Sorry all I was out of country on a business trip and was not able to see your valuable input.
The cable is 3 core armored manufactured in 1961, 5/phase and length around 800 meters. It is laid in a bed of sweet sand direct buried and well protected.
H1H2N3F4
Helo every one:
We have around 500m cable that are connecting and backing up ( during maintenance or interruptions) two 4.16 KV systems. This is a BILCA cable that is rated for 5KV and always energized from one side and open in the other side. It is rarely used, however it fails many times in...
What cause the substation battery to dry out & what is the impact of adding too much water frequently on the battery life and condition.
I have to add water almost every two weeks.
H1H2N3F4
Thank you all for your valuable comments and analysis.
We have formulated a team to investigate this problem. We are intending to involve the manufacturer and designer in this task and will get back to you when we come to a conclusion.
I am still looking for your valuable input in this if you...
Gianoli; as you said the bushings or the flexible jumper between the bushing and the bus bars could be under sized. But, what is interesting is that the heat is observed on the side of the bushings and not on the bus bar side.
I will check the specification of the bushing; hopefully I have...
Utilizing the Infrared camera with transformer energized and coveres off is a risky task at least for us with limitation on our maintenance staff.
To clarify, I meant by overload, not on the transformer itself but on this type of bushings. As I said previously, we have two transformers; each is...
Thank you all for you valuable replies.
To answer Gianoli, the use of the infrared camera will not give us any clear indication since the secondary side of the transformers encased in a steel box. But I think as was said with the rest of the group ( magoo2, ScottyUK & Marmite), It is an...
Good morning all.
We have a double ended switchgear that is rated for 3000A. This switchgear is supplying power to four ( 4) Gas compressors ( 20,500 hp each) and are continuously running. In addition, this switchgear is being supplied by two 60/80MVA, 69kv/13.8kv Bruch type transformers. My...
Thank you all and I appreciate your time and advice;
I think I understand now that I can use three Identical Transformers (luckily they are available) to feed my non motor loads.
To answer, steelerfan28655,
No my load will not be constant.
I already considered the de-rating factors during my...
Hi every one;
I am a new engineer and I have a question to the group;
I have a small project where we need a three phase 225 KVA transformer.
This transformer size is not available in our yard and the installation is urgent. A friend of mine advised me to use three single phase 75 KVA...
We are just trying to apply thermography in a wide range in our company.
I have a view questions:
1- Is their one camera in the market (low price) that can be used to serve all applications in the electrical equipment inspection?
2- Do we have to develop a data base to build our history on those...
I have a primary transformer that is a 1500 KVA, 69KV/13.8KV.
This transformer is supplying power to different loads total of ( 680 KVA).
A request for more power from this transformer was processed with the following specification:
Connected load is 1000KVA and the estimated total Demand...
I am reviewing a project where the design contractor is intending to parallel a 30MVA , delta-Y transformer with a 30 MVA Y-delta transformer.
I think that this can't be done because of the difference in the angular displacement between the two transformer windings.
He insisted that this can...
