User Manual
Contents
1. 52 9 Appendix 10 Appendix B ire iere exe ke e 55 Chapter 1 1 ntroduction MK2200 is a digital microprocessor based numerical combined overcurrent and earth fault relay It employs extensive advanced numerical technique implemented real time for the computation of fault currents and the execution of intended protection functions Power indicator Numeric display Pickup indicator Trio indicator Program key Overcurrent And Earth fault Relay 2200 Functions gt v Down key indicators RESET STEP Switch key Reset Step key Figure 1 1 Front view of MK2200 MK2200 is housed in an aluminum case suitable for panel mounting The transparent polycarbonate front panel cover provides IP54 degree of protection against splashing water besides acting as a sealed cover against tampering or unauthorised changes to the settings of the relay Fully digital user interface with large and bright seven segment LED display indicators and push button switches give a very user friendly access to the status settings and recorded information of the relay The relay can have up to 4 current transformer CT inputs with the CTs ratio of either 5A or 1A An optically isolated digital input can be programmed as changeover input for protection group settings remote reset input blocking input or external tripping input Five programmable output contacts can response to rel2. SWITCH Pressing this SWITCH key allows the selection the Soft Switches by the user Programming the Protection Functions The following steps are for the programming of Low set overcurrent I gt e Low set time multiplier time delay K t gt e High set overcurrent gt gt High set time delay t gt gt e Low set earth fault lo e Low set time multiplier time delay K to gt High set earth fault lo gt gt High set time delay to gt gt 23 Step 1 Select the function to be programmed by repeatedly pressing the STEP key The corresponding function indicator lights up Step 2 Press the PROGRAM key once and the indicator adjacent to the PROGRAM key lights up This indicates that the relay is now in programming mode Simultaneously one of the function indicators blinks to indicate that the particular function is selected for programming PROGRAM Step 3 Use the UP or DOWN key to select the desire value 5 Step 4 save the selected modified value press the PROGRAM key once light indicator adjacent to the PROGRAM key turns off and the selected function indicator stops blinking To abort without saving the modified value press the STEP key PROGRAM 24 3 11 Programming the Soft Switches The following steps are for programming the Soft Switches Step 1 Press the SWITCH key and the light indicator adjacent to the SWITCH key lights up Repeatedly pressing the
3. 300s step 1 50 Communication Hardware interface Isolated RS485 ii Protocol Modbus RTU iii Baud rate 300 600 1200 2400 4800 9600 19200 51 Chapter 8 Test and Standards Insulation Tests High voltage dielectric withstand test IEC60255 5 2 kVRMS 1 minute High voltage impulse test 60255 5 5 1 2 50 ms EMC Tests Immunity Electrostatic discharge immunity ae IEC 61000 4 2 IEC 60947 2 8 kV air discharge 8 kV contact discharge Radiated EM field immunity I 80 1000 MHZ IEC 61000 4 3 IEC 60947 2 1 4 2 0 GHz 5 50 ns 5 kHz 4 kV AC input power port U gt 100 VAC 2 kV signal ports 1 2 50 8 4 AC input power port line to line 4 kV AC input power port line to earth 1 kV signal ports line to line Modbus RTU 2 kV signal ports line to earth Modbus RTU 1 MHz ringing wave IEC60255 22 1 0 5 s 100 kHz IEC60694 1 0 kV AC input power port line to line 2 5 kV AC input power port line to earth 1 0 kV signal port line to line Modbus Electrical Fast Transient immunity IEC 61000 4 4 IEC 60947 2 Surge transient immunity IEC 61000 4 5 IEC 60947 2 Damped oscillatory wave 61000 4 12 IEC 60255 22 1 IEC 60694 RTU 2 5 kV signal port line to earth Modbus RTU RF Conducted immunity 0 15 80 MHz 1 kHz 80 AM IEC 61000 4 6 IEC 60947 2 10 V AC input power port Current dips No tripping allo
4. CT input for lo 13 External digital input 14 External digital input 15 to 21 Not used 22 Termination resistor for RS485 23 RS485 negative terminal 24 RS485 positive terminal 25 Communication cable shield 26 27 Output contact R5 28 N C contact for IRF 29 N O contact for IRF 30 COMMON contact for IRF 31 Casing earth terminal 32 Auxiliary supply input No polarity 33 Auxiliary supply input No polarity 34 N C contact for tripping contact R1 35 contact for tripping contact R1 36 COMMON contact for contact R1 37 38 Output contact R2 39 40 Output contact R3 41 42 Output contact R4 45 Connection Diagrams 5 2 Example 1 Typical connection diagram External Digital Input Uaux 25 Trip Contact R1 R2 R3 R4 R5 Internal Relay Failure TerminationResistor N RS485 RO Communication cableshield 46 Example 2 Typical connection diagram Trip Contact R1 i NEN Internal External Relay Digital Failure Input 22 Term inationResistor Uaux n o Communication cable shield 47 Chapter 6 Case Dimension 129 1 Panel Cutout 139 1 mm 142 Front 165mm 48 Chapter 7 Technical Data Input Measuring inputs Rated current In 1A or 5A Thermal withstand capability 4 x In continuous 25 X Infor less than 10 sec 100 x for less than 1 sec Model MK2200 150D 24 150VDC M
