5
AK-SecurePowerSwitch Manual,
AK-SecurePowerSwitch
Importance and functional principle of the relay
L
= Outer conductor
N
= Neutral conductor
PE
= Protective conductor
Release (FSR) relay
The release relay has to completely disconnect the connected consumers from the
110/230VAC mains voltage. For reasons of safety this relay serves to disconnect the
power supply of all sectors according to DIN VDE 0100. Therefore, it is designed with two
poles and disconnects L and N simultaneously from the connected consumers. This relay
is free of load, and it is not used to switch electrical devices.
SSR relay
The solid state relay is the actual switching relay and switches the electronic devices on or
off. 100ms before and 100ms after the switching operation, the SSR relay is activated or
deactivated. It is only used for wear-free and failure-free switching.
PWR relay
For very little loads of <10 watts, the solid state relay does not switch for technical reasons
since it is below the so-called „
Minimum Load“
. In order to also switch these loads
(measuring instruments, small power supply units, etc.) this relay takes over the switching
function. Furthermore, the PWR relay takes over the load when the SSR relay is being
inactivated and thus avoids an unnecessary power consumption of the SSR relay.
SSR
Solid-State
relay
PWR
Power relay
FSR
Release
relay
Input
110/230VAC
L
N
PE
Output
110/230VAC
L
N
PE
