registered or not, are the property of their respective companies. The technical and other data contained in this document is provided for information only. Neither
ALSTOM, its officers or employees accept responsibility for, or should be taken as making any representation or warranty (whether express or implied), as to the
accuracy or completeness of such data or the achievement of any projected performance criteria where these are indicated. ALSTOM reserves the right to revise or
change this data at any time without further notice.
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GRID ALSTOM, its officers or employees accept responsibility for, or should be taken as making any representation or warranty (whether express or implied), as to the accuracy or completeness of such data or the achievement of any projected performance criteria where these are indicated. ALSTOM reserves the right to revise or...
User Manual M2x2/EN M/F iSTAT M2x2 Page 1 SAFETY SECTION This Safety Section should be read before commencing any work on the equipment. Health and Safety The information in the Safety Section of the product documentation is intended to ensure that products are properly installed and handled in order to maintain them in a safe condition.
M2x2/EN M/F User Manual Page 2 iSTAT M2x2 INSTALLING, COMMISSIONING AND SERVICING Equipment connections Personnel undertaking installation, commissioning or servicing work on this equipment should be aware of the correct working procedures to ensure safety. The product documentation should be consulted before installing, commissioning or servicing the equipment.
User Manual M2x2/EN M/F iSTAT M2x2 Page 3 EQUIPMENT OPERATING CONDITIONS The equipment should be operated within the specified electrical and environmental limits. Current transformer circuits Do not open the secondary circuit of a live CT since the high level voltage produced may be lethal to personnel and could damage insulation.
M2x2/EN M/F User Manual Page 4 iSTAT M2x2 TECHNICAL SPECIFICATIONS Protective fuse rating The recommended maximum rating of the external protective fuse for this equipment is 6A, Red Spot type or equivalent, unless otherwise stated in the technical data section of the product documentation.
User Manual M2x2/EN M/F iSTAT M2x2 Page 5 CONTENT SAFETY SECTION Health and Safety Explanation of symbols and labels INSTALLING, COMMISSIONING AND SERVICING EQUIPMENT OPERATING CONDITIONS Current transformer circuits Insulation and dielectric strength testing Opening Enclosure DECOMMISSIONING AND DISPOSAL TECHNICAL SPECIFICATIONS Protective fuse rating INTRODUCTION General...
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M2x2/EN M/F User Manual Page 6 iSTAT M2x2 8.3.1 Voltage 8.3.2 Current 8.3.3 Frequency 8.3.4 Harmonics (THD) 8.3.5 Power 8.3.6 Power factor 8.3.7 Energy 8.3.8 Maximum demands (MDs) 8.3.9 Thermal Average demands HARDWARE Connections Communications Inputs and Outputs 9.3.1 Energy Pulse Outputs 9.3.2 Tariff (inputs) 9.3.3...
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User Manual M2x2/EN M/F iSTAT M2x2 Page 7 TECHNICAL DATA WIRING DIAGRAMS AND CASE DIMENSIONS RELATED DOCUMENTS APPENDIX A: MODBUS PROTOCOL 17.1 Modbus communication protocol 17.2 Register Map for Actual Measurements 17.3 Register table for IEEE 754 Measurements 17.4 Register table for the normalized actual measurements 17.5 100% values calculations for normalized measurements 17.6...
User Manual M2x2/EN M/F iSTAT M2x2 Page 9 INTRODUCTION General The iSTAT M2x2 is an easy to use standard measurement centre family aimed particularly at the medium voltage and industrial market segments throughout the world. The M2x2 measurement centre family integrates a number of measurements and metering functions in the same unit for power system management.
M2x2/EN M/F User Manual Page 10 iSTAT M2x2 High sampling rate of 128 samples per cycle A frequency family of 16 2/3Hz, 45/65Hz or 400Hz Economical Universal Power for all site situations Common case size permits retrofitting without major re-engineering of the panel. Family The iSTAT M2x2 family provides: ...