5. Group B The overcurrent setting is expressed as ratio of Isetting Iratea Examples PU EU GroupA Setting Value80 GroupB Setting Value 10096 gt Kt When this item is selected depending on the settings of Soft Switch 8 and 9 the right section of the four digit display shows either the low set overcurrent time multiplier or the low set overcurrent definite time delay The left section of the four digit display shows whether the selected setting is for Group A or for Group B When definite time delay is chosen the unit of measurement is second 18 gt gt gt l When this item is selected the four digit display shows the high set overcurrent setting of the relay The left section of the four digit display indicates whether the setting is for Group A or for Group B and the right section indicates the corresponding high set overcurrent setting for either Group A or Group B The overcurrent setting is expressed as ratio of Isetting Iratea gt gt gt When this item is selected the four digit display shows the high set overcurrent definite time delay The left section of the four digit display shows whether the selected setting is for Group A or for Group B The unit of measurement is in second gt lo gt In When this is selected the four digit display shows the low set earth fault setting of the relay The left section of the four digit display indicates whether the setting is for Group A or for
6. SWITCH key until the desired switch number appears on the display J Switch Switch Setting Number Step 2 Press the PROGRAM key once and the indicator adjacent to the PROGRAM key lights up This indicates that the relay is now in programming mode for Soft Switches The blinking switch number on the four digit display indicates the Soft Switch selected PROGRAM lu Step 3 Use the UP or DOWN key to select the desire value n 25 Step 4 To save the modified Soft Switch press the PROGRAM key once The light indicator adjacent to the PROGRAM key turns off and the switch number stops blinking To abort without saving the modified value press the STEP key or the SWITCH key PROGRAM 26 Chapter 4 Soft Switches This Chapter describes the functions of all the Soft Switches The following convention is used for the descriptions Digit2 Digit p Switch Switch Number Value Soft Switches are used for the following functions e Toset system frequency 60Hz or 50Hz e To configure MK2200 s output contacts R1 R2 R3 R4 and R5 To configure the IDMT characteristic curves for low set overcurrent and earth fault To disable the high set overcurrent and earth fault To enable Circuit Breaker Failure Protection function To configure the digital input To configure Modbus RTU serial communication Soft Switch 1 This Soft switch is for enabling or disabling the high set elements of overcurr
7. to activate the output contacts R2 to R5 which are user programmable to response to the start signal from high set earth fault element through Soft Switches 2 to 5 respectively Simultaneously the START indicator on the relay panel light up to indicates that the relay picks up After a delay time longer that the set gt gt the MK2200 then generates a trip signal to activate the output contacts R2 to R5 which are user programmable to response to the trip signal from high set earth fault element through Soft Switch 2 to 5 respectively The TRIP indicator blinks to indicate that the relay has trip signal can either be instantaneous without any intentional delay or a fixed time delay settable through gt gt NOTE This high set element can be disabled through Soft Switch 1 2 3 2 4 Circuit Breaker Failure Protection 50BF MK2200 has an in built circuit breaker failure protection CBFP function selectable through Soft Switch 1 If CBFP is selected it generates a tripping signal via contact output R2 after a pre set time delay as shown in Fig 2 2 if the fault has not been cleared after the activation of tripping signal through contact output R1 The CBFP output R2 is usually used to trip the upstream circuit breaker or to trip a redundant tripping circuit of the same circuit breaker The pre set breaker failure timer 62 can be set between 120ms 150ms or 200ms Since R2 is the dedicated CBFP output Soft Switch 2 CAUTION set
8. 100 64 15 58 3A 101 65 16 10 59 3B 102 66 17 11 60 36 103 67 18 12 61 3D 104 68 19 118 62 SE 105 69 20 14 63 106 6A 21 64 40 107 6B 22 16 65 41 108 6C 23 ilr 66 42 109 6D 24 18 67 43 110 6E 25 19 68 44 111 6F 26 1A 69 45 112 70 27 1B 70 46 113 28 1G 71 47 114 72 29 1D 72 48 115 Ue 30 73 49 116 74 31 74 4 117 32 20 75 4B 118 76 33 21 76 4C 119 Tt 34 22 77 4 120 78 35 23 78 4 121 79 36 24 79 4F 122 37 25 80 50 123 7B 38 26 81 124 ZO 39 2 82 52 125 7D 40 28 83 59 126 41 29 84 54 127 AR 42 2A 85 55 43 2B 86 56 55
9. 2 1 Cold load pick up 6 2 2 2 2 1 2 2 2 Earth Fault Protection 50N 51N Earth fault protection elements comprise of one low set stage and one high set stage Low set Earth Fault Element During a fault condition if the earth fault element exceeds the threshold of low set earth fault setting gt the MK2200 generates a start signal to activate the output contacts R2 to R5 which are user programmable to response to the start signal from low set earth fault element through Soft Switches 2 to 5 respectively Simultaneously the START indicator on the relay panel light up to indicates that the relay picks up After a delay time longer than the set t gt the MK2200 then generates a trip signal to activate the output contacts R2 to R5 which are user programmable to response to the trip signal from low set earth fault element through Soft Switch 2 to 5 respectively The TRIP indicator blinks to indicate that the relay has tripped Depending on the Soft Switch 8 and Soft Switch 9 settings the time delay between the start signal and trip signal can either be a fixed time delay or a variable time delay inversely proportional to the fault current This variable time current delay characteristic is in accordance with IEC 60255 3 standard for inverse definite minimum time IDMT curve High set Earth Fault Element If the earth fault exceeds the threshold of high set earth fault setting gt gt the MK2200 generates a start signal
