This quick guide is helpful to explain how to use the Smart BM software version 2.16, applicable to communicate with the Bushing Monitor BM-HMI in versions 2.05, 2.06, and 2.07 associated with the Measurement Modules BM-MM in versions 6.07, 6.08, and 6.10.

The Smart BM software allows one to read the online measurements, BM status, and self-diagnosis information, in addition to viewing and modifying configuration parameters. With the Smart BM, it is also possible to download the Mass Memory (log) and data from the internal memory of the measurement modules.

Communicating with BM-HMI

1. Start the program by clicking the shortcut created on the desktop. It will show the initial screen as in the picture below.

   • In the highlighted green area, it is possible to see the online measurements of the BM connected.
   • In the red part are the menus and submenus of configurations, and also some pieces of information. 
   • The parameters for configuring the communication between your computer and the BM are in the blue part. 
   • The black highlighted area shows the active BM self-diagnosis codes, the communication status, the Download button used to download the BM log, and the Download IM button used to download the data from the internal memory of the measurement modules.

2. Connect the BM-HMI to the computer using the RS-485 port (terminals 31 and 32 of the BM-HMI) or RS-232 through an RS-485-USB or RS-232-USB converter. Configure the "Serial Port" parameter on the BM-HMI according to the serial port chosen for communication (Menu → Advanced Settings → Configuration → Serial Port).
   

3. The BM communication protocol must be defined as Modbus to be able to communicate with the software. If the protocol is defined as DNP3, it will be necessary to change this configuration momentarily (Menu → Advanced Settings → Configuration → Protocol).

   ℹ️ For more information on how to check and change parameters on the BM, refer to section 4.9 of the equipment manual.

4. Configure the COM port used by your computer to connect the RS-485-USB or RS-232-USB converter. Access Windows Control Panel → Hardware and Sound → Device Manager in the device menu check for Ports (COM and LPT). Right-click on the converter name and then click on Properties. 

   

5. On the next screen, click on the "Port Settings" tab, and the "Bits per second" option, configure the connection baud rate according to the BM-HMI settings (Menu → Advanced Settings → Configuration → Baud Rate). Then click on the Advanced button. 

   
   

   

6. On the next screen select the desired COM port number and click OK.

   
   

7. Configure the parameters for communication in the software:

   • Timeout(ms) - Amount of time in milliseconds that Smart BM will wait for a response from BM-HMI before starting a new attempt. Keep the default value, except for special applications.

   • Try - Number of attempts to communicate with the BM-HMI before the Smart BM displays a communication error message. Keep the default value, except for special applications.

   • Baud Rate - Same value configured on the BM-HMI (Menu → Advanced Settings → Configuration → Baud Rate).

   • COM Port - COM port number configured in the previous item.

   • Address - BM-HMI address on the network (Menu → Advanced Settings → Configuration → Address).
     

8. Click the Connect button to connect with the BM-HMI. If the connection succeeds, the "Communication" field will display the message "OK" and a green light. The "Online Measurements" field will show the online monitoring values. If there is any active self-diagnostic, the equipment will display some codes in the "BM Self-Diagnostic" field. 
   
   

Communication with BM-MM

1. Start the program and connect the BM-MM to the machine via the RS-485 port (terminals 4 and 5) using an RS-485-USB converter.
2. Configure the COM port used by your computer to connect the RS-485-USB or RS-232-USB converter. Access Windows Control Panel → Hardware and Sound → Device Manager. In the device menu, look for Ports (COM and LPT). Right-click and then Properties
   

3. On the next screen, click on the "Port Settings" tab and the "Bits per second" option, and set the connection baud rate to 9600. Then click the Advanced button.

4. On the next screen select the desired COM port number and click OK.
   

5. Configure the parameters in the software for communication:

   • Timeout(ms) - Amount of time in milliseconds that Smart BM will wait for a response from BM-HMI before starting a new attempt. Keep the default value, except for special applications.

