HT FULLTEST3, Руководство пользователя, Страница: 53 / 100

FULLTEST3
EN - 51
6.6.1. Measurement limit value settings
The instrument allows to perform measurement of the Loop impedance and the
calculation of the corresponding prospective short-circuit current (Isc). The following
5 modes are available for selecting the presumed
I
SC LIM
limit short-circuit current
which define the basis of the final evaluation:
STD mode (Standard)
No verification is performed by the instrument. In this case, no limit is considered, the
test result is not evaluated and is always considered neutral (displayed in white)
kA mode (protection breaking capacity verification)
The instrument verifies that the short-circuit current should be lower than the
breaking capacity of the BC (Breaking Capacity) protection expressed in kA, that is
the breaking capacity of the over-current protection device inserted. The measured
I
SC MAX
value must be less than or equal to the breaking capacity Ib of the
overcurrent protection device inserted, selectable between the values: 1, 1.5, 3, 4.5,
6, 10, 15, 16, 20, 25kA
I
2
t mode
The instrument verifies that the protection device reacts before the conductors
overheat and are therefore damaged. On the basis of the measured
I
SC MAX
values,
of the protection device inserted, of the rated current of the protection device (In), the
instrument calculates the trip time of the protection device (t) (see § ). It is possible to
select the parameters to be inserted between the following values:
¾ Type of MCB protection: B, C, D, K curves
¾ Nominal current of MCB protection: 6, 10, 13, 16, 20, 25, 32, 40, 50, 63A (B
curve), 0.5, 1, 1.6, 2, 4, 6, 10, 13, 16, 20, 25, 32, 40, 50, 63A (C curve), 0.5, 1,
1.6, 2, 4, 6, 10, 13, 16, 20, 25, 32A (D, K curves)
¾ Type of Fuse protection: gG, aM
¾ Nominal current of Fuse protection gG : 2, 4, 6, 10, 13, 16, 20, 25, 32, 35, 40, 50,
63, 80, 100, 125, 160, 200, 224, 250, 315, 355, 400, 500, 630A
¾ Nominal current of Fuse protection aM : 6, 10, 16, 20, 25, 32, 35, 40, 50, 63, 80,
100, 160, 224, 250, 315, 355, 400, 500, 630A
¾ Wire material: Cu (Copper), Al (Aluminum)
¾ Wire coating: PVC, B utyl rubber , EPR/XLPE
¾ Conductor section: 1, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240,
300, 400, 500, 630 mm
2
¾ number of conductors in parallel : 1 ÷ 99
TRIP CURR mode (trip out current)
The instrument verifies that the protection device tripping within the established time
at the measured short-circuit current. Based on the measured
I
SC
MIN values, the
type of protection device inserted and the rated current of the protection device (In),
the instrument calculates the trip out time which must be less than or equal to the
inserted Tset. The parameters to be inserted can be selected from the following
values: