USER`S MANUAL N11P TYPE
Contents
1. eowes p bu35 du39 par 353 238 33S 138 10 2d yoddns _ d pjouseiu Ayquenb jJeubig _ jo pury t ZAIP env uureje 10 yoddns Aejap adA pjouseiu piouseuu Ayquenb Jeubis UueIV _ jo pury z LAIP bd uoneziu o 0 0 0 0 ones one ues 0JdouAs Ayquenb quiod eaw jo jeuuojsue jeuuojsuen jndui jndui peAeldsip wesed l 777 JeqwunN quauing eBeyoA juaung eBeyoA joed 10 984 jndu ZH LA IH any na UAS duj Sod 16 The further change is similar In any moment the key release causes a jump to the first digit It is similarly in case of the value decrease A single pressure of the key causes a value decrease of one The hold of the w key pressure down causes a continuous decrease of the value down to the display of the 0 value The jump to the next digit follows after this value The further change is similar The key release in any moment causes a jump on the first digit In order to accept the set up parameter one must press the key Then2. key power counter will cause the resetting of the reactive power counter CEnS Resetting of the apparent The pressure of the lt key power counter will cause the resetting of the apparent power counter 21 CPAu Synchronisation of the 15 The pressure of the key minutes mean active power will cause the measurement start of the 15 minutes mean active power CUAu Synchronisation of the 10 The pressure of the key will minutes mean voltage cause the measurement start of the 10 minutes mean voltage MN Exit from the parameter The pressure of the lt key group of the chosen level causes the exit from the parameter group of the chosen level a nor Contact state 4 eee Relay Switched on 0 1 switched off Measured quantity PrL PrH PrH gt PrL b nor Contact state 1 switched off 0 switched on PrH Pro Measured quantity lt PrL 22 c OFF Contact state 1 Relay Relay switched on switched on 1 Switched off gt E Em Measured quantity d On Contact state Relay Relay Rela switched off switchedon switched off gt t t Measured quantit PrL PrH Fig 6 Alarm type a b normal switched off d switched on CAUTION A e Incase of On and OFF alarm types the writing down of PrL gt Pr
3. The writing of the 0 causes the refreshing every UAL on measurement switching off and diplay 500ms the blanking of displays Ind Switching off or on of the On Characteristic switched on user s individual linear OFF Characteristic switched off characteristic H1 Y1 Parameters of the individual In 4 digit execution H2 Y2 Characteristic On the base 1999 9999 of co ordinates of two points given by the user the meter assigns coefficients of the individual characteristic a and b Y aH b H1 and H2 measured value Y1 and Y2 expected value on the display In 5 digit execution 19999 99999 18 Setting of the decimal point This setting acts when the Setting possibilities in the 4 digit execution individual characteristic is 0000 switched on 000 0 When the characteristic is 00 00 switched off the decimal 0 000 point is set automatically In the 5 digit execution 00000 0000 0 000 00 00 000 0 0000 _ 1 Kind of input quantity type at U rms voltage P A2 Which the alarm is to react I rms current FrEq frequency P active power q reactive power 5 apparent power PF power factor tF ratio of reactive power to active power tg FI angle phase EnP active energy Enq reactive energy EnS apparent energy Au 15 minutes mean active power U Au 10 minutes mean voltage F Au 10 seconds mean frequency PrL1 Alarm lowe
4. 0 1 i v 0 5 u l Reactive energy 19999 99999 1999 9999 0 1 i v 0 5 u l Apparent energy 0 19999 0 9999 x 0 196 i v 0 5 u l 15 minutes active power 19999 19999 1999 1999 0 196 i v 0 5 u l 10 minutes voltage 1 100 0 1 100 0 0 196 i v 0 2 u l 10 minutes voltage 4 400 0 4 400 0 0 196 i v 0 2 u l 10 seconds frequency 10 00 100 00 10 00 99 99 0 1 i v 0 1 u l Current time 0 00 23 59 0 00 23 59 1 sekunda dobe The range of the displayed value is equal to the transformation ratio product maximal voltage rate maximal current rate Tru Tri Umax Imax 2 i v indicated value u l upper limit of the measuring sub range 3 error in a range 10 120 of the 1 U range 27 Measurement of the true rms a c voltage The voltage value is calculated according the formula trU transformation ratio of voltage transformer measuring transformer n number of samples in the period or in the multiple of the measured voltage instantaneous voltage value Basic error in reference conditions 0 1 i v 0 2 u l Calculation of the mean value in the walking period of time 1 xt U m Ug i l n averaging time in seconds Usk true rms value in the voltage period Usrsk mean value changing in the time of the rms voltage value Basic error 0 1 i v 0 2 u l Calculation of the 10 minute
