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CVM-BDM supply network analyzer

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12.- CVM-BDM... COMMUNICATIONS

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One or some CVM-BDM... can be connected to a P.C.. With this system we

can get all the parameters in one central point of reading. The CVM-BDM..., has a
serial RS-485 type output. If we connect more than one device to the same
communication line, we have to assign to each of them a different code or direction
(from 01 to 255), since the P.C. needs the identification of every measuring point

12.1.- ! To take into account:

- PROTOCOL:

MODBUS © (

Question / Answer)

- CVM-BDM DEFAULT CONFIGURATION :

001 / 9.600 / 8 bits / N / 1 bit

- Available baud rates: 1.200 - 2.400 - 4.800 - 9.600 - 19.200 bauds

- RS-485 type output:

−

RS-485 connection will be carried out by means of a

twisted and

screened cable,

with a minimum of 3 wires, with a maximum

distance between the CVM-BDM and the last peripheral of 1.200 m.
The CVM-BDM uses a RS-485 communication bus allowing up to

a

maximum of 32 devices in parallel (Multi-point bus)

per port

used in the PC

.

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Summary of Contents for CVM-BDM

Page 1: ...SUPPLY NETWORK ANALYZER CVM BDM SERIES INSTRUCTION MANUAL M98153001 03 06C c CIRCUTOR S A ...

Page 2: ... to Phase or Phase to Neutral voltages 18 5 2 Voltage transformation ratio 19 5 2 1 Voltage Transformer Primary 19 5 2 2 Voltage Transformer Secondary 20 5 3 Current Transformer Primary 20 5 4 Network specifications 21 5 4 1 Rated voltage 21 5 4 2 Rated frequency 21 5 5 Integration period of voltage and frequency signals 22 5 6 Parameter SETUP 23 5 7 First Page SETUP 25 5 8 Maximum power demand 26...

Page 3: ...CATIONS 45 12 1 To take into account 45 12 2 RS 485 type connection to a RS 232 type input of a PC 46 12 3 MODBUS protocol 47 13 APPENDIX 53 13 1 Appendix A Four quadrant measuring method in the CVM BDM 53 13 2 Appendix B Second SETUP of the CVM BDM 54 13 3 Appendix C Internal memory reading and setting procedures 56 13 3 1 Description 56 13 3 2 Internal memory setting for data collection purposes...

Page 4: ...software Power Vision 1 2 Connection procedures The manual you hold in your hands contains information and warnings about the CVM BDM that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions Before connecting the instrument to the mains verify the following a Power supply 230 V a c Power supply Va c Single phase 50 60 Hz b...

Page 5: ...trical parameters of the monitored power system Before power supplying the instrument read the CONNECTIONS and SETUP sections and choose the most suitable operation mode for getting your desired data The CVM BDM is an instrument which measures calculates displays and memorizes all the main electrical parameters at any electrical network balanced or not The measuring is true RMS value through three...

Page 6: ...th xx xx xx Individual harmonic voltage content Up to the 15th xx xx xx Flicker x x x Available x Display and communications xx Communications Parameter CVM BDM Date Time dd mm yy hh mm ss TIME Active energy two indep meters demanded energy and generated energy kWh and Reactive energy inductive two indep meters kvarh L and Reactive energy capacitive two indep meters kvarh C and CVM BDM permits abo...

Page 7: ...ection of main parameters from the electric network By means of the PC see the user can select the parameters to be save into memory among all measured by the power meter instantaneous maximum and minimum values You can also set the data recording period 2 1 Other features DIN rail mounting device with low dimensions True RMS value measurements Internal memory 1Mbyte Measurements in all four quadr...

Page 8: ...ION AND STARTUP The manual you hold in your hands contains information and warnings that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions The instrument must not be powered and used until its definitive assembly on the cabinet s door Whether the instrument is not used as manufacturer s specifications the protection of t...

Page 9: ... 28 Instrument burden 6 VA b Maximum voltage at the voltage measuring circuit Standard 500 V a c phase neutral 866 V c a between phases A special model CVM BDM for 110 V measurement is also available 100 V a c phase neutral 173 V a c between phases c Maximum admissible current Transformer of In 5 A a c d Operation conditions Operating temperature 0 to 50ºC Humidity 25 to 80 R H not condensing e Sa...

Page 10: ...nt must not be used until this is completely installed The instrument must be connected to a power supply circuit protected with gl type IEC 269 or M type fuses rated between 0 5 and 2 A This circuit should be provided with a circuit breaker or any equivalent element to connect or disconnect the instrument from the power supply network The supply and measuring voltage circuits will be both connect...

Page 11: ... Termination resistor RT 240 Ω resistor adaptation of the line final impedance bridge 23 22 and 19 20 22 21 20 GND COM1 CVM B RS 485 connection to the PC 22 1 21 GND 5 converter 20 2 RS 485 RS 232 16 17 18 No used No used No used 15 N NEUTRAL 14 VL3 Voltage phase 3 13 VL2 Voltage phase 2 12 VL1 Voltage phase 1 11 10 I L3 s1 s2 Current phase L3 5 A 9 8 I L2 s1 s2 Current phase L2 5 A 7 6 I L1 s1 s2...

Page 12: ... CVM BDM supply network analyzer Page Nº 11 3 3 Connection drawing for the CVM BDM a CVM BDM Three phase network 4 wires low voltage S2 P2 S1 P1 S2 P2 S1 P1 S2 P2 S1 P1 A2 A1 N L1 L2 L3 N CVM BDM 1 28 ...

Page 13: ...supply network analyzer Page Nº 12 b CVM BDM 3 current transformers 2 voltage transformer A2 A1 S2 P2 L1 L2 L3 POWER SUPPLY CVM BDM S1 P1 S2 P2 S1 P1 S2 P2 S1 P1 1 6 7 8 9 10 11 12 13 14 S1 P1 S2 P2 S1 P1 S2 P2 ...

Page 14: ...lyzer Page Nº 13 c CVM BDM 2 current transformers 2 voltage transformer S2 of the current transformer grounded to earth A2 A1 S2 P2 L1 L2 L3 POWER SUPPLY CVM BDM S1 P1 S1 P1 S2 P2 S1 P1 S2 P2 S2 P2 S1 P1 1 6 7 8 9 10 11 12 13 14 ...

Page 15: ... CVM BDM supply network analyzer Page Nº 14 S1 of the current transformer grounded to earth A2 A1 S2 P2 L1 L2 L3 POWER SUPPLY CVM BDM S1 P1 S1 P1 S2 P2 S1 P1 S2 P2 S2 P2 S1 P1 1 6 7 8 9 10 11 12 13 14 ...

Page 16: ...y shows the voltage of phase L1 V1 the voltage of phase L2 V2 and the voltage of phase L3 V3 220 V1 220 V2 220 V3 If you press the display key we are now reading the CURRENT values for each phase A1 A2 A3 However this screen can be configured in order to display other different parameters When pressing again the display key we will see on display the three previously programmed parameters If you p...

Page 17: ...ters being shown appear in the displays xxxx MIN xxxx MIN xxxx MIN This function is only valid while you keep pressing the min key If you stop pressing the key the instantaneous values appear again Reset Pressing the reset key the system is reset This is equivalent to switch off the power supply of the instrument The stored maximum and minimum values will be automatically deleted from the internal...

Page 18: ... unlocked when the SETUP is accessed configuration parameters can be either visualized and modified 2 Setup LOC SETUP locked when the SETUP is accessed configuration parameters can be visualized but cannot be modified Once into the SETUP use the keyboard to select different options and enter required variables The key Display validates de value and pass to the next menu The key MAX permits to sele...

Page 19: ...es of the phases L1 L2 L3 U1 U12 U2 or U23 U3 U31 Phase to Neutral Voltages U1 U2 U3 Phase to Phase Voltages U12 U23 U31 a To select one of the voltage options just press the green key max and both options will appear alternately b b When you get in the display the wished option just press the display key to validate it and access to the next setup option ...