10. Group B and the right section indicates the corresponding low set earth fault setting for either Group A or Group B The earth fault setting is expressed as ratio of lsetting lrated gt Kto When this item is selected depending on the settings of Soft Switch 8 and 9 the right section of the four digit display shows either the low set earth fault time multiplier or the low set earth fault definite time delay The left section of the four digit display shows whether the selected setting is for Group A or for Group B When definite time delay is chosen the unit of measurement is second gt lo gt gt l When this item is selected the four digit display shows the high set earth fault setting of the relay The left section of the four digit display indicates whether the setting is for Group A or for Group B and the right section indicates the corresponding high set earth fault setting for either Group A or Group B The earth fault setting is expressed as ratio Of Isetting lratea gt to gt gt When this item is selected the four digit display shows the high set earth fault definite time delay The left section of the four digit display shows whether the selected setting is for Group A or for Group B The unit of measurement is in second 19 3 3 3 4 gt Input This indicator mimic status of the digital input of MK2200A regardless of the Soft Switch A setting This indicator lights up when the input is active volt
11. Switch A Group gt lo gt gt lo gt any o o fo Binary Default setting 0 Hexadecimal User s setting Binary User s setting Hexadecimal SA 0 When selected this switch blocks the ow set earth fault element from operation 1 Enable the blocking function 0 Disable the blocking function SA 1 When selected this switch blocks the high set earth fault element from operation 1 Enable the blocking function 0 Disable the blocking function 38 SA 2 When selected this switch blocks the ow set overcurrent element from operation 1 Enable the blocking function 0 Disable the blocking function SA 3 When selected this switch blocks the high set overcurrent element from operation 1 Enable the blocking function 0 Disable the blocking function SA 4 When selected the digital input switches the protection settings between Group A and Group B If the digital input is in the ON state Group B settings is selected otherwise Group A settings is selected The digital input is in the ON stage if appropriate voltage appears between the two input terminals 1 Enable the group switching function 0 Disable the group switching function SA 5 When selected the digital input becomes the remote reset input for MK2200 when MK2200 trips 1 Enable remote reset function 0 Disable remote reset function SA 6 When selected an active digital input initiates a tripping ca
12. V c V 2 Manual Combined Overcurrent and Earth Fault Relay Overcurrent And Earth fault Relay PROGRAM SWITCH RESET STEP 2200 2 1 040413 NOTICE About This Edition The information in this guide applies to Model MK2200 Revision A For continuous improvement we reserve the right to supply equipment which may vary from that described in this manual without prior notice Mikro shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Copyright Mikro MK2200 ver 2 1 Copyright 2013 This document may not be photocopied reproduced or translated to another language without prior written consent of Mikro CAUTION This equipment shall be installed operated serviced and maintained only by qualified personnel No responsibility is assumed by Mikro for any consequences arising out of the use of this material This equipment is intended for indoor installation and use only If outdoor installation is required it must be mounted in housing having 54 classification of degree of protection SAFETY AND WARNING INFORMATION Please read this Safety and Warning Information carefully This information is intended to ensure that the equipment is properly handled installed operated and maintained in a safe condition Symbols and Conventions Used in this Manual Shock hazar
13. age source connected across Terminal 13 and Terminal 14 Display under Normal Non tripped Condition When MK2200A is switched on the AUX indicator lights up and a lamp test on the four digit display is performed After that the decimal point on the left most digit blinks indicating that the relay is functioning normally xl E Blinking If the relay was previously switched off after tripping NOTE without resetting the display will resume the previous trip state during subsequent power up One or more of these indicators blinks to indicate the cause of tripping Display under Start Condition When any of MK2200 s protection elements pickup the following indicators light up START This indicator shows the relay has started gt lu gt 1 or more of these indicators blinks to indicate the cause of starting P lu gt lo 20 3 5 Display under Trip Condition When MK2200 trips the following indicators light up TRIP This indicator shows the relay tripped gt lu du One or more of these indicators blinks to indicate the cause of dis tripping gt lo Blinking display indicates the tripping current 3 6 The RESET STEP Key RESET STEP This key has the following three functions a the relay when tripped b reset the output contacts which are configured to response to relay start and as manually reset contacts c Function selection when the rel
14. ay is in non trip conditions 21 3 7 The sequence of function selection by pressing the Reset Step key is as the flow diagram below Group gt gt Group Io gt gt In Group B Kto gt Other IL2 Record Group A Kto gt Other Record Group B Io gt In Group A Io gt In Other Record Other Io Record Group B t gt gt Group B I gt gt In Group A I gt gt In Figure 3 1 The sequence of function selection Use UP or DOWN key The PROGRAM Key PROGRAM Once the desired function or Soft Switch has been selected by the STEP key or the SWITCH key and the selected item is programmable pressing the PROGRAM key enables the programming mode for the selected item The value or setting of the selected item can then be changed by pressing the UP or DOWN key Pressing the PROGRAM key again while in the programming mode will cause the relay to exit the programming mode with the new value or setting saved into a non volatile memory 27 3 8 3 9 3 10 The UP and DOWN Keys A v When in programming mode pressing these keys change the value or setting of the selected item MK2200 has a maximum of nine fault records If the UP or DOWN key is pressed when viewing these records it move to the previous or next record respectively Press and hold these keys allow fast changing of the NOTE value or setting The SWITCH Key