5. programming of the voltage and current ratio programming of the alarm and analogue output with the reaction to an optional measured quantity independently of currently displayed values storage of maximal and minimal values of all input quantities resetting of counters active reactive and apparent energy synchronization of 15 minutes power 10 minutes voltage monitoring of set parameters values monitoring of all measuring quantities blocking of the parameter introduction by means of a password conversion of the measured quantity into any quantity on the base of an individual linear characteristic highlighting of any measuring quantity according to the order storage of counter states N11P digital panel meter enables the measurement of e true rms voltage 4 Uy p i l 1 10 e 10 minutes mean voltage U m Uy i l 2 e true rms ij nia ES 5 9 actiVe DOWOer io PS a2 47h le mean active power 0 to 3600 sec e g 15 minutes A E isl le active energy E aP i l e apparent POWER inre ieee 5 0 Ty le apparent energy 2745 i l reactive pOWOL eerie eee Q sign S p lw reactive energy eee 2740 i
6. 4 Key to Key to Acceptance decrease increase key the value the value diodes Erasing Cv lt b 4 digit execution key Key to Key to Acceptance decrease increase key the value the value Fig 3 Description of the meter faceplate 1 No exists in the 4 digit 20mm execution 11 Key functions acceptance key entry into the programming mode hold down during ca 3 seconds moving through the menu choice of the level moving through the monitoring menu of measured values selection of the next value entry into the change mode of the parameter value acceptation of the changed parameter value key to increase the value display of the maximal value display of the maximal value monitoring menu of measured parameters entry to the parameter group level moving through the chosen level change of the chosen parameter value increase of the value successive parameter in the monitoring mode Cw key to decrease the value display of the minimal value display of the minimal value monitoring menu of measured parameters entry to the parameter group level moving through the chosen level change of the chosen parameter value decrease of the value successive parameter in the monitoring mode resignation key entry to the menu of parameter monitoring hold down during ca 3 seconds exit from the monitoring menu of meter param
7. instrument has been disconnected from the supply voltage live com ponents and power connections must not be touched immediately because capacitors can be charged The housing and the door must be closed during operation 6 Maintenance and servicing Please observe the manufacturer s documentation Read all product specific safety and application notes in this service manual Before taking the N11P programmable digital meter housing out one must turn the supply off The removal of the instrument housing during the guarantee contract period may cause its cancellation 3 FITTING Prepare a 92 0 6 x 45 0 6 mm hole in the panel The thicknes of the mate rial from which the panel is made can not exceed 15mm One should introduce the meter from the front of the panel with disconnected supply circuit After introducing the meter fasten it by means of holders C CA lt 48 96 93 Fig 1 Overall dimensions 4 CONNECTION At the rear side of the meter there is a terminal strip seat A connector with screw terminals or a self locking connector is added to the meter depending on the meter type chosed in the ordering code The fig 2 shows the connection of external signals The description of the connec
8. l P active power factor seesseeseeseessessiesttsrestntttsrtnstneenstrntenee cos _ 0 e ratio of the reactive power to active power tgQ P e phase sign TC COS 1 voltage frequeney E 10 mean 10 seconds frequency Sir 552 i l External ratios of measuring current and voltage transformers are taken into consideration in measurement The ratio is optionally programmed With the meter we deliver a guarantee card 2 holders to fix the meter into a panel a plug with the screw connections or self locking connections a user s manual a set of stickers with units When unpacking the meter please check whether the type and execution code on the data plate correspond to the order 2 BASIC REQUIREMENTS SAFETY INFORMATION Symbols located in this service manual mean WARNING Warning of potential hazardous situations Especially important One must acquaint with this before connecting the N11P programmable digital meter The non observance of notices marked by these symbols can occasion severe injuries of the personnel and the damage of the instrument CAUTION Designates a general useful note If you observe it handling of the N11P programmable digital meteris made easier One must take note of this when the instrument i