Page 20: ... lit on a To write or modify the value just repeatedly press the max key and the blinking digit value will be increased b When the value on screen is the proper one we can pass to the next digit by pressing the min key in order to modify the other values c When the blinking digit is the last one pressing the min key we go back to the initial value set values can be again modified d Press display t...

Page 21: ...t Transformer Primary SET A P and five digits appear on screen allowing us to set the primary of the current transformer The current green leds light on to avoid mistakes SET A P The procedure is the same one done at the previous sections with the max min and display keys NOTES The secondary of the current transformers is not programmable It is automatically set at 5 A 5 A ac The primary current v...

Page 22: ...sformers then the rated voltage of the transformer secondary must be set Phase to neutral voltage S E T n Proceed as for previous sections when using max min display keys Examples Direct measurement Transforming ratio 1 1 Set n 230 Through transformers 22000 110 Set n 110 5 4 2 Rated frequency The screens shows SET freq and two digits to set the rated frequency of the monitored power system S E T ...

Page 23: ...ble value from 1 to 60 s Proceed similarly than for previous sections by means of the max min and display keys For the calculation of the average maximum and minimum voltage and frequency values the CVM BDM obtains one value every second These values equal the average of the values calculated within the time window set by the user time constant If the time value is 1 second then the viewed value e...

Page 24: ...e next option b If you select NO it allows programming the parameters that you want to see on the display Every new page it asks if you want to continue this setup SET PAGE NUMBER YES xx page No If you select SET PAGE YES you can program the desired parameters in this page xx A1 xx A2 xx A3 Parameter code setup Parameter symbol Setup max key Allows us modifying the value of the blinking digit Each...

Page 25: ...L III 22 Ph Ph voltage L2 L3 V 23 28 Three ph capacitive power kvarC III 23 Ph Ph voltage L3 L1 V 31 29 Three ph power factor PF III 24 Three ph Ph Ph voltage Vc III 30 Date TIME dd mm yy hh mm ss TIME 31 Active energy kW h 32 Reactive energy inductive kvarh L 33 Reactive energy capacitive kvarh C 34 Demand power kW kVA AIII Pd 35 Active energy generated kW h 36 Reactive energy inductive gen kvarh...

Page 26: ... allows selecting among fixed or rotary page a Fixed page the page is changed pressing the display key The page among the available ones that we want to see when the CVM BDM is supplied or a reset is made can be selected b Rotary pages the page changes to the next one automatically every 5 seconds SET AUTO PAGE Rotate page select option Setup The max key allows modifying the selected page The disp...

Page 27: ...rent available options min key allows the validation of the blinking digit and go forward to the next digit only for the SET Per xx option To pass to the next option press display If you don t want to modify anything just press the display key three times without modifying any value Display If you program the MAXIMUM POWER DEMAND option parameter 35 the following appears by display depending on th...

Page 28: ...UR hh mm For their setup max key Allows modifying the value of the blinking digit min key Allows the validation of the blinking digits and go to the next one To pass to the next option press display If you don t want to modify the time just press three times display without making any modification Display If you select the parameter 31 following appears by display display HOUR MINUTES max DAY MONT...

Page 29: ...fications that we have done are saved into memory and the setup process is finished Display If any of the energies is programmed kWh kvarhL or kvarhC it is displayed as follows display XXXX kW h 4 meter digits more significant units max XXX XXX XXX complete meter min XXXX 1 4 digits Tariff type 1 2 or 3 Example If the accumulated energy is 32 534 810 kWh it will be displayed as follows display 253...

Page 30: ...ncreased Press the min key to pass to the next digit in order to modify the other values Press display to access other options To ends the analyzer configuration the user is inquired whether the internal memory of the analyzer is desired to be deleted Clr Data no yes Memory clear Use the max key to select the memory data to be deleted yes or kept no Use the display key to validate the selected opt...

