Operating instructions

18
2.4.2 Alarm relay
Unlike the types Thyro-A…H RL1, the Power Controllers of type Thyro-A…H1 have
no alarm relay.
2.5 Monitoring
Faults occurring in the Power Controller are signalled. Signalling ensues via red
LED.
2.5.1 Monitoring of the load and mains voltage
The limiting values of the voltage are -57% of the type voltage for undervoltage
monitoring and +10% of the type voltage for overvoltage monitoring. This produces
the following absolute limiting values:
Type Undervoltage Overvoltage
230V 99V 253V
400V 172V 440V
500V 215V 550V
2.5.2 Equipment temperature monitoring
The control board is equipped with a temperature monitor.
In case of a fault the red LED blinks.
2.5.3 Ventilator monitoring
The separately ventilated power controllers (…F…) are fitted with thermal monito-
ring. The temperature of the heat sink is measured. In case of a temperature over-
range a fault indication ensues.
➜
3. Operation
This chapter describes the operating elements of Thyro-A. For default settings see
chapter 8.2.
3.1 Configuration switch S1
A 8-pole DIP switch is situated at the front behind the hood. The individual switches
are marked from 1–8 starting from the bottom and must be set before operation