9. parameters of the chosen level is carried out by means of the w and keys Parameter symbols are displayed alternately with their actual values In order to change the value one must use the key To resign of the parameter change one must press the key To exit from the chosen level one must select the symbol and press the key In order to exit from the programming matrix into measurement one must press the key The inscription HEY occurs and after ca 5 sec the meter will automatically enter into the measurement of the input quantity Way of changing the value of the chosen parameter In order to increase the value of the chosen parameter one must press the key A single pressure of this key causes a value increase of 1 The hold of the pressed key causes a continuous increase of the value down to the display of the 0 value The jump to the next digit follows after this value 15 ay ojui 9 Bid SAeldslp suonnoexe juo sjsix3 2 0 pul peyoeye s onsuejoeJeuo jenpiAipul y Aluo sisix3 4 Jamod Jelunoo Jejunoo Bjeue KBieue m Jo Jo jo Sunes jsel puepuejs auou s 1youAs Bumeser Burmese iuf Aejdsiq piomsseg
10. switch it off 12 When the parameter of the alarm signalling support is switched on lack of possibility to erase the signalling diode by means of the key combination Fig 4 The alarm still lasts The erased diode is immediately re lighted 13 Despite the fact that the alarm still remains the signalling diode does not light up Check if a delay of the alarm operation has not been introduced dLY parameter 14 Instead to display the measurement result the meter displays the parameter symbol alternately with its value despite we were not entered into the programming mode The meter works in the monitoring mode 15 A delay of the alarm operation has been introduced e g 30 measurements however after this time the alarm has not operate The lasting alarm state was shorter than the programmed e g during the lasting time of the alarm the state of alarm withdrawal has occurred In that case the meter begins counting the measurements from the beginning 9 PROGRAMMING EXAMPLES OF N11P METERS Example 1 Programming of an individual characteristic If we want to programme so that to the value 0 0 V will correspond the value 0 on the display whereas to the value 400 0 V will correspond the value 10000 one must 3 choose as the type of the input quantity the measurement of the voltage U chose the Ind parameter and switch the individual characteristic on chose the parameter H1 and in
11. tYP1 tYP2 2 3 OFF dLY1 dLY2 2 3 0 LEd1 LEd2 2 3 OFF SEC 5 0 Hour 5 0 00 JEd 5 On CAUTION If the meter works only as an ammeter one should chose the parameter SYn value PrAd in the menu 24 A 7 TECHNICAL DATA Panel meter dimensions Protection index ensured by the housing Protection index ensured from the terminal side Rated operating conditions supply voltage depended on the execution code supply voltage frequency ambient temperature airrelative humidity Power consumption Storage temperature Display field N11P4 N11P5 Indication range of the digital display N11P4 N11P5 Servicing Relay outputs programmable alarm thresholds three types of alarms see chapter 6 96 x 48 x 84 mm IP 50 IP 20 85 230 253 V a c d c 20 24 40 V a c d c 40 50 440 Hz 0 23 50 C 75 water vapour condensation inadmissible max 5 VA 20 85 C four 7 segment LED displays and two alarm diodes five 7 segment LED displays two alarm diodes and two diodes to the unit highlighting 1999 9999 19999 99999 four keys Cv C4 hysteresis defined by means of the lower and upper alarm thresholds signalling of alarm action by means of diodes programmable delay of the alarm operation two relay outputs 25 voltageless make contacts maximal load capacity voltage 250 V a c 150 V d c current 5 A 30 V d c
