Help requested with 11kV, 3MW generator. Our generator has just returned from a major overhaul, and we are in the process of recommissioning the set. The setup is that the generator supplies power onto a common busbar in parallel with the DNO supply. We supply site load and export any excess...
I am considering the Druck DPI612-PFX-2G pressure calibrator which has a 2 bar pressure module fitted. This would do the majority of our low range instruments. However, I am not sure if I can get the turndown and resolution to calibrate some very low DP cells. These DP cells are typically of the...
The alternator is about 15 years old has an R449 AVR fitted. Just downloaded the R449 manual as impossible to do in poor phone reception area. Anyway, before I got the manual, I disconnected wires 5 and 6 from E+ and E- terminals and that allowed us to get the no-load speeds completed. We are...
We are in the process of trying to recommission our diesel generator after undergoing mechanical repairs. The recommissioning process requires that we run the generator at sliw speeds for short periods of time off load. Gradually increasing the speed untill we reach full speed 1500 RPM, then...
We have a pretty old circuit breaker in service and it has a protection relay that I am struggling to identify. I think it is an NVD relay, but not sure. It is a MVDT relay and I have attached a photo. Appreciate if anyone can confirm what it is and can send me a user nanual or point me to where...
The pipe size is 700mm diameter. I have used the Tidalflux in a couple of applications already and happy with the results, but that is with steel pipes. Thanks for the info on the grounding rings, looks like we will have to fabricate or buy the rings to suit our application.
We are looking at cutting a concrete sewer pipe and installing a mag flow meter suitable for measuring flow in partially filled pipes. Anyone envisage any problems with installing the flow meter into concrete pipe, and will i need earthing rings?
Below is a better drawing of the system, showing L1 and the neutral. L2 & L3 has been omitted for clarity. I have also added photo 1 which shows the HMI when the generator is at rest. When I disconnect the neutral at B or C, the voltages return to normal as shown in photo...
We have an 400 Volt alternator driven by a CHP and connectect to an 11 KV busbar by way of a step up transformer. This setup has been working fine now for a few years. All of a sudden we are getting strange voltages indicated on the mains side side when the machine is at rest. When we run up the...
Due to the failure of our site standby generator, we have had to install a contingency backup supply on a critical area of our plant. The contingency arrangement comprises two 1250 kVA generators connected in parallel to a 400/690 Volt transformer. The transformer is 690 Volt secondary is...
I have many installed open channel flow meters of the ultrasonic variety, all with flumes. The nature of this install may be better suited to the mag flow meter I described.
I recall some time ago seeing a sales brochure for a plate or pad type mag flow meter. This meter was fixed to the bottom of an open channel and the flow passed over the top. Has anyone used this type of flow meter and can advise on how good they are in terms of accuracy, reliability, etc. Also...
