Bussmann series fc2 available fault current calculator. These curves separate regions of the stereonet into zones where compressional seismic pwave motions and dilatational pwave motions radiate from an earthquake fault. Thus, the pole or normal of the auxiliary plane is a point on the stereonet which must be on the curve of the fault plane. This c programming code is used to find the parametric equation plane. This demonstration generates earthquake focal mechanism plots, also called fault plane solution plots or simply beach balls. The scientific notation calculator converts any decimal to scientific notation. The identification of the fault plane should be possible, even with a single.
Only 10 hands were raised, out of about 150 people in the room. When rocks slip past each other in faulting, the upper or overlying block along the fault plane is called the hanging wall, or headwall. The pattern of energy radiated during an earthquake with a single direction of motion on a single fault plane may be modelled as a double couple, which is described mathematically as a special case of a second order tensor similar to those for stress and strain known as the moment tensor. We succeeded in subdividing the data set of the small and large earthquakes into 25 and 3 subsets, with the average misfit ranging from 3. Fpfit is a fortran program that computes doublecouple fault plane solutions from pwave first motion data using a grid search method. Earthquake mechanism and fault plane solution information is. Design master electrical rt is an addin for revit that calculates the available fault current at all of the panels and transformers in a project. If the resistance was zero, then the calculated fault current would go to. You can define the strike, dip, and rake angle of a fault and choose between different types of projections and focal hemispheres. This diagram was created in conceptdraw diagram using the plane geometry library from the mathematics solution. Fault plane solution displays rightlateral strike slip faulting that having an extension of normal fault component with a dip of 65degrees and a mean displacement of. When you click text, the code will be changed to text format. If the mohrcoulomb criterion is used to represent the residual strength the minimum strength reached by the rock subjected to deformation.
This provides valuable time to think about the prospect, as compared to rushing to finish the laborintensive task of manual fault picking with legacy software in the. I have asked the same question at seminars around the country and i find more people are using the system, but its always less than half the people in the room. Fortran code to get the auxiliary fault plane solutions. Robertson 1970, while recognizing that there is considerable variation, suggested that the peak cohesion be about 16% of the unconfined compressive strength. The first three faults are the unsymmetrical faults. A fault trace or fault line is a place where the fault can be seen or mapped on the surface. Calculating auxiliary fault plane solutions given the main. Fc2 mobile app quickly delivers fault current calculations in the palm of your hand. This c program code will be opened in a new pop up window once you click popup from the right corner. Earthquake locations the systematic location of seismic events in a region can be used to identify causative seismic faults. Jun 27, 1988 the state plane coordinate system was brought up, and i asked everybody using state plane coordinates to raise their hand. The term focal mechanism or fault plane solution conventionally refers to fault orientation, the displacement and stress release patterns and the dynamic process of seismic wave generation.
This sample shows the flowchart of an algorithm that can solve quadric equations. Fault plane profiles are a fundamental tool for prospect assessment as well as a first step in understanding seal behavior in existing fields. The state plane coordinate system was brought up, and i asked everybody using state plane coordinates to raise their hand. When there is a short circuit the resistance becomes very small, and that means the current becomes very large. Pdf focal mechanism determination and identification of the. A fault plane solution is a way of showing the fault and the direction of slip on it from an earthquake, using circles with two intersecting curves that look like beach balls. Earthquake glossary usgs earthquake hazard program. These calculations involve determining the current flowing through circuit elements during abnormal conditions short circuits and earth faults. What are the possible senses of motion on the nodal planes. A fault plane profile fpp is a cross section in the plane of the fault that shows both the hanging wall and footwall cutoffs. And we will also plot to solution to visualize the results. Fault plane solution how is fault plane solution abbreviated. Dynamics of faulting and fault plane solution springerlink.
Determination of the fault plane using a single nearfield seismic. Read more calculating auxiliary fault plane solutions given. The term focal mechanism or faultplane solution conventionally refers to fault. Lets first consider base kva and kv for ht and lt side. Calculating auxiliary fault plane solutions given the main fault. This demonstration generates earthquake focal mechanism plots also called fault plane solution plots or simply beach balls. Fault level at ht incoming power supply is 360 mva. The auxiliary plane is perpendicular to the fault plane. To do this, fault data was collected from many sources, and various faultlocation approaches were evaluated.
This provides valuable time to think about the prospect, as compared to rushing to finish the laborintensive task of manual fault picking with legacy software in the hopes that it will be complete. Macr1d is a onedimensional seismic traveltime calculator for. The significant figures calculator performs operations on sig figs and shows you a stepbystep solution. The fault is calculated based upon the current from the utility and from any motors in the project. In measuring the horizontal or vertical separation, the throw of the fault is the vertical component of the separation and the heave of the fault is the horizontal. Its a useful and convenient way to represent different algorithms in the form of flowcharts. A fault plane is the plane that represents the fracture surface of a fault. You can define the strike dip and rake angle of a fault and choose between. Earthquake focal mechanism wolfram demonstrations project. On world maps, seismicity tends to locate along linear belts which define more active deformation compared to more. Catalog of fault plane solutions for the earthquakes occurred.
The companion programs fpplot and fppage plot the results on stereo nets for interactive viewing or for printing. By using this website, you agree to our cookie policy. This c programming code is used to find the cartesian equation of a plane. A fault trace is also the line commonly plotted on geologic maps to represent a fault. Note also that if the system is earthed through an impedance z n carrying current 3i 0 then an impedance 3z n carrying current i 0 must be included in the zero sequence impedance network. These quantities igned to characterize the are reported, together with the fault plane solution, in the programs output. Bussmann series fc2 available fault current calculator easily calculate available fault current anytime, anywhere fc 2 mobile app quickly delivers fault current calculations in the palm of your hand. Slip is defined as the relative movement of geological features present on either side of a fault plane. The ability to determine the direction of motion on faults has provided a vital tool for understanding processes occurring at plate boundaries.