12. the writing of the parameter and display of its symbol follows alternately with the new value The pressure of the key during the change of the para meter will cause the resignation of the writing Table 1 Parameter symbol Description Range of changes Selection of the measured U rms voltage value I rms current FrEq frequency P active power q reactive power S apparent power PF power factor tF ratio of reactive power to active power FI angle phase EnP active energy Enq reactive energy EnS apparent energy P_Au 15 minutes mean active power U_Au 10 minutes mean voltage F_Au 10 seconds mean frequency Hour current Selection of the synchroniza nAP voltage synchronization tion of the input signal PrAd current synchronization 17 RanU Selection of voltage range 100U 100 V range 400U 400 V range Ranl Selection of current range 1A 1 A range 5A 5 A range trU Selection of voltage ratio In 4 digit execution 0 9999 In 5 digit execution 0 99999 trl Selection of current ratio In 4 digit execution 0 9999 In 5 digit execution 0 99999 Aur Selection of the averaging Cnt Arythmetic mean mode CntS Stepping window UAL Number of avaraged In 4 digit execution measurements 0 9999 The time of a single In 5 digit execution measurement is 500ms 0 99999 The measurement value iS
13. 05
14. 1 parameter and introduce the value 400 0 pass on the tYP1 parameter and choose the function designed as nor exit from the ALr1 level and pass on the ALr2 level pass on the P A2 parameter and introduce I choose the PrL2 parameter and introduce the value 5 000 pass on the PrH2 parameter and introduce the value 1 000 pass on the tYP2 parameter and choose the function nor Example 4 Programming of an alarm operating in the given interval with delay If we want that the alarm 1 will be switched on in the interval from 100 0 V up to 300 0 V and operated only after 10 sec one must e enter into the programming mode and choose the ALr1 level pass on the P A1 parameter and set U pass on the PrL1 parameter and introduce the value 100 0 pass on the PrH1 parameter and introduce the value 300 0 35 pass on the tYP1 parameter and choose the On function pass on the dLY1 parameter and set 10 if UAL 1 0 in the contrary dLY 10 UAL exit from the programming mode In case of the alarm state duration for a time longer than 10 sec the meter will switch the alarm relay on and the alarm diode will be lighted EXECUTION CODES N11P METER Inputs temperature programmable input 1 V d c 10 V d c 20 mA d c 200 mA 600 V d c 1 A d c 5 A d c revolutions frequency pulses period singla phase network parameters indicator for synoptic panels on order x lt x lt x lt x lt x lt
15. 250 V a c resistance load 1250 VA 150 W Fastness against supply decays acc EN 50082 2 all programming parameters storage counter state chosen on a display storage in any other case the active counter energy is storaged Electromagnetic compatibility immunity acc EN 50082 2 emission acc EN 50081 2 Safety requirements according EN 61010 1 standard N installation category III level of pollution 2 maximal voltage in relation to the earth 600 V 26 Parameters of the N11P meter prolonged overrunning of the upper range 20 Kind of input Indication range Basic error 2 5 digits 4 digits Rms voltage 1 100 0 1 100 0 0 196 i v 0 2 u l Rms voltage 4 400 0 4 400 0 0 196 i v 0 2 u l Rms current 0 01 1 000 0 01 1 000 0 196 i v 0 2 u l Rms current 0 05 5 000 0 05 5 000 0 196 i v 0 2 u l Frequency 10 00 100 00 10 00 99 99 0 196 i v 0 196 u l Active power 19999 19999 1999 1999 0 1 i v 0 5 u l Reactive power 19999 19999 1999 1999 0 1 i v 0 5 u l Apparent power 0 19999 0 1999 0 1 iv 0 5 u l coso 1 000 1 000 1 000 1 000 0 1 i v 1 u 1 9 tgo 100 0 100 0 100 0 100 0 0 1 i v 196 u 1 9 0 359 9 0 359 9 0 1 iv 1 Active energy 19999 99999 1999 9999
16. H will cause an automatic transcription of the value from the threshold PrL into PrH and from the threshold PrH into PrL The alarm type will not change Incase of a measuring range overrunning the relay reaction is concordant with written down PrL PrH and tYP parameters In spite of displaying the overrunning the meter will carry out the measurement as before e Incase of an individual characteristic switching on Ind On the measurement result is transformed linearly in accordance with introduced H1 Y1 H2 Y2 parameters The linear characteristic does not operate in case of selection as an input type of the current time e The meter currently checks up the value of the actually introduced parameter In case when the introduced value overruns the upper range of changes given in the table 1 the meter will automatically carry out the change into the minimal value Similarly in case when the introduced value overruns the lower range of changes given in the table 1 the meter will automatically carry out the change into the maximal value 23 Standard parameters of the meter Table 2 Parameter symbol Level in the matrix Standard value tYP 1 SYn 1 nAP RAnU 1 400U 1 trU 1 1 trl 1 1 Aur 1 Cnt UAL 1 2 Ind 1 OFF H1 Y1 H2 Y2 1 0 d P 1 1 A1 2 U P A2 3 PrL1 2 0 PrL2 3 400 0 lub 400 00 PrH1 2 0 000 lub 00 000 PrH2 3 5 000 lub 5 0000
