-BC3 (SCE1578) -
Page 21: Digital Low Impedance Differential Protection Relay M-Lid3
M-LID3 DIGITAL LOW IMPEDANCE DIFFERENTIAL PROTECTION RELAY TYPE M-LID3 dA> dB> PROG/ REMOTE I.R.F. TRIGGER SYNC. MICROELETTRICA SCIENTIFICA MILANO ITALY MODE SELECT LOW IMPEDANCE BIASED DIFFERENTIAL RELAY TYPE PROG. M-LID3 ENTER/RESET dC> BLOCK TIME INPUT S150-34-1... -
Page 22: General Characteristic
M-LIB3 Low Impedance Bus Differential Relay 6.1 GENERAL CHARACTERISTIC Currents from the CTs of the Feeders connected to each protected zone are conveyed to a wiring bus (one for each phase) that drives the positive and negative halfwave of the current on two different wires. The wiring bus also carries the signal from the CT’... -
Page 23: Operation Of The Biased Differential Elements
The signal from CT saturation detectors shunts the measurement for a time proportional to the saturation. This strongly contributes to stability during through faults while maintaining high sensitivity to internal faults. The operation logic in each phase is functionally explained in the following diagram. I >[I ] I >[I ] Operation of the main zone relay takes place if the following conditions exist:... - Page 24 M-LIB3 Low Impedance Bus Differential Relay To compensate the differential current produced by CT’ s error or saturation, the actual minimum operation level I is dynamically adjusted in function of the actual through current I [2R] Is/In • [1R] [I /In] [1I ] •...
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Page 25: Control And Measurements
6.5 CONTROLS AND MEASUREMENTS Five key buttons allow for local management of all of the relay's functions. An 8-digit high brightness alphanumerical display shows the relevant readings (xxxxxxxx) (see synoptic table fig.1) FIG.1 MODE SELECT ACT MEAS MAX VAL MEASURES LastTr-X Measurements display... -
Page 26: Measurements Acquisition And Operation Principle
M-LIB3 Low Impedance Bus Differential Relay SIGNALIZATIONS Eight signal LEDs (normally off) are provided: a) Red LED dA> b) Red LED dB> c) Red LED d) Red LED PROG/ e) Yellow LED I.R.F. Remote f) Red LED Trigger Time g) Red LED Sync. -
Page 27: Output Relays
6.7 OUTPUT RELAYS Five output relays are available (R1, R2, R3, R4, R5) The relays R1,R2,R3,R4 are normally de-energized (energized on trip): these output relays are user programmable and any of they can be associated to any of the M-LID3's functions. Any relay associated to of any function picks-up as soon as the measured input value gets into the operation zone. -
Page 28: Test
M-LIB3 Low Impedance Bus Differential Relay 6.11 TEST Besides the normal "WATCHDOG" and "POWERFAIL" functions, a comprehensive program of self-test and self-diagnostic provides : Diagnostic and functional test with checking of program routines and memory's content, run every time the aux. -
Page 29: Reading Of Measurements And Recorded Parameters
6.13 READING OF MEASUREMENTS AND RECORDED PARAMETERS Enter the MODE "MEASURE", SELECT the menus "ACT.MEAS"-"MAX VAL"-"LASTTRIP"- "TRIP NUM", scroll available information by key "+" or "-" . 6.13.1 ACT.MEAS Actual values as measured during the normal operation. The values displayed are continuously updated. Display xxxxxxx Current date in the DDMMMYY format. -
Page 30: Reading Of Programmed Setting And Relay' S Configuration
M-LIB3 Low Impedance Bus Differential Relay 6.14 READING OF PROGRAMMED SETTINGS AND RELAY'S CONFIGURATION Enter the mode "SET DISP", select the menu "SETTINGS" or "F menu by keys "+" or "-". SETTINGS= values of relay's operation parameters as programmed RELAY= output relays associated to the different functions as programmed. 6.15 PROGRAMMING The relay is supplied with the standard default programming used for factory test. -
Page 31: Programming The Configuration Of Output Relays
6.15.2 PROGRAMMING THE CONFIGURATION OF OUTPUT RELAYS This is the name This dash means of protective that output relay element number 1 is not assigned to this Mode PROG menu F RELAY The key "+" operates as cursor; it moves through the numbers corresponding to the four programmable relays in the sequence 1,2,3,4,(1= relay R1, etc.) and makes start flashing the information actually present in the digit. -
Page 32: Manual And Automatic Test Operation
In case of Internal Relay Fault detection, proceed as indicated : If the error message displayed is one of the following “ DSP Err” , “ ALU Err” ,” KBD Err” ,” ADC Err” , switch off power supply and switch-on again. If the message does not disappear send the relay to Cooper Power Systems (or its local dealer) for repair. -
Page 33: Clock And Calendar
6.18 CLOCK AND CALENDAR The unit features a built in clock calendar with Years, Months, Days, Hours, Minutes, Seconds, and Tenths of seconds and Hundredths of seconds. 6.18.1 Clock synchronization. The clock can be synchronized via a digital input (terminals 1 – 14) or the serial communication interface. -
Page 34: Wiring Diagram M-Lid3
M-LIB3 Low Impedance Bus Differential Relay 6.19 WIRNG DIAGRAM M-LID3 (SCE1579) -
Page 35: Electrical Characteristics
6.20 ELECTRICAL CHARACTERISTICS REFERENCE STANDARDS Dielectric test voltage Impulse test voltage Climatic tests CE EMC Compatibility (EN50081-2 - EN50082-2 - EN50263) Electromagnetic emission Radiated electromagnetic field immunity test Conducted disturbances immunity test Electrostatic discharge test Power frequency magnetic test Pulse magnetic field Damped oscillatory magnetic field Electrical fast transient/burst HF disturbance test with damped oscillatory wave (1MHz... - Page 36 M-LIB3 Low Impedance Bus Differential Relay This page intentianally left blank.
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