Landis & Gyr Dialog - ZxD120AP Active energy meter for direct connection User manual

Transcription

1 Landis & Gyr Dialog - ZxD120AP Active energy meter for direct connection User manual Landis & Gyr Dialog ZMD120AP ZFD120AP H en

2 Revision history Information about document indexes, revision and corrections carried out respectively Index Date Name/phone Comments E. Ineichen, 3016 Adaptation from version..am to version..ap 2001 Siemens Metering Ltd. All rights reserved

3 Introduction Introduction Range of validity Purpose Target group Conditions Subdivision The present user manual applies to the basic version of the meters: ZMD120AP (for three-phase four-wire networks) and ZFD120AP (for three-phase three-wire networks) Explanations without specific type details apply to both types. The user manual contains all the information required for application of the meters for the intended purpose. This includes: Provision of knowledge concerning characteristics, construction and function of the meters Information about possible dangers, their consequences and measures to prevent any danger Details concerning the performance of all work throughout the service life of the meters (parametrizing, installation, commissioning, operation, maintenance, shutting down and disposal) The contents of this user manual are intended for technically qualified personnel of energy supply companies responsible for the system planning, installation and commissioning, operation, maintenance, decommissioning and disposal of the meters. The user of this manual has received instruction in basic electrical principles, in particular the various principal types of circuit for energy measurement. This user manual is divided in a logical manner suitable for learning and application, i.e. the individual chapters follow the sequence of information probably required during the various phases of the service life of the meters. This provides the following structure: Chapter 1 Description of unit Chapter 2 Safety Chapter 3 Construction and function Chapter 4 Control elements and displays Chapter 5 Parameter setting Chapter 6 Installation and commissioning Chapter 7 Data readout Chapter 8 Maintenance and service Chapter 9 Measures in event of faults Chapter 10 Decommissioning, disposal Siemens Metering Ltd 0-3

4 Table of contents Table of contents 1 Description of unit Review General view Purpose of use Field of application Type designation Review of main characteristics Technical data Voltage values Current values Starting values Frequency values Power consumption Measuring accuracy Output values Control inputs Serial interface Voltage behaviour External influences Weight and dimensions Connections Connection diagrams Meters for three-phase three-wire networks Meters for three-phase four-wire networks Safety Safety information Responsibilities Safety regulations Construction and function Meter construction Measuring principle Overview Signal generation Signal processing Control elements and displays Control elements Liquid crystal display Basic layout Operating display Test diode Pulse output r Parameter setting Values selectable Installation and commissioning Introduction Material and tools required Siemens Metering Ltd

5 Table of contents 6.3 Mounting the meter Connecting meter Check of connections Commissioning and functional check Data readout Data readout via optical interface CS interface Maintenance and service Meter check Meter testing Test mode Measuring times Test diode Installation of meters on a testing device Creep test Starting test Input of formatted commands Measures in event of faults Error messages Structure of an error message Error groups Operating faults Disconnecting meters Repairing meters Decommissioning, disposal Siemens Metering Ltd 0-5

6 Table of contents 0-6 Siemens Metering Ltd

7 User manual ZFD120AP / ZMD120AP basic version Description of unit 1 Description of unit 1.1 Review General view View of meter: Fig. 1.1 General view of meter <neues Foto> Case The meter case is made of antistatic plastic with glass-fibre reinforced lower section and terminal block. The upper part of the case is provided with a transparent plastic viewing window to show the dial of the meter. The terminal cover is available in two different versions (short and long) to ensure the required space for the connections. The contacts to supply an extension installed later are fitted under the additional cover in the upper part of the case. Face Plate All relevant data for the meter are provided on the face plate inscribed in country or Utility specific form. Openings ensure an uninterrupted view of the liquid crystal display, the test diode and optical interface for automatic readout of meter data. Siemens Metering Ltd 1-1

8 Description of unit Purpose of use Field of application The ZMD120AP or ZFD120AP meters record active energy consumption in three-phase four-wire or three-phase three-wire networks. For this purpose they are directly installed in the supply line by the energy supply company and are read regularly for energy charging purposes. Any other application of these meters is not considered use for the intended purpose. Basic version Extensions The meters can be used for currents up to 100 A. They form the basic version of this meter series fitted with energy registers for one to four tariffs, a serial interface with optical input/output for data recording and a pulse output. Their simple functions predestine these meters for applications by smaller consumers, particularly for households. With various extensions the basic version can be supplemented with additional functions. Possible extensions: Time switch or ripple control receiver for tariff control RS232 interface for remote scanning of meter data Multiple energy tariffs Demand tariffs (maximum demand for medium consumers) Pulse inputs Outputs for pulses and/or control signals Extensions can also be added later on to the basic version without requiring the meter to be dismantled or affecting its calibration status. More complete details about the individual extensions can be found in the associated separate operating instructions Type designation ZMD 120 AP t CS Types of circuit ZFD Three-phase three-wire network (Aron circuit) ZMD Three-phase four-wire network Connection versions 120 Direct connection (IEC Class 2) Measuring versions AP Active energy meter, modular extendable (plug and play) Tariff functions e t with single tariff register with multiple tariff register Interface / Pulse transmission CS r53 Interface according to IEC for remote readout Transistor output, S0 according to IEC , pulse length ti variable This user manual does not normally specify the codes for the tariff functions and pulse transmission in the type designation, except when this is important for better understanding. 1-2 Siemens Metering Ltd

