Bender rcm420 - 1 Effective Use of this Manual; Notes for the User; Intended Use

5
TGH1410en/03.2012
1. Effective use of this manual
1.1 Notes for the user
This manual is intended for experts in electrical engineering and elec-
tronics!
In order to make it easier for you to find specific text passages or references in
this manual and for reasons of comprehensibility, important information is
emphasized by symbols. The meaning of these symbols is explained below:
1.2 Intended use
The AC and pulsed DC sensitive residual current monitor RCM420 (Type A)
from Bender is designed for fault and residual current monitoring in earthed
power supply systems (TN/TT systems) where an alarm is to be activated in the
event of a fault, but disconnection must be prevented. In addition, the device
can be used to monitor single conductors, such as PE conductors, N-PE con-
nections and PE-PAS connections.
Two separately adjustable response ranges I
Δn1
and I
Δn2
allow to distinguish
between prewarning and alarm (I
Δn1
= 50…100 % of the set response value
I
Δn2
).
Information calling attention to hazards are marked
with this warning symbol.
Information intended to assist the user to make optimum
use of the product are marked with the Info symbol.