ABB REL 551-C1*2.5 - Logic Diagram; Input and Output Signals; Setting Parameters

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Thermal phase overload protection (THOL) Chapter 5
Current
4.4 Logic diagram
Figure 31: Thermal overload protection, simplified logic diagram
4.5 Input and output signals
Table 87: Input signals for the THOL (THOL-) function block
Path in local HMI: ServiceReport/Functions/ThermOverLoad/FuncOutputs
Table 88: Output signals for the THOL (THOL-) function block
4.6 Setting parameters
Path in local HMI: Settings/Functions/Groupn/ThermOverLoad
en01000085.vsd
I
L
2
&
THOL_BLOCK
&
50 ms
THOL_START
THOL_TRIP
THOL_ALARM
Θ
MAX
I
L
1
I
L
3
Signal Description
BLOCK Block of the thermal overload function
Signal Description
ALARM Alarm signal from the thermal overload function
TRIP Trip signal from the thermal overload function (pulse)
START Start signal which is reset when the temperature drops below the
resetting level