Question 1

What is the difference between In-line and Inside Delta Soft Starter Circuits?

Accepted Answer

The Altistart 48 connected in the motor supply lineThe motor connection depends on the supply voltage, which in this example is a star connection.The motor connection depends on the supply voltage, which in this example is a delta connection.The Altistart 48 connected in the motor delta windingATS48***Q or ATS48***YS316 starters connected to motors with delta connections can be inserted in series in the motor windings. They are powered by a current which is less than the line current by a factor of SQRT 3, which enables a starter with a lower rating to be used.

Question 2

2D CAD Drawings for LV Detuned Reactors

Accepted Answer

Please refer the below table for cross-reference of drawing number & reactor rating.Drawing Number RatingS1B1002205 6.5 to 15kvarS1B1002207 25 to 30kvarS1B1002209 45 to 50kvarS1B1002211 75 to 100kvar

Question 3

How to to unlock the drive using master reset password for ATV310 ?

Accepted Answer

1.Go to the 999. Press Enter. ON will be displayed ( meaning drive is password protected and hence access to FULL menu and factory reset is not permissible)2.Rotate jog dial clockwise and set value 26633.Press Enter. Display will automatically change to 9994.Press Enter again on 999. Display still shows 9995.Rotate jog dial anticlockwise till OFF. Upon OFF displayed, press Enter again .This completes the unlocking of drive from password protection..

Question 4

Powerlogic Scada/PowerSCADA Expert/PowerSCADA Operation System Integrator's Manuals

Accepted Answer

IssueThis documentation can be useful when commissioning/troubleshooting Powerlogic Scada/PowerSCADA Expert/Power SCADA OperationProduct LinePowerlogic Scada 7.10Powerlogic Scada 7.20PowerSCADA Expert 7.30PowerSCADA Expert 7.40PowerSCADA Expert 8.0PowerSCADA Expert 8.1PowerSCADA Expert 8.2Power SCADA Operation 9.0Power SCADA Operation 2020EnvironmentCitect ExplorerProject EditorGraphics BuilderCauseIt may be necessary to reference documentation when troubleshooting/configuring the Scada software. ResolutionAttached are the System Integrator's Manuals starting at Powerlogic Scada 7.10 through PowerSCADA Expert 8.2 and Power SCADA Operation 9.0Latest version of Power SCADA Operation 2020 System Guide can be downloaded from - https://ecobuilding.schneider-electric.com/search#documentUUID/3aa7142e-2e4a-414f-80ed-794731a22940/Power%20SCADA%20Operation%202020%20System%20GuideNote the file name was changed to PowerSCADA Expert 8.2 Help Manual in PowerSCADA Expert 8.2 and to Power SCADA Operation System Guide 9.0 in Power SCADA Operation 9.0.

Question 5

Can we control circuit breaker through wifi?

Accepted Answer

We can only control On and OFF through isc (which is connected to router Which has wifi )please check more information through the link belowhttps://www.se.com/ww/en/product-range/62072-enerlin-x-com-x/

Question 6

How to perform a factory reset on SmartX IP Controller devices?

Accepted Answer

Issue: Steps for SmartX IP controller devices (MP-C, MP-V, IP-IO, RP-C). Product Line: EcoStruxure Building Operation, SmartX IP controller devices Resolution: In WorkStation, if your SmartX IP controller device seems completely unresponsive, perform a factory reset to restore the device to a state where it can be successfully commissioned. After you release the reset button, a factory reset may take up to 30 seconds to process. All diagnostic logs and the database are erased during a factory reset. By contrast, controller firmware does not revert and remains at the same active level. To perform a factory reset using the hardware reset button, press and hold the reset button for 20 to 29 seconds. If MP-C or IP-IO is equipped with the MP-C Display add-on module, a count-up timer and progress bar are displayed to assist in reset selection. There is also a reset mode indicator that lets you know which reset occurs if you release at that time. The below figures show the location of the reset button on different SmartX controller devices: Note: From EcoStruxure Building Operation v3.1+, there is a facility to remotely Factory Reset a SmartX IP Controller device, check below KB article for more information: https://community.exchange.se.com/t5/Building-Automation-Knowledge/Remote-Factory-Reset-of-SmartX-IP-controller-MPX-RPC-IPIO/ta-p/195345

Question 7

PowerLogic PM5000 Series (PM51xx, PM53xx, PM55xx, PM56xx) Modbus Register List

Accepted Answer

IssueRegister list for Modbus communication Product LinePM5110, PM5330, PM5340, PM5560, PM5563, PM56xx, PM57xx EnvironmentPower Meter Communications Modbus Register List CausePM5000 series register list is needed for Modbus communication ResolutionSee the attached documents for Register List. There are 2 files. One for the PM5100 and PM5300 series and the other file is for the PM5500, PM5600, and the PM5700 series.