M2x2/EN M/F User Manual Page 12 iSTAT M2x2 TABLE 7-4 : USER FEATURES M212 M232 Set up Wizard Wrong connection warning 3 Custom screens Demonstration screens Applications The M2x2 family can be used in a wide range of different applications depending on the model, the applications are summarised in TABLE 7-5 below.
User Manual M2x2/EN M/F iSTAT M2x2 Page 13 SYSTEM MODES Connection mode The connection mode of the M2x2 is menu-configurable. The following options are available: 1b - single phase connection, 3b - three-phase, three-wire connection with balanced load, ...
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M2x2/EN M/F User Manual Page 14 iSTAT M2x2 Connection Type TABLE 8-2 : BASIC Parameter Unit MEASUREMENTS Apparent power S × × Apparent power S × × × Apparent power S × × × ...
User Manual M2x2/EN M/F iSTAT M2x2 Page 15 Connection Type TABLE 8-2 : BASIC Parameter Unit MEASUREMENTS MD current I MD current I × MD current I × ...
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M2x2/EN M/F User Manual Page 16 iSTAT M2x2 Q (Cap) Lagging vars to generator Import Q Import Q Expor Impor Quadrant 2 Quadrant 1 Power to generator Power to consumer P (--) P (+) Quadrant 3 Quadrant 4 Export Q Export Q Expor Impor...
User Manual M2x2/EN M/F iSTAT M2x2 Page 17 INSTRUMENTATION Measurements With the increase in harmonics present in today's power systems, due to the increased use of electronic loads such as computers, variable frequency drives, etc. it is important, when accurate monitoring of electrical parameters is required, to use a measuring technique that allows for their presence.
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M2x2/EN M/F User Manual Page 18 iSTAT M2x2 TABLE 9-2 : GLOSSARY Term Explanation Root Mean Square value Type of a memory module that keeps its content in case Flash of power supply failure MODBUS Industrial protocol for data transmission QDSP Software for iSTAT family Alternating voltage...
User Manual M2x2/EN M/F iSTAT M2x2 Page 19 Supported Measurements The measurements that the M2x2 family supports are shown in the following table. TABLE 9-3 : BASIC MEASUREMENTS Voltage U in U Current I in I Active power P , and P Reactive power Q , and Q Apparent power S...
M2x2/EN M/F User Manual Page 20 iSTAT M2x2 8.3.1 Voltage All versions of the M2x2 except for the 3-phase 3-wire versions, measure the true RMS value of the phase voltages (U ) connected to the unit. The three line-to-line voltages ), then the average phase voltage (U) and average line voltage (U ) are ...
User Manual M2x2/EN M/F iSTAT M2x2 Page 21 8.3.7 Energy Four counters are available so that energy in each of the four quadrants can be measured. The configuration of the four counters can be adapted to the customer's needs via the front menu or via the remote communications link.
M2x2/EN M/F User Manual Page 22 iSTAT M2x2 HARDWARE The connections to the M2x2 Measurement Centre are made on the rear as shown in Figure 10-1 FIGURE 10-1 : M232 REAR CASE VIEW Connections Voltage inputs of the M2x2 can be connected directly to a low-voltage network or via a voltage transformer to a high-voltage network.
User Manual M2x2/EN M/F iSTAT M2x2 Page 23 Position Data direction Description MC input pin Data reception (Rx) RS232 − Grounding ( ) MC output pin Data transmission (Tx) To/From MC RS485 − Do not connect! To/From MC To/From MC USB B TABLE 10-1 : RS232, RS485, AND USB CONNECTIONS Inputs and Outputs...
M2x2/EN M/F User Manual Page 24 iSTAT M2x2 Connections TABLE 10-4: TARIFF INPUTS 9.3.3 Alarm outputs The Energy pulse outputs on the M232 can be optionally programmed to output alarm conditions if the pulse outputs are not required. The alarms can be set using QDSP via the remote communications link.
