ECODIAL 3.36

1 2 SIS - Franck MEGRET - June 2004 - English 1. INTRODUCTION  Ecodial 3.36 :  98 SE, Win 2000, XP  Included :  Contactors , Circuit breakers (Telemecanique),  Thermal relays, Soft starters, Variable speed drives, Capacitors  Calculation method : CENELEC (R0064-003)  Installation rules : IEC364, C15-100 (ed. 2003), BS7671 3 SIS - Franck MEGRET - June 2004 - English  Calculation standards define the formulas that should be used to calculate short circuit currents.  IEC909 : method to calculate three phase short circuit currents in electrical installations  IEC363 : method to calculate three phase short circuit currents on ships  What is a calculation GUIDE ?  A simplified method that is usually accepted internationnally under certain conditions.  CENELEC guide R064-003 (as known as NFC15-500): method for calculating ALL short circuit currents (min, max, earth fault, single phase, three phase, …), voltage drops, cable short circuit withstand…  Guide often ignores transient phenomenon such as motor contribution, asymetric component, inrush when calculation short circuit levels.  Simplification is acceptable as product standards (IEC60947-2) take these transient phenomenons into consideration, for example : - an 50kA Icu breaker must be able to ‘make’ at least 110kA peak Icm What are ‘calculation standards’ ? IEC909, IEC363, 4 SIS - Franck MEGRET - June 2004 - English What are ‘installation rules’ ? IEC60364, NFC 15-100, BS7671, CP5, AS3008,  Installation rules address all the issues relative to safety :  overload protection  minimum cable sizes  protection against direct and indirect contact  short circuit protection These rules are usually all based on the same inital document (IEC60364), onto which each country usually includes local requirements (temperature, safety, cable derating…). 5 SIS - Franck MEGRET - June 2004 - English What is Ecodial ?  Ecodial is a low voltage network calculation tool.  It can calculate simple ‘arborescent’ type networks  no loops/ring feed systems  Ecodial calculates  cable cross section based on - upstream protection setting, maximum allowable voltage drop, protection against indirect contact,  short circuit currents according to : - type of short circuit, polarity of circuit and earthing method  sets protection devices based on - short circuit currents, expected loads, … 6 SIS - Franck MEGRET - June 2004 - English What Ecodial is not :  Ecodial is not :  A medium voltage design tool  A tool that can be used lightly : professional engineers must check verify and certify these results  The solution to all the possible design problems that one may encounter.  Ecodial cannot solve all the layouts  Several studies could be made  Simplified network should be drawn 7 SIS - Franck MEGRET - June 2004 - English  General characteristics - definition of the global parameters (voltage, earthing, …)  Drawing - definition of the network layout  Definition of circuit characteristics - definition of the terminal load, and all the cable lengths  Power sum - calculation of the required power, and current in the distribution circuits  Calculation - sizing of cable, calculation of short circuit currents, choice of equipment, …  Results - printout of the input / output used for the calculations The main steps of an Ecodial study 8 SIS - Franck MEGRET - June 2004 - English  Un Ph-Ph (400V) : sets the LV network voltage. This value corresponds to a phase-phase voltage  Earthing arrangement (TNS) : sets the earthing arrangement at the transformer. This value can only be changed in a network after an LV/LV transformer, or from TNC to TNS.  Cascading (YES) : authorises Ecodial to use reinforced breaking capacity to choose downstream breakers. This can help reduce the cost of an installation.  Discrimination (standard) : displays the discrimination results and chooses breakers giving better discrimination results.  Smax (240mm²) : sets the maximum cable CSA that Ecodial can use when sizing cables (multiple cables in parallel can always be used though) General characteristics Calculation / General characteristics 9 SIS - Franck MEGRET - June 2004 - English  CSA N / CSA Ph (1) : sets the minimum ratio between phase and neutral conductors. This is used to allow half neutrals (1/2) or require full neutrals (1).  Tolerance (5%) : Ecodial calculates the theoretical Phase CSA. Tolerance can be included to allow the choice of cable slightly smaller than the theoretical value.  Standard (IEC947-2) : Allows the user to choose a default product standard (IEC947-2 or IEC898) according to which the breaking capacity of the circuit breakers are given. If the standard is set to IEC898, Ecodial automatically chooses IEC947-2 if no IEC898 are available  Target power factor (0.96) : this is the value Ecodial will use to size the required capacitor bank. It corresponds to the power factor downstream of the transformer.  