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Control and automation
E 235 mains disconnection relays

E 235 Mains disconnection relay

Application and method of operation
According to building biologists, electrical interference fields emitted from live cables can
impair well-being when the human organism is exposed to them for longer periods, e.g. in
the bedroom. The E 235 demand switch automatically cuts off the mains voltage of an elec-
tric circuit when the last consumer in that circuit has been switched off. When the first con-
sumer is switched on, the device switches the mains voltage back on with almost no delay.
A low voltage of approx. 3 V is used to monitor whether consumers are switched on. As alter-
E 235-NFS nating voltage is used for this, it is virtually certain that even small consumer units with 7
a capacitor and transformer power pack - e.g. charging stations for rechargeable devices,
standard lamps, etc. - will be reliably detected and switched. Interference fields emitted by
the monitoring voltage are so small that they cannot be registered. The mains is switched on
when the consumer load exceeds the making capacity set in the demand switch. It is cut off
when the consumer load falls to 2/3 of the set making capacity. The ON state is indicated by
the integrated LED. You can choose between „Automatic monitoring“ and „Permanent ON“
using a rotary switch on the E 235.

Accessories
The E 235-GLA base load adapter is also available, and is used for switching the demand
switch on manually. The adapter is plugged into a socket that is monitored by the demand
E 235-GLE switch. The toggle switch switches the base load, which is used to switch on the demand
switch.
Some consumers require an initial voltage equal to the mains voltage in order to be switched
on. These include brightness controllers, and fluorescent and energy-saving lamps. The PTC
base load element E 235-GLE and base load adapter E 235-GLA are available for ensuring reli-
able switch-on of the mains field relay. The indicator light on the adapter displays the
switched on mains voltage, irrespective of the position of the toggle switch. It tells you
whether the mains voltage has been cut off or whether other consumers are still switched
on. If you wish to connect a dimmer to the output of the demand switch, this must feature
an additional switching contact. A base load element is also switched in parallel.

Description Bbn Order details Price Weight Pack
4016779 1 1 piece unit

EAN Type code Order code piece kg pc.
mains disconnection relay 571821 E 235-NFS 2CDE110000R1701 0.065 1
base load element 571814 E 235-GLE 2CDE100500R1711 0.001 1
base load adapter 571869 E 235-GLA 2CDE100510R1711 0.070 1