User Manual M2x2/EN M/F iSTAT M2x2 Page 25 USER INTERFACE MENU STRUCTURE 10.1 Menu introduction The settings, measurements and functions of the M2x2 can be accessed from either the front panel or the remote communications link (M232 only). The menu structure of the M2x2 is navigated using the five keys on the front panel as shown in figure 11-1 below: FIGURE 11-1 : M232 FRONT VIEW Throughout this section the following symbols are used in the diagrams to relate to pressing...
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The M2x2 is supplied with the Level 1 password set to AAAA. Level 2 password has not been set. AAAA passwords offer no level of protection; all measurements and settings can be modified. The passwords must be changed from AAAA to activate password level protection. Alstom Grid Figure 11-2a initial power up display M232 Multimeter www.alstom.com/grid...
User Manual M2x2/EN M/F iSTAT M2x2 Page 27 10.2 Measurement Navigation Figure 11-3 illustrates the measurement menu structure. The user can browse through the available menus using the direction keys, by pressing the DOWNor UP keys and then pressing the OK key to make a selection. The LEFT key is pressed to return to the Main Menu Figure 11-3...
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M2x2/EN M/F User Manual Page 28 iSTAT M2x2 table 11-1 illustrates the Present Values Menu information structure. The user can browse through all the available menus using the direction keys. Pressing the OK key returns to the Present Values Menu Information Left Right...
M2x2/EN M/F User Manual iSTAT M2x2 Page 29 10.3 Settings Navigation Figure 11-5 illustrates the settings menu structure. The user can browse through the available menus using the direction keys, by pressing the DOWNor UP keys and then pressing the OK key to make a selection. The LEFT key is pressed to return to the Main Menu Figure 11-5...
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User Manual M2x2/EN M/F iSTAT M2x2 Page 30 table 11-2 illustrates the Settings Menu information structure. The user can browse through all the available menus using the direction keys. When the settings section required is highlighted press OK to access the individual settings. Pressing the LEFT returns to the Settings Menu.
This will not refresh back to the main menu so the user has to press the LEFT key to get back to the Main Menu. Figure 11-7 Alstom Grid Product Identify Initial power up display and Info M232 display Multimeter www.alstom.com/grid...
User Manual M2x2/EN M/F iSTAT M2x2 Page 32 Figure 11-8 Info Product Information Ser.#: MCxxxxxx S.ver: 0.29 H.ver: A Date: 14.08.2009 Run: 0d 14h 47’ Back to main menu <- Main Menu The information shown on the Product Information display is: Ser.#: MCxxxxxx: this is M2x2 serial number.
M2x2/EN M/F User Manual iSTAT M2x2 Page 33 HARDWARE FUNCTIONS 11.1 Installation Wizard The Installation Wizard is designed to take the user through the minimum functions necessary to install the M2x2. By pressing the OK key the following functions can be set: Language: Connection Mode: VT Primary: VT Secondary: CT Primary: CT Secondary: Device Address: Baud Rate: Parity: Stop Bit.
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User Manual M2x2/EN M/F iSTAT M2x2 Page 34 either the DOWN or UP keys until the desired setting is shown, then press OK key to confirm. When the curser is under the decimal point, the decimal point location and engineering units (V, KV) can be changed.
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M2x2/EN M/F User Manual iSTAT M2x2 Page 35 Figure 12-7 CT secondary CT Secondary display _5.0A OK Select Figure 12-8 shows the Device address setting structure. An underscore shows the position of the curser. Move along by using the RIGHT or LEFT key, changes are made by pressing either the DOWN or ...
User Manual M2x2/EN M/F iSTAT M2x2 Page 36 Figure 12-1 shows the Stop Bit setting structure. Changes are made by pressing either the DOWN or UP keys until the desired setting is shown, then press OK key to confirm. The LEFT key can be pressed to return to the Parity setting.
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M2x2/EN M/F User Manual iSTAT M2x2 Page 37 Demo Cycling feature will then show various features of the M2x2, Meter identify Info page Alarm groups and status Voltage, CURRENT, Power and Phase angle values Energy values ...
