sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
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Commissioning Checking the residual current<br />
input connection<br />
PCRED301005EN - 06/<strong>20</strong>08<br />
DE80137<br />
Description<br />
Check to be carried out for Sepam S<strong>20</strong>, S23, T<strong>20</strong>, T23 or M<strong>20</strong>, when the residual<br />
current is measured by a specific sensor:<br />
b CSH1<strong>20</strong> or CSH<strong>20</strong>0 core balance CT<br />
b Another core balance CT connected to an ACE990 interface<br />
b A single 1 A or 5 A CT encompassing the 3 phases.<br />
Procedure<br />
1. Connect the single-phase current generator to inject current into the primary circuit<br />
of the core balance CT or the CT, in accordance with the diagram below:<br />
L1<br />
L2<br />
L3<br />
A<br />
Current generator<br />
I<br />
N<br />
test terminal<br />
box<br />
A<br />
2. Turn on the generator.<br />
3. Inject a 5 A primary residual current.<br />
4. Use the SFT2841 software to check that the residual current value is<br />
approximately equal to 5 A.<br />
5. Turn off the generator.<br />
4<br />
1<br />
5<br />
2<br />
6<br />
3<br />
18<br />
19<br />
B<br />
A<br />
Sepam<br />
S<strong>20</strong>/S23/T<strong>20</strong>/T23/M<strong>20</strong><br />
7/27<br />
7
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