BS7671
&
BS EN61557
MTB7671
tester
requirements
Megger test
parameters
Calibration
points
Continuity short
Circuit test
Current
>200 mA
>200 mA
Pass/Fail indication
(Threshold limits ±2%)
>200 mA
Continuity test
Voltage range
4 V - 24 V
4 V - 24 V
Pass/Fail indication
(Threshold limits ±2%)
Continuity
resisitance
0.5
Ω
±3%
0.5
Ω
Continuity
resisitance
5.0
Ω
±3%
5.0
Ω
Insulation test
current
1 mA
1 mA
Pass/Fail
indication
(Threshold limits ±2%)
Insulation test
voltages
250 V +25%
max
500 V +25%
max 1 kV
+25% max
250 V +25%
500 V +25%
1 kV +25%
Pass/Fail indication
(Threshold limits ±2%)
Insulation test
resistances
0.25 M
Ω
min
0.5 M
Ω
min
1 M
Ω
min
0.25 M
Ω
±3%
0.5 M
Ω
±3%
1 M
Ω
±3%
0.25 M
Ω
0.5 M
Ω
1.0 M
Ω
Insulation test
resistances
9 M
Ω
±3%
90 M
Ω
±3%
9 M
Ω
90 M
Ω
Loop
Local mains impedance
Loop + 10
Ω
Loop + 10
Ω
(±5%)10
Ω
Loop + 180
Ω
(IEE On-site
guide 10.3.5
Earth electrode
resistance)
Loop + 180º (±5%)
180
Ω
RCD currents (I)
10 mA, 30 mA & 100
mA
RCD No trip
(1/2 I)
No trip
>1999 ms
RCD (I)
<200 ms
40 ms @ 0º
50 ms @ 180º
RCD (5 x I)
<40 ms
10 ms @ 0º
20 ms @ 180
Содержание MTB7671
Страница 1: ...M MTB7671 2 Test box User Guide...