9 Description of unit Review of main characteristics The meters have the following basic characteristics: Recording of active energy in one or more tariffs External tariff control via tariff terminals Display of data with a liquid crystal display (LCD) Measuring elements in proven DFS technology (Direct Field Sensor based on the Hall effect) with excellent measuring characteristics, including flat load curve, high stability and good protection against interference Compliance with accuracy class 2 according to IEC Flexible measuring system through definition of different variables by software (single parameterisation by manufacturer) Correct measurement even with failure of individual phases or when used in two or single-phase networks Wide range of measurement from starting current to maximum current Serial interface with optical input/output for direct readout of meter data for communication with an extension CS interface for remote scanning of data or Pulse output for transmission of constant pulses Installation aids Indication of presence of phase voltages, rotating field and direction of energy Power indicator Storage of additional information such as operating times (readable via optical interface or, if present, the CS interface). Siemens Metering Ltd 1-3

10 Description of unit 1.2 Technical data Voltage values Rated voltage Un ZMD120AP Nominal value... 3 x 230/400 V Permissible range... 3 x 220/380 V to 3 x 240/415 V Note: This meter can also be operated with only one or two phases without loss of accuracy. ZFD120AP Nominal value... 3 x 230 V Permissible range... 3 x 220 V to 3 x 240 V Note: this meter can also be operated with only two phases without loss of accuracy. Voltage range to 1.15 x Un Current values Basic current Ib... selectable: 5, 10, 20 or 40 A Maximum current Imax... selectable: 60, 80 or 100 A Starting current according to IEC % Ib typical... approx. 0.3 % Ib Note: The meter uses the starting power, not the starting current, to determine the starting limit. Maximum measuring range... approx. 15 ma up to 100 A Loading capacity Measurements A Thermal A Short-circuit 10 ms... 10'000 A Starting values Typical starting power related to basic current Ib A M circuit... approx W F circuit... approx W The meter in the M circuit measures as soon as a phase reaches the specified starting power. For the meters in the F circuit the power in all phases must reach the specified value. 1-4 Siemens Metering Ltd

11 Description of unit Frequency values Rated frequency fn... selectable: 50 or 60 Hz Frequency range... see chapter "Measuring accuracy" Power consumption Power consumption in voltage path Active energy at Un (typical) W Apparent energy at Un (typical) VA Power consumption in current path Apparent energy at 10 A (typical) VA Measuring accuracy Accuracy Accuracy class to IEC Class 2 Absolute accuracy (with universal loading and cosϕ=1)... ± 2.0 % Load dependence with universal loading % to -0.3 % + 2 % + 1 % 0 % - 1 % - 2 % A Fig. 1.2 Typical load curve with universal loading Load dependence with single-phase loading % to -0.4 % + 2 % + 1 % 0 % - 1 % - 2 % A Fig. 1.3 Typical load curve with single-phase loading Siemens Metering Ltd 1-5

12 Description of unit Effect of voltage... ± 0.3 % + 1 % 0 % - 1 % % Un Fig. 1.4 Effect of voltage on measuring accuracy (typical) Effect of frequency... ± 0.2 % Output values + 1 % 0 % - 1 % % Un Fig. 1.5 Effect of frequency on measuring accuracy (typical) Display Type... LCD liquid crystal display Digit size... 7 mm Number of positions... up to 8 Meter constant R Selectable: , 1000, 5000 or imp/kwh Test output Type... Infrared LED Pulse frequency (dependent on meter constant R and measured value) at Un and 10 A... approx. 1, 2, 10 or 20 Hz Pulse length... approx. 2 ms CS interface Type... serial, bi-directional current interface Standard... IEC / DIN Operating conditions Rated voltage V DC Max. voltage V DC Transmitter current Condition "On"... min. 11, typ. 20, max. 30 ma Condition "Off"... max. 2.5 ma Receiver current Condition "On"... min. 9, typ. 20, max. 30 ma Condition "Off"... max. 3 ma Max. baud Baud Max conductor length depending on environment and connecting cable Insulation resistance to meter... 4 kv 1-6 Siemens Metering Ltd

13 Description of unit Pulse output r53 Type... S0 interface Standard... IEC / DIN Values selectable:... 1, 2, 3.33, 5 or 6.66 Wh/imp resp. pulse constant , 500, 300, 200 or 150 imp/kwh Operating conditions Supply voltage (nominal value) V DC Maximum supply voltage V DC Current to 20 ma DC Pulse length... selectable: 20, 40 or 80 ms Maximum line length m NOTE The pulse output r53 is only conditionally suitable for testing the meter (e.g. no measurement of load curve) owing to its special method of operation (refer also to 4.4). 0.9 i On status 0.5 i 0.1 i t T <_ 5 ms t On > _ 30 ms t T Off status t > _ Off 30 ms Fig. 1.6 Pulse shape according to DIN Control inputs Tariff control Voltage values Control voltage Ut up to 240 V Permissible range up to 1.15 x Ut Current input... < 2 ma ohmic at 230 V Serial interface Optical interface Type... serial, bi-directional interface Standard... IEC Application Data readout according to IEC (all data) Data readout according to DLMS (single data values) Transmission of formatted commands to the meter Communication with extensions Siemens Metering Ltd 1-7