Page 31: ... the fundamental value Thd total value of the harmonic distortion referred to the RMS value The selected option will be the one shown on screen a To select any option just press max to switch between the two available options b Press Display to validate the choice Since all setup options have been completed the setup is exited all modifications are saved into memory and the running mode automatica...

Page 32: ...energy consumed for generating a pulse 0 5 sec long kW h 1 pulse or kvar h 1 pulse B ALARM conditions the parameter to be controlled the maximum value the minimum value and the delay are programmed for each relay output On the CVM BDM C2 CVM BDM C420 screen following messages appear at this SETUP point OUT 1 RELAY 1 CODE 00 Parameter No 1 Depending on the selected variable we will pass to a or b s...

Page 33: ...ating the blinking value and go to the next digit NOTE When you arrive at the last digit you can move the position of the decimal point with the max key Example for setting a 500 W 1 pulse Firstly we enter the value 0500 and following we place the decimal point at the right position with the max key Î 0 500 kW For passing to the next option press display setup options for the second relay will app...

Page 34: ...d by the CVM BDM once the parameter has been selected for the setup of each option proceed as in the Section a b 1 Programming the maximum value to be controlled OUT 1 RELAY 1 AL hI 0 000 Maximum value b 2 Programming the minimum value to be controlled OUT 1 RELAY 1 AL LO 0 000 Minimum value b 3 Delay setup OUT 1 RELAY 1 SEC Delay in seconds 0 000 maximum 9999 sec Press display to pass to the next...

Page 35: ...s of MAXIMUM and MINIMUM MIN MAX max min ON OFF ON Ì 0 Min Max MIN MAX max min OFF ON OFF Ì 0 Max Min MIN MAX ON OFF ON Ì Min 0 Max MIN MAX OFF ON OFF Ì Max 0 Min MIN MAX max min ON OFF ON Ì Min Max 0 MIN MAX max min OFF ON OFF Ì Max Min 0 ON alarm activated relay closed OFF alarm deactivated relay open ...

Page 36: ...ut decimals V xxxx With decimals kV xxx x 0220 220 V 25 30 25 30 kV Current A 0150 150 A Powers kW kvar kVA 0 540 540 W 250 5 250 5 kW Energies kW h kvar h Power factor x xx 0 7 0 70 Frequency xx x 50 0 50 Hz 2 Connections of the RELAY OUTPUTS a CVM BDM C2 2 relays Out1 Terminals Signal Out2 Terminals Signal RELAY1 27 26 N O RELAY2 25 24 N O b CVM BDM C420 1relay Out2 Terminals Signal RELAY1 25 24...

Page 37: ...ility of setting the scale offset and full scale On the CVM BDM screen following messages appear at this SETUP point provided the right module is connected to the equipment a Parameter choosing dA 1 OUTPUT D A No 1 Code Xx Parameter No max min keys allow the selection of any parameter from 01 to 30 display key validates the selected option and passes to the next setup screen b Election of 0 20 mA ...

Page 38: ... go to the next digit NOTE When you arrive at the last digit you can move the position of the decimal point with the max key display to validate the selected option and pass to the next setup screen d Full scale Value of the parameter to which we assign the 20 mA dA 1 OUTPUT D A No 1 F ESC Full scale x xxx allows choosing the full scale 20 mA four digits with floating decimal point Proceed as in t...

Page 39: ...nnel 27 20 mA Common Channel 25 20 mA Common 1 26 20 mA 2 24 20 mA 2 Output calculation 20 Re Offset scale F Zero solution Offset f scale defined by the user Zero 0 mA or 4 mA Zero Offset Mesure solution mA Re mV mA x ohms mV 100 ohms mA x 100 Maximum load is of 250 Ω 5 V 20 mA The maximum allowed offset is a value equal to the 90 of the full scale Output of the power factor parameter PF 0 4 mA 20...

Page 40: ...e CVM BDM executes the integration of all measured values calculates the average maximum and minimum value of the defined period and collects data into memory according to the set recording period the available period can be set from 1 s to 240 min 4 hours Following files are saved into memory Extension Register size DATA saved into the file xx STD variable Only saves into memory the selected para...

