Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

100kW induction heater with a Siemens RS3020CJ Tube from 1973

Status
Not open for further replies.
CelsoSC

CelsoSC

Electrical
Feb 7, 2021
37
Hello, was asked to take a look at an Induction Heater that it's older than me.
It is a 100kW induction heater with a Siemens RS3020CJ Tube from 1973.

I don't have any background in Thermionic vacuum tube technologies and the few useful pieces of information I found still don't give me insight into how this device works.

How does this Induction Heater start to self-oscillate?
What is the purpose of the transformer (PN#13572) feeding a DC Voltage to the reactances (PN#13283)?
How to be sure that the Tube is defective?

I would be thankful for any help I could have to understand this kind of induction heater.


 
 https://files.engineering.com/getfile.aspx?folder=40139e46-ba0b-41de-aaf6-bbbc44bdb177&file=AEM100KW_2.jpg
Replies continue below

Recommended for you

Sort by date Sort by votes
Hi CelsoSC,

comparing the data you provide with the schematic shows some inconsistencies in regard to power rating and tube used. 100 KW vs. 50 kW and RS3020CJ vs. RS3060CJ.

Nevertheless the question can be answered as follows: The transformer PN#13572 steps up the voltage to several kV to provide anode voltage to the vacuum tube via a rectifer.

However prior to invest in repair of such equipment, I recommend to check if replacment (or rebuilt) tubes are still available.

 
Upvote 0 Downvote
Hi electricuwe,
You are right, I was searching for tube information a saw some RS3020, maybe that's why the reference stayed in my mind.
The induction heater has an RS3060CJ Tube.
I think that the transformer PN#13572 has a 30V secondary and can't be the kV step-up. That is done by transformer PN#14231.


Can it be that the transformer (PN#13572) feeding DC Voltage to the reactances (PN#13283) is a magnetic amplifier?
 
Upvote 0 Downvote
Yes, you are right. Anode voltage is provided by another rectifier. The reactances might a magnetic amplifier /transductor maybe for power control. But I do not see where the output is connected beside the meter.
 
Upvote 0 Downvote
Hi electricuwe, the same line that goes up to the meter is the same that goes down to the reactances.
snapshop1_fnmbpj.jpg
 
Upvote 0 Downvote
So the reactances could be a magnetic amplifier for power control as one of their further connections are going to the main transformer.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

F
vfd WITH INDUCTION MOTOR AS Dyno
Replies
7
Views
3K
Far12312
F
SilverfoxUK
  • Locked
  • Question
UK - ATEX - Heater
Replies
0
Views
237
SilverfoxUK
SilverfoxUK
Imumahdi
  • Question
Feeding A Single-Phase Transformer from two different phases 2
Replies
5
Views
4K
waross
waross
341968
  • Locked
  • Question
Fuel Gas Heater operated by thyristor control panel causing fluctuating on feeder Ampere
Replies
1
Views
2K
davidbeach
davidbeach
J
  • Question
EHV/UHV GIS Expansion from Existing One
Replies
1
Views
2K
Jpascp
J

Part and Inventory Search

Sponsor

Back
Top Bottom