17. PROGRAMMABLE DIGITAL PANEL METER N11P TYPE USER S MANUAL C PROGRAMMABLE DIGITAL PANEL METER N11P type USER S MANUAL CONTENTS T APPEIGCATION et eere a edens 5 2 BASIC REQUIREMENTS OPERATIONAL SAFETY 7 3JL ETING ite tee neg 9 4 CONNECTION toe 10 5s rise ter eterne 10 6 PROGRAMMING iu titii nter tite 15 15 TECHNICAL DATA tete tere 25 8 BEFORE FAILURE WILL BE DECLARED 33 9 PROGRAMMING EXAMPLES OF N11P METERS 34 EXECUTION 36 zu o 1 APPLICATION N11P programmable digital meters are destined to measure single phase pa rameters a c voltages and a c currents active reactive and apparent power power factor cosq ratio of the reactive power to the active power phase angle frequences active reactive and apparent energy 15 minutes active power 10 minutes voltage 10 seconds frequency Additionally the meter enables the indication of the current time A 5 or 4 digit display field 14 or 20mm high digits in red or green colour ensures a good readability at a long distance They realized other additional functions as e signalling the set alarm value exceeding e signalling the measuring range exceeding e automatic set up of the decimal point programmable measurement repetition rate programmable averaging type arithmetic mean steeping window
18. XX X gt lt x gt lt Unit field Number of display 4 20 mm high digits 4 5 x 14 mm high digits unit 5 Display colour red 0 green Supply voltage 230 V a c d c 24 V a c d c 2 Kind of terminals socked plug with screw connections 0 socked plug with self locking connections Execution standard execution 00 custom made execution XX Acceptance tests without a guality inspection certificate 0 with a guality inspection certificate 1 acc customer s agreement x Introduce the unit symbol 36 Order example N11P 5 0 1 0 00 1 kW means N11P digital meter of single phase network parameters with 5 displays in red colour voltage supply 230 V a c d c kind of terminal socket plug with screw connection standard execution with a quality inspection certificate with the highlighted kW unit In case of a custom made execution or need of more detailed technical information please contact our Export Department In case of any meter failure one must contact the nearest authorized service workshop The Manufacturer policy is one of continuous improvement and we reserve the right to make changes in design and specification of any products as engineering advances or necessity requires and revise the above specification without notice 37 38 39 _ _ _ _ _ _ _ _ _ _ _ _ _ _ l February 20
19. ation distances Do not touch any electronic components and contacts Instruments may contain electrostatically sensitive components which can easily be damaged by inappropriate handling Do not damage or destroy any electrical components since this might endanger your health Electrical connection Before switching the N11P programmable digital meter on one must 5 check the correctness of connection to the network In case of the protection terminal connection with a separate lead one must remember to connect it before the connection of the instrument to the mains When working on live instruments the applicable national regulations for the prevention of accidents must be observed The electrical installation must be carried out according to the appropriate regulations cable cross sections fuses PE connection Additional information can be obtained from the service manual The documentation contains information about installation in compliance with EMC shielding grounding filters and cables These notes must be observed for all CE marked products The manufacturer of the measuring system or installed devices is responsible for the compliance with the required limit values demanded by the EMC legislation Operation Measuring systems including N11P programmable digital meter must be equip ped with protection devices according to the corresponding standard and regu lations for prevention of accidents After the
20. eters and measured values resignation of the parameter change absolute exit from the programming mode The pressure of the key combination and holding down during Ca 3 sec causes the erasing of alarm signalling This operation exclusively acts when the support function is switched on The pressure of the wr key combination causes the erasing of all minimal values 12 The pressure of the 4 key combination causes the erasing of all maximal values The pressure and holding down of the key during ca 3 sec causes the entry into the programming matrix The programming matrix is secured by the safeguard code The pressure and holding down of the key during ca 3 sec causes the entry into the monitoring menu One must move through the monitoring menu by means of w keys In this menu all programmable meter parameters except service parameters are only accessible to the read out The exit from the monitoring menu takes place by means of the key On the monitoring menu parameter symbols are alternately displayed toge ther with their values The fig 4 shows the operation algorithm of the meter The pressure and holding down of keys during ca 3 sec causes the entry to the monitoring menu of measured value One must move through the monitoring menu by means of keys The pressure of the key causes the display of the successive symbol of the measured value alternately with the val