14 Description of unit Voltage behaviour Voltage interruption Blocking of inputs and outputs... immediate Standby operation... for 1 s Data storage... after 1 s Disconnection... after approx. 2.5 s Un Inputs and outputs locked Tariff section on stand by operation Data saved Meter disconnected 0 after 1 s > after about 2,5 s > t Fig. 1.7 Behaviour in event of voltage failure Restoration of voltage Ready for service (depending on duration of failure)... after 1 to 5 s* Recognition of energy direction and phase voltage... after 1 to 3 s* * operated with 3 phases Un Detection of All functions energy direction and available phase voltages 0 t max 3 s > max 5 s > Fig. 1.8 Behaviour when voltage restored External influences Temperature range Operation C to +60 C Storage C to +70 C Temperature coefficient Range... from -20 C to +55 C Typical mean value... ± 0.0 % per K With cosϕ=1 (from 0.1 Ib to Imax)... ± 0.02 % per K With cosϕ=0.5 (from 0.2 Ib to Imax)... ± 0.03 % per K 1-8 Siemens Metering Ltd

15 Description of unit [%] Error Maximum +1.0 Medium value +0.5 Minimum required by IEC: 0.05 % / K over 20 K between -25 and + 55 ºC Temperature [ ºC ] Fig. 1.9 Temperature behaviour Insulation strength... 4 kv at 50 Hz for 1 min. Impulse voltage strength Impulse voltage... 8 kv Rise time of impulse voltage µs Decay time of impulse voltage µs Source resistance of generator Ω Protection class... IP 52 to IEC Electromagnetic compatibility Electrostatic discharges... to IEC Contact discharges... 8 kv Electromagnetic high frequency fields... to IEC MHz to 500 MHz... at least 10 V/m 100 khz to 1 GHz... typical 30 V/m Line transients... to IEC for current and voltage circuits... 2 kv for auxiliary circuits > 40 V... 1 kv Radio interference suppression... to IEC/CISPR 22 Class B Siemens Metering Ltd 1-9

16 Description of unit Field strength [V/m] required by IEC: satisfied by ZxD120AP: 10 V per m, from 20 to 500 MHz 30 V per m, from 0.1 to 2000 MHz 10 ZxD120AP IEC Frequency [MHz] Fig Electromagnetic compatibility Weight and dimensions Weight... approx. 1.0 kg External dimensions... comply with DIN Width mm Height (with short terminal cover) mm Height (with standard terminal cover) mm Depth mm Suspension triangle Height (suspension eyelet open) mm Height (suspension eyelet covered) mm Width mm Terminal cover Short... no free space Standard mm free space To DIN (black) mm free space 1-10 Siemens Metering Ltd

17 Description of unit Fig Meter dimensions (standard terminal cover) Connections Phase connections Type... screw type terminals Diameter mm Maximum conductor cross-section cable mm 2 strand mm 2 Minimum conductor cross-section... 4 mm 2 Screw dimensions... M6 x 14 head diameter... max. 6.6 mm cross-slot... type Z, size 2, to ISO slot /+0.06 mm Tightening torque... max. 3 Nm Adaptation to plug adapters for Geyer terminals, ODU contacts, Amphenol Tuchel plugs is ensured. Siemens Metering Ltd 1-11

18 Description of unit Other connections Type... screwless spring-loaded terminals Maximum current of voltage outputs... 1 A Maximum voltage of control inputs V Maximum voltage r53 (observe polarity) V DC Control inputs Voltage outputs U1 U2 U3 N G E1/E2 CS interface or Transmission contact constant pulses CS or r53 L1 L2 L3 N Phase connections Spacings of terminal openings Spacings of terminal stampings for smaller conductors Fig Normal terminal layout and dimensions Spacings of terminal holes Spacings of terminal embossing for smaller conductors Fig Terminal layout and dimensions with terminal opening diameter of 9.5 mm 1-12 Siemens Metering Ltd

19 Description of unit 1.3 Connection diagrams NOTE The following connection diagrams should be considered examples. The connection diagram imprinted on the dial or placed in the terminal cover is always binding Meters for three-phase three-wire networks r L1 L2 L3 x x x S0 Fig Connection diagram ZFD120APer Meters for three-phase four-wire networks r L1 L2 L3 N x x x x x x S0 Fig Connection diagram ZMD120APer53 Siemens Metering Ltd 1-13

20 Description of unit CS G E1 E L1 L2 L3 N x x x x x x V Fig Connection diagram ZMD120APtCS for three or four tariffs CS G E1 E L1 L2 L3 N x x x x x x V Fig Connection diagram ZMD120APtCS for two tariffs 1-14 Siemens Metering Ltd

21 Safety 2 Safety 2.1 Safety information Attention is drawn as follows in the individual chapters of this user manual with classified word symbols and pictographs to the relevant danger level, i.e. the severity and probability of any danger: WARNING For a possibly dangerous situation, which could result in severe physical injury or fatality. CAUTION For a possibly dangerous situation, which could result in minor physical injury or material damage. NOTE For a possibly dangerous situation, in which the product or an article in its environment could be damaged and for general details and other useful information to simplify the work. 2.2 Responsibilities In addition to the danger level, all safety information also describes the type and source of the danger, its possible consequences and measures to counteract the danger. The owner of the meters normally the power supply company is responsible that all persons engaged on work with meters: 1. Have read and understood the relevant sections of the user manual. 2. Are sufficiently qualified for the work to be performed. 3. Strictly observe the safety regulations (according to section 2.3) and the operating information in the individual chapters. In particular, the owner of the meters bears responsibility for the protection of persons, prevention of material damage and the training of personnel (Siemens Metering Ltd. provides training courses for this purpose on specific equipment; please contact the relevant agent if interested). Siemens Metering Ltd 2-1

