AEG THYRO-A, Operating Instructions Manual

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3.9 Monitoring
Power controller and load circuit are monitored for malfunctions.
Messages are sent via LED (see page 29, LED messages), by bus or
by fault signalling relay K1 (see page 31, Fault signalling relay K1).
3.9.1 Monitoring the mains voltage
NOTE
Limit values for voltage monitoring
The following limit values apply for voltage monitoring:
- Undervoltage monitoring: -57% of type voltage
- Overvoltage monitoring: +10% of type voltage
This results in absolute limit values for the monitoring of the mains
voltage.
Tab. 3 Limit values for mains voltage monitoring
Only for ...H RL1 and ...H RLP1
In the event of more than 15% below the type voltage, the devices
can only be operated right up to the undervoltage limit if the electro-
nics are supplied from an external 24V source.
For ...H1, ...H RL1 and ...H RLP1
In default state, pulse inhibition is switched internally when the under-
voltage limit is exceeded, and fault signalling relay K1 de-energizes
(both can be set with THYRO-TOOL FAMILY).
Type Undervoltage limit Overvoltage limit
230V 99V 253V
400V 172V 440V
500V 215V 550V
600V 258V 660V