Question 8

what is the Installation guide for RCCB for 3P without neutral ?

Accepted Answer

Please refer the attached document connection in 3P RCCB.You can follow the same document for connection in three-Phase without neutral.>> If you are using Acti9 range RCCB, You don't need to add the resistor with iID Acti9 RCCB. You can directly connect the 3 phase on 3 poles of RCCB (without neutral).>> If you are using the Multi9 ID range RCCB, we need to add a resistance with specific resistance values to be compliant with 380-415V. Please refer the attached sheet for connection & resistance values to e used with multi9 range of RCCB.The devices have a toroid which gets energized on out of balance currents and trips .The toroid does not care if there is 2 or 3 or 4 lines connected to it as far as out of balance current is concerned.If there is 3 phases + N then all the phases and N conductors will vector sum to zero - unless there is out of balance current = trip if exceeding the threshold..If there is 3 phases and No N conductor - then exactly the same applies = sum of the 3 currents = zero or you have a trip condition if the out of balance current is greater than the threshold.We can get by without having a N conductor connected to the RCCB as below - because the test button creates a resistive load outside the toroid at rated voltage to test trip the device.

Question 9

What is meant by Symmetrical and Asymmetrical breaking currents?

Accepted Answer

issue:Customer wants to know the value of the symmetrical and asymmetrical breaking current of the circuit breaker and what do they mean.Environment:Circuit Breaker Resolution:- Symmetrical breaking current is the RMS value of AC component of short circuit current at the instant of separation of the contacts. It does not take into account the DC offset.- Asymmetrical breaking current is is the RMS value of the combined sum of the DC and AC components of the short circuit current at the instant of separation of the breaker contacts. This DC offset is of decaying nature which is dictated by the time constant of the system. As shown in the above picture the DC offset decays in a few cycles and is left only with the symmetrical component. Hence if a breaker has to close before the DC component decays, then the breaker’s breaking capacity is to be calculated for the asymmetrical current at the time of breaking.

Question 10

What is the selection criterion of Circuit Breakers for the Capacitor bank application.

Accepted Answer

The selection should be done after derating the Circuit Breaker taking into consideration voltage variation and capacitors tolerances that could increase nominal current up to 1.5In. The Derating factor of 1.5In Where In = Q/ ( Square root of 3 ) Un Q = Capacitor Power Un = Nominal Voltage Choose the Micrologic with delay time selection, so that the Circuit Breaker does not trip due to initial high inrush current. Also to be taken into account are the parameters like supply frequency, operating voltage & harmonics level of the power system for such application. Refer the attached sheet for further details for selection of Circuit Breaker for Capacitor duty application. Note: Use the phase barrier between the phases in Circuit Breaker to prevent flashover due to heavy inrush current.

Question 11

In a 3 phase system, why does the meter still show voltage reading on one of the phases even after breaking the phase circuit?

Accepted Answer

Issue:Testing phase loss on a meter doesn't result in a null voltage reading.Environmnet:EasyLogic Series Power MetersPowerLogic Series Power MetersResolution:The voltage seen is what we call "phantom voltage", its a known phenomenon with all high impedance power meters. These phantom voltages are normal artifacts of the design and should not pose any safety concerns to the end user.In some cases it'll probably disappear by power cycling the meter. Most power meters are not designed to monitor phase loss, as it'll always assume the presence of the 3 phases and the neutral, depending on your parameters setup. External devices are used to detect such occurrences, like phase control relays.

Question 12

Why is Neutral and Earth (Ground) Connection forbidden Downstream from Main Panel?

Accepted Answer

The question is often asked what is the maximum voltage permitted between the Neutral and Earth (Ground) conductor and if the Neutral and Earth can be bridged to achieve a zero value.This can be a difficult topic, in fact in many cases it can be dangerous. As you will see from the attached document, there are many reasons why it is not allowed.

Question 13

Which RL(lead resistance from CT to relay) is to be used in Knee Voltage calculation if Current Transformers (CTs) used in High Impedance Restricted Earth Fault are at different distances from relay?

Accepted Answer

Issue:Having two different values for RL ( Lead resistance from the CT to the relay); RL from the phase CT to the relay and RL from the neutral point CT to the relayEnvironment:Protection Function ANSI 64refHigh impedance differentialSepam 80 Current Transformer requirementResolution:In any application where the high impedance differential is used, all the CTs must have the following:- the same ratio,- the same magnetizing curve (same minimum Vk),- the same maximum Rct (current Transformer secondary winding resistance),- if the relevant CTs are not at the same distance from the relay, take the maximum RL.Attached Cahier Technique no.194 for more information about high impedance calculation

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