The 100a cb has a std set at 6 cycles and the 800a cb has a std set at 24 cycles. Curves the abb software for trip characteristics coordination the. An organized timecurrent study of protective devices from the utility to a device. Ltpu long time pickup ltd long time delay stpu short time pickup std short time delay inst instantaneous gf ground fault gfd ground fault delay l s i g timecurrent curves circuit breakers cargill electrical team meeting 22. As this curve is reporting the amount of current vs time, it. Selective coordination time current curve charts electric arc. The one line diagram shown in figure 2 is represented in the tcc curve in figure 3 figure 3. How can i get the tcc for two type of breakers entries. Abbs electrification business has always been at the forefront of innovative electrification and today is writing the future of safe, smart and sustainable electrification. Computer programs allow the designer to select timecurrent curves. In these articles, i have discussed the methodology on how to create timecurrent curves using excel.
Use curves to get timecurrent, energy and peak limitation characteristics of abb low voltage devices. Caneco tcc time current curve is used to study the selectivity of an installation by superimposing the time current curves of the equipment in an installation. Characteristic cutoff current and letthrough energy curves are also displayed. Industrial solutions empowers smarter business operations by connecting equipment, software and services to protect, control and optimize assets within electrical infrastructures. With the scatter plot you can choose which column is the x values and which. The only way that i know of to obtain the time current curve is with their siemens curve plotting software, easy tcc. Add protective devices to your project to view the curves chart. The simaris curves software, which also comes free of charge, visualizes characteristic curves with tolerance bands as well as setting options of specific parameters for lowvoltage protective devices and fuses iec. Jul 19, 2016 hihow can i get the tcc for two type of breakerswl i 1600 with a etu25bwli with a etu25bthanks split from circuit breaker testing etu25b. Cyme power engineering software protective device analysis. Software for the study and control of selectivity by curves. Caneco tcc timecurrent curve is used to study the selectivity of an installation by superimposing the timecurrent curves of the equipment in an installation. The timecurrent characteristic curves for the protective devices can be visualized onscreen, plotted on standard loglog paper and routed to various printers. Results are based on the overlap of tripping curves of the various electrical protection systems.
Jan 28, 2014 a time current curve tcc plots the interrupting time of an overcurrent device based on a given current level. With an extensive library of over 15000 protective devices, an intuitive graphical plot and a broad range of tools and analyses, planning and validating protection schemes has never been. A comparison of the time it takes protective devices to operate when certain levels of normal or abnormal current pass through them. Time current curve equations for mcbs myelectrical. Ges6164 power break with magnetrip types tpmm thmm 1200 1600af. Simaris curves electrical planning software simaris. To set the new protection and to see the result on the time current curve.
As this curve is reporting the amount of current vs time. Ltpu setting timecurrent curves circuit breakers cargill electrical team meeting 23. The protective device analysis module is an indispensable tool to help power engineers effectively address protection issues by analyzing timecurrent curves. The program comes with an extensive database of over 15000 protective devices from more than 100 different manufacturers that are easily accessed to produce time current curve plots and device settings reports. This type of separation of the curves should allow for selective coordination, assuming that the breakers circuit breaker. Then select scatter plot with connected lines for the plot type. Major elements of the time current curve are labeled. Low and medium voltage power circuit breakers timecurrent curves. Using plot options, it is possible to customize the display of the current and time axes, legend, grid, curve plotting colors and properties, and more. Control engineering understanding time current curves. Curves allows the visualization of the time current, letthroughenergy and peak limitation characteristics of abb low voltage devices as well as cables and transformers. Timecurve scheduler is a web based employee scheduling software, designed to meet employee scheduling needs of small and midsize business such as home care agencies, hvac technicians, pet sitting and cleaning services and in general, any business that needs to schedule employees to service clients andor locations. An easy way to calculate prospective shortcircuit current levels. Making your time current curves tccs look presentable in etap.
Browse through a library of generic manufacturerindependent protective devices. Set curves easily with a mousesimply click and drag, seeing the exact manufacturers settings as you drag. It can be seen from the timecurrent curve on the following page that actual timecurrent curves are drawn on loglog paper, and the horizontal line is in multiples of the breakers continuous current rating. Electrical engineers use powertools to perform harmonic analysis, transient stability analysis, short circuit analysis, and to determine demand load, voltage drop, arcflash hazard analysis and protective device coordination. Electrical calculation tools is a set of 7 computer aided online tools designed to help you. However, if you are doing selective coordination studies occasionaly only, than spending money to purchase an expensive software program may not be feasible. I couldnt figure out how they have manipulated required data. Ges6167 power break with magnetrip types tpmm thmm 3000 4000af. Easy customizable layout of the oneline inside the tcc. Time current curves can also be plotted and selective coordination for any particular application can be verified by using ms excel.
White paper understanding time current curves 26 figure 2. Industrial solutions empowers smarter business operations by connecting equipment, software and services to protect, control and. Timecurrent curves can also be plotted and selective coordination for any particular application can be verified by using ms excel. Meeting the challenges of changing energy systems requires cuttingedge products and services covering the entire energy value chain. It is a convenient and easy converting documents to pdf tool, which can convert different document formats to pdf in batches once with the fast way. Curve3 also has a new demo mode which allows users to test the interface as well as the main calibration and verification functionalities of curve3 including verify mode without a serial number. The cymtcc software addresses time over current protection for industrial, commercial and distribution power systems. Search publications, browse by publication type or browse by product.
Keep in mind that the xaxis of the chart represents the lowvoltage side current. Whether you are designing a new installation, expanding an existing one or doing maintenance, electrical calculation tools is a suite of online tools for a quick protection device selection, selectivity checking and cable calculation. The tripping curve of the fuselink is drawn on the chart. These curves are provided by the manufacturers of electrical overcurrent interrupting devices, such as fuses and circuit breakers. Curve direct interfaces with rsu modules which let you modify the settings of micrologic.
