Search results for query: *

Hi to all. I have noticed some tripping of a Danfoss inverter VLT5000 with alarm 14 EARTH FAULT. After recycling the power and resetting the inverter it resumes normal operation. Is there any logical explanation for this ? Earth fault is a short circuit between phase and earth and is something...

Hello to all. i am new to this forum and i want to ask for your help to the following. i want to know which are the maximum allowed operating temperatures ( or temperature rises) in conductive materials like busbars, cables, contactors, circuit breakers, terminals, cable joints etc. I find this...

I have install a system for the combined measurement of pH and ORP(redox) in a starch slurry tank. The electrode is Mettler Toledo 3250SG and it is cleaned periodically. Unlikely i have noticed a permanene deviation of pH measurement (sensor 2,95, laboratory measurement 3,3). Which are the...

Hello I have to install flowmeters in PPE pipes for measuring the flow of HCl(hydrochloric acid) 35%. Should i install the grounding rings as the manufacturer suggest? And also what is the straight unimpeded run at the inlet of the flow sensor? The manufacturer suggest 5xD (sensor diameter)...

Hello I want to connect a load cell transmitter to a Simens S7-300 CPU in order to collect more accurate data and have the totalizer in my PLC code and not done by the weighing transmitter itselff. How can this be relaised ? Of course i will need serial cable and progrmming. Is there any...

Hi guys I am working on a thermpographic survey of my plant and i want to find the highest temperature limits in which an electrical equipment, like a circuit breaker or a fuse switch disconnector can work. The manufacturers state always the ambient temperature, not the working themperature of...

Hello I want to create a library with ATEX directives for the process lines of the industry where i work. Can you tell me for some resources in the web where i could find useful data ? Thanks in advance for your time.

Hello to all. I have a star-delta starter for a 37kW motor(400V,50Hz) and i want to connect the 30kVar capacitors to the circuit. What is the best connection scheme that i should use ? I want also to use a capacitor contactor. Thank you very much for your time.

Hello. I have installed a Intrac mechanism for a combined pH/redox electrode with automated cleaning system. I have checked that after cleaning the pH reading is coming to its normal value after 1 minute but for the redox(ORP) reading there is always an offset of +40 mV. The temperature before...

Hi . I want to make a study about the temperature effect on switchboards. I ahve found enough docs on internet except from one subject : the temperature of the main contacts of a contactor or a circuit breaker. In all the documentation i have seen specifications for the ambient temperature but...

Hi guys. I have an inverter Midimaster Vector (Siemens). After start-up we have periodically trips with code F001. There is not a problem in the load. I have chosen operating mode P077=1 and the ramp-down time is 12 sec. Can you tell me your opinion ? Thanks in advance for your time.

Hi there. I am ruuning a project for the replacement of switch disconnectors Rittal type SV3401 and SV3410 with magnetic breakers that should have the following features : 1) Theu must mount on thre-phase bars distance 60mm 2) They must be capable of receiving padlocks We want this...

Hi there. I am ruuning a project for the replacement of switch disconnectors Rittal type SV3401 and Szv3410 with magnetic breakers that should have the following features : 1) Theu must mount on thre-phase bars distance 60mm 2) They must be capable of receiving padlocks We want this...

Hello there. I want to install a manual 3-way valve in the outlet of a dosing pump Prominent Beta and connect polypropylene piping 6/4 mm. I want this in order to select manually in which place the pump will send hyper acid. Can ypu suggest any manufacturer for this kind of 3-way valves ? Thank...

Hi to all. I want to make some changes in MCC in order to make them water-proof and ensure inside protection IP20 and use padlocks in automatic circuit breakers. I use circuit breakers SIEMENS 3RV1 series. Can you give some help ?

Hi there . I was wondering if you can help me with the connection of signal 4-20 MA output from a KROHNE IFC 020 flow transmitter to an analog input card of PLC because i beleieve that the wiring diagramm in KROHNE manual is wrong. The analog input should be treated as 4-wire. Thank you very...

Hi there. I am running a project which involves the installation of one PROMINENT DOSING PUMP type BT4a (Beta Solenoid Diaphragm Dosing pump). I search in the OEM site and i beleive that this type of pump cannot run with an external signal of 4-20 mA. Can you confirm this ?

Hello. I have a Midimaster Vector Siemens inverter. I have noticed that when the inverter is stopped the frequency setpoint does not alternate with the actual output frequency as it is described in the manual. Is it something that can be done ti fix this?

Hello to all. I want to ask what would be the result of setting the motor nominal rpm to 1000 instead of 1500 rpm in an inverter. This happened to my site and i noticed a great amount of armonics from this inverter. Can this be the reason ?

Hello all. I want to ask if i can mix single-ended and differential analog input signals in one Control Logix analog input card. When i tried to do this in an SLC analog input card i had very much noise that dissapeared when disconnecting the differential inputs. Thanks in advance fro your time.