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This is a finite element analysis tool for various applications. In power we get the voltage (stress) distribution in equipment like cables, bends in cables etc including stator winding of generators.
Humidity plays important part in flashover. We faced a problem of flashovers in Air insulated 11kV Switchgear busbar compartments in rainy seasons. Any sharp edge will ionize the surrounding air, which becomes conductive to high voltage discharge. Moisture will hasten the process of discharge. During HV test also this aspect should be kept in mind.
DCS distributed control system: you can control the system within a certain given facility from different locations, either control room or other places, and you should keep in mind this facility could be a in several locations but yet, hard-wired interconnected. while RTU (remote Terminal Unit): you can control the system remotely through internet or a secure satellite connection which in not recommended for sensitive operations/process but it is ok for stand alone and not crucial systems. and more.
Before you select kind of cable for your consumer, you need to calculate expected operating current of cable which depends from rated power of your consumer. After that, before you select kind of cable for your consumer, you need to check size of cable which needs to satisfy next conditions:
Dell D630 - it is the best laptop for field use I have used. And for some applications standard RS232 port is a must. We have Freja 300 test set which totally refuses to communicate with PC via widely available cheap USB-to-serial adapters. The only usable adapter I have found is semi-industrial type, costing about 50 Euro. Not that a price is so much concern, but it is not very convenient to deal with additional boxes, power supply units for them, etc. when commissioning at field.
Overcurrent protection uses as back-up protection for protection generators from faults between two windings of stator (two phases of stator). Setting of overcurrent protection depends from two settings: current setting of relay protection and time setting of relay protection.
In bushing insulation test there are three major current elements which any of those could affect the test result. These current elements are Capacitive current, leakage current and creepage current. In Tan Delta or power factor test the affective current element to the test is called creepage current which needs to be filtered.
I am trying to develop a controller for switched reluctance motor which minimizes torque ripple. My design is acquiring torque ripple information from speed signal. In simulation a high pass filter for speed gives me good ripple information. But in experiments I am using a 500 PPR optical absolute encoder to get the position and then calculate the speed using microcontroller (dspace) capture module. But the filtered speed signal does not provide much ripple information.
If referring to the acoustic noise generated at or around the PWM frequency of the inverter, then you may notice a very slight difference between "BLDC" and an induction motor. Assume that it's referring to a surface permanent magnet machine for the BLDC and a squirrel cage induction machine. The SPM machine has laminations in the stator that will generate audible noise at a frequency consistent with the inverter's PWM frequency.
A lighting control panel will have mostly single-pole breakers with phase-to-neutral branch circuits feeding lighting circuitry. There is the added possibility of having either 'smart' breakers or integral contactors included on the branch circuits to allow for a control means for area lighting beyond local control of an individual fixture/small group of fixtures, such as an office or conference room.
PLC is defined as Programmable Logic Controller. It is a hardware, Includes processor, I/P & O/P Modules, Counters, Function Blocks, Timers,,, etc. The I/Os are either Analogue or Digitals or both. PLC can be configured to suit the application and to programmed in a logic manner by using one of the programing language such as Statement List, Ladder Diagram,, etc
I want to know just what the surge impedance loading (SIL) is but its relevance towards the improvement of stability and reliability of a power network especially an already existing one with various degrees of low voltages and overload situations?
Gozuk Service Gozuk Blog: all about electric motor control & drives industries development in energy saving applications.


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