Ice NPM800, User Manual

Page 1: ...NPM800 NPM800R Motor multi function relay User s Guide ...

Page 2: ...efully in order to take note of the available functionalities and to proceed to connection and power of the product in accordance with the provided recommendations Locally setting commissioning and real time or event readings are accessible from keyboard and displayed on the protection display To be fully exploited the available functions must be parameterized and consulted with the setting softwa...

Page 3: ..._________________________________________________ 13 5 1 ACCESS TO MAIN MENUS 13 5 2 MEASUREMENT MENU V1 24 AND V2 XX FIRMWARE ONLY 15 5 3 MAINTENANCE MENU SINCE V3 00 FIRMWARE 17 5 4 PHASE EARTH FAULT MENU AFTER STARTING 19 5 5 GENERIC FUNCTIONS MENU 21 5 6 THERMAL OVERLOAD MENU 22 5 7 START MENU 24 5 8 LOSS OF LOAD MENU OR PUMP UNPRIMING 26 5 9 UNBALANCE MENU 27 5 10 LOAD SHEDDING MENU 28 5 11 R...

Page 4: ...E TERMINAL BLOCKS WITHOUT SHORT CIRCUITING DEVICES 49 8 3 NPM800 CONNECTIONS 50 8 4 NPM800 DIAGRAM 50 8 5 NPM800 CONNECTION OF THE CURRENT INPUTS 50 9 CONNECTION OF NPM800R NPM800RE RELAYS _________________________________ 51 9 1 REAR VIEW OF NPM800R WITH LOCATION OF THE TERMINAL BLOCKS 51 9 2 NPM800R FIXING RODS 52 9 3 REAR VIEW OF NPM800RE WITH LOCATION OF THE TERMINAL BLOCKS 53 9 4 NPM800RE FIX...

Page 5: ...y of the people during the operation of the relays During installation commissioning or maintenance they can however present high voltages and possibly a thermal heating Consequently the following precautions must be respected Connection of the terminal blocks at installation must be carried out after having ensured of the absence of any voltage Their access during operation must be carried out th...

Page 6: ...o 5 Indice g The relays should in no case be opened by the User During their removal they must be completely isolated from any external polarity and condensers must be discharged by connecting their external terminals to the earth Destruction of the relays will have to be carried out in accordance with legislation in force in particular in compliance with the environment and safety requirements ...

Page 7: ...uration available only by the setting software ANSI 86 latching output contacts Configuration available only by the setting software ANSI 74TC trip circuit supervision Configuration only by the setting software 2 2 Operation functions NPM800 and NPM800R NPM800RE Two setting groups Assignment of digital inputs Assignment of relay outputs User programmable LEDs Monitoring of trips and reclosings Hel...

Page 8: ...nctionalities can be accessed through the RS232 or RS485 links Saving of configuration Commissioning tests LCD display adjustment of contrast LEDs Commissioning tests relays wiring Reading of real time values measurement and counters Reading of disturbance recordings ANSI 50BF 50_NBF circuit breaker failure function ANSI 86 latching output contacts ANSI 74TC trip circuit supervision These function...

Page 9: ...ault or an alarm If a fault or alarm occurs a message indicates the type of fault TRIP PHASE FAULT This message disappears at once after acknowledgement of the fault and is replaced by the following message TRIP PH FAULT S 10 12 16 38 15 R This message remains until the acknowledgement of the fault by the User Note if the mode simplified recording of events is not chosen the display will be as fol...

Page 10: ... first modification 4 1 Setting mode In Out Press any key except CLEAR to enter in setting mode If no parameter has been modified exit the mode by pressing the CLEAR key MAIN MENU MESUREMENTS CURRENT I1 0 0 A CURRENT I1 0 0 A Or MAIN MENU MAINTENANCE Measurements Menu for the V1 24 and V2 xx Firmware and Maintenance Menu from the V3 00 Firmware If a parameter has been modified confirm the exit fro...

Page 11: ... MAIN MENU MAINTENANCE Use the and keys to access the various parameters in the menu SHORT CIRCUIT Active SHORT CIRC DELAY 0 50 s SHORT CIRC THRES 3 0 In Use the and keys to modify the parameter You must confirm your change using the ENTER key after each parameter modification After storing the new parameter value next parameter is displayed SHORT CIRC DELAY 0 60 s SHORT CIRC DELAY 0 70 s SHORT CI...