21. g cycle is treated as a single measurement LEd1 Support of the alarm On support switched on LEd2 Signalling In the situation OFF support switched off SEt Writing down of manufacturers A pressure of the 3 key settings Parameter values set causes the writing down of stan up by the manufacturer are dard parameters into the meter shown in the table 2 The execution of this operation is signalled by the inscription End SEC Introduction of a new In 4 digit execution password 1999 9999 In 5 digit execution 19999 99999 tSt Display test The test consists The pressure of the lt key on the consecutive switching causes the test switching on of digital display segments on The C25 key ends the test Alarm diodes and highlighted diodes of the unit should be lightened Hour Setup of the current time 0 00 23 59 The introduction of an incorrect hour will cause its writing into the memory but after the exit from the matrix the meter will make the correction of the error i e the introduction of the 0 70 hour will cause that the meter will treat that as minutes and set up 1 10 JEd Unit highlighting switching on On highlighting switched on OFF highlighting switched off CEnP Resetting of the active power The pressure of the lt key counter will cause the resetting of the active power counter CEnq Resetting of the reactive The pressure of the lt
22. inty if all display segments are efficient Enter into the service mode and switch the display test on Simultaneously the same segments should be lighted on all displays The state with blanked displays does nevel occur Otherwise submit the defect to the nearest authorised service workshop 7 During operations in the programming mode parameter values inconsistent with the range of changes given in the table 1 appear on the display Enter into the service mode and accept the SEt parameter The meter will introduce values in accordance with the table 2 8 A result inconsistent with our expectations appears on the display Check if the individual characteristic is not switched on In case of necessity enter into the service mode and accept the SEt parameter The meter will introduce parameters in accordance with the table 2 9 H1 Y1 H2 Y2 d P parameter symbols not displayed in the programming mode In case of switched individual characteristic off mentioned symbols are omitted 10 Despite of the alarm threshold exceeding neither the alarm relay nor the signalling diode is switched on Check the introduced delay of the alarm operations into the meter If need be correct the dLY Parameter 33 11 Despite of the relay switching off the alarm diode does not go out Check if the alarm signalling support is not switched on LEd parameter In case of need
23. nt and voltage range Measurement of the a c voltage frequency The frequency of the voltage is calculated according the formula 1 fe T T period of a c voltage f frequency current value of one period Basic error in reference conditions 0 1 i v 0 1 u l Calculation of the 10 seconds frequency _ly n averaging time in seconds fi frequency value in the period of the measured signal kr mean value changing in the time of the frequency value Basic error 0 1 i v 0 1 u l Preheating time 15 minutes Weight 0 2 kg Minimal measurement time 500 ms 32 8 BEFORE A FAILURE WILL BE DECLARED A SYMPTOMS PROCEDURE 1 The meter does not operate Check the connection of the feeder cable 2 Only the diodes are lighting Number of measurements 0 has been introduced The meter operates in the SLE mode The display is blanked EP 3 Only the horizontal dashes are displayed Check the correctness of the input signal connection See in the service manual 4 Only the inscription noC is displayed The meter is discalibrated Contact the nearest authorised service workshop 5 Lack of possibility to enter into the programming mode The inscription ErrC is displayed The programming mode is protected by th password If the user forgets which password has been introduced one must contact the nearest authorised service workshop e 6 Lack of certa