22 Safety 2.3 Safety regulations The following safety regulations must be observed at all times: The meter connections must not be under voltage during installation or when opening. Contact with live parts is dangerous to life. The relevant preliminary fuses should therefore be removed and kept in a safe place until the work is completed, so that other persons cannot replace them unnoticed. Local safety regulations must be observed. Installation of the meters must be performed exclusively by technically qualified and suitably trained personnel. The meters must be held securely during installation. They can cause injuries if dropped. Meters which have fallen must not be installed, even if no damage is apparent, but must be returned for testing to the service and repair department responsible (or the manufacturer). Internal damage can result in functional disorders or short-circuits. The meters must on no account be cleaned with running water or with high pressure devices. Water penetrating can cause short-circuits. 2-2 Siemens Metering Ltd

23 Construction and function 3 Construction and function 3.1 Meter construction The internal construction of the meters will not be described in detail here, since they are protected by two calibration seals when delivered, following calibration and official certification. It is not permitted to open the meters after delivery. Any extensions are fitted outside the calibration seals (refer to separate operating instructions for the individual extensions). The figure below shows the parts of the meter visible from outside Fig. 3.1 Front view of meter 1 Lowerable suspension hanger 2 Lugs for attaching an extension 3 Screws for upper part of case with calibration seals 4 Upper part of case 5 Face plate (see Fig. 3.2 for details) 6 Cover for contacts to supply an extension 7 Terminal cover with screws and factory seals A terminal block with all connecting terminals for the meter are situated under the terminal cover. Two factory seals in the fixing screws for the terminal cover prevent unauthorised access to the phase connections to prevent unrecorded power consumption. Siemens Metering Ltd 3-1

24 Construction and function The arrangement of the various connecting terminals is shown in Fig (section "Connections" The dial is configured to the specific data of the customer. It contains all relevant details for the meter. Openings provide a clear view of the LCD liquid crystal display, test diode and the optical interface for automatic readout of the meter data Low-rate tariff High-rate tariff L1 L2 L kw 1000 imp/kwh Three-phase four-wire meter ZMD120APtCS Nr x 230/400 V 10 (80) A 50 Hz Kl Landis & Gyr Dialog kwh 1 2 Low-rate tariff High-rate tariff 1 2 Energy total L1 L2 L3 N G E1 E x x x x x x V CS Readout Fig. 3.2 Basic layout of face plate 1 Liquid crystal display (LCD) 2 Displayed values 3 Meter constant R 4 Test diode (infrared) 5 Field for certification symbol 6 Symbol for double protective insulation 7 Symbol for type of circuit 8 Optical interface 9 Measured values (tariffs) 10 Meter data 11 Connection diagram 12 Field for ownership designation 13 Equipment number as barcode The control elements and indications are described more fully in chapter Siemens Metering Ltd

25 Construction and function 3.2 Measuring principle NOTE The following explanations refer exclusively to the meter type ZMD120AP (with 3 sensors). The ZFD120AP is used rather rarely and differs from the ZMB120AP firstly by the number of sensors in the measuring system and secondly by individual variations in measuring behaviour. These are not specially described here Overview The measuring principle of the meters is first briefly described by means of the general block diagram. Individual functional blocks are then described in a little more detail if necessary for understanding. Ut Control inputs LCD display L1 L2 L3 N Measuring system DFS DFS DFS Microprocessor Test diode Optical interface r53 or CS + - Power supply Voltage monitor EEPROM memory r53: Pulse output CS: Interface for remote readout Fig. 3.3 Block schematic diagram for ZMD120AP Inputs Outputs The main inputs to the meter are shown on the left. Phase connections (L1, L2, L3) and neutral for the energy measurement for the three-phase supply to the meter Control inputs (E1, E2) for changeover of the energy tariff The main meter outputs are shown on the right (also input to optical interface). LCD liquid crystal display for reading the measured amount of energy on the spot (simple 8-digit display with additional information for direction of energy, presence of phase voltages, rotating field, power applied and present tariff) Test diode (infrared) Optical interface for automatic data readout on site by means of suitable communication unit (hand held terminal) and for communication with an extension CS interface for remote scanning of data or Pulse output for transmission of constant pulses Siemens Metering Ltd 3-3

26 Construction and function Power supply Measuring system Signal processing Memory The supply voltages for the meter electronics are obtained from the threephase system. A voltage monitor ensures efficient operation and data retention in the event of a voltage failure, as well as correct starting following restoration of the voltage. Three measuring elements in the proven DFS technology (Direct Field Sensor based on the Hall effect) generate a signal proportional to the power in each phase from the phase voltage applied and the phase current flowing. This signal is converted to a digital signal for further processing by the microprocessor. The microprocessor summates the digital signals in the individual phases and forms energy components. It separates these components according to positive or negative sign. It then processes them in accordance with the meter constant and feeds them to the relevant tariff register, which determines the tariff control. The microprocessor also controls data communication with the display and serial interface as well as ensuring safe operation in the event of a voltage failure. A non-volatile memory (EEPROM) contains the parameter set of the meter and secures the billing data against loss due to voltage failure Signal generation The DFS sensor with its Hall element obtains the phase current from the magnetic field of the current loop and the phase voltage from the resistance divider. Analogue-digital converters convert both variables to digital voltage and current signals, which are multiplied by the following digital multiplier to obtain a signal proportional to the power. This is fed to the microprocessor, which adds the signal to those of the other phases and transfers the total to the corresponding energy register. The direction of energy is contained in the digital signal. I L1 Phase L1 A D DFS Test diode UL1 A D Digital Multiplier Pulse generator I L2 Phase L2 UL2 A D A D DFS digital addition Sum Li Digital Multiplier I L3 Phase L3 A D DFS UL3 A D Digital Multiplier Fig. 3.4 Signal generation in the measuring system of the ZMD120AP The microprocessor generates the pulses for the test diode from the digital sum corresponding to the meter constant R. 3-4 Siemens Metering Ltd