15. ay pick up and or relay trip In addition a changeover IRF contact is available for monitoring any relay failure Through the optically isolated RS485 Modbus RTU serial communication interface MK2200 can be networked to SCADA system Chapter 2 Description of Operation MK2200 consists of three independent phase overcurrent elements and one directional earth fault element It is intended to be used for phase short circuit protection and earth fault protection of electrical distribution system All the overcurrent and earth fault elements in the relay are connected to the electrical distribution feeders to be protected through either 5A CTs or 1A CTs as shown in Chapter 5 Measurements of the phase currents and earth fault current are done through waveform sampling and numerical technique to extract only the fundamental frequency components thus eliminate the possible erroneous response to protection function as a result of harmonic currents in the electrical distribution system 2 1 Phase Overcurrent Protection 50 51 The phase overcurrent protection consists of low set stage and high set stage for all the three phases namely 4 112 and The low set element setting and the high set element setting are common to all the three phases MK2200 provides dual setting groups Group A or Group B interchangeable through an external digital input configurable through Soft Switch A 2 1 1 Low set Overcurrent Element During a fault co
16. be programmed to be a manually reset contact or an auto reset contact through Soft Switch 7 Contact R2 is the default breaker failure protection NOTE output Internal Relay Failure IRF output The IRF contact is a changeover contact When the auxiliary power supply to the MK2200 is absent or the MK2200 relay malfunctions the IRF relay will not operate indicating a fault condition However if the power supply to the MK2200 is switched on and it function normally the IRF contact operates causing the normally open NO contact to close and the normally close NC contact to open Serial Communication MK2200 is equipped with an optically isolated serial RS485 communication port running serial Modbus RTU protocol This allows the relay to be connected to a SCADA system for central monitoring purpose 10 2 9 Time Current Characteristic Curves The low set overcurrent element 51 and the low set earth fault element 51N can be independently programmed to have variable time delay proportional to the fault current in a manner prescribed by IEC standard IEC60255 3 These are called inverse definite minimum time IDMT curves There are four available curve selections for MK2200 e Normal inverse curve e Very inverse curve e Extremely inverse curve e Long time inverse curve The equations for the above IDMT curves can be expressed as KB Vio I Where t operating time in seconds K time multiplier measured
17. current 1 set current a constant constant Characteristic curve a p Normal Inverse 0 02 0 14 Very Inverse 1 00 13 50 Extremely Inverse 2 00 80 00 Long time Inverse 1 00 120 00 11 NORMAL INVERSE t s VERY INVERSE t s NN NYY EXTREMELY INVERSE 100 NN 14 gt LONG TIME INVERSE 15 Chapter 3 Display and User Programming MK2200 has a very user friendly front panel interface Item selected will have its indicator or indicators lighted up and the corresponding parameter for the selected item will be shown on a four digit display 3 1 Four digit Display eJ Number Value The 4 digit display shows the parameter of the selected item It can be divided into two sections The left most digit forms the first section which represents the number or group selection The three right most digit forms the second section which represents the value or setting 3 2 Indicators gt AUX When lighted it indicates the presence of auxiliary power supply to MK2200 START When any of the overcurrent or earth fault protection element pick up started this indicator lights up It turns off when all elements which s
18. d Caution See operating instruction Protective earth ground Earth Ground Warning statements describe conditions or action that can result in personal injury or loss of life t tat tsd M CAUTION Cau ion statements describe conditions or actions that can result in property damage NOTE Notes contain additional information on usage CONTENTS 1 Introduction u u u ces 4 2 Description of Operation 5 e Phase Overcurrent Protection 50 51 Earth Fault Protedion 50N 51N e Circuit Breaker Failure Protection 50BF e Current Measurement e Digital Input Programmable Output Contacts Internal Relay failure IRF Output e Serial Communication e Characteristic Curves 3 Display and User Programming 16 e Four digit Display Indicators e Display under Normal Non operating Condition Display under Start Condition Display under Trip Condition e The RESET STEP Key e The PROGRAM Key e The UP and DOWN Key e The SWITCH Key e Programming the Protection Functions Programming the Soft Switches 4 SoftSWItChes sss ar 2 5 CONNSCHONS 44 e Connection Terminals e Connection Diagrams 6 Case DIMENSIONS 48 7 Technical Data uuu uuu L 49 8 Tests and Standards
