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Hi! I'm working on a application of a VFD for a motor of 40hp @ 440Vac. The client has a 211 amper capacity VFD. Can I use it for a 40hp (50A) 440Vac motor? Is probably to have some Harmonics issues due that high of over-size?

Hi, We're doing a commissioning procedure over a 150kW (460Vac) conveyor. This motor have a VFD. During the start (without load)we note an overvoltage on the 460Vac MCC that feeds the VFD. It could be a problem on the transformer? or some kind of harmonics distortion that is causing this effect?

Hi, after some overvoltages trips on a VFD our client did some measurements on the LV MCC bar and found a high level of current harmonic distortion. It could cause the overvoltage on this VFD and other components? Note: No voltage harmonic distortion was found. Thanks!

Hi, I`m looking for user experience on AVEVA Electrical, I`m very interested to purchase it, but I didn`t found enough information about its capabilities, does somebody already use it?

Hi, I`m looking to find some new software to help on the electrical dimensions issues that are the main concerns during a tight schedule projects. On a ideal project, electric design starts after the main mechanical project detailing is done, I mean, all the motors are defined, also the...

Hi, I`m working on a 4.16/0.48kV 500kVA transformer specification. Who defines the impedance for it? exist an IEC standard for this?

Hi, I need to calculate the BIL for a transformer that will work at 3000 meters over sea level. According the tension class for this transformer the BIL at sea level is 250kV, how can I calculate the BIL at 3000 m?

Hi, we're detailing the electrical installation for a large underground mine. One of our equipments on our scope of supply is a 4.5MW 34.5kV to 4.16kV transformer. This trafo is already done on ABB's shop and was fabricated with a BIL = 200kV. Our client is asking to change the BIL to 250kV...

Hi, Is possible to determine how could be the voltage drop during a start of a 550kW motor (crusher) by a MV VFD (AFE)?

Hi, I'm working with the communication between a ACS880 drive. I have a motor with winding and bearings RTDs that I have to wire up its drive (ACS880) I have 2 doubts: 1) How can I configure the motor temperatures protections in order to trip the drive when they reach a predefined value. 2)...

Hi, I'm working on a conveyor belt specification where the client is asking to use a softstarter for its motor. Even a softstarter have the option to set 2 starts mode; 1 with low load and 1 full load, I'm not sure if working with the full load start mode will stress the mechanical components...

I have a doubt about the ACS880-37 ABB drive. Is this drive an Active Front End?

Hi, I have the following doubt: My client wants to record the power consumption in KW/Hr. I can take the power measurement from the relay in Kw, how I can use this value to get the Kw/Hr consumption? Thanks

I have the following question, I have a conveyor feeder with a 10 HP motor drived by a VFD that was projected to work in a nominal speed (50Hz output for VFD) since that we have a 60Hz power supply line, I can also drive the motor to maximun speed (60Hz). But the client wants to drive the motor...

Hi, I´m looking for a 4-20mA to Foudation Fieldbus protocol converter, I know that exists temperature, pressure, flow, etc transmitters that have a fielbus output, but I want to know where I can find a kind of converter that I can put inside a panel so that I can run my 4-20mA or pt100 signals...

Hi, I´m trying to find some theory information about S.E.R. (slip energy recovery) drives, basically how this kind of drive can drive a motor above of the synchronous speed, if somebody can tell me where I can get this information or know well this kind of drive I will be grateful

Hi, I would like to know how can I get the software to edit a s7-200 siemens code program, I have to open a code for a dedicated plc system, and them add it on a s7-300 dcs supervisory system, I know that is more easy to get the functional documentation of this machine and add all my I/o points...

Hi, I´m trying to find some information of wound motors, typically all the diferents between wound, ring motors and syncronous motors thanks

Hi, I´d like to know about the use of trafo´s for differential current protection, I´m working with a 6600 HP @ 6000KV AC 3 phase-60hz ring motor and it have one 100:5A trafo in each power supply line as a differential current protection, my question is, why I have to use this 100:5A trafo since...

Hi, I´m working with motor commissioning, my doubt is: when I measure the phase-current of a 3 phase assincronous motor, I got differences in order of 2% between the value of current of one phase and other, when can I say that the system is unbalanced, and which are the risks that I have working...