We are planning to replace one of our standby generators (4.5MW, diesel engine driven) and a consultant has proposed that we replace the single generator with two smaller manchines (2.5MW) which could be supplied as two portable units; then we can easily send them back to a manufacturers service...
That's quite a general question. Canada shares the North American 60Hz frequency and voltage levels are 120/240/208/600/4160/6900/13800VAC with limited use of 480V.
Grounding can be solid or through a grounding resistor depending on fault levels and protection schemes.
If you are still looking for a solvent that will leave no residue on electrical components then google PF solvents. We use PF to clean and wipe down ceramic insulators.
The barriers are made of an insulating material such as fibreglass, mica, ect. They provide a higher resistivity per inch than air, therefore conductors may be placed closer together.
The material would be decided upon based on its electrical properties and the amount of room available between...
If your firm does a lot of lighting design, then you should have a copy of the IES (Illuminating Engineering Society) handbook. Many of the lighting manufacturers have small workbooks that you can use for simple designs.
I am performing some preliminary engineering to upgrade our 20+ year Westinghouse DHP and DH switchgear breakers with new replacement breakers. Does anyone have any experiences upgrading switchgear breakers or any good tips or lessons learned that I can take advantage of?
The replacement...
We have a simular set-up at our plant. Our 9000Hp motors take a considerable amount of time to run-up and the overcurrent relays could not be calibrated to allow for the extended, high current, start time. So, the motors were designed with a speed sensor and the initial motor start is...
If this is an induction motor then the task is simple: Remove one endbell and the rotor will slide right out. End bearings will be shrunk on either end of the shaft.
You can buy resistive load banks that have a number of resistors that can be switched in to create the desired amount of load. In one case we simply wired our 120V inverter to a distribution panel and connected that to a number of ceramic heaters to serve as a 100A total load. That was a cheap...
There is no reason to suspect a problem. The master copy PROMs were fully validated when they were created, which was a long and costly test, but now the test equipment is more than 25 years old.
We can validate the checksum and perform functional testing but I would not be following any known...
Are there any standards which detail validation testing for cloned PROMs?
We have master PROMs, which were validated when they were created. We are going to create a number of clones and read their checksum to validate that they were copied correctly. Are there any standards which require more...
In eastern Canada we have gone to SF6, switchyard breakers for all new and replacement equipment. We have standardized with ABB breakers but we have also used GE and Mitsubishi.
The existing controller is old and no longer available, so if we get a failure then we will be scrambling to get a replacement. Our Parshall fume is sized for a very large storm and the resolution of the ultrasonic flow measurement is poor for low volumes of water.
The largest problem with...
I need to upgrade our rainwater run-off flow measurement and sampling equipment, at a fuel storage site. We currently use an ultrasonic flow measurement device with a Parshall flume and added a sample pump to take samples every 1000 gallons. Its a homemade arrangement that never worked very...