27 Construction and function The digital signals in the individual phases are also available for processing in an extension (refer to separate operating instructions for the individual extensions) Signal processing The meters record the active energy in the 3 phases, but separated according to energy direction. For this purpose the microprocessor summates the digital signals of the sensors and stores the energy consumption in the relevant energy registers. If the sum of the sensor signals is negative, then and only is the measured quantity -A produced from vectorial addition. The arrow of the energy direction indication accordingly points in the opposite direction. This also applies to summation of magnitudes for which both measured quantities +A and -A can have values (see following example in Fig. 3.6). The parameterizing determines the type of summation. As an aid to installation the meter can also indicate when the sum is indeed positive, but one or two phases are of negative energy direction. This also applies to a negative sum and individual positive phases. Measured quantities Summation +A -A A1+A2+A3 or IA1I+IA2I+IA3I +A A1 +A A2 +A A3 +/- +/- +/- Start detection A A A ZMD120 only Measuring system L1 L2 L3 N Calibration DFS DFS DFS +/- +/- +/- +/- +/- +/- K K K Fig. 3.5 Signal processing diagram for meter ZMD120AP Calibration Start detection Summation With a calibration function the microprocessor first assesses the signal from the individual sensors on the basis of their deviations. These are determined and stored during the final testing of the meter. The microprocessor then compares the power present with the minimum starting power specified. The signals are only passed on for summation when the minimum starting power is exceeded. Summation can take place in two ways: vectorial, i.e. negative values are subtracted from positive by magnitude, i.e. +A only includes the positive components +A1, +A2, +A3 -A only includes the negative components -A1, -A2, -A3 Siemens Metering Ltd 3-5

28 Construction and function Measured quantities Summation +A -A + - A1+A2+A3 +/- +/- +/- Start detection A1 A2 A3 Example: Sum with negative phase A1 A2 A3 +A A1 A2 A3 Fig. 3.6 Vectorial summation of phases in the ZMD120AP As in previous meters (and also the Ferraris meters) the meter adds the values in the individual phases together with the sign. If the signs are different (energy directions) the sum +A corresponds to the difference of the positive (+A1, +A2) and negative (-A3) values as shown in the example above. Measured quantities +A -A Summation +A = I+A1I+I+A2I+I+A3I -A = I-A1I+ I-A2I+ I-A3I /- +/- +/- Start detection A1 A2 A3 A1 A2 A3 -A A3 A1 A2 +A Fig. 3.7 Summation of magnitudes of phases in the ZMD120AP Summation of the magnitudes separates the positive from the negative values in the individual phases. Measured quantity +A therefore only contains the positive values, -A only the negative values, provided these are present. Summation of magnitudes produces a larger +A from negative phase values than from vectorial summation as the above example shows. Both measured quantities can have values here at the same time, but with vectorial summation always only one of the two. 3-6 Siemens Metering Ltd

29 Construction and function Measured quantities One or two summation signals +A/-A result from the individual phases depending on the type of summation. Together with the phase signals, this forms the measured quantities separated according to energy direction (+/-): +A, -A Total active energy drawn (+) or supplied (-) +A1, -A1 Active energy phase L1 drawn (+) or supplied (-) +A2, -A2 Active energy phase L2 drawn (+) or supplied (-) +A3, -A3 Active energy phase L3 drawn (+) or supplied (-) Measured values Selection for M1 and M2 (parametrizing) Measured quantities M1 +A -A M2 A Σ A +A - -A +A + -A M3 M4 M5 M6 M7 M8 +A1 +A2 +A3 -A1 -A2 -A3 Energy total register 1 Energy total register 2 Energy total register 3 Energy total register 4 Energy total register 5 Energy total register 6 Energy total register 7 Energy total register 8 Fig. 3.8 Measured value formation and assignment for meter ZMD120AP Measured value formation Measured value assignment Energy registers Tariff Measured values M1 and M2 are formed as follows from measured quantities +A and -A in accordance with the parametrizing: + A Active energy drawn - A Active energy supplied A Difference energy drawn minus energy supplied Σ A Sum of energy drawn plus energy supplied Measured values M3 to M8 correspond to measured quantities +A1 to -A3. Measured values M1 to M8 are permanently assigned to the energy total registers 1 to 8 (independent of tariff control). 4 energy registers are available, which can in principle be freely assigned to the measured values M1 to M8. The meter is designed for one to four tariffs. The tariff control connects the measured values specified by the parametrizing to the necessary registers, e.g. registers 1 and 2 to measured value M1 for two tariffs. The remaining registers can be used for example for the measured value M2. The power supply company can therefore use the meters with several tariffs for both energy directions. Siemens Metering Ltd 3-7

