Manual

FULLTEST 3
EN - 39
5.7. GLOBAL EARTH RESISTANCE / CONTACT VOLTAGE (RA)
According to EN 60204-1, the conditions for protection against electric shock in installations with
automatic disconnection of mains voltage are:
Measurement or evaluation of fault loop impedance and testing the over-current protection device
involved in the fault loop.
Limit values are shown in the Table 10 of EN 60204-1.
5.7.1. RA LIMIT VALUE CALCULATION
The global resistance RA should be lower than or equal to UC LIM / IN, where limit contact voltage UC
can be set to 25 or 50 V.
Example: Selected UC LIM = 50 V
Selected I
N = 300 mA
RA LIM = 166.7
How to select limit contact voltage UC LIM:
Press the MENU SETUP CONTACT VOL. touch-screen keys and select 25 V or 50 V.
5.7.2. RA DISPLAY EXPLANATION
Selectable parameter:
IN nominal differential current 10, 30, 100, 300, 500, 650 or 1000 mA
Figure 27: Display with RA test result
1 ..... Selected function.
2 ..... Selected limit contact voltage (25 or 50 V).
3 ..... READY message. It is displayed when mains voltage UL/PE within 100 ... 265 V is present.
4 ..... Sub-results, mains voltage UL/PE at which the measurement was carried out and contact voltage
UC at nominal differential current.
5 ..... Measurement screen touch-screen key.
6 ..... IN touch-screen key to select nominal differential current. Currently selected value is displayed in
the bottom of the key.
7 ..... Measurement result (in green colour - result OK, in red colour - result not OK).
8 ..... Real time clock (hh.mm.ss).
9 ..... Unit of the test result.
10 ... Measurement result status (symbol
in green colour - result OK, symbol in red colour - result
not OK).