Page 12: ...hanumeric characters The following example shows how to replace code AA with 99 MAIN MENU CHANGE CODE Press on ENTER to confirm OLD PASSWORD _ Press on until obtaining the letter A OLD PASSWORD I Press on to displace the cursor _ OLD PASSWORD I_ Press on until obtaining the letter A OLD PASSWORD AA Press on ENTER to confirm NEW PASSWORD _ Press on until obtaining the letter 9 NEW PASSWORD 9 Press ...

Page 13: ...units Relays assigned to a function are displayed with Key allows displacing the cursor _ on the relay s to assign Key allows assigning or not the relays used by the functions Example assignment of relay B to TRIP Io low earth function At the beginning no function was assigned to this relay Caution do not forget to confirm by ENTER key EARTH TRIP RELAY A_ B C D EARTH TRIP RELAY A B_ C D EARTH TRIP...

Page 14: ...ameter setting mode MAIN MENU MEASUREMENTS Real time measures firmware V1 24 and V2 xx Cf chapter 4 to select a menu Or MAIN MENU MAINTENANCE Real time measures since V3 00 firmware MAIN MENU PHASE EARTH FLT Parameters of the functions 50 and 51N MAIN MENU GENERIC FUNCTION Parameters of the customized functions MAIN MENU THERMAL IMAGE Parameters of the thermal overload function MAIN MENU STARTING ...

Page 15: ...bout disturbance recording MAIN MENU COUNTERS Information about counters MAIN MENU OPERATION Operating parameters to be defined at commissioning MAIN MENU RS485 COMMS Configuration of the Modbus RS485 communication option if option available MAIN MENU CHANGE CODE Change of the access code MAIN MENU INFORMATION Information about protection MAIN MENU EVENTS Reading of the event log Leaving any sub m...

Page 16: ...CURRENT I3 0 0 A Measure of the phase 3 primary current 0 0 to 65535A CURRENT Io 0 00 A Measure of the earth Io primary current 0 0 to 65535A FREQUENCY 50 00 Hz Measure of the network frequency 45 to 55 if Fn 50 Hz 55 to 65 if Fn 60 Hz THERMAL IMAGE 0 0 Measure of the thermal state of motor 0 0 to 500 NEGATIVE SEQ 0 0 Measure of the rate of negative sequence of current POSITIVE SEQ 0 0 Measure of ...

Page 17: ...014 Folio 16 Indice g AVER CURRENT I1 100 0 A Value of the average primary current of phase 1 0 to 65535A AVER CURRENT I3 100 0 A Value of the average primary current of phase 3 0 to 65535A AVER CURRENT I0 0 0 A Value of the average earth fault primary current 0 to 65535A SETTING set 1 Display of the active setting group set 1 or set 2 02 07 01 10 19 42 Day Month Year Hour minute second ...

Page 18: ...0 0 to 65535A CURRENT Io 0 00 A Measure of the earth Io primary current 0 0 to 65535A FREQUENCY 50 00 Hz Measure of the network frequency 45 to 55 if Fn 50 Hz 55 to 65 if Fn 60 Hz THERMAL STATE 0 0 Measure of the thermal state of motor 0 0 to 500 NEGATIVE SEQ 0 0 Measure of the rate of negative sequence of current POSITIVE SEQ 0 0 Measure of the rate of positive sequence of current LAST START CURR...

Page 19: ...e the commissioning 0 to 65535 h AVER CURRENT I1 100 0 A Value of the average primary current of phase 1 0 to 65535A AVER CURRENT I3 100 0 A Value of the average primary current of phase 3 0 to 65535A AVER CURRENT I0 0 0 A Value of the average earth fault primary current 0 to 65535A SETTING set 1 Display of the active setting group set 1 or set 2 E1E2E3E4E5E6E7E8 0 0 0 0 0 0 0 0 Display of the dig...

