MI 3102(H) BT
Eurotest
XE
Instrument operation
26
4.4.4 Earthing system (MI 3102 BT only)
In this menu the earthing system can be set.
Options are:
TN/TT,
IT.
Figure 4.8: Selection of earthing system
Keys:
UP / DOWN
Selects option.
TEST
Confirms selected option and exits to settings menu.
ESC
Exits back to settings menu.
Function selector
Exits back to main menu without changes.
4.4.5 RCD testing
In this menu the used standard for RCD tests
can be set.
Figure 4.9: Selection of RCD test standard
Keys:
UP / DOWN
Selects standard.
TEST
Confirms selected standard.
ESC
Exits back to settings menu.
Function selector
Exits back to main menu without changes.
Maximum RCD disconnection times differ in various standards.
The trip-out times defined in individual standards are listed below.
Trip-out times according to EN 61008 / EN 61009:
½
I
N
*)
I
N
2
I
N
5
I
N
General RCDs
(non-delayed)
t
> 300 ms t
< 300 ms
t
< 150 ms
t
< 40 ms
Selective RCDs
(time-delayed)
t
> 500 ms 130 ms < t
< 500 ms 60 ms < t
< 200 ms 50 ms < t
< 150 ms
Test according to standard IEC/HD 60364-4-41 has two selectable options:
IEC 60364-4-41 TN/IT
and
IEC 60364-4-41 TT
The options differ to maximum disconnection times as defined in IEC/HD 60364-4-41 Table
41.1.
½
I
N
*)
I
N
2
I
N
5
I
N
General RCDs
(non-delayed)
t
> 999 ms t
< 999 ms
t
< 150 ms
t
< 40 ms
Selective RCDs
(time-delayed)
t
> 999 ms 130 ms < t
< 999 ms 60 ms < t
< 200 ms 50 ms < t
< 150 ms