19. e of 2A Please refer to Appendix B for conversion between decimal number and hexadecimal number Unit number setting Ooo T Ef Default setting 1 User s setting MM i Soft Switch D The settings of MK2200 can either be changed through the front panel or through the serial Modbus RTU communication However programming of settings by remote serial Modbus RTU communication can be disabled by using this Soft Switch to prevent unauthorised or inadvertent change of relay s settings Setting pO Default setting User s setting e 1 Remote programming enabled 0 Remote programming disabled 41 Soft switch E This Soft Switch provides a mean for the user to manually turn on or turn off the relay s output contacts This is very useful during testing and commissioning of the relay During the test one of the relay s output contacts can be switched on sequentially Upon exiting the test all output contacts will be switched off regardless of their state prior to the test Description Display value OFF all output contacts 00 ON output contact R1 only 01 ON output contact R2 only 02 ON output contact R3 only 03 ON output contact R4 only 04 ON output contact R5 only 05 Steps to switch the output contacts 1 Select Soft Switch E by repeatedly pressing the SWITCH key Press PROGRAM key and the Switch Number E flashing 3 Press the UP or DOWN key to change the displayed value and
20. e time current characteristic curve of low set earth fault element Time current characteristic for earth fault Setting Normal inverse Very inverse Extremely inverse Long time inverse Definite time Digit 2 is for configuring the time current characteristic curve of low set overcurrent element Time current characteristic for overcurrent Normal inverse Very inverse Extremely inverse Long time inverse Definite time 37 Soft Switch A The digital input of MK2200 can be used for several functions and its intended function is determined by the setting of Soft Switch A The available functions for the digital input are as shown below and only one function can be selected at any one time Input for switching the protection settings between Group and Group e Input for blocking the selected overcurrent and earth fault protection elements e Input for remotely resetting a trip relay or resetting manual start contacts Input for tripping the 2200 by another external device Besides being used for configuration of the digital input switch SA 7 enable the automatic doubling of high set overcurrent setting during a cold load pickup Cold load pickup is started when the phase current increases from below 0 12 times of the low set overcurrent setting to 3 times the low set overcurrent setting in less than 60ms This condition ends when the phase current fall below 2 times the low set overcurrent setting Soft
21. elay panel light up to indicates that the relay picks up After a delay time longer than the set t the MK2200 then generates a trip signal to activate the output contacts R2 to R5 which are user programmable to response to the trip signal from high set overcurrent element through Soft Switch 2 to 5 respectively The TRIP indicator blinks to indicate that the relay has tripped The time delay between the start signal and trip signal can either be instantaneous without any intentional delay or a fixed time delay settable through t gt gt NOTE This high set element can be disabled through Soft Switch 1 When the electrical power system is restored after a power outage or when a large motor load is started the phase currents can momentarily increase by several times a condition known as cold load pick up This may cause unwanted tripping by the relay s high set elements However if gt gt is set too high to overcome cold load pick up tripping protection may be compromised MK2200 allows user to automatically double the gt gt setting when it detects a cold load pick up condition A cold load pick up condition starts when the phase current increases from below 0 12 times of the overcurrent low set gt setting to 3 times gt within a time less than 60ms This condition ends when the phase current fall below 2 times 3xl 2xl fll as 0 12 1 gt t gt Start lt 60 ms Figure
22. ent and earth fault for Group A and Group B protection settings In addition it also allows the enabling and delay selection of CBFP 50BF protection function Refer to Chapter 2 for details on CBFP Soft Switch 1 S1 7 S1 6 S15 514 51 3 51 2 11 181 0 Default setting Binary Default setting Hexadecimal 3 Digit 2 Binar Hexadecimal 27 51 0 This switch is for selection of overcurrent high set for Group A 1 overcurrent high set enabled 0 overcurrent high set disabled 51 1 This switch is for selection of overcurrent high set for Group 1 overcurrent high set enabled 0 overcurrent high set disabled 51 4 This switch is for selection of earth fault high set for Group 1 earth fault high set enabled 0 earth fault high set disabled 51 5 This switch is for selection of earth fault high set for Group 1 earth fault high set enabled 0 earth fault high set disabled 1 6 S1 7 and S1 2 s1 3 are switches for selection of breaker failure protection 50BF function for Group A and Group B respectively The selection is as shown in the table below 50BF for Group A selection 1 7 51 Disabled 120 mS delay 62 150 mS delay 62 200 mS delay 62 50BF for Group B selection Disabled 120 mS delay 62 150 mS delay 62 200 mS delay 62 Once
23. er s setting Binary User s setting Hexadecimal 30 Soft Switch 4 Remarks lo gt gt lo gt gt gt gt gt gt trip start trip start Default setting Binary Default setting A Hexadecimal User s setting Binary User s setting Hexadecimal Soft Switch 5 Remarks Default setting Binary Default setting Hexadecimal User s setting Binary User s setting Hexadecimal Output contact R1 is the default trip contact and cannot be CAUTION re programmed 31 Soft Switch 6 Soft Switch 6 configures the output contacts R1 R2 R3 R4 amp R5 to be latching type or non latching type of contact when responding to a start signal Soft Switch 6 S6 7 S6 6 S6 5 a S6 3 56 2 56 1 56 0 Not Not Not DONIS used used used Default setting 0 0 0 Binary Default setting Hexadecimal User s setting Binary User s setting Hexadecimal S6 0 This switch determines the contact type for R1 when responding to start signal S6 1 1 Manual reset for R1 when responding to a start signal 0 Auto reset for R1 when responding to a start signal This switch determines the contact type for R2 when responding to start signal S6 2 1 Manual reset for R2 when responding to a start signal 0 Auto reset for R2 when responding to a start signal This switch determines the contact type for R3 when responding