User Manual M2x2/EN M/F iSTAT M2x2 Page 38 SETTINGS The settings on the M2x2 are completed using the Keypad and Display; on the M232 they can also be done using the QDSP software over the communications link. The Installation Wizard described in section 12.1 is designed to take the user through the minimum functions necessary to install the M2x2.
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M2x2/EN M/F User Manual iSTAT M2x2 Page 39 Figure 12-12 in the Installation Wizard section describes the language selection. Once selected, the language option appears in the lower menu when the cursor highlights the language option. Figure 13-3 illustrates the Temperature Unit setting.
User Manual M2x2/EN M/F iSTAT M2x2 Page 40 12.3 LCD Navigation Figure 13-6 illustrates the LCD menu structure. The user can browse through the available settings using the direction keys, by pressing the DOWNor UP keys and then pressing the OK key to make a selection. The LEFT key is pressed to return to the Settings Menu.
L2 – level 2 password: the user cannot change any of the settings without a password. If the password is lost or forgotten, the user will have to ask Alstom Grid for the factory allocated password. In order to give this the user must tell Alstom Grid the M2x2 serial number of the instrument.
User Manual M2x2/EN M/F iSTAT M2x2 Page 42 12.5 Energy Navigation Figure 13-10 illustrates the Energy menu structure. The user can browse through the available menus using the direction keys, by pressing the DOWNor UP keys and then pressing the OK key to make a selection. The LEFT key is pressed to return to the Setting Menu.
M2x2/EN M/F User Manual iSTAT M2x2 Page 43 12.6 Inputs and Outputs Figure 13-3 illustrates the Settings menu structure. To select the Input/Output options the user presses the DOWNor UP keys and then pressing the OK key to select Inputs and Outputs.
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User Manual M2x2/EN M/F iSTAT M2x2 Page 44 The Energy Counter can be defined as an Alarm Output or as a pulse output for Counter 1 to 4. Therefore any of the 4 Energy counter registers can be assigned to either of the pulse outputs.
M2x2/EN M/F User Manual iSTAT M2x2 Page 45 COMMUNICATIONS 13.1 Communications ports The M232 is fitted with a primary communications (COM1) port which can be RS232, RS485 or USB. The communication parameters of the M232 can be obtained by using the keypad and display or by using the ‘Scan the network’...
User Manual M2x2/EN M/F iSTAT M2x2 Page 46 TECHNICAL DATA INPUTS AND SUPPLY Voltage Input Nominal Voltage (Un) 230 V / 415 V Rating / 230 V 120V / 415V Max Allowed value 277 V , 480 V permanently 2 x Un for 10 seconds Minimum range 2V sinusoidal Burden...
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M2x2/EN M/F User Manual iSTAT M2x2 Page 47 ACCURACY (of range unless specified) RMS Current Class 0.5 , Iavg, I Class 0.5 Maximum Current 12.5A Class 0.5 (of reading) RMS Line Voltage 75V L-N Class 0.5 , Uavg) 250V L-N Class 0.5 500V L-N Class 0.5...
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User Manual M2x2/EN M/F iSTAT M2x2 Page 48 MODULES Energy Pulse (Alarm) module No of outputs Max. switching power 40 VA Max. switching voltage AC 40 V Max. switching voltage DC 35 V Max switching current Insulation 1000V ac between open contacts 4000V ac between coil and contacts Pulse...
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M2x2/EN M/F User Manual iSTAT M2x2 Page 49 SAFETY FEATURES General In compliance with EN61010-1:2002 600Vrms, installation category II 300Vrms, installation category III Pollution degree 2 Test voltage 3.7KV, 1minute In compliance with EN61010-1:2002 Directive on electromagnetic compatibility 2004/108/EC In compliance with EN 61326-1: 1998 Protection In compliance with EN60529:1997 Front: IP52...
