METREL EurotestXC MI 3152 Instruction Manual page 39

MI 3152(H) EurotestXC (2,5 kV)
Length Unit [m, ft]
Ch1 clamp type
[A 1018, A 1019, A1391]
Range A 1018:[20 A]
A1019: [20 A]
A 1391: [40 A, 300 A]
Merge fuses [yes, no]
External Device [None, Commander]
Earthing [TN/TT, IT (MI 3152 only)]
system
Ignore PE [yes, no]
warning (IT)
IscMax, IscMin
[yes, no]
calculation
Limit Uc [12 V, 25 V, 50 V]
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.
½I
General RCDs
t > 300 ms

(non-delayed)
Selective RCDs
t > 500 ms 130 ms < t

(time-delayed)
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.
1)
I
N N
t < 300 ms

< 500 ms 60 ms < t

protective circuit breakers (fuses, over-current
breaking devices, RCDs). The value should be
set according to local regulative.
Length unit for specific earth resistance
measurement.
Model of current clamp adaptor.
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.
[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.
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.
Terminal voltage monitor is suited according to
the selected system.
In some measuring functions the results and
parameters are suited to the selected system.
[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.
[yes]: IscMax, IscMin calculation is enabled in
Z line measurement.
[no]: IscMax, IscMin calculation is disabled in
Z line measurement.
Contact voltage limit.
2I
N
t < 150 ms

< 200 ms 50 ms < t

38
Instrument operation
5I
N
t < 40 ms

< 150 ms