   • Try - Number of attempts to communicate with the BM-HMI before the Smart BM displays a communication error message. Keep the default value, except for special applications.

   • Baud Rate - Same value configured on the BM-HMI (Menu → Advanced Settings → Configuration → Baud Rate).

   • COM Port - COM port number configured in the previous item.

   • Address - BM-HMI address on the network (Menu → Advanced Settings → Configuration → Address).
     

6. Click the Connect button to connect with the BM-MM. In this case, the values shown on the initial screen have no meaning, but still possible to download the log and the data from the internal memory of the BM-MM.
   

On-line Measurements

After establishing a connection between the BM-HMI and the Smart BM, it is possible to view the IED's online measurements. This screen will show the initial and actual values of capacitance and tan delta, the alarm time of both topics, and the alarm indication of low leakage current from each connected measuring module. Will be showing the status of each BM-MM at the bottom of the corresponding "Bushing Set" field.

If any phase shows a low leakage current, the respective light will flash red, signaling the problem. When alarm events are on the way due to the capacitance and tan delta values, the respective fields will flash to signal the difficulty, where:

• In case of an alarm indicating a "high" value for capacitance or tan delta, the light will be orange;

• In case of an alarm indicating a "very high" value for capacitance or tan delta, the light will be red;

You can view other measurements by clicking on Other Measurements. This screen will show the temperature measures of sensors A and B, the phase-to-ground voltages of each BM-MM, the leakage currents per phase, the sum of leakage currents, the angle of the sum current, leakage current angles of phases B and C, line voltages and the phase configuration of each module (ABC, RBC, ARC or ABR).

Self-diagnostic

The "BM Self-Diagnostic" field on the left side of the screen continuously informs if the BM is operating normally. In this case, it displays an "OK" message or if there is an active self-diagnosis condition.

When there is an active self-diagnosis, this field shows the self-diagnosis codes of the BM, like the image below. The errors shown for the measurement modules correspond to "grouping 1". In this example, MM 2 has the self-diagnosis code 0400, which corresponds to Reference voltage out of limits.

For more details on self-diagnostic, click on self-diagnostic in the menu located in the upper left corner of the screen. On the new screen, the self-diagnosis codes, of each measurement module (fields “Detailed 1” and “Detailed 2”), will be presented in detail, as well as the diagnostic memory of the BM-HMI and the measurement modules, as shown below.

Changing screen texts

The user can edit the texts of identification of the measurement modules and phases on the online measurement screen. To edit a text, double-click the left mouse button on the text, and a new window will open, allowing the edition. Enter the new text you want and click the OK button. The new text will be displayed and saved permanently. 

Configuration and parameterization

With the Smart BM, it is possible to view and change the configuration and parameterization of the BM through the configuration submenus.

Language

By the Language submenu, it is possible to change the display language of the BM. Double-click on "Language" in the menu located in the upper left corner of the screen and select the desired language on the pop-up window that will be displayed, then click on the Save button.

Date and time

To change the date and time of the internal clock of the BM, double-click on the "Date/Time" menu located in the upper left corner of the screen. In the pop-up configure the date and time and click the Save button. 

Measurement module definitions

To change the number of measurement modules and initial capacitance and tan delta settings, use the "Measurement Module" submenu. Set the number of measurement modules in "Number of Bushing Sets" and select the measurement module in "Bushing Set" the value of this field corresponds to the address configured in the BM-MM. In the "Phase" field, select the desired bushing phase (A, B, C, R, or All). Define the initial capacitance and tan delta values in the "Capacitance" and "Tangent Delta" fields and click "Save" to store the settings.

Alarms

To change the alarm settings, click on the "Alarms" submenu. In the pop-up window that will be displayed, choose the measurement module and the phase in Bushing Set and Phase, respectively.