Page 20: ...2 SHORT CIRCUIT Active Choose Active to use the phase to phase short circuit function Active or Inactive SHORT CIRC DELAY 0 06 s Set the value of time delay of the phase to phase short circuit function 0 04 to 3 s SHORT CIRC THRES 3 0 In Set the threshold of the phase to phase short circuit function 3 0 to 12 0 In SHORT C INST REL A B C D Select relay to assign to the short circuit instantaneous f...

Page 21: ...3 s EARTH FLT THRESH 0 1 In Set the value of the threshold of earth fault function 0 03 to 0 4 In EARTH INST RELAY A B C D Select relay to assign to the earth fault instantaneous function See chap 4 to choose a relay or to modify the assignment EARTH INST RELAY E F G relays D E F G if option available EARTH TRIP RELAY A B C D Select relay to assign to the earth fault trip function See chap 4 to ch...

Page 22: ... MENU GENERIC FUNCTION Parameters of the customized functions FCT GENERIC 1 Inactive Choose Trip or Report to use function 1 Trip or Disable or Report TEMP GENERIC 1 0 06 s Set the time delay of function 1 0 04 to 300 00s RELAY GENERIC 1 A B C D Select relay to assign to function 1 See chap 4 to choose a relay or to modify the assignment RELAY GENERIC 1 E F G relays D E F G if option available DIG...

Page 23: ...t 1 or set 2 THERMAL OVERLOAD Active Choose Active to use thermal overload function Active or Inactive HEATING CONST 40 mn Set the value of the thermal overload time constant 4 to 64 minutes COOLING CONST 4 0 CST ECHAUF Set the cooling constant 1 0 to 6 0 heating constant START FACTOR 50 Set the coefficient calculation of the thermal overload starting mode 50 to 100 NEG SEQ FACTOR 3 Set the negati...

Page 24: ...hout prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 23 Indice g TH ALARM RELAY A B C D Select relay to assign to the thermal alarm function See chap 4 to choose a relay or to modify the assignment TH ALARM RELAY E F G relays D E F G if option available ...

Page 25: ...mber of starts too long start rotor stall after start period SETTING set 1 Choose the setting group set 1 or set 2 LONG ST ST ROTOR Active Choose Active for too long start and locked rotor 51 LR Active or Inactive START THRESHOLD 2 0 Iref Detection Threshold of the start of the motor Iref thermal current of reference 1 0 to 10 0 Iref START DELAY 20 s Maximum duration of start for too long start 2 ...

Page 26: ... of starts 15 to 60 min BLOCKING DELAY 15 min Duration of the inhibition of restarting 15 to 60 min HOT START Active Choose Active for the hot motor inhibition of start function Active or Inactive HOT START THRESH 40 Setting of the threshold of inhibition of hot motor starting 40 to 100 START RELAY A B C D Select relay to assign to inhibition of hot motor starting See chap 4 to choose a relay or t...

Page 27: ... minimum load function pump unpriming 37 SETTING set 1 Choose the setting group set 1 or set 2 LOSS OF LOAD Active Choose Active to use the loss of load function Active or Inactive MIN THRESHOLD Id 0 20 In Minimum direct current for loss of load threshold 0 10 to 2 40 In LOAD LOSS DELAY 2 s Set the time delay of the loss of load function 0 05 to 120 s LOAD LOSS RELAY A B C D Select relay to assign...

Page 28: ...ctive NEG SEQ THRESH 0 20 In Set the negative sequence threshold 0 20 to 0 80 In NEG SEQ DELAY 1 s Set the dependent time curve 1 to 10 s TRIP MIN N S DEL 0 06 s Set the minimum duration of trip 0 04 to 10 s UNBAL INST RELAY A B C D Select relays for the instantaneous unbalance and phase reversal functions See chap 4 to choose a relay or to modify the assignment UNBAL INST RELAY E F G relays D E F...

Page 29: ...g group set 1 or set 2 DELOAD Active Choose Active to use the load shedding function Active or Inactive DELOAD DELAY 0 10 s Set time delay of load shedding 0 06 to 120 s DELOAD RELAY A B C D Select relay to assign for the load shedding function See chap 4 to choose a relay or to modify the assignment DELOAD RELAY E F G relays D E F G if option available 5 10 2 Load shedding menu since V3 00 firmwa...