30 Construction and function Assignment of measured value / energy register corresponding to parametrizing Tariff control Energy register 1 Energy register 2 Energy register 3 Energy register 4 Operating time tariff 1 Operating time tariff 2 Operating time tariff 3 Operating time tariff 4 M1 M2 M3 M4 M5 M6 M7 M8 Measured values Total operating time Fig. 3.9 Tariff principle Tariff control With several tariffs, the control inputs E1 or E2 changeover the tariffs (4 statuses are possible with 2 input signals). The parametrizing determines all assignments: Status control input > tariff control signal Tariff control signal > energy register Tariff control signal > register operating time per tariff Tariff control signal > tariff arrow in display Control inputs E1 and E2 E1 E2 0 : no voltage 1 : voltage at input only E1 only E2 E1 and E Energy register 1 Energy register 2 Energy register 3 Energy register 4 Operating time tariff 1 Operating time tariff 2 Operating time tariff 3 Operating time tariff 4 Tariff arrow 1 Tariff arrow 2 Tariff arrow 3 Tariff arrow 4 TS1 Assignment status control input > tariff control signal TS2 TS3 TS4 Assignment TS > energy register Assignment TS > reg. operating time per tariff Assignment TS > tariff arrow in display TS : Tariff control signal Fig Principle of tariff control 3-8 Siemens Metering Ltd

31 Construction and function The following examples of tariff control show a dual and a triple tariff. Two-rate tariff controlled via E1 Control inputs E1 only E1 and E2 E E High rate tariff HT Low rate tariff LT Operating time HT Operating time LT Tariff arrow HT Tarif arrow LT TS1 TS2 TS3 TS4 TS1 : E1 = 1 : HT TS2 : E1 = 0 : LT Fig Example of tariff control Two-rate tariff Three-rate tariff Control inputs E1 only E1 and E2 E E Peak tariff PT Day tariff DT Night tariff NT Operating time PT Operating time DT Operating time NT Tariff arrow PT Tariff arrow DT Tariff arrow NT E1 = 1 : Day tariff E2 = 1 : Peak tariff TS1 TS2 TS3 TS4 TS : Tariff control signal Fig Example of tariff control Three-rate tariff Operating times Every energy register has a registerwhich records its operating time, i.e. how long the energy register or tariff was switched on. From this the power supply company can recognise possible faults or cases of fraud. In addition to the operating times per energy register or per tariff, the meter also records the total operating time in operation (connected to voltage). Siemens Metering Ltd 3-9

32 Construction and function 3-10 Siemens Metering Ltd

33 Control elements and displays 4 Control elements and displays 4.1 Control elements 4.2 Liquid crystal display The meters have no control elements in the normal sense. The only operating function, data acquisition, is made either by reading the display or automatic readout via the optical or CS interface. For readout via the optical interface the reader head is placed in the "Readout" indentation on the plastic viewing window of the meter and readout performed with the manual terminal (refer to chapter 7 "Data readout"). The CS interface, if present, is used for remote scanning of the data via a medium suitable for this purpose (e.g. telephone network with special modem). The meters are provided with a simple liquid crystal display (LCD) Basic layout The basic layout shows all the indication possibilities of the liquid crystal display L1 L2 L Fig. 4.1 Basic layout of liquid crystal display (LCD) 1 Energy direction 2 Register contents 3 Tariff 4 Presence of phase voltages 5 Active tariffs 6 Power indicator 7 Test mode Energy direction The energy direction display always shows the sum of the 3 phases. positive energy direction (taken from power company) negative energy direction (supplied to power company) negative energy direction of individual phases (second arrow flashes) Siemens Metering AG 4-1

34 Control elements and displays If no energy direction indication appears, there is no load applied to the meter. Register contents Tariff Display of contents of relevant energy register with up to 8 digits. Display of tariff or total energy, e.g. double tariff: 1 Energy register 1 (tariff 1) Energy register 2 (tariff 2) Total energy Phase voltages Indication of presence of phase voltages on ZMD120AP as also on ZFD120AP: L1 L2 L3 With reversed phase sequence the characters flash if parametrized in this way. Active tariffs Display of active tariffs. The relevant inscription is situated on the face plate, e.g.: 1 L1 L2 L3 High tariff Low tariff Fig. 4.2 Display of active tariffs Power applied Bar-chart display of power applied with the following ranges: No-load < 30 W > 30 W < 100 W > 100 W < 300 W > 300 W < 1 kw > 1 kw < 3 kw > 3 kw < 10 kw > 10 kw < 30 kw > 30 kw Fig. 4.3 Power indicator Test mode Display of test mode selected (i.e. higher resolution of energy register for meter testing). The arrow is at bottom right of the display (see Fig. 4.1). 4-2 Siemens Metering AG

35 Control elements and displays Operating display The values shown continuously are the operating display. This can be parametrized as fixed display (only one value present, e.g. current tariff) or as scrolling display (several values alternate in a fixed cycle). 1 L1 L2 L3 Energy level tariff 1 (energy register 1) 1 2 L1 L2 L3 Energy level tariff 2 (energy register 2) Total energy 1 2 L1 L2 L3 Fig. 4.4 Example of a scrolling display Error indication The meter can generate an error message on the basis of self-tests. This can be permanently included in the operating display, only in the event of an error or not displayed at all. Fig. 4.5 Example of an error indication Error messages only appear in cases of serious errors in the LCD. The procedure described in chapter 9 "Measures in event of faults" should then be followed, i.e. the meter should be changed. Display check For the display check all segments and symbols of the display appear simultaneously (see Fig. 4.1 "Basic layout of liquid crystal display"). Here too the parametrizing determines whether it appears in the operating display or only in the display on test mode. The display in test mode can be connected by the suitably formatted command (see 8.3 "Input of formatted commands"). Siemens Metering AG 4-3