Page 41: ...size of each register will depend on the number of parameters selected by the user to be stored The number of registers that can be saved into the memory can be calculated just applying the following formula 4 6 1000000 Parameters No registers of No 6 4 Setting the memory up from PC The choice of parameters to be stored by the CVM BDM must be carried out through a PC by means of the Power Vision s...

Page 42: ...M BDM supply network analyzer Page Nº 41 7 CONTRAST For a correct visualization of the display you can set the display s contrast by pressing the buttons DISPLAY Máx to increase and DISPLAY Min to decrease ...

Page 43: ...e 0 5 of readout 2 digits Current 0 5 of readout 2 digits Powers 1 of readout 2 digits Test conditions Errors due to C T s not included and direct voltage Temperature between 5 ºC and 45 ºC Power factor between 0 5 and 1 Measured values between 5 100 Constructive characteristics Box type Self extinguishing plastic casing Connection Metallic terminals with posidraft screws Fixing Fitted onto symmet...

Page 44: ...ibed at the previous chapters named INSTALLATION AND STARTUP INSTALLATION MODES and SPECIFICATIONS Note that with the instrument powered on the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts This instrument is factory shipped at proper operation condition ...

Page 45: ...operation is carried out the instrument must be disconnected from any power supply source When any protection failure is suspected to exist the instrument must be immediately put out of service The instrument s design allow a quick replacement in case of any failure 11 TECHNICAL SERVICE For any inquiry about the instrument performance or whether any failure happens contact to CIRCUTOR s technical ...

Page 46: ...to 255 since the P C needs the identification of every measuring point 12 1 To take into account PROTOCOL MODBUS Question Answer CVM BDM DEFAULT CONFIGURATION 001 9 600 8 bits N 1 bit Available baud rates 1 200 2 400 4 800 9 600 19 200 bauds RS 485 type output RS 485 connection will be carried out by means of a twisted and screened cable with a minimum of 3 wires with a maximum distance between th...

Page 47: ... to a RS 232 type input of a PC A1 A2 5 1 2 21 20 22 5 1 2 7 5 2 3 5 7 3 2 RS 485 RS 232 CONVERTIDOR DB 9 RS 232 RS 485 CVM BDM PC If the RS485 232 converter with RTS control ability code 770208 is used then the pin 7 connection in the 232 side is not necessary to be done ...

Page 48: ...ers The format for each byte in RTU mode is Code 8 bits binary hexadecimal 0 9 A F Two hexadecimal characters contained in each 8 bits field of the message Bits per Byte 8 data bits Error Check Field Cyclical Redundancy Check CRC MODBUS FUNCTIONS FUNCTION 01 Reading of relay state FUNCTION 3 or 4 Reading of n Words 16 bits 2 bytes This function permits to read all the electrical parameters of the ...

Page 49: ... 10 11 110 111 210 211 Inductive power kvarL 2 var L 12 13 112 113 212 213 Capacitive power kvarC 2 var C 14 15 114 115 214 215 Power factor PF2 PF x 100 16 17 116 117 216 217 Phase voltage V 3 V x 10 18 19 118 119 218 219 Current A 3 mA 1A 1B 11A 11B 21A 21B Active power kW3 W 1C 1D 11C 11D 21C 21D Inductive power kvarL 3 var L 1E 1F 11E 11F 21E 21F Capacitive power kvarC 3 var C 20 21 120 121 22...

Page 50: ...Minutes seconds 23C 23D Active energy kW h W h 3E 3F Inductive reactive energy kvar h L var h L 40 41 Capacitive reactive energy kvar h C var h C 42 43 Maximum power demand Md Pd 44 45 144 145 244 245 Active energy kW h W h 46 47 Inductive reactive energy kvar h L var h L 48 49 Capacitive reactive energy kvar h C var h C 4A 4B Neutral current IN 68 69 168 169 268 269 THD V 1 x 10 6A 6B 16A 16B 26A...

