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Thermal overload protection (THOL)
8.
Activate the THOL-BLOCK binary input.
The signals THOL-ALARM, THOL-START and THOL-TRIP
should disappear.
9.
Reset the THOL-BLOCK binary input.
10. Check the reset limit (TdReset).
Measure the signal THOL-START until it disappears on the corre-
sponding binary output or on the local HMI unit, take the "T Line"
readings and compare with the setting of TdReset.
11. Compare the measured trip time with the setting according to
the formula.
12. Reset the thermal memory.
13. Continue to test another function or complete the test by set-
ting the test mode to off.
Chapter 11
Verifying settings by secondary
injection
97
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