24. high set overcurrent start signal Sx 3 This switch relates the relay output Rx to high set overcurrent trip signal 1 Rx responding to high set overcurrent trip signal 0 Rx not responding to high set overcurrent trip signal 29 Sx 4 This switch relates the relay output Rx to ow set earth fault start signal 1 Rx responding to low set earth fault start signal 0 Rx not responding to low set earth fault start signal Sx 5 This switch relates the relay output Rx to ow set earth fault trip signal 1 Rx responding to low set earth fault trip signal 0 Rx not responding to low set earth fault trip signal Sx 6 This switch relates the relay output Rx to high set earth fault start signal 1 Rx responding to high set earth fault start signal 0 Rx not responding to high set earth fault start signal Sx 7 This switch relates the relay output Rx to high set earth fault trip signal 1 Rx responding to high set earth fault trip signal 0 Rx not responding to high set earth fault trip signal Soft Switch 2 525 524 523 522 21 520 R k lo gt gt lo gt gt lo gt gt gt gt gt gt PASS trip start start trip start trip Default setting Binary 0 0 0 0 0 User s setting Hexadecimal Default setting Hexadecimal User s setting Binary Soft Switch 3 S3 7 3 6 lo gt gt lo gt gt Memare trip start Default setting 0 0 Binary Default setting Hexadecimal Us
25. ndition if the phase current exceeds the threshold of low set overcurrent setting gt the MK2200 generates a start signal to activate the output contacts R2 to R5 which are user programmable to response to the start signal from low set overcurrent element through Soft Switches 2 to 5 respectively Simultaneously the START indicator on the relay panel light up to indicates that the relay picks up After a delay time longer than the set t the MK2200 then generates a trip signal to activate the output contacts R2 to R5 which are user programmable to response to the trip signal from low set overcurrent element through Soft Switch 2 to 5 respectively The TRIP indicator blinks to indicate that the relay has tripped Depending on the Soft Switch 8 and Soft Switch 9 settings the time delay between the start signal and trip signal can either be a fixed time delay or a variable time delay inversely proportional to the fault current This variable time current delay characteristic is in accordance with IEC 60255 3 standard for inverse definite minimum time IDMT curve 2 1 2 High set Overcurrent Element If the phase current exceeds the threshold of high set overcurrent setting gt gt MK2200 generates a start signal to activate the output contacts R2 to R5 which are user programmable to response to the start signal from high set overcurrent element through Soft Switches 2 to 5 respectively Simultaneously the START indicator on the r
26. odel MK2200 240AD Power consumption 85 265VAC 110 340VDC 5 9W typical External digital input All contact 18 265VDC 85 265VAC Rated voltage Continuously carry 250VAC 5A ACor DC Make and carry for 0 2sec Expected electrical life min operation 30A AC or DC 100 000 at max load Expected mechanical life min operation 5 000 000 Operating time Max 15ms 49 Overcurrent element i Low set Low set setting gt 0 10 2 50 x In step 0 01 Time multiplier 0 02 1 0 step 0 01 Definite time setting 0 10 0s step 0 01 10 0 10058 step 0 1 100 300s step 1 Reset ratio 95 typical IDMT curve and accuracy Normal inverse E5 class IEC255 3 Extremely inverse E7 5 High set High set setting gt gt 0 1 to 10 In step 0 05 10 to 40 In step 0 1 Definite time setting 0 10 0s step 0 01 10 0 10058 step 0 1 100 300 step 1 Earth fault element Low set Low set setting lo gt 0 05 1 0 x In step 0 01 Time multiplier 0 02 1 0 step 0 01 Definite time setting 0 10 0s step 0 01 10 0 10058 step 0 1 100 300s step 1 Reset ratio 95 typical IDMT curve and accuracy Normal inverse E5 class IEC255 3 L Very inverse Eb Extremely inverse E7 5 Long time inverse E5 ii High set High set setting gt gt 0 05 10 0x n step 0 05 Definite time setting 0 10 0s step 0 01 10 0 100s step 0 1 100
27. rresponding phases 1 1 12 or lio There are nine sets of trip records To view all the records press the UP or DOWN key The left section of the four digit display shows the record number and the right section of the four digit display shows the trip current Record 1 is the latest record Record Trip Current Number The fault current recorded is the NOTE current at the moment of relay tripping and not when the relay starts The fault records are stored in non volatile memory thus will not be erased even after the auxiliary power supply to the relay is switched off 17 gt Start time When this item is selected the four digit display shows the latest relay start time This start time is the time period from relay pick up until relay reset The minimum record time is 0 1 second User can use this start timer to determine the duration of starting current for a heavy load such as a motor load or to check the total tripping time inclusive of breaker operating time This timer will be overridden by a new start event or will be erased when the auxiliary power supply to the relay is switched off gt l When this item is selected the four digit display shows the low set overcurrent setting of the relay The left section of the four digit display indicates whether the setting is for Group A or for Group B and the right section indicates the corresponding low set overcurrent setting for either Group A or
