3BHB004027R0101 GVC700AE01 ABB Controller module main control board circuit board

Description

ParSet 4..1
Parameter for determining in which set of parameters a particular function is active (see Section 5.11.).
Trip 01-08
defines the tripping channel activated by the tripping O/P of
the function (matrix tripping logic).
Trip 09-16
corresponds to Trip 01-08 (providing tripping unit fitted).
Trip 17-24
corresponds to Trip 01-08 (providing tripping unit fitted).
Trip 25-32
corresponds to Trip 01-08 (providing tripping unit fitted).
Theta-Begin
Initial temperature rise.
This is the temperature rise from which the protection starts
after it has been initialised, i.e. after switching on or after
saving new parameter settings.
A setting of 100 % is recommended for a unit, which is already warm; a setting of 0 % is recommended for a unit
starting at room temperature in order to obtain the maximum
utilisation during the start-up period.
Theta-Warn
temperature at which an alarm is initiated.
Theta-Trip
temperature at which a trip is initiated.
Temp.-Coeff.
temperature coefficient “a” for taking account of the increased
resistance of the conductor due to the temperature rise
caused by the flow of current.
The temperature rise is derived from the dissipated power,
which is proportional to the resistance R of the conductor:
R = R0 (1 + a
T).
where T is the temperature rise referred to the rated value
and R0 is the resistance at zero temperature rise, i.e. at room
temperature.
Normally, a setting of a = 0 models the thermal behaviour
sufficiently well.