Tripping Times For The General And Selective Rcds - MARTINDALE VR2250 User Instruction Manual

6.3.1. Tripping times for the general and selective RCDs

Table of tripping times for I
If the parameters set on the instrument comply with the type of RCD under test (and
if the latter works properly) the test x1, x2, and x5 SHALL cause the RCD tripping
within the times shown in the following table:
RCD type
General
S
Selective
* For rated values I∆N ≤ 30mA the test current at five times is 0.25A.
I
For currents equal to ½
∆N
Table 3: Table of tripping times for tests with leakage currents I
x5 and AUTO.
Table of tripping times for ramp tests " ".
This test should not be used to compare the RCD tripping time at the tripping current,
while the standards refer to the maximum tripping times in case the RCD is checked
with a leakage current equal to the rated current.
The limit values for the tripping current are indicated in the following Table:
RCD Type
Table 4: Current limit value for "Ramp" Test
x1, I x2, I
∆N ∆N
I x 1 I x 2 I
∆N ∆N
0.3s 0.15s
0.5s 0.20s
0.13s 0.05s
the RCD shall not trip in any case.
A
AC
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x5 and AUTO tests.
∆N
x 5
∆N
Max tripping time in seconds
0.04s
Max tripping time in seconds
0.15s
Minimum tripping time in seconds
0.05s
≤ 10mA
I
∆N
1,4 x I
∆N
I
∆N
VR2250
Description
x1, I x2, I
∆N ∆N
I > 10mA
∆N
1,4 x I
∆N
I
∆N
∆N