24. or 0 1 i v 0 5 u l Measurement of the a c apparent power The apparent power is calculated according the formula S trU etrI eU el trU ratio of the voltage transformer trl ratio of the current transformer Usk real rms value of the voltage Isk real rms value of the current Basic error in reference conditions 0 1 i v 0 5 u l Counting of the apparent power energy 1 n as Basic error 0 1 i v 0 5 u l 30 Measurement of a c reactive power The reactive power is calculated according the formula Q trU etrle signs trU ratio of the voltage transformer tri ratio of the current transformer S apparent power P active power Basic error in reference conditions 0 1 i v 0 5 u l Counting of the reactive power energy 1 n Eo 742 40 Basic error 0 1 i v 0 5 u l Measurement of the a c power factor cos The power factor is calculated according the formula P COS S P active power S apparent power Basic error in reference conditions 0 1 i v 1 u l in the 10 120 current and voltage range 31 Measurement of the ration of the reactive power to the active power tg The ratio of the reactive power to the active power is calculated according the formula Q Bug Q reactive power P active power Basic error in reference conditions 0 1 i v 1 u l in the 10 120 curre
25. r threshold In 4 digit execution PrL2 1999 9999 In 5 digit execution 19999 99999 PrH1 Alarm higher threshold In 4 digit execution PrH2 1999 9999 In 5 digit execution 19999 99999 19 tYP1 Alarm type nor normal On switched on 20 when the function of support is switched on after the withdrawal of the alarm state the signalling diode is not blank It signals the alarm state till the moment of its blanking by means of the combination of and x keys This function only and exclusively concerns the alarm signalling and then the relay contacts will act without support according the chosen alarm type tYP2 fig 6 shows the graphical illustration of alarm OFF switched off types H_On manually switched on till the time of the alarm type change the alarm output is switched on for good H_OF manually switched off till the time of the alarm type chan ge the alarm output is switched off for good dLY1 Delay of alarm operation In 4 digit execution dLy2 The parameter is defined in 0 9999 seconds that means that m one must give after how In 5 digit execution many seconds the alarm 0 99999 operation follows The alarm The introduction of 0 causes the switching off follows without operation at the moment of alarm delay The parameter takes appearance in account the number of averaged measurements UAL i e the whole averagin
26. s voltage 10 1 U e a 2 U a Basic error 0 1 i v 0 2 u l 28 Measurement of the true rms a c current The value of the current is calculated according the formula tri ratio of the current transformer n number of samples in the period or in the multiple of the measured current i actual value of the current Basic error in reference conditions 0 1 i v 0 2 u l Calculation of the mean value in the walking period of time 1 Lk m dos i l n averaging time in seconds Isk true rms value in the voltage period Isrsk mean value changing in the time of the rms current value Basic error 0 1 i v 0 2 u l Measurement of the a c active power The active power of the distorted current is calculated according the formula izi trU ratio of the voltage transformer trl ratio of the current transformer n number of samples in the period or in the multiple of the measured current actual value of voltage actual value of current 29 Basic error in reference conditions 0 1 i v 0 5 u l Calculation of the mean value the walking period of time 1 n Py D n averaging time in seconds Pi value of the active power in the period of the measured signal Psr mean value changing in the time of the active power value Basic error 0 1 i v 0 596 u l Calculation of the active power energy 1 n EE ah Basic err
