ABB REM620 Thermal Overload Function Test Reset Problem
ABB REM620 Thermal Overload Function Test Reset Problem
(OP)
Hi friends ,
I m relay engineer. I m at substation now. During testing thermal overload test , I couldnt reset the thermal degree...Waiting to be zero ( degree) takes much time .
I disabled the function but still same..I just want to test from zero.
Rated Current : 1,00
Initial thermal val : 74 %
Setting Group 1 :
Overload Factor : 1,05
Alarm thermal value : 85 %
Restart thermal value : 40 %
Negative Seq Factor : 0
Weighting factor : 50 %
Time constant normal : 320 s
Time constant start : 320 s
Time constant stop : 500 s
Env temperature mode : FLC only
Env tepmperature Set : 40 C
Thanks






RE: ABB REM620 Thermal Overload Function Test Reset Problem
set value. The calculated temperature can be reset to its initial value (the Initial
temperature setting) via a control parameter that is located under the clear menu. This
is useful during testing when secondary injected current has given a calculated false
temperature level.
So, first you need to change your "Initial thermal val" setting to 0 and save. Then you need to push the clear button on the relay, scroll down to the proper setting and clear it.
https://library.e.abb.com/public/3fed1ac90f340a76c...
RE: ABB REM620 Thermal Overload Function Test Reset Problem
I read the manual ..I think I coulndt see that point.
Again thanks much :)
RE: ABB REM620 Thermal Overload Function Test Reset Problem
toperate= -T . In [( Qfinal-Qoperate)/(Qfinal/Qn)]
Is it possible to use that calculation for my function ( MPTTR ) ? And dont understand ( Qfinal and Qn )
IF isnt , do you know the calculation ?
Thanks
RE: ABB REM620 Thermal Overload Function Test Reset Problem
I don't have an answer to that one. Hopefully someone else can chime in.
Thanks.
RE: ABB REM620 Thermal Overload Function Test Reset Problem
Hope it is help
https://www.dropbox.com/s/h6h9ksea4for386/MPTTR.ra...