28. s external input for tripping the relay by activating output contact R1 When a DC or AC voltage within the specified range appears between the two terminals of the digital input the digital input is activated WARNING This input can accept either or AC voltage up to 265VAC Programmable Output Contacts MK2200 has five output contacts namely R1 R2 R3 R4 amp R5 Of all these output contacts four are fully user programmable R1 is factory preset to be the dedicated tripping contact and cannot be reprogrammed by the user Relay tripping by any of the protection stages or by digital input if selected will activate the R1 output contact Output contacts R2 R3 R4 and R5 can be programmed to respond to any or all of the following events 2 7 2 8 e Low set overcurrent pick up start e Low set earth fault pick up start e High set overcurrent pick up start e High set earth fault pick up start e Low set overcurrent trip Low set earth fault trip e High set overcurrent trip High set earth fault trip By programming Soft Switch 6 R2 R3 R4 and R5 can be configured for manual reset or auto reset after the contacts pick up Similarly Soft Switch 7 is used to configure R1 R2 R3 R4 and R5 for manual reset or auto reset after these contacts are activated by tripping signal Contact R1 response to tripping signal only and NOTE cannot be re programmed It is the default trip contact However it can
29. tarted the pick up are reset TRIP When the relay trip due to tripping of any of the protection element this indicator blinks to indicate a tripped condition lu When this indicator is lighted the 4 digit display shows the measured current for phase L1 If this indicator and the Record indicator light up simultaneously the value shown on the 4 digit display is the recorded current for L1 at the moment of tripping 16 Ip When this indicator is lighted the 4 digit display shows the measured current for phase 12 If this indicator and the Record indicator light up simultaneously the value shown on the 4 digit display is the recorded current for L2 at the moment of tripping li When this indicator is lighted the 4 digit display shows the measured current for phase L3 If this indicator and the Record indicator light up simultaneously the value shown on the 4 digit display is the recorded current for L3 at the moment of tripping lo When this indicator is lighted the 4 digit display shows the measured earth fault current LO If this indicator and the Record indicator light up simultaneously the value shown on the 4 digit display is the recorded earth fault current at the moment of tripping Record This indicator lights up simultaneously with either indicators 1 1 li2 or indicator When selected the digit display shows the latest tripping fault current of the co
30. the corresponding output contact will be switched on 4 exit the test press the SWITCH or PROGRAM key All output contacts will be switched off after the test NOTE irrespective of their previous state 42 Soft Switch F This Soft Switch is for selecting the operation frequency of the electrical system to be protected Setting Default setting 0 50Hz User s setting 1 60 Hz system frequency 0 50 Hz system frequency System frequency must be set correctly before commissioning CAUTION Failure to do so will result in erroneous phase and earth fault current measurements 43 Chapter 5 Connection 5 1 Connection Terminals 7 S GE JEE N O 2 Figure 5 1 Rear view of MK2200 44 Connection terminal Function Description 1 5A 1A common CT input for I 4 2 5A CT input for I 1 3 1A CT input for l 1 4 5A 1 A common CT input for 2 5 CT input for 112 6 1A CT input for 1 2 7 5A 1A common CT input for l 3 8 CT input for 1 3 9 1A CT input for 1 3 10 5A 1A common CT input for 10 11 5A CT input for 10 12 1A
31. the Breaker Failure Protection is selected Relay CAUTION R2 will be the dedicated breaker failure output tripping contact for backup breaker All settings in relation to R2 on Soft Switch 2 will be ignored 28 Soft Switch 2 to 5 Soft Switches 2 to 5 are used to configure the functional characteristic of contact output R2 R3 R4 and R5 respectively Through these four Soft Switches the corresponding contact outputs can be configured to response to one or more events such as relay start pickup and relay trip generated by any of the overcurrent or earth fault protection elements Table below shows the general setting option for contact output Rx and Soft Switch x Sx 1 Sx 0 gt gt gt gt Remarks start trip start Default setting Binary Default setting Hexadecimal Digit 1 User s setting Binary User s setting Hexadecimal Sx 0 This switch relates the relay output Rx to ow set overcurrent start signal 1 Rx responding to low set overcurrent start signal 0 Rx not responding to low set overcurrent start signal Sx 1 This switch relates the relay output Rx to ow set overcurrent trip signal 1 Rx responding to low set overcurrent trip signal 0 Rx not responding to low set overcurrent trip signal Sx 2 This switch relates the relay output Rx to high set overcurrent start signal 1 Rx responding to high set overcurrent start signal 0 Rx not responding to
32. ting will be ignored if CBFP is s elected If CBFP is selected for both Group A and Group B Soft Switch 2 will not be accessible Prgtective Breaker elay Interrupt Time Time Time Breaker Failure Timer 62 Tripping Initiated by Tripping Initiated by Relay output contact R1 Relay output contact R2 Figure 2 2 Timing diagram for CBFD Current Measurements The three phase currents and the earth fault current are measured through either 5A or 1A CTs The microprocessor in MK2200 samples the current waveforms at regular interval of 12 samples per cycle Through digital filtering only the fundamental frequency components 50Hz or 60Hz are used for the protection functions MK2200 s metering feature allows all the phase currents and the earth fault current to be viewed through the front panel display or through the Modbus RTU serial communication 2 5 2 6 Make sure that the system frequency selection on Soft CAUTION Switch F is set correctly Failing to do so will result in erroneous reading of the phase and earth fault currents Digital Input MK2200 has optically isolated multifunction digital input which can be configured to perform one of the following functions through Soft Switch A As blocking input for blocking the operation of one or more of the protection stages e As group switching input to switch between Group A or Group e remote reset input after relay tripped e A
