Logic Diagram; Input And Output Signals; Setting Parameters - ABB REL 551-C1*2.5 Technical Reference Manual

4.4
4.5
4.6
Thermal phase overload protection (THOL)

Logic diagram

Θ
THOL_BLOCK
Figure 31: Thermal overload protection, simplified logic diagram

Input and output signals

Table 87: Input signals for the THOL (THOL-) function block
Signal
BLOCK
Path in local HMI: ServiceReport/Functions/ThermOverLoad/FuncOutputs
Table 88: Output signals for the THOL (THOL-) function block
Signal
ALARM
TRIP
START

Setting parameters

Path in local HMI: Settings/Functions/Groupn/ThermOverLoad
50 ms
&
&
Description
Block of the thermal overload function
Description
Alarm signal from the thermal overload function
Trip signal from the thermal overload function (pulse)
Start signal which is reset when the temperature drops below the
resetting level
Chapter 5
Current
THOL_TRIP
THOL_START
THOL_ALARM
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