Page 30: ...ut prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 29 Indice g LOAD SHED RELAY A B C D Select relay to assign for the load shedding function See chap 4 to choose a relay or to modify the assignment LOAD SHED RELAY E F G relays D E F G if option available ...

Page 31: ...ve to use remote control option Active or Inactive Active if communication available LOAD SHED LEVEL 6 Set the level of load shedding 1 to 6 Level 6 inhibits the load shedding function RE LOAD DELAY 20 00 s Set the time delay before reclosing 1 00 s to 120 00 s TRIP RELAY A B C D Select relay to assign to remote control trip See chap 4 to choose a relay or to modify the assignment TRIP RELAY E F G...

Page 32: ...re MAIN MENU TELECONTROL Information about remote control option TELECONTROL Active Choose Active to use remote control option Available if the communication option is present Active or Inactive LOAD SHED LEVEL 2 Set the level of load shedding Level 6 inhibits the load shedding function Available if the communication option is present 1 to 6 RE LOAD DELAY 20 00 s Set the time delay before reclosin...

Page 33: ... if the management of input s number Local distant is carried out with 2 digital inputs No input Input 1 to 8 or 1 to 4 according option DISTANT INPUT Input 4 Display of input assigned to the DISTANT operation mode Available if the communication option is present No input Input 1 to 8 or 1 to 4 according option 5 12 Disturbance menu This menu is used to configure the parameters of the disturbance ...

Page 34: ...0000 0 kA2 Display of cut A of phase 3 RAZ A2 CUTOFF Confirm ENTER Reset of cut A with ENTER key NBER OPERATIONS 100 Display of the number of operations of the circuit breaker RESET NB OPERAT Confirm ENTER Reset of the number of operations of the circuit breaker REL HOLD RESET Confirm ENTER ANSI 86 reset of the latching function for the output relay MAX METER I1 100 A Display of the current maxime...

Page 35: ...Operating parameters to be defined at commissioning LANGUAGE English Choice of the language used locally by protection French English Italian or Spanish ADJUST LCD 200 Adjustment of the angle of vision of the LCD display 70 to 255 I NOMINAL PRIM 1000 A Set the value of the phase primary rated current of the CTs 1 to 10000 A Io NOMINAL PRIM 100 A Set the value of the earth primary rated current of ...

Page 36: ...in 30 mn Adjustment of the time for calculation of average values and maximeters 5 to 60 min NB OF INPUTS L D 1 input Number of input s configurable for the management of the Local Distant mode 1 or 2 5 14 2 Operation menu since V3 00 firmware MAIN MENU OPERATION Operating parameters to be defined at commissioning LANGUAGE English Choice of the language used locally by protection French English It...

Page 37: ...to 10000 RELAY C B FAULT A B C D Select relay to assign to the circuit breaker failure function See chap 4 to choose a relay or to modify the assignment RELAY C B FAULT E F G D E F G relay if option available REL L R NO COMPL A B C D Select relay to assign to no complementarity local distant function remote control in service REL L R NO COMPL E F G D E F G relay if option available NB OF INPUTS L ...

Page 38: ...trip circuit D and G if option available RELAY A RECLOSE DJ Display the label of the output unit A configurable with the PC software RELAY B TRIP DJ Display the label of the output unit B configurable with the PC software RELAY C ALARM 9 Display the label of the output unit C configurable with the PC software RELAY D OUTPUT D Display the label of the output unit D if option available configurable ...

Page 39: ...5 communication option Since V3 00 Firmware SLAVE NUMBER 2 Slave number of protection 1 to 255 FORMAT 8b 0p ASCII2s number of bits parity bits of stop ASCII Binary format Parity 1p pair 1i odd 0p without p0 forced to 0 p1 forced to 1 SPEED 9600 bauds Speed transmission on RS485 link 300 600 1200 1800 2400 4800 9600 19200 38400 57 600 115 200 bauds RECEPT TIMEOUT 0 10 s Set the time delay of recept...