36 Control elements and displays 4.3 Test diode 4.4 Pulse output r53 The test diode is used for testing the meter. It transmits infrared pulses corresponding to the current measured value. The number of pulses per unit time depends on the meter constant set (according to the inscription on the dial, see also Fig. 3.2) and on the power applied. Digital processing of the signals produces a delay of 1 to 2 seconds between the instantaneous power at the meter and the appearance of the pulses at the test diode. No pulses are lost. Pulse output r53 supplies a train of constant pulses every second, whereby the pulse interval within the train is equal to the pulse length: Example: Pulse frequency 5 imp/s Pulse length = pulse interval 40 ms Pulse train (5 pulses / 4 intervals) 360 ms Spacing from next pulse train 640 ms Pulse frequency : 5 imp/s Pulse length = pulse interval: 40 ms Train with 5 pulses and 4 intervals: 360 ms Spacing from next pulse train: 640 ms Second X X+0.36 X+1 as comparison pulse sequence to test LED: uniform with variable pulse interval (160 ms) Fig. 4.6 Pulse sequence at pulse output r53 (example) As for the test diode, the digital signal processing also produces a delay of 1 to 2 seconds at pulse output r53 between the instantaneous power at the meter and appearance of the pulses. There is also no loss of pulses in this case. 4-4 Siemens Metering AG

37 Parameter setting 5 Parameter setting The meters can be parameterized, i.e. specific parameters can be set with software, so that the meters can be supplied according to the specific wishes of the relevant power company. Retroactive modification of the parameters (re-parameterizing) is also possible. Initial parameterizing and any subsequent re-parameterizing are performed by the manufacturer (or at an authorised service centre) in accordance with the data from the power company. No re-parameterizing is possible in the field. The parameters stored in the meter are protected against unauthorised overwriting. NOTE Certain operating data or meter characteristics can be altered on the spot after installing the meter by means of formatted commands, provided this is permitted by the initial parameterizing (further details are contained in section 8.3 "Input of formatted commands"). 5.1 Values selectable The following values can be selected: Identification number for the power company (energy consumer identification) Identification number for the manufacturer (unit identification) Measured values (+kwh / -kwh) Number of tariffs per measured value / total energy Operating display data / duration of display Readout data / baud rate Significance of cursor symbols Meter constant (number of pulses per kwh) Constant amount pulses (magnitude and length) Display of installation aids Siemens Metering Ltd 5-1

38 Parameter setting 5-2 Siemens Metering Ltd

39 Installation and commissioning 6 Installation and commissioning WARNING Dangers can arise from live electrical installations to which the meters are connected. Touching live parts is dangerous to life. All safety information should therefore be strictly observed without fail. 6.1 Introduction The following personal and technical conditions must be fulfilled for installation and commissioning of the meters: The work described below must only be performed by technically qualified and suitably trained persons. These persons must be familiar with and observe the normal local safety regulations. The details in chapter 2 "Safety", in particular the safety regulations, as well as all information concerning safe operation in this chapter, must be strictly observed. A check should be made before starting work that the material and tools required are all present (as in section 6.2). 6.2 Material and tools required The following material and tools are required for installation of the meters: Correct meter (according to type designation and characteristic data on the dial) with intact meter seal (calibration seals) Correct meter connection diagram (on face plate) Fixing screws for fitting the meters on meter boards or similar device Factory seals Screwdriver suitable for fixing screws WAGO original tool, if necessary size 0 screwdriver for screwless springloaded terminals Screwdriver suitable for thrust screws of phase connections Sealing pliers for company own seals Drilling machine for fixing holes if necessary Phase tester or universal measuring instrument Buzzer Siemens Metering Ltd 6-1

40 Installation and commissioning 6.3 Mounting the meter WARNING The connecting wires at the place of installation must not be live when fitting the meter. Touching live parts is dangerous to life. The corresponding preliminary fuses should therefore be removed and kept in a safe place until work is completed, so that they cannot be replaced by anyone unnoticed. The meter should be mounted as follows on the meter board or similar device provided for this purpose (see also Fig "Meter dimensions"): 1. Find the correct meter position for mounting the meter. 2. Determine the desired form of fixing (open or covered meter mounting). 3. Set the meter suspension eyelet in the relevant position. This can be moved up or down over the stop as illustrated below. open Case edge 180 covered 162 Raise strap slightly and push down over stop Stop Fig. 6.1 Meter suspension eyelet 4. Check with a phase tester or universal measuring instrument whether the connecting wires are live. If so, remove the corresponding preliminary fuses and keep them in a safe place until installation is completed, so that they cannot be replaced by anyone unnoticed. 5. Mark the three fixing points (suspension triangle as in following illustration) on the mounting surface provided: horizontal base of suspension triangle = 150 mm height of suspension triangle for open mounting = 180 mm height of suspension triangle for covered mounting = 162 mm 6-2 Siemens Metering Ltd

