Slow level PID loop with telemetry delay
Small PLC with 3 Axis Stepper Control
Need a small, reasonably price PLC that can do trapezoidal motion on 3 axes.
Controlling the Speed of Hydro Turbine
Hydro Turbine frequency matching with the grid
Ex'd' Certified Transmitter in Ex'i' loop
What should be the loop electrical certification when an Ex'd' Certified transmitter is connected to an intrinsically safe loop/barrier of PLC/DCS?
Can you drill a Ex d e ib enclosure?
GRP JB EEx E Certification.
I want to enlarge cable entry hole of M25 to M40. Do I require re certification for the same JB?
Connect a Sensor to Laptop
Connecting a sensor to a laptop via USB port
Is a dedicated control system required for anti-surge control of compressor?
Help me in measuring the volume reading in new tank
rigid conduits for explosion proof?
seeking information on appropriate way to isolate electrical cables in an explosive area
calculations for the moment of inertia for a solid cylinder.
After the inverter is synchronized to the grid, what makes the current to flow into the grid?
Working Principle of Vibration sensor
Working principle of 5485C Metrix Velocity sensor.
Generators in Parallel. Power Factor Problems
What trips would occur when generator power factor goes from 0.8 lag to 0.5 lag.
I term in PID controllers
the I term in PID controllers - integral time and/or reset time?
Low Air Flow Confirmation
Looking for sensor to confirm low air flows
Confusion about 20 Micro Joules limit.
Increasing Excitation of an Isolated Alternator Feeding a Resistive Load
Effect of increasing excitation on terminal voltage and load current of an isolated alternator feeding a purely resistive load.
trying to save energy with a VFD on a constant centrifugal fan load.
I want to know about Grid failure situation at power plant.
Stability of Generators in Isochronous Mode
Why are two or more engines (gen sets) in Isochronous mode without load sharing make the system unstable?
Problems Disconnecting Generator from Grid
Posted by Yyyackums on 1 March, 2015 - 7:21 am
Trying to power up a generator head via the grid and then disconnect generator from grid
Separate Instrument Earth Pit
Separate Instrument Earth pit not available
IS Smoke Detector without IS Barrier
Intrinsically safe (IS) smoke detectors installed in a non hazardous area without an IS barrier.
Help needed with a question on process control networks for a interview.
Reactive Power Consumption
What is the effect on the motor of a power factor switch?
Intrinsically Safe Circuits
How to explain why you shouldn't remove the cover of an Ex device.
Different Ways of Calculating Instantaneous Torque From a Servo
Posted by John Alperto on 8 December, 2014 - 7:52 pm
I want to calculate the instantaneous torque from a servo. I was wondering if this can be done using the current draw, or externally using an accelerometer.
Having Trouble With A Simple Pressure Calculation
Generator Synchronization Power Swings
Wild power swings while synchronizing stand-by generator back to the grid.
P&IDs and Process Control Narratives
How are process control ideas shared between different parties within your organization especilly when all parties are not control engineers?