These quantities igned to characterize the are reported, together with the faultplane solution, in the programs output. Fault plane solution displays rightlateral strike slip faulting that having an extension of normal fault component with a dip of 65degrees and a mean displacement of 0. You can select the whole c code by clicking the select option and can use it. A16 fault level on 11kv side for percentage impedance 100 x 10 of 10. Catalog of fault plane solutions for the earthquakes occurred on the romanian territory. Software to download usgs earthquake hazard program. Calculate fault current at each stage of following electrical system sld having details of. Identities proving identities trig equations trig inequalities evaluate functions simplify. The focal mechanism of an earthquake describes the deformation in the source region that. Fault plane profiles are important because they show what is being juxtaposed across the fault.
An experienced user spent 10 minutes creating this sample. This failure condition is shown graphically in figure 12. Gates are the logic symbols that interconnect contributory events and conditions in a fault tree diagram. Structural geology programs for the mac and windows by rick allmendinger of cornell university. Keywords fault plane focal mechanism hanging wall moment tensor nodal plane. The equation is simple, just ohms law see figure 2. Pdf catalog of fault plane solutions for the earthquakes. P 2 indicating the additional pore pressure increase c f cot. Fault level calculator software free download fault.
Faultplane solutions determined by waveform modeling. This lesson introduces the students the idea about fault plane solution. Attitude of planes a bedding, cleavage, foliation, joints, faults, axial plane are some of the geological structures that are represented as a plane. Wbz using 470 fault plane solutions, which we determined for earthquakes with m. This website uses cookies to ensure you get the best experience. Two open conductors fault the shunt type of fault are classified as. Determination of the fault plane using a single nearfield. Earthquake mechanism and fault plane solution information is fundamental to.
Calculate and plotfaultplane solutions from firstmotion data. A line plots as a point and a plane plots as a great circle. Variation of generator reactance during a fault fault calculations 12. You can plot two types of features on a stereonet, a line e. Fault current calculations are based on ohms law in which the current i equals the voltage v divided by the resistance r. This allows fault extraction and interpretation at unprecedented speeds and interpretation of the sharpest and most accurate fault plane geometries. Bussmann series fc2 calculatorfault current calculation. Mohrcoulomb failure an overview sciencedirect topics. A fault is an abnormal or unintended connection of live elements. Explanation of immediate faulting or mechanism of earthquake is one of the most fascinating and significant problems in seismology. Scan qr code to download mobile app, open tab below for webbased version. Program to calculate the strike, dip and rake of the. A mobile app and webbased application for determining the fault current of single and three phase systems with fuse selection and conductor sizing guides.
To carry out successful fault plane solution you need. Ohmslaw algorithms if we know the voltages and currents during a fault, we can use these to estimate the distance to the fault. Find the equation of the plane containing the three points p 1 1, 0, 1, p 2 0, 1, 1, p 3 1, 1, 0. A fault plane solution is simply a method for using seismograms from an earthquake to study the faulting process. The solution shortterm investigations and findings femafunded bssc study summary of new requirements asce 7 16 section 11. A faults sense of slip is defined as the relative motion of the rock on each side of the fault with respect to the other side. The moment tensor solution is typically displayed graphically using a socalled beachball diagram. Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. For example, suppose you are looking at bedding planes exposed in a quarry wall. In its basic form its goal is to determine the focal mechanism. Makes pointtopoint fault current calculations easy.
It is now necessary to find the fault current distribution in the various branches of the network and in particular the current flowing from a to x on the assumption that a relay at x is to detect the fault condition. Fault plane definition of fault plane by the free dictionary. It also determines the type of fault movement normal, reverse or strike slip. Arithmetic mean geometric mean quadratic mean median mode order minimum maximum probability midrange range standard deviation variance lower quartile upper quartile interquartile range midhinge. Variation of current with time during a fault fault calculations 11. We have calculated the auxiliary fault plane solution using the input of main fault solution in perl. The physical process of elastic strain accumulation and the triggering mechanism are the basics to understand the earthquake kinematics. Geology the plane along which the break or shear of a fault occurs. General purpose stereographic projection program for plotting lines, planes, density contouring, rotations, etc. The slope calculator helps find the slope of any line through two. The resolution of the resolved fault plane solution allows correlations with the stress field in the area. Fault plane solution or focal mechanism represnets the parameters of rupture plane i.
Fault plane solutions are useful for defining the style of faulting in seismogenic volumes at depth for. The equivalent impedances viewed from either side of the fault are shown in. All elements plotted pass through the center of the hemisphere, and their projection reflects where the plane or line intersects the outer hemispheric surface. The and and or gates described above, as well as a voting or gate in which the output event occurs if a certain number of the input events occur i. Graphical solution modified drawing parallels and perpendiculars with triangles first draw 2 lines which are perpendicular to the strike line aa and cc second, draw the right triangle, bdc. The values of z 1, z 2 and z 0 are each determined from the respective positive, negative and zero sequence impedance networks by network reduction to a single impedance note that the single phase fault current is greater than the three phase fault current if z 0 is less than 2z 1 z 2 note also that if the system is earthed through an impedance z n carrying current 3i 0 then an. Note that the single phase fault current is greater than the three phase fault current if z 0 is less than 2z 1 z 2. This problem is identical with changed numbers to the worked example we just saw.
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