M2x2/EN M/F User Manual iSTAT M2x2 Page 55 APPENDIX A: MODBUS PROTOCOL 17.1 Modbus communication protocol Modbus protocol is enabled via the RS232 or RS485 communication port on the M232. Modbus protocol enables operation of the device on Modbus networks. For the M232 the Modbus protocol enables point to point (for example Device to PC) communication via RS232 communication and multi drop communication via RS485 communication.
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User Manual M2x2/EN M/F iSTAT M2x2 Page 56 Parameter Type M233 Compatible M231 Compatible Register map Register map Start Start Total Apparent Power S 30156 30157 30050 30051 Power Factor PF 30166 30167 30060 30061 Power Factor PF 30168 30169 30062 30063 Power Factor PF...
M2x2/EN M/F User Manual iSTAT M2x2 Page 57 Parameter Type M233 Compatible M231 Compatible Register map Register map Start Start MD Current I 30530 30531 Dynamic Demand Values MD Real Power P (positive) 30510 30511 MD Real Power P (negative) 30512 30513 MD Reactive Power Q −...
User Manual M2x2/EN M/F iSTAT M2x2 Page 60 Parameter Type M233 Compatible M231 Compatible Register map Register map Start Start ENERGY Energy Counter 1 T_float 32638 32639 31500 31501 Energy Counter 2 T_float 32640 32641 31502 31503 Energy Counter 3 T_float 32642 32643...
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M2x2/EN M/F User Manual iSTAT M2x2 Page 61 MODBUS Parameter 100% value Register Type Reactive Power Q 30820 Reactive Power Q 30821 Reactive Power Q 30822 Total Reactive Power Q 30823 Apparent Power S 30824 Apparent Power S 30825 Apparent Power S 30826 Total Apparent Power S 30827...
User Manual M2x2/EN M/F iSTAT M2x2 Page 62 MODBUS Parameter 100% value Register Type MD Apparent Power S 30858 MD Current I 30859 MD Current I 30860 MD Current I 30861 Dynamic Demand Values MD Real Power P (positive) 30862 MD Real Power P (negative) 30863 MD Reactive Power Q −...
M2x2/EN M/F User Manual iSTAT M2x2 Page 63 Rxxxxx are Modbus register numbers, see above and section 18.6 for descriptions. It is suggested that these values are read regularly to ensure any changes made in the settings are incorporated in the calculation. As the nominal input ranges of the M2x2 are 500V and 5A, the Used voltage range and Used Current range need to be set correctly to obtain the highest resolution normalized values.
User Manual M2x2/EN M/F iSTAT M2x2 Page 64 17.7 Data types decoding Type Bit mask Description Unsigned Value (16 bit) Example: 12345 = 3039(16) Signed Value (16 bit) Example: -12345 = CFC7(16) Signed Long Value (32 bit) Example: 123456789 = 075B CD 15(16) Short Unsigned float (16 bit) bits # 15…14 Decade Exponent(Unsigned 2 bit)
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M2x2/EN M/F User Manual iSTAT M2x2 Page 65 Type Bit mask Description T_Str4 Text: 4 characters (2 characters for 16 bit register) T_Str6 Text: 6 characters (2 characters for 16 bit register) T_Str8 Text: 8 characters (2 characters for 16 bit register) T_Str16 Text: 16 characters (2 characters for 16 bit register) T_Str40...
User Manual M2x2/EN M/F iSTAT M2x2 Page 66 APPENDIX B: CALCULATIONS & EQUATIONS 18.1 Definitions of symbols Symbol Definition Sample factor Average interval Phase voltage (U or U Phase-to-phase voltage (U or U Total number of samples in a period Sample number (0 ≤...
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M2x2/EN M/F User Manual iSTAT M2x2 Page 67 Neutral current i − n sample of phase current (1, 2 or 3) N = 128 samples in a period (up to 65 Hz) Power Active power by phases N −...
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User Manual M2x2/EN M/F iSTAT M2x2 Page 68 Current THD − value of first harmonic n − number of harmonic Phase voltage THD − value of first harmonic n −...
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