41 Installation and commissioning 75 mm 180 or 162 mm respectively 150 mm Fig. 6.2 Drilling plan 6. Drill the three holes for the fixing screws. 7. Unscrew the meter terminal cover. 8. Fit the meter with the three fixing screws on the mounting surface provided. 6.4 Connecting meter WARNING The connecting wires at the place of installation must not be live when fitting the meter. Touching live parts is dangerous to life. The corresponding preliminary fuses should therefore be removed and kept in a safe place until work is completed, so that they cannot be replaced by anyone unnoticed. The electrical connections to the meter should be made as follows according to the connection diagram: 1. Check with a phase tester or universal measuring instrument whether the connecting wires are live. If so, remove the corresponding preliminary fuses and keep them in a safe place until installation is completed, so that they cannot be replaced by anyone unnoticed. Connecting the phase connection lines 2. Shorten the phase connecting wires to the required length and then strip them. 3. Insert the phase connecting wires in the relevant terminals (the terminals are numbered as shown in the connection diagram) and tighten the terminal screws firmly (torque max. 3 Nm). Siemens Metering Ltd 6-3

42 Installation and commissioning With small conductor cross-sections (e.g. 4 mm 2 ) the connecting line must be placed in the indentation (stamping) of the current loops, so that it cannot shift sideways when tightening the terminal screws. Ensure that the connecting line remains in the indentation when tightening. Indentation (stamping) for smaller connection lines Current loop conductor Fig. 6.3 Cross-section through current loop conductor It is recommended to identify the beginning and end of the relevant conductors with a suitable test unit (e.g. buzzer) to ensure that the right consumer is connected to the meter output. (2) U1 (5) U2 (8) U3 (11) N (15)(13)(33) G E1 E2 (20, 21) r53 L1 (1) L1 (3) L2 (4) L2 (6) L3 (7) L3 (9) N (10) N (12) Fig. 6.4 Meter connections NOTE Insufficiently tightened screws at the phase connections can lead to increased power losses at the terminals and therefore to undesirable heating. A contact resistance of 1 mω causes a power loss of 10 W at 100 A! Connecting the signal inputs and outputs 4. Shorten the connecting wires of the signal inputs and outputs to the required length and strip them for approx. 4 mm (wires and strands up to 2.5 mm 2 can be connected). 5. If stranded wire is used, this must be provided with ferrules for connection. 6. Connect the connecting wires of the signal inputs and outputs as follows to the screwless spring-loaded terminals (the terminals are numbered as shown on the connection diagram): Insert a size 1 screwdriver in the upper opening and insert it turning slightly upwards (Fig. 6.5 A). Now place the stripped connecting wire in the lower opening and hold it there securely (Fig. 6.5 B). Withdraw the screwdriver. The connecting wire is then firmly fixed (Fig. 6.5 C). 6-4 Siemens Metering Ltd

43 Installation and commissioning approx. 4 mm A B C Fig. 6.5 Connection in screwless spring-loaded terminals WARNING The insulation of the connecting line must extend as far as the terminal indentation, i.e. there must be no further bare part of the connecting line visible above the terminal edge (as shown in Fig. 6.5 C). Touching live parts is dangerous to life. The stripped part of the connecting wire should be shortened if necessary. If a connecting wire must be disconnected again for any reason, this is performed in the analog sequence (C - A - B). CAUTION Never withdraw connecting wires with the terminal closed, since this could damage the terminal. 6.5 Check of connections NOTE Only a properly connected meter measures correctly! Every connection error results in a financial loss for the power company! Before putting into operation the following points must be checked again and corrected if necessary: 1. Has the correct meter (identification number) been installed at the measuring point of the relevant consumer? 2. Is the calibration connection closed (voltage jumper between phase and voltage circuit) (no contact pin inserted to lift the contact spring)? 3. Are all thrust screws for the phase connections and neutral tightened sufficiently? 4. Are the inputs and outputs for each phase connected correctly? The conductor from the house connection or from the consumer fuse must be present at the input (terminals 1, 4, 7), those of the meter to the consumer at the output (terminals 3, 6, 9). 5. Is the neutral conductor connected to terminals 10 and 12? Interchanging of a phase with the neutral would destroy the meter. Siemens Metering Ltd 6-5

44 Installation and commissioning 6.6 Commissioning and functional check WARNING The preliminary fuses must be replaced to put the meter into operation and for the functional check. While the terminal cover remains unscrewed there is a danger of contact with the connecting terminals. Touching live parts is a danger to life. For any modifications to the installation therefore the preliminary fuses must always be removed again and kept in a safe place until completion of work, so that they cannot be replaced by anyone unnoticed. NOTE If no mains voltage is yet present, commissioning and functional check must be performed later. The installed meter should be put into service and checked as follows: 1. Insert the preliminary fuses removed for installation. The meter is switched on. 2. Check whether the operating display appears correctly (no error message). 3. Check on the display whether all three phases L1, L2 and L3 are indicated and show the phase sequence. If one phase is not present, the relevant symbol is absent. This is also the case if the voltage is less than 25 % Un. With the normal phase sequence L1-L2-L3 the symbols are displayed continuously. If, however, the meter is connected with reversed phase sequence (e.g. L2-L1-L3) the symbols flash. The direction of field rotation (clockwise or anticlockwise) is determined by the parametrization. This has no influence, however, on the measuring behaviour of the meter. 1 L1 L2 L3 Fig. 6.6 Phase sequence indication Caution: Some of the aids described here are not available depending on the version for the specific country. 4. Connect a load and check the power indicator and energy direction display on the meter. 1 L1 L2 L3 Fig. 6.7 Power indicator 6-6 Siemens Metering Ltd