Input window for the relevant protection device data (left) with a short dimensioning report (right)
Electrical power systems are undergoing continuous changes. This applies to their secondary control and protection applications as well. Therefore, the necessity of proper design of instrument transformers to modern power system protection and control equipment is one of the crucial issues within the power system engineering.
CTDim is a software tool for current transformer (CT) and voltage transformer (VT) dimensioning. By optimizing the current transformer data with respect to the technical requirements and economic impact engineering and production costs can be saved.
Please find the related datasheets under Downloads.
The tool offers:
Straightforward check whether CTs and VTs fulfill requirements of connected devices
Supporting distance protection, generator protection, transformer protection, line differential protection, busbar protection as well as overcurrent protection.
Powerful documentation: Short and long reports are prepared automatically.
Both protective CT cores as well as metering CT cores included. Dimensioning for VT protective and metering windings covered. CT cores as per international standards supported:- IEC protective CT classes: 5P, 10P, 5PR, 10PR, PX (former BS Class X), TPX, TPY, TPZ and TPS - ANSI protective CT C-Class, as well as - IEC metering classes: 0.1, 0.2, 0.5,1,3, 0.2S and 0.5S
Transient simulation of CT behavior for all above mentioned protective CT classes and protection devices. Comtrade export function allowing hardware testing.
Large relay and metering instrument database: Siemens numerical relays fully supported, as well as big number of non-Siemens devices
Users benefit from:
Highly efficient current transformer dimensioning
Savings in engineering and production costs by optimizing the current transformer data
Consideration of latest international instrument transformer standards
Automated generation of reports supports high quality of project documentation
Customized data base for metering devices speeds up calculation time
Exportable simulation curves enable relay testing with regard to CT saturation and DC-component, especially within systems with high X/R-ratios
Easy check of VT and CT burden avoids extensive under-burdening of instrument transformers and helps when specifying instrument transformers
Latest enhancements to CTDim include:
Technical dimensioning and optimization of CTs according to new IEC 61869-2 Standard (former IEC 60044-1, IEC 44-6) and ANSI C53.13-2008
High impedance protection scheme calculations include MOV and stabilizing resistor dimensioning
Rct (internal CT resistance) estimation
Flexible customization of metering instrument data base
Export of results of transient simulation into COMTRADE file format
Windows 7 compatibility
For technical support, please use our contact form.
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