The program comes with an extensive database of over 15000 protective devices from more than 100 different manufacturers that are easily accessed to produce timecurrent curve plots and device settings reports. So, the mediumvoltage protecive devices are drawn on the chart by multiplying their current by the ratio. Creating coordination curves with excel timecurrent curves with excel ii timecurrent curves with excel iii timecurrent curves with excel iv i would suggest that if you are not familiar with creating graphs in excel that you go to each. Calculation tools for low voltage electrical network. The graph below has been created using excel charting tool. Timecurve software, inc online employee scheduling system. I commonly use inverse time, definite time, and instantaneous elements, all on the same relay. Electrical calculation tools schneider electric global. The shorttime region will cause the breaker to trip at a lower current than the instantaneous region, but acts after a short delay by definition. Specifically, it calls for a comprehensive portfolio of physical and digital technologies, products and solutions that allow us. It can be seen that the higher the current, the shorter the time the circuit breaker will remain closed. This is a feature of many electronictrip circuit breakers, and is not intentionally provided on standard thermalmagnetic, moldedcase units. Cyme international software, protective device coordination.
I commonly use inversetime, definitetime, and instantaneous elements, all on the same relay. Additional time current curve excel xls selection free excelxls to pdf converter excelxls to pdf converter is perfect for anyone. Understanding time current curves maverick technologies. The cymtcc software addresses time overcurrent protection for industrial, commercial and distribution power systems. Locate trip curves for all thermal magnetic and electronic trip circuit breakers and micrologic trip units. Jan 21, 2014 a time current curve tcc plots the interrupting time of an overcurrent device based on a given current level. Curve direct is a tool designed to carry out a discrimination study based on protection device tripping curves.
Using the star protection and coordination module in etap. Timecurve scheduler is a web based employee scheduling software, designed to meet employee scheduling needs of small and midsize business such as home care agencies, hvac technicians, pet sitting and cleaning services and in general, any business that needs to schedule employees to service clients andor. Set curves easily with a mousesimply click and drag, seeing the exact manufacturers settings as. White paper understanding time current curves 46 the next section of the curve moving up the time axis is the long time section.
Electricaldesign curves is a free software tool with which you can easily visualize and evaluate the tripping curves for a large number of protective devices. Software, protective device coordination cyme international. Time current curves how to read tcc plots maverick technologies. Protection, coordination and selectivity software relay. The timecurrent characteristic curve is different for inverse time, definite time, and instantaneous relays.
Electricaldesign curves tisoft engineering software. Star sequenceofoperation sqop software evaluates, verifies, and confirms the operation and selectivity of the protective devices for various types of faults for any location directly from the oneline diagram and via normalized time current characteristic curve tcc views. Shortcircuit results shown right in the tcc oneline, including all fault types, asymmetrical or symmetrical values, and remote voltage and currents. It also contains equation parameters for espeed, tspeed, tap, main, ieee, and iec curves. The time current characteristic curve is different for inverse time, definite time, and instantaneous relays. Special application molded case circuit breakers timecurrent curves.
Curves is an instant software for setting the trip characteristics of the protection devices and verifying selectivity between abb circuitbreakers in low voltage plants. Loadcenter, panelboard and industrial miniature breakers timecurrent curves. Sample files are included and must be used for demo mode. The bussmann series pointtopoint shortcircuit current calculator is a simple, easytouse program that allows you to calculate prospective shortcircuit currents with a reasonable degree of accuracy. Caneco tcc enables protection relays to be adjusted, in order to ensure.
While going through my offices old files, i found a excel file where previous employees 1015 years ago draw tcc curves of some relays. A time current curve tcc plots the interrupting time of an overcurrent device based on a given current level. It is not necessary to plot time current curves or do a shortcircuit current analysis if the available shortcircuit current is less than 200,000a or the interrupting rating of the fuses, whichever is less. Every circuit breaker has a characteristic curve that reports the manner in which it trips. View and download the timecurrent curves and energy letthrough curves. Timecurrent curves using excel part 1 filipino engineer. These new online software tools will progressively substitute curve direct and direct. You can use combinations of curve types to achieve the design requirements. Caneco tcc time current curve software provides an accurate diagnostic overview of electrical power supply continuity. Difference between instantaneous, definite time and. These curves are part of the product acceptance testing required by underwriters laboratories ul and. Instantaneous, selective and antiperturbance versions.
These values can be calculated on the load side of a transformer, at the end of a. Locate trip curves for contactors and overload protection relays. Besides revealing curve overlaps, ecoord can also analyze the melting and clearing i. Etap star protective device coordination software provides a plot options tool with all the necessary options to customize the display of the time current characteristic curve. Use two columns for each curve, one for time and the other for current. The short time region will cause the breaker to trip at a lower current than the instantaneous region, but acts after a short delay by definition. Ecoord is supplied with a library of over 2,000 protection devices from numerous manufacturers. Protective devices timecurrent curves made easy tisoft. Feel free to download the original worksheet and use it as a template for drafting your own selective coordination charts. Ecoord gets the job done right when it comes to analyzing timecurrent curves for overcurrent protection devices. Relay coordination using microsoft excel electric power.
Once the plot is created, double click each axis and choose logarithmic scale in the scale tab and adjust the scale range as desired. Ratio phasetophase medium voltage phasetophase low voltage 20000400 50. Difference between instantaneous, definite time and inverse. The elite software short circuit calculation dos based program is a powerful yet easy to use tool that allows the designer to quickly obtain the maximum potential short circuit current at each node bus in a radial electric power distribution system with up to 2,000 components.
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