Page 40: ...f protection Rated frequency 50 or 60 Hz PROC VER x xx Version of the software of protection PHASES RAT 1 A EARTH RAT 1 A Display of the phases and earth ratings 1 A 5 A or CBCT NP 800 ICE 32 characters zone programmable with the setting software 5 17 2 Menu informations à partir de la Version V3 00 MAIN MENU INFORMATIONS Information about protection NPM800 50 Hz Type of protection Rated frequency...

Page 41: ...recorded as soon as a trip or alarm threshold of the current functions is reached INST PH FAULT TRIP PH FAULT INST Io FAULT TRIP Io FAULT INST UNBALA PH TRIP UNBALA PH TRIP START LON TRIP STALL ROT TRIP LOSS LOAD TRIP DELOAD Detail of available information can be consulted for each event in accordance with the list below MAIN MENU EVENTS List of the last 250 events TRIP PH FAULT S 17 06 14 22 00 R...

Page 42: ...00 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 41 Indice g CURRENT Io 0 1 A Earth fault current measured during the event NEGATIVE SEQ 175 6 Rate of negative sequence current measured during the event THERMAL STATE 0 Motor thermal state measured during the event Using keys and allows to display further information about the fault ...

Page 43: ...ent in accordance with the list below 6 2 1 Alarm ALRM THERM REP S 17 06 13 25 55 R Type of fault Start or End of fault Day Month Hour Minute Second Dated event Relative Synchronous 17 06 03 13 25 55 240 Day Month Year Hour Minute Second Millisecond SETTING set 1 Active setting group when tripping set 1 or set 2 CURRENT I1 2484 A Phase 1 current measured during the event CURRENT I3 0 A Phase 3 cur...

Page 44: ...hase 1 current measured at appearance of trip CURRENT I3 0 A Phase 3 current measured at appearance of trip CURRENT Io 0 0 A Earth fault current measured at appearance of trip NEGATIVE SEQ 100 Rate of negative sequence current THERMAL STATE 0 Motor thermal state measured at appearance of trip 6 3 Customized inputs events Events are recorded as soon as one of the customized input status changes INS...

Page 45: ...tail of available information can be consulted for each event in accordance with the list below ALRM NB OPERAS S 25 6 9 35 45 R Type of fault Start or End of fault Day Month Hour Minute Second Dated event Relative Synchronous 25 6 95 9 35 45 011 Day Month Year Hour Minute Second Millisecond SETTING set 1 Active setting group set 1 or set 2 6 5 Acknowledgement of events The acknowledgement of the l...

Page 46: ...US PHASE FAULT INSTANTANEOUS EARTH FAULT ALARM THERMAL REPLICA INSTANTANEOUS UNBALANCE 7 3 Messages related to trip type functions TRIP PHASE FAULT TRIP EARTH FAULT TRIP THERMAL REPLICA TRIP START TOO LONG TRIP STALLED ROTOR TRIP UNBALANCE PHASE TRIP LOSS OF LOAD TRIP DELOAD TRIP BY TELECONTROL TRIP GENERIC 7 4 Messages related to alarm type functions ALARM NUMBER OPERATIONS ALARM A2 CUTOFF CIRCUI...

Page 47: ...ly displayed in real time on LCD display throughout fault 7 7 Messages related to instantaneous type functions INSTANTANEOUS PHASE FAULT INSTANTANEOUS EARTH FAULT ALARM THERMAL REPLICA INSTANTANEOUS UNBALANCE 7 8 Messages related to trip type functions TRIP PHASE FAULT TRIP EARTH FAULT TRIP THERMAL REPLICA TRIP START TOO LONG TRIP STALLED ROTOR TRIP UNBALANCE PHASE TRIP LOSS OF LOAD TRIP DELOAD TR...

Page 48: ...orization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 47 Indice g Notes Disappearance of cut A and number of operations alarms is done by resetting the COUNTERS menu To cause the disappearance of the last fault or operation message it is possible to press on CLEAR key of the keyboard ...

Page 49: ... Date 05 2013 Edition 30 01 2014 Folio 48 Indice g 8 Connection of NPM800 relays 8 1 Rear view of NPM800 with location of the terminal blocks with short circuiting devices Extension board connectors E F G and RS485 2 is optional on the NPM800 and connector A is not used 1 6 A 1 5 G 1 7 D C AUX RS485 1 1 7 F E 1 5 B RS485 2 IB S1 IC S2 S1 S2 S1 IA S2 S1 S2 Io ...