33. to start signal S6 3 1 Manual reset for R3 when responding to a start signal 0 Auto reset for R3 when responding to a start signal This switch determines the contact type for R4 when responding to start signal 1 Manual reset for RA when responding to a start signal 0 Auto reset for R4 when responding to a start signal 32 56 4 This switch determines the contact type for R5 when responding to start signal 1 Manual reset for R5 when responding to a start signal 0 Auto reset for R5 when responding to a start signal S6 5 to S6 7 Not used 33 Soft Switch 7 Soft Switch 7 configures the output contacts R1 R2 R3 R4 amp 5 to be latching type or non latching type of contact when responding to a trip signal Soft Switch 7 S7 3 Remarks Default setting Binary Default setting Hexadecimal User s setting Binary User s setting Hexadecimal 57 0 This switch determines the contact type for R1 when responding to trip signal 1 Manual reset for R1 when responding to a trip signal 0 Auto reset for R1 when responding to a trip signal S7 1 This switch determines the contact type for R2 when responding to trip signal 1 Manual reset for R2 when responding to a trip signal 0 Auto reset for R2 when responding to a trip signal S7 2 This switch determines the contact type for R3 when responding to trip signal 1 Manual reset for R3 when responding to a trip signal 0 A
34. using only the output contact R1 of MK2200 to be activated This input is for any external device to trip the relay 1 Enable external tripping function 0 Disable external tripping function SA 7 When selected the high set overcurrent setting automatically doubled during cold load pickup Refer to Chapter 2 on details of cold load pickup 1 Enable the cold load pickup function 0 Disable the cold load pickup function 99 Soft Switch B This Soft Switch set the serial communication format for MK2200 It configures the data format and baud rate for the Modbus communication between host computer client and MK2200 server Digit 2 Digit 1 Default setting 4 7 User s setting Digit 1 is for selection of communication baud rate 9600 19200 Digit 2 is for selection of data format Data format Digit 2 setting 1 start bit 8 data bits no parity 1 stop bit 1 start bit 8 data bits no parity 2 stop bit 1 start bit 8 data bits odd parity 1 stop bit 1 start bit 8 data bits even parity 1 stop bit 40 Soft Switch C Every Modbus device on a network is identified by a unique device s unit number This Soft Switch is for configuring the unit number for MK2200 The setting range for MK2200 s unit number is from 1 to 127 and it is displayed in hexadecimal format Example if the intended unit number is 42 then the display shows the equivalent hexadecimal valu
35. uto reset for R3 when responding to a trip signal S7 3 This switch determines the contact type for R4 when responding to trip signal 1 Manual reset for R4 when responding to a trip signal 0 Auto reset for R4 when responding to a trip signal 34 S7 4 This switch determines the contact type for R5 when responding to trip signal 1 Manual reset for R5 when responding to a trip signal 0 Auto reset for R5 when responding to a trip signal S7 5 to S7 7 Not used 35 Soft Switch 8 This switch is Group A s selection of IDMT curves for low set overcurrent and low set earth fault Digit 1 Remarks K t gt Group A K to gt Group A Default setting 1 1 User s setting Digit 1 is for configuring the time current characteristic curve of low set earth fault element Time current characteristic for earth fault Normal inverse Very inverse Extremely inverse Long time inverse Definite time Digit 2 is for configuring the time current characteristic curve of low set overcurrent element Time current characteristic for overcurrent Setting Normal inverse Very inverse Extremely inverse Long time inverse Definite time 36 Soft Switch 9 This switch is Group B s selection of IDMT curves for low set overcurrent and low set earth fault Digit 2 Digit 1 Remarks K t gt Group B K to gt Group B Default setting User s setting Digit 1 is for configuring th
36. wed at 0 9 times the current IEC 61000 4 11 IEC 60947 2 setting Unom 100 5 ms 10 ms 20 ms 50ms 100ms Power supply interruptions and ripple and 200 ms EN 61000 4 11 IEC 60255 11 12 96 ripple AC component full wave rectified 100 Hz on DC power supply Power frequency magnetic field IEC 61000 4 8 30 A m 100 A m 300 A m 52 50 Hz plus 150 Hz 75 Harmonic current 50 Hz plus 250 Hz 50 Harmonic current Harmonic currents Step 1 Total RMS value 0 9 times the IEC 60947 2 current setting Step 2 Total RMS value 2 times the current setting 15 150 kHz 30 V 50 Hz continuous and 300 short duration mains power input LF signals IEC 61000 4 16 EMC Tests Emission Mains conducted disturbance voltage Passed EN 55011 Group 1 Class B Radiated EM Field emission Passed CISPR 11 Group 1 Class B 53 Chapter 9 Appendix A Binary to hexadecimal conversion table 54 Chapter 10 Appendix B Decimal to Hexadecimal Conversation Decimal Hexadecimal Decimal Hexadecimal Decimal Hexadecimal 1 1 44 20 87 S 2 2 45 2D 88 58 3 3 46 2E 89 59 4 4 47 90 5 5 48 30 91 5B 6 6 49 31 92 5C 7 K 50 32 93 5D 8 8 51 98 94 9 9 52 34 95 10 53 35 96 60 11 54 36 97 61 12 C 55 37 98 62 13 D 56 38 99 63 14 E 57 39
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