Integrity, Reliability, Conduct, Sustainability. Basler products are found in a variery of industrial applications where the availability of power is always mission critical. Refineries, telecommunications towers, factories, or any other industrial application, Basler products are the solution for the control and management of electric power. Whether it is a ship, oil drilling platform, or other marine applications, Basler products are the solution for the control and management of electric power. Since , Basler products have been the trusted solution in power plants, hydro dams, agricultural facilities, refineries, airports and many other applications where power is generated.

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Quick Links. Download this manual. Table of Contents. When the unit is configured in a system with other devices, it is recommended to use a separate lead to the ground bus from each unit. It is loaned for confidential use, subject to return on request, and with the mutual understanding that it will not be used in any manner detrimental to the interest of Basler Electric.

Revisions are listed in reverse chronological order. Page 6 Section 7 Maintenance and Troubleshooting Page 7: Table Of Contents Figure Page 9: Specifications A.. No var or power factor control Voltage matching Page Environment mm x 79 mm x mm Page 12 Table Figure shows the front panel indicators for the DECS Table describes the function of each front panel indicator. Figure A detailed description of each function block is provided in the paragraphs under the heading of DECS Function Blocks.

DECS operating features include four operating modes, four protective functions, startup provisions, reactive droop compensation, underfrequency compensation, and optional voltage matching. The circuit induces a 1,ohm burden on the dc source. An open contact enables the DECS to control the generator reactive power in either the var or the power factor mode. The contact has no effect when this function is not enabled in the software.

Reactive Droop Compensation The DECS provides a reactive droop compensation feature to assist in the sharing of reactive load during parallel generator operation. When this feature is enabled, the DECS calculates the reactive portion of the generator load using the sensed generator output voltage and current quantities and then modifies the voltage regulation setpoint accordingly.

If transfer to manual is selected and a loss of sensing occurs, the relay output closes, and the DECS transfers to the Manual mode of operation after the adjustable time delay expires. The DECS will remain in this mode of operation until power is cycled. It is designed for behind the panel mounting and requires a cutout for front panel viewing. Mounting hardware consists of six customer supplied, 12 thread-forming screws that pass through mounting holes in the conduit box and thread into the plastic shell of the DECS Page 24 Figure Page 25 Figure Figure shows the terminal connections located on the rear panel of the DECS Except as noted above, connections should be made with minimum wire size of 14 AWG.

To connect this switch, the center pole, or common terminal, must be connected to terminal 7. The other two terminals are connected to terminals 6U and 6D.

This remote adjust switch may be mounted up to feet away from the DECS when using twisted, shielded cable. Figure Illustrates the pin assignments of the communication port and Table Identifies the RS connector pin functions.

Figure shows another PMG application but with single-phase voltage sensing. Figure shows an application where DECS operating power is derived from the generator output shunt application and three-phase voltage sensing is applied to the DECS Page 30 Figure Page 31 Figure Page 32 Figure Page 33 Figure Tag and disconnect all wiring to the DECS Be sure to insulate the wire terminals to prevent a short circuit. Page 36 Figure See the Password Protection sub-section for information about changing the password.

In the event of a power loss, these are the settings that are active at power up. This setting field is used to enter the nominal output of the current transformer CT that supplies the DECS with B-phase generator line current. A value of 1 A or 5 A may be entered. Version Numbers. These two version numbers are read-only.

The setpoint value is adjustable from 0 to 10 percent in increments of 0. The setpoint is based on a 0. Page Control Gain The soft-start time can be set from 1 to 7, seconds in 1 second increments. Voltage Matching - Speed sec. This setting determines how quickly the generator voltage is adjusted by the DECS to match the bus voltage. The Speed setting is adjustable from 0 to seconds in 0. Page 43 Figure Control Gain Screen Table This setting adjusts the integral gain and determines the characteristic of the DECS dynamic response to a changed PF setting.

PF KI values of 0 to 1, may be entered in increments of 0. The sensing values and alarm signal indicators of the FCR tab are also displayed by the other tabs of the Analysis screen. Clicking and holding this button causes the button label to change from OK to Index 1. The value of current in this field determines the excitation level that will cause the DECS to issue an overexcitation limit alarm.

A current level of 0 to 15 A may be entered in 0. Clicking the PF button changes the color of the adjacent PF indicator to green and causes the DECS to maintain the desired power factor regulation point. The power factor regulation point can be set within the range of 0. Each click of the Raise button increases the voltage setpoint 0.

The word proportional means that the response of the DECS output is proportional or relative to the amount of change that is observed. Integral means that the DECS output is proportional to the amount of time that a change is observed. Integral action eliminates offset. To remove a list record , pull down the PID List and select the record or list so that the gain and time constant parameters are displayed.

Click the Remove Record button and the listed record is deleted. When the file command is given, a dialog box asks if you want to save the current settings into a DECS data file. Page Password Protection The upload process is started by clicking the open icon or clicking File on the menu bar and then clicking Open. A dialog box is then displayed Figure reminding you that the DECS should be off-line before uploading settings. This question is asked even if no changes were made to the DECS settings.

Page 58 5. Click the Start Transfer Data button to proceed with software uploading. The dialog box of Figure appears and recommends that your DECS settings be saved in a file that can be uploaded to the DECS after the embedded firmware is updated. Page 59 Figure Refer to the Settings Files subsection for information about creating a settings file. Clicking Yes continues with the upload process and displays the Open dialog box of Figure Page 60 Figure A readily available data cable can be used to connect your handheld to the DECS The handheld can then be connected to the DECS and the settings file uploaded.

A summary of the individual settings available at each screen is provided in Table An alarm condition is indicated by a checked box. Selections from the drop- down menu enable you to create a settings file, send a settings file to the DECS, retrieve settings from the DECS, and delete user-created settings files from the file list on the File Operations screen. Page 71 No Voltage Matching Use the following troubleshooting procedures when difficulties are encountered in the operation of your excitation system.

Step 7. Verify that the DECS soft start settings are correct. Too long of a soft start setting may give the appearance of no buildup. If the soft start settings are incorrect, adjust the settings. Verify that the case of the DECS is properly grounded.

Step 3. Replace the DECS Step 2. Page No Voltage Matching If the load being applied to the generator is inductive, proceed to Step 7.


DECS-100-A05 BASLER AVR, Digital Excitation Control System

Building on Basler's innovative pioneering of digital excitation controls, the DECS offers a full range of functionality in a high-powered, yet cost-effective package. The dynamic capabilities of the DECS provide precise voltage regulation and exceptional system response, while providing valuable protection of the generator and excitation system. Benefits of DECS Microprocessor-based controller integrates a function-packed, easy-to-use feature set, reducing installation costs by eliminating peripheral components while maximizing functionality to easily meet customer-specific requirements. The powerful seven amp, pulse-width-modulated power stage provides high field forcing for exceptional system response. DECS's rms sensing and rugged power stage create an easy, worry-free solution for applications containing high waveform distortion caused by non-linear loading. Integrated generator and exciter protection ensure reliable and safe operation of the entire system.


DECS100-B11 - Basler

It can be used on almost any generator up to 5MW. It can put out 63Vdc and 7. Four control modes: automatic voltage regulation AVR , manual or field current regulation FCR , power factor PF regulation, and reactive power var regulation. The DECS regulates the output voltage of a brushless, ac generator by controlling the current into the generator exciter field.


Basler DECS-100 Instruction Manual




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