Hi all
We have noted a surface partial discharge on dry resin 20kv/6.6kv 1.5MVA transformer,please see pictures
The only available test for me are insulation resistance test ,high pot and ratio test by cbc100.
IR 200Mohm PI 2.5
My question are:
How serious their conditions are?can it be kept...
Hi every one
A heat treatment machine (pro heat 35) works with power supply 470v/575v..please see attachment
What options I have to make this machine works on 380v power supply
We’ve just completed a bearing replacement for a 4-pole, 50 Hz, 2 MVA synchronous generator. Before full commissioning, we urgently need clarification on the following points:
Minimum Speed for Voltage Generation:
What is the minimum rotor speed at which we can expect the generator to...
We are currently assessing the condition of a three-phase 2.5 kVA, 400V emergency generator, which is used for black start only. During our routine checks, we observed the following insulation resistance values:
• Initial readings (before cleaning):
• Phase to ground (IR): as low...
Dear experts,
I’m working in Generator protection panel that equipped with several ALSTOM relay:
MX3AMD20A
MX3DPG3A
MX3IPG1A
MX3IPG2A
We need to connect these relays with PC to uploads and downloads the configuration files rather than doing it manually.
Iam trying to find what is the PC...
Hi everybody
A 1800kw electrical motor running with normal temperature and current but with a humming noise.CBM team saying that no vibration has detected because of bearings or a mechanical issue, however the vibration specturm analysis shows frequency of 100hz beside the Ffund 50hz .We are...
The Transformer feeders in our plant are running by Sepam T40s at both primary and secondary sides.
During the last 8 years we encountered issues that happened quite several times ,in which the Sepam of Primary record an external trip and open its SWG..
This configured external trip input is...
Is there any method to detect failure in the rotor of a 200 kW motor that produces a humming noise? In a previous experience, a similar motor exhibited a similar noise, and upon disassembly, we found that its rotor had elimination gaps.
I am wondering which technique could help determine...
50kva transformer supplying battery charger system start making a loud humming sound with load and. With noloaf ,transformer insulation resistance is high,but when using scope meter,output currents was distorting any help
Wave form...
Hello experts
DC UPS system supplied with 50KVA transformer , Recently Transformer humming (noise ) became up-normal . this start happened in different UPS system in our site.
humming Transformer was replace with new Transformer but the sound still high.
-Transformer output AC waveform was ...