In Alarms Adjustment Mode, choose the alarm configuration method for capacitance and the tan delta between manual and automatic. If you select the manual mode, the settings will give absolute values. If the automatic mode is selected, the settings will be in percentage change from the initial value. Adjust the high and very high capacitance and tan delta alarm values, as well as the time for the trend alarm. Then click on the Save button on the left side of the screen.

Then, select the mode for setting the leakage current alarms in Leakage Adjustment Mode. If you choose the manual method, the settings will be in absolute values. If the automatic mode is selected, the settings will be in the percentage of variation to the reference. Adjust the alarm and time values for high and very high leakage current alarms. Then click on the Save button on the right side of the screen. 

Relay

The BM-HMI has seven configurable relays for signaling alarms and a non-configurable relay for self-diagnostic signaling (NC). Through the software Smart BM, it is possible to configure each of the seven relays. Access the "Relays" submenu with a double click. In the "Relay Configuration" window, choose the relay to configure in the "Relay" field. Then, select the measurement module(s) and the phase(s) by checking the checkboxes in Bushing Set and Phase, respectively, and the alarms that will activate the selected relay. Finally, select the operating mode of the relay between normally open (NO) and normally closed (NC) and click the Save button to save the settings. To configure the other relays, repeat the procedure.

When an alarm of high or very high leakage current is startled, in any phase of BM-MM 1, the relay will close the contact if the operation mode is configured as normally open.

Advanced configurations

Double-click the "Advanced" submenu to access the advanced settings. In the "Advanced Configuration" window, you can change the following configuration:

• RTD Configuration - selection of the temperature sensors connected to the BM-HMI where the options are: both OFF, RTD A ON, RTD B ON, or both ON;
• Screen Roll - selection of the screen display mode. If the "OFF" option is selected, the last screen displayed will remain on the screen, and if the "ON" option is selected, all the indication screens will be displayed cyclically, with an interval of approximately 15 seconds between each screen;
• Relay Hysteresis - the percentage of the hysteresis for relay deactivation concerning the programmed alarm value;
• LOG Interval - time interval for recording the measurements in mass memory;
• Trend Time Constant - time constant used to calculate capacitance and tan delta evolution trend;
• Low Leakage Current Alarm Set 1 / 2 / 3 - minimum leakage current value for each measurement module, below which there will be an alarm for low leakage current;
• Analog Output Range - current range to use by the outputs in the current loop for remote indication;
• Sampling Set 1 / 2 / 3 - allows starting (Running) or stopping (Stopped) the sampling of the measuring modules 1, 2, and 3;
• Bushing Exchange Set 1 / 2 / 3 - it allows selecting the three bushings that are in operation between phases A, B, C, and R (spare transformer) for each measuring module;
• Minimum Tangent Delta Alarm - minimum value for the high tan delta alarm when the automatic mode uses for alarm calculations;
• Maximum Tangent Delta Alarm - minimum value for very high tan delta alarm when automatic mode uses for alarm calculations;

In addition, on the Analog Outputs board, it is possible to configure the two current loop outputs. Select the output in Analog Output. Choose the measurement module(s) and the phase(s) by checking the boxes under Bushing Set and Phase, respectively. Under Analog Variable, choose the variable associated with the analog output, which can be capacitance or tan delta. Set the beginning and end of the scale in Initial Value and Final Value, respectively, and click the button Save. To configure the other analog output, repeat this procedure.

When more than one measuring module or phase is selected for the same analog output, the output value will be the highest among them. In the case of the image above, the value on analog output one will be the highest capacitance value between phases A, B, and C of BM-MM 1 at each instant.

On this submenu, it is possible to recalculate the reference of each MM using the "Recalculate Reference Set 1 / 2 / 3" buttons and the reset mass memory using the Reset LOG button.

Firmware version and serial number

To check the firmware version and serial number of BM-HMI and the measurement modules, access the "Information" menu.

If you have any problems or difficulties with the procedure, please do not hesitate to contact us!

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E-mail: sac@treetech.com.br
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