CT10.241, CT10.241-C1
CT-Series
3-P
HASE
,
24V,
10A,
240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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17.
D
IELECTRIC
S
TRENGTH
The output voltage is floating and has no ohmic connection to the ground.
The output is insulated to the input by a double or reinforced insulation.
Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using the
appropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all input-
terminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings
to the value in the table below.
Fig. 17-1
Dielectric strength
A
B
C
A
C
B
L1
Input
Earth
Output
-
+
L3
L2
Type test
60s
2500Vac
3000Vac
500Vac
Routine test
5s
2500Vac
2500Vac
500Vac
Field test
5s
2000Vac
2000Vac
500Vac
Cut-off current setting
for field test
> 10mA
> 10mA
> 30mA
It is recommend that either the + pole, the – pole or any other part
of the output circuit shall be connected to the earth/ground
system. This helps to avoid situations in which a load starts
unexpectedly or can not be switched off when unnoticed earth
faults occur.