Page 50: ...ew of the current terminal block with short circuiting devices 8 2 Rear view of NPM800 with location of the terminal blocks without short circuiting devices Extension board connectors E F G and RS485 2 is optional on the NPM800 and connector A is not used 1 6 A 1 5 G 1 7 D AUX IC RS485 1 1 7 F E 1 5 B RS485 2 S1 S2 S1 S2 S1 S2 S1 S2 IA IB C Io Side view of the current terminal block without short ...

Page 51: ...0 6 to 2 5 mm Auxiliary supply AUX Screw terminal block Section of wire 0 6 to 2 5 mm Relays optional board E and F Screw terminal block Section of wire 0 6 to 2 5 mm Digital inputs optional board G Screw terminal block Section of wire 0 6 to 2 5 mm Connection of the CTs IA to IO 4 mm ring type terminal Section of wire 6 mm For CTs inputs take care to follow the rotating sense of phases and the di...

Page 52: ...r release to third party is allowed without prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 51 Indice g 9 Connection of NPM800R NPM800RE relays 9 1 Rear view of NPM800R with location of the terminal blocks Case R2 ...

Page 53: ... the sole property of ICE No duplication nor release to third party is allowed without prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 52 Indice g 9 2 NPM800R Fixing rods ...

Page 54: ...CE No duplication nor release to third party is allowed without prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 53 Indice g 9 3 Rear view of NPM800RE with location of the terminal blocks Case R3 ...

Page 55: ... the sole property of ICE No duplication nor release to third party is allowed without prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 54 Indice g 9 4 NPM800RE Fixing rods ...

Page 56: ...to 3 For CTs inputs take care to follow the rotating sense of phases and the direction of the connection of each phase during the wiring 9 6 NPM800RE connections NPM800RE Case R3 Connections Terminal Blocks Location Auxiliary supply T1 4 5 Connection of the CTs 2 3 6 7 10 11 14 15 Relays A 16 17 18 19 Relay B T2 3 1 3 2 6 4 6 5 Relay C 9 7 9 8 Relays D T1 8 9 8 12 Relays E 20 21 22 23 Relay F T7 3...

Page 57: ... Blocks Characteristics T1 4 mm ring type terminal Section of wire 6 mm T2 Screw terminal block Section of wire 0 2 to 2 5 mm T3 Screw terminal block Section of wire 0 08 to 1 5 mm T4 Screw terminal block Section of wire 0 08 to 1 5 mm T6 Screw terminal block Section of wire 0 08 to 1 5 mm T7 Screw terminal block Section of wire 0 2 to 2 5 mm 9 8 NPM800R and NPM800RE diagrams Type of relay Observa...

Page 58: ...ength 1000 m resistance 100 ohms km capacity between wires 60 pF m capacity between wire and shield 100 pF m The NP800 and NP800R relays are fitted with one fixing clamp to hold the network cable and recover the shielding of the network cable the network cable must be stripped the shielding braid of the cable must be in contact with the clamp In order to ensure continuity of the cable and its eart...

Page 59: ...ection In order to adapt the impedance of the RS 485 connection two resistances of 120 ohms are necessary With this intention NP800 relays are fitted with a resistance of 120 ohms and a jumper provided for this purpose To carry out this adaptation according to the diagram below connect the terminal Rterm to the terminal T R of the two end relays of the connection thanks to the jumper The jumpers o...

Page 60: ...Rterm to the terminal T R of the end relay of the connection thanks to the jumper The jumpers of the other relays of the connection will have to be removed 10 3 Polarization of the RS 485 connection Polarization having to be single on a line to prevent the risks of transmission it is in this case recommended to use the supplies and resistances 470 ohms of polarization of the Master 10 4 RS 485 con...

Page 61: ...t is the sole property of ICE No duplication nor release to third party is allowed without prior authorization User s Guide NPM800 NPM800R NPM800RE Date 05 2013 Edition 30 01 2014 Folio 60 Indice g Reference A343H ...