gojkosisa
Junior Member level 3
Hello,
I'm working in company which produce boilers on the pellet as an electrical engineer. For burning the pellet I use a heater and control circuit is simple: relay controlled by MCU over transistor. My company produce about 1000 boilers per year and company exists about 5 years. At the beginning of production instead of relay Triac was used for heater control but there were a lot of issues so we switched to relay control circuit. This was about 3 years ago. Now, with this control circuit every year we have a progress of broken heaters. We have tried with changing heaters, with better quality heater and this extend heater life but again issue is still there. I'm thinking that the problem is with relay and control circuit. Please check this link (a datasheet of relay):
https://www.schukat.com/schukat/schukat_cms_en.nsf/inde/FrameView?OpenDocument&art=RT424-12&wg=E6371 .
Power of heater is 900 [W].
Heater is switched ON only in the process of ignition, MCU switch transistor (relay) ON and after ignition finished (max 10min) MCU switch transistor OFF. In the winter time relay is switched ON/OFF about 15-20 times per day(max).
Could be problem with control circuit? If someone had a similar behavior please give me some advice.
Best regards.
Edit: I make post in wrong forum section .
I'm working in company which produce boilers on the pellet as an electrical engineer. For burning the pellet I use a heater and control circuit is simple: relay controlled by MCU over transistor. My company produce about 1000 boilers per year and company exists about 5 years. At the beginning of production instead of relay Triac was used for heater control but there were a lot of issues so we switched to relay control circuit. This was about 3 years ago. Now, with this control circuit every year we have a progress of broken heaters. We have tried with changing heaters, with better quality heater and this extend heater life but again issue is still there. I'm thinking that the problem is with relay and control circuit. Please check this link (a datasheet of relay):
https://www.schukat.com/schukat/schukat_cms_en.nsf/inde/FrameView?OpenDocument&art=RT424-12&wg=E6371 .
Power of heater is 900 [W].
Heater is switched ON only in the process of ignition, MCU switch transistor (relay) ON and after ignition finished (max 10min) MCU switch transistor OFF. In the winter time relay is switched ON/OFF about 15-20 times per day(max).
Could be problem with control circuit? If someone had a similar behavior please give me some advice.
Best regards.
Edit: I make post in wrong forum section .