27. s working inconsistently to the expectations Possible consequences if disregarded In the security scope the N11P programmable digital metermeets the require ments of the EEC Low Voltage directive EN 61010 1 issued by CENELEC Remarks concerning the operator safety 1 General e The N11P programmable digital meter is destined to be mounted on a panel e Non authorized removal of the required housing inappropriate use incorrect installation or operation creates the risk of injury to personnel or damage to equipment For more detailed information please see the service manual All operations concerning transport installation and commissioning as well as maintenance must be carried out by qualified skilled personnel and national regulations for the prevention of accidents must be observed e According to this basic safety information qualified skilled personnel are persons who are familiar with the installation assembly commissioning and operation of the product and who have qualifications necessary for their occupation 2 Transport storage Please observe the notes on transport storage and appropriate handling Observe the climatic conditions given in Technical Data 3 Installation The N11P programmable digital meter must be installed according to the regulation and instructions given in this service manual Ensure proper handling and avoid mechanical stress Do not bend any components and do not change any insul
28. tor is also printed on the meter housing 2 3 4 5 91011 12 13 14 15 e 18 5 8 or en N Alarm 1 Alarm 2 NL 100 V Supply or400 V 5 5 T appo B RNAV P N Fig 2 N11P connection way In case of a meter working in an environment of high perturbances one should use external filters As a feeder cable one must use a two wire cable and choose the lead cross section such that in case of a short circuit from the device side the protection of the cable was ensured by means of the electric installation fuse Requirements related to the feeder cable are regulated by the EN 61010 1 p 6 10 standard 5 HANDLING After switching the meter on its type and next the program version are di splayed After ca 10 sec the meter transists automatically into the measuring mode and the input signal value is displayed The meter blanks automatically insignificant zeros Values of the decimal point and the multiplier in the measu rement of voltage current or power are automatically set up taking into consi deration assigned ratios 10 The exceeding of the alarm threshold is signalled by means of alarm diodes 1 and 2 The basic unit of the measured value is automatically highlighted by the meter 1 a 5 digit execution Unit Ofeccu 12 Alarm EE CA diodes ey
29. troduce the value 0 0 pass on the Y1 parameter and introduce the value 0 pass on the H2 parameter and introduce the value 400 0 pass on the Y2 parameter and introduce the value 10000 pass on the d P parameter and set the point on 00000 4 Example 2 Programming of an inverse individual characteristic If we want to programme so that to the value 5 000 A will correspond the value 0 00 on the display whereas to the value 0 000 A will correspond the value 100 00 one must choose as the type of the input quantity the measurement of the current I choose the Ind parameter and switch the individual characteristic on choose the H1 parameter and introduce the value 0 000 pass on the Y1 parameter and introduce the value 100 00 pass on the H2 parameter and introduce the value 5 000 pass on the Y2 parameter and introduce the value 0 00 pass on the d_P parameter and set the decimal point on the position 000 00 Example 3 Programming of the alarm with hysteresis If we want to programme the alarm 1 operation so that the alarm will be switched on at the value 400 0 V whereas switched off at the value 100 0 V and the alarm 2 so that at the value 5 000 A the alarm will be switched off and switched on at the value 1 000 A one must e enter into the programming mode and choose the level with the ALr1 symbol pass on the P_A1 parameter and set U pass on the PrL1 parameter and introduce the value 100 0 pass on the PrH
30. ue and the multiplier of this value in one of the shape 10E0 10E3 10E6 10E9 The pressure of the wr key causes the display of the minimal value of the currently displayed value whereas the pressure of the key causes the display of the maximal value of the currently displayed value The exit from the menu is proceeded by means of the key 13 6 euis Burse13 Burser3 40 v Bid uonduosul Jo Aejdsiq uiseag puomssed r J c5 9956 LINAWAYNSVAN uiu Jo Ae dsiq Jo Aejdsiq SJojouJeJed Jo nuew 6uuolluoN painseaw jo 6uuolluoWN 14 The appearance of the following symbols on the digital displays means Incorrectly introduced security code 2 Overrunning of the upper measuring range EE Overrunning of the lower measuring range 6 PROGRAMMING The key pressure and its holding down during ca 3 seconds causes the display of the security code symbol SEC alternately with the 0 value set up by the manufacturer The writing of the correct code causes the entry into the programming matrix The transition matrix into the programming mode is shown on the fig 5 We choose the level by means of the key whereas the entry and moving through
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