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MI 3152(H) EurotestXC (2,5 kV) Instrument operation
38
protective circuit breakers (fuses, over-current
breaking devices, RCDs). The value should be
set according to local regulative.
Length Unit
[m, ft]
Length unit for specific earth resistance
measurement.
Ch1 clamp type
[A 1018, A 1019, A1391]
Model of current clamp adaptor.
Range
A 1018:[20 A]
A1019: [20 A]
A 1391: [40 A, 300 A]
Measuring range of selected current clamp
adaptor.
Measuring range of the instrument must be
considered. Measurement range of current
clamp adaptor can be higher than of the
instrument.
Merge fuses
[yes, no]
[Yes]: fuse type and parameters set in one
function are also kept for other functions!
[No]: Fuse parameters will be considered only in
function where they have been set.
External Device
[None, Commander]
The None option is intended to disable the
commander’s remote keys. In case of high EM
interfering noise the operation of the
commander can be irregular.
Earthing
system
[TN/TT, IT (MI 3152 only)]
Terminal voltage monitor is suited according to
the selected system.
In some measuring functions the results and
parameters are suited to the selected system.
Ignore PE
warning (IT)
[yes, no]
[yes]: In IT earthing system the instrument will
allow to start the selected measurement
regardless of PE warning detection.
[no], In IT earthing system the instrument will
block the selected measurement if PE warning
is detected.
IscMax, IscMin
calculation
[yes, no]
[yes]: IscMax, IscMin calculation is enabled in
Z line measurement.
[no]: IscMax, IscMin calculation is disabled in
Z line measurement.
Limit Uc
[12 V, 25 V, 50 V]
Contact voltage limit.
4.6.5.1 RCD standard
Maximum RCD disconnection times differ in various standards. The trip-out times defined in
individual standards are listed below.
½IN1)
IN
2IN
5IN
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
Table 4.1: Trip-out times according to EN 61008 / EN 61009
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.
39


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