Page 51: ...10 324 325 342 343 360 361 37E 37F 39C 39D 3BA 3BB Harmonic 4 x10 326 327 344 345 362 363 380 381 39E 39F 3BC 3BD Harmonic 5 x10 328 329 346 347 364 365 382 383 3A0 3A1 3BE 3BF Harmonic 6 x10 32A 32B 348 349 366 367 384 385 3A2 3A3 3C0 3C1 Harmonic 7 x10 32C 32D 34A 34B 368 369 386 387 3A4 3A5 3C2 3C3 Harmonic 8 x10 32E 32F 34C 34D 36A 36B 388 389 3A6 3A7 3C4 3C5 Harmonic 9 x10 330 331 34E 34F 36C...

Page 52: ...00 00 00 00 00 00 00 00 00 00 00 60 00 00 01 F4 00 00 0F A0 B7 8B 0A CVM BD number 10 in decimal 03 Reading function 03 or 04 20 Data response bytes 00 00 00 D4 Vav III register 26 Hex in decimal 212 V 00 00 23 28 mA av III in decimal 9000 mA 00 00 0F A0 W III in decimal 4000 W 00 00 00 00 varL III in decimal 0 varL 00 00 00 00 varC III in decimal 0 varC 00 00 00 60 PF in decimal 96 PF 00 00 01 F4...

Page 53: ...F c Writing relay parameters Function 05 PARAMETER FUNCTION COMMAND Force to OFF NP0500000000 CRC Relay 1 output Force to ON NP050000FF00 CRC Force to OFF NP0500010000 CRC Relay 1 output Force to ON NP050001FF00 CRC FUNCTION COMMAND Power meter reset NP0507D0FF00 CRC Energy value deleting NP050834FF00 CRC Power demand deleting NP050835FF00 CRC Maximum and minimum value deleting NP050836FF00 CRC En...

Page 54: ... APPENDIX 13 1 Appendix A Four quadrant measuring method in the CVM BDM Example of the phase difference between voltage and current Active power kW or kW h Reactive power kvar or kvar h P F 30º kW kvar L 300º kW kvar C 210º kW kvar L 120º kW kvar C ...

Page 55: ...wer the CVM BDM on Following messages will be then shown on display a COMMUNICATION PROTOCOL MODBUS SET PROT Protocol BUS MODBUS c BUS protocol display key to validate the choice and pass to the next setup screen b Setting communication parameters SET Cdef default configuration NO max key to switch from NO YES If YES is chosen the configuration is set at 001 9600 8 bits N 1 bit If NO is chosen the...

Page 56: ...lized but cannot be modified To modify the previously set option a 4 digit password is required to be entered in case that this password is not correct this blinks and the previous menu is again accessed CVM BDM PASSWORD 1234 To exit this setup mode the key RESET can be pressed at any moment WARNING if the setup is exited by pressing the key RESET some latest modifications might not be saved into ...

Page 57: ...pply on off Parameters to be recorded by the CVM BDM into the STD file are user programmable thus the memory autonomy will depend both on the number of parameters to be saved up to a maximum of 130 parameters and the recording period The below table shows the method to calculate the memory autonomy according to the number of parameters selected to be saved File type Maximum size Register size Regi...

Page 58: ...n period for data recording into memory of all user selected parameters 1 240 minutes Values will be saved at the end of the recording period together with the time date of the period beginning moment 13 3 2 2 Parameters to be saved into memory The memory autonomy greatly depends on the number of parameters selected to be saved up to a maximum of 130 parameters By means of the Power Vision softwar...

Page 59: ...ory according the user defined recording period If the trigger conditions are simultaneously met at any moment within the selected recording period then average values over all the period will be saved into memory LEVEL TRIGGER Setting of a parameter to be used as a trigger condition as well as its maximum and minimum range limiting values Parameter Choice of the parameter to be used as the trigge...

Page 60: ...ording process Start Starting date for the recording process into the STD file End Ending date for the recording process into the STD file Note If only START END times are set two dates set to zero then the defined recording period will be daily repeated All required information about the Software operation can be found in the CD ...

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