System frequency (50Hz) : enables users to choose products that are suitable for 60hz applications (capacitors, …).  Thermal stress compliance (No) : enables Ecodial to check out that cables chosen are in compliance with thermal stress under short circuit. General characteristics Calculation / General characteristics 1 0 SIS - Franck MEGRET - June 2004 - English  Characterisrics spread down  One will be able to modify some of these characteristics afterwards. Ecodial will then ask whether the modified characteristic should be spread abroad down the electrical network or not. This function can be quite useful in case the user is looking quickly for the results of a variant of its own design Spreading properties Calculation [...]... connected to a three phase board, Ecodial can automatically suggest a phase distribution solution The automatic distribution can be modified The logic applied is the following Ecodial sorts the loads by decreasing intensity Starting from the highest load, Ecodial will place the loads onto the first phase until the sum of these loads is equal to 33% of the total load Ecodial then tries to load the... : a reminder of the system voltage If change, Ecodial will propose to spread down this property downstream Short circuit voltage : since version 3.36, Ecodial reads values of transformer’s reactance and resistance in tables 2A&2B of the UTE 15 106 High Voltage short circuit power : short circuit level on the medium voltage side of the transformer Enables Ecodial to read in tables 2A&2B to determine... the system voltage If change, Ecodial will propose to spread down this property downstream X’o (%) : zero phase impedance, 6% by default or manufacturer value X’d (%) : Transient reactance, 30% by default or manufacturer value X’’ (%) : Subtransient reactance, 20% by default or manufacturer value Neutral & earth electrods resistance : use to calculate the impedance loop Ecodial uses the subtransient... Short circuit power factor : power factor under short circuit  Initial dU (%) : existing voltage drop at the delivery point  Energy supplier : choice between several public utilities (Ecodial adaptation requested) Ecodial uses a specific algorithm that depends on the earthing system SIS - Franck MEGRET - June 2004 - English 3 5 Circuit description Any source (2) Characteristics fields Connection system... generator (400kVA)  Automatically calculates the currents in the different branches of the circuits (ex Total Switchboard feeders = 436.36A)  Ku and Ks coefficients can be used to optimise design  Ecodial will recommend a transformer size Power sum should be run after every modification ! SIS - Franck MEGRET - June 2004 - English 1 6 The Power Sum Calculation / Power Sum  The Power Sum is not compulsory... corrective factor SIS - Franck MEGRET - June 2004 - English 3 2 Circuit description Transformer (4)  Dry transformer (NFC 52 115 - CENELEC HD 538.1 )  Immersed transformer (NFC 52 112 - CENELEC HD 428.1 )  Ecodial interpolates for missing Power values SIS - Franck MEGRET - June 2004 - English 3 3 Circuit description Generators         Power (kVA) : the nominal rating of the transformer It is usually... - Franck MEGRET - June 2004 - English 11 Drawing the network  Click on the symbol you wish to use:  the mouse pointer becomes this symbol  Click on the diagram where you wish to place the circuit  Ecodial verifies if this circuit can be placed there (if there is room, etc…)  Double- click on the circuit, and define :  Name  Characteristics (cable length, polarity, etc…)  Customise (cable → busbar... maximum short-circuit currents for networks supplied only by generator SIS - Franck MEGRET - June 2004 - English 3 4 Circuit description Any source  Un Ph-Ph : a reminder of the system voltage If change, Ecodial will propose to spread down this property downstream  I service connection (A) : Intensity of the connection, in other words the current rating of the upstream protection device (not drawn on... safety criteria An unsafe choice will not be allowed to be validated Equipment calculated - SIS - Franck MEGRET - June 2004 - English equipment is selected automatically No additional entry is required, Ecodial uses default values (installation method, cable type,…) Circuit breakers (and fuses) and isolators Contactors and relays Cable, BTS, and busbar 2 0 SIS - Franck MEGRET - June 2004 - English 2 1 . ‘calculation standards’ ? IEC909, IEC3 63, 4 SIS - Franck MEGRET - June 2004 - English What are ‘installation rules’ ? IEC6 036 4, NFC 15-100, BS7671, CP5, AS3008,  Installation rules address. speed drives, Capacitors  Calculation method : CENELEC (R0064-0 03)  Installation rules : IEC364, C15-100 (ed. 20 03) , BS7671 3 SIS - Franck MEGRET - June 2004 - English  Calculation standards. different branches of the circuits. (ex Total Switchboard feeders = 436 .36 A)  Ku and Ks coefficients can be used to optimise design.  Ecodial will recommend a transformer size. Power sum should be