PM
-
3133i User
’s Manual v1.02
Last Revised: Apr. 2023 Page: 68
Copyright © ICP DAS Co., Ltd. All Rights Reserved.
E-mail: [email protected]
Appendix 1: Questions & Answers
Q1.
Can we use the other 5A CT’s (like 300/5) to directly connect to the input current
terminals of PM-3133i series?
No, because the input current is only mA size on PM-3133i series
，
definitely not to
directly use other 5A CT’s to connect and apply
（
like100/5…
）
，
It could causes the fetal
damages. Users can use the PM-3133i series attached split type clip-on CT to connect
the other CT’s secondary test 5A