Voltage Measurement - BEHA Unitest TELARIS Fi/RCD Manual De Instrucciones

Voltage Measurement

5.1 Voltage Measurement
Prior to usage the test instrument and the test
leads have to be tested for correct functioning.
Test leads and test probes may only be
touched at the handles provided. The user
must not touch the test probes.
The measurement connectors may not be con-
nected to external voltages exceeding 300 V
AC or DC to avoid any instrument damage.
When changing the measurement function or
parameter I∆N and UL parameters, the TELA-
RIS Fi/RCD-Analyzer automatically switches
to the voltage measurement function.
Select measurement function using the fun-
ction selection switch (31).
Connect test lead /mains connection lead to
the UUT, as described in figure 1 or 2.
Read measurement data on the display.
Fig. 1
No data storing possible !
36
Fig. 2
5.2 General Information about RCD Tests
The contact voltage UB and the trip time t required by
the RCD to disconnect the subsequent current circuit
from the mains represent important measurement
units for the asessment of an RCD. For this reason,
IEC 60364 prescribes that
a) the maximum allowable value for the contact volt-
age (25V/50V) may not be exceeded within any
system during tripping at nominal residual cur-
rent.
b) the RCD must trip within a time limit of 300ms.
The task of an residual current device (RCD) consists
in switching off a system within a defined time peri-
od after an error prior the contact voltage reaches the
permissible limit value of 25V / 50V.
The system testing should be started by carrying out
I∆N:
a visual inspection, in particular of the protective
earth connection.
A t ,U
t B
RCD t
U B /R E I A ,U B
RCD t
1. Within the IT system, the protective earth conduc-
IR/
RS 232
tor doesnot have to be connected with the PEN but
TELARIS FI/RCD Analyzer
DIN VDE 0100 / ÖVE EN 8001 / NIV/NIN
EN 61557 / EN 60364 / IEE 16 th Edition
with the protective earth connection.
2. The protective earth conductor must be connect-
ed to the PEN prior to the RCD within the TN sys-
tem.
3. An insulation measurement as described in Sec-
tion 5.2 must be performed. In particular it must
be proved, that there is no connection between N
and PE following the RCD.
I∆N:
t
A ,U B
t RCD
U B /R E I t A ,U B
t RCD
IR/
RS 232
TELARIS FI/RCD Analyzer
DIN VDE 0100 / ÖVE EN 8001 / NIV/NIN
th
EN 61557 / EN 60364 / IEE 16 Edition