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Hello I have the cable lugs Al-Cu in an installation I would like to know if the attached tool for crimping is okay or if it should be hexagonal. Any insight would be much appreciated...

Hi! We have 400V and 690V MCCs painted RAL7035, several inside an electrical room. New panel is coming for UPS distribution feeds (two or three columns of fuses and MCBs inside) to be installed in the same electrical room, and I wonder if those shall be specified different color. Switchboard...

Hi all, new 2 overhead cranes of 500 meters travel on the same busbar rail needs 900A feeding. the plan is to feed from 3 different points due to voltage drop. Voltage is 400V. we requested single feeding but they state it's technically impossible. what do you think on this? it is like that...

Hi all, we are thinking if there's some insulation monitor for cables. They carry 230Vac, that are for a contact of safety switch in field. The cable construction is with armour. thanks in advance!!!!

Hi all, we are planning to install some ph, magnetic flowmeters and other instruments with powered transmitters, all of them with 230Vac supply for transmitter, this mains 230Vac coming from dedicated UPS switchboard. All of the transmitters have own passive 4-20mA output connected to DCS. The...

hello, we have here small distribution switchgear 33kV, each breaker has it's own relay (Schneider VAMP Relay 255) connected to SCADA by DNP3 over ethernet (10MBps) all vamps goes to standard Cisco switch, ethernet cable is category 6 UTP, no shielding, vamps earth connection checked and so...

Hello! we have here one AC drive (ABB ACS800) that has four (4) motor in parallel. The drive is 16amps and the motors are 0,75kw 1amp 690V each. each output from the drive to the motor has an individual motor protection switch, sized to 1,6Amps the thing is that te motor protection switch are...

hello, I would like to ask if someone was involved in a level control of a *very* large tank or some advice. We have a water treatment plant, very large, and they want to control a very large output tank level automatically with a water pump The water demand may change and this causes problems...

Hello! I'm automation technician and here they want to put to dcs a sludge centrifugue equipment. This thing is a bowl and a screw in the middle, and it has pulley to the bowl in one side and in the other side a planetary "direct drive" gearbox. we have many planetary gearboxes but this I have...

Hello, I was asked to replace a cabinet cooler in a small machine. The installed one is an air vortex cooler, and they want to change to standard electric refrigerating unit. The problem is that the cooling power of the vortex is rather big, so the electric unit would be too big for the...

hello, we have a hot water pump with a 690V 500kW 4 pole squirrel cage induction motor that had many bearing failure apparently as the ones caused by vfd's but strangely it is a DOL motor, without vfd. The thing is that mechanical guys changed the non drive end bearing and installed insocoat...

Hello, we have 3 motor connected in parallel fed by the same variable speed drive, an ABB ACS800, each motor has 3xpt100. From parameters, i can only configure 2 motor supervision, i wonder if someone has any idea how to include 3 motor protection either by DriveAP and trip the vsd or sending...

Hi all, We have Fuel-oil pumping station that is provided with two steam fuel-oil preheaters and one electric preheater. Everithing is on a normal pumping pressure of 12 bar, and the circulation temperature is 120°C, DCS controlled. The electric pre-heater the only protection it has is an...

Hello, There will be temporary maintenance works in special places like metallic tanks or very humid places and our local code demands to fulfill some criteria. It says that the lighting and the tools shall be of 24V or less, or shall have insulating class II (double insulation), or shall be...

Hi, Does anyone know how to access the hidden protection parameters in the ACS800?? thanks!!!

Hi, I have a panel AOP from siemens and it's giving me a message: "AOP requires rebuild" and I can't access parameters. Any hint? Thanks!

Hi all, We found dust spots (dust concentration) in the surface of an insulator (the trafo is under roof), and carbon spots also. I've attached a picture of the insulator there you can see the spots. Is it possible that this can be internal cracking? (the trafo is 1st year in service) The tech...

Does anyone know how this thermistor input works?? I don't understand this NFT (Nominal Functioning Temperature) factor. Also it seems to autodetect if they're 3 or 6 sensors, if I'm correct... Thanks in advance!

Hi all! We have several outdoor motors and the sun radiation makes the surface temp rise up to 50°C and more. I was wondering how it affects on the ambient temperature derating of the motor power. And if there's any table, paper, coefficient, formulae, etc. to consider when it comes to the...

Hi all, In our mill there's 2 transformer in the same tank for electrolysis thyristor rectifier (12 pulses) that uses the same 3 legged core. Does anyone know any advantage/disadvantage about this design (apart from the cost-saving benefit)? Any info/paper? thanks!!