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Home > About Us > Press Center > 2003 Press Releases : Press Release |
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GE Power Systems Enhances Its D25 Multifunction IED for Substation Control ATLANTA, GEORGIA (May 21, 2003) — GE Power Systems has announced that its Substation Automation Solutions business has enhanced its existing D25 multifunction intelligent electronic device (IED) for substation control by adding several new features that increase the flexibility of the appliance, improve performance and ultimately reduce lifetime ownership costs for the end user. The enhanced IED product, the D25 generation 4, is available immediately. “The D25 has been a highly competitive product in the marketplace for some time,” stated Carolyn Shockley, general manager for the Substation Automation Solutions business, based in Atlanta. “With the addition of the new features, we expect the product will continue to be one of the leading multifunction IEDs in the industry and an excellent choice for those customers looking for the full range of substation control this product offers.” The D25 combines several new features that are now available in a single substation controller. Fluxbuster Fluxbuster™ technology allows the D25 to monitor and record current waveform levels up to 42 times nominal. This guarantees the true recording of an asymmetrical fault current waveform with magnitude of 20 times nominal and under offset conditions. The Fluxbuster has accuracy of 0.3% of nominal. Definite Time Over Current Protection The Definite Time Over Current Protection algorithm provides a “3-steps” time-current characteristic. Each step has a unique current-time configuration pair which is set by the user for each protected circuit. The D25 provides Definite Time Over Current Protection to a maximum of five individual circuits. Breaker Failure Protection The Breaker Failure Protection feature monitors and verifies that the fault current is interrupted as required. If the fault current still exists after a configurable period of time, the Breaker Failure Protection application operates a configured control point to open a breaker further upstream. This protection is enabled simultaneously on all defined circuits. Synchronism The D25 supports the Synchcheck and Synchronizing functions, including a synchronism bypass function for any or all of the following conditions: • Dead Line - Live Bus, • Dead Bus - Live Line, and • Dead Bus - Dead Line. The D25 monitors voltage difference, phase angle difference and slip frequency to ensure proper breaker closure as per user defined settings. Dynamic Bus Switching The D25 supports multiple buses per feeder, where each bus is defined by a set of PTs and a digital input that indicates when the bus is active on that feeder. These digital inputs are referred to as Active Bus Indications. The D25 monitors the Active Bus Indications to determine which set of PTs to use for the feeder. This unique ability allows for dual-busbar schemes to be reconfigured dynamically maintaining your system-metering scheme without requiring an external voltage selection scheme. “We expect that customers will find our protection and automation applications enhancements to be especially appealing,” explained Shockley, “since they are embedded in a product that has all the functionality of a traditional RTU. We have also added some other features to the D25, such as AC data profiling, multistage alarming and thermal calculation to name a few, that provide one of the most complete substation controller solutions available.” The D25 multifunction intelligent electronic device (IED), can replace multiple devices with a single unit. It functions as a programmable logic controller, a substation local area network node, an IED gateway, a bay level controller, a non-certified revenue class meter, a power quality monitor, and a fault/event (waveform) recorder. For more information about the D25 IED, contact GE Power Systems product specialist Jim McGhee in Calgary at (403) 214-4505 or at jim.mcghee@ps.ge.com. GE’s comprehensive transmission and distribution automation assemblage includes expert services to cost-effectively manage and execute substation automation projects, from design engineering to installation and commissioning. The collection of services is complemented by an assortment of products and solutions such as controllers and intelligent electronic devices (IEDs), portable test equipment, and transformer management systems which enable utility personnel to further improve asset performance and network reliability. About GE Power Systems GE Power Systems (www.gepower.com) is one of the world’s leading suppliers of power generation technology, energy services and management systems with 2002 revenues of nearly $23 billion. The business has the largest installed base of power generation equipment in the global energy industry. Based in Atlanta, Georgia, GE Power Systems provides equipment, service and management solutions across the power generation, oil and gas, distributed power and energy rental industries. > Press Contacts > More 2003 Press Releases |