Elspec EQUALIZER-ST, Руководство пользователя и инструкция по установке, Страница: 40 / 121

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www.elspec-ltd.com | December 2014 | SMX-0609-0101
User Manual | EQ-ST | V15
Figure 37: All Capacitor Groups Were Faulty
S
ETTING OF
M
AINS
CT
S
Use this parameter to set the Mains CTs input.
If you wish to use current transformer output with 1A (instead of 5A), set the CTs ratio 5 times its rating (e.g. to CT
1000/1A you set 5000A/5A), however this will have an adverse effect on system accuracy.
Figure 38: Setting of Mains CT
M
AINS
CT
S
P
OLARITY
Use this parameter to set the polarity of the Mains CTs. The objective is to see positive active energy readings
(kW) on all 3 phases. Any of the three phases that will show a negative reading can be corrected by scrolling to
the corresponding row, using F4 (

) and F5 (

), and pressing F3 (Select). If there is significant difference
between the phases (e.g. more than 20%), it is more likely that there is problem with the phases than with the
polarity (refer to
Troubleshooting ).
This parameter can be set when there is load connected and consuming power, so there are power readings and
the polarity is observed. In a situation like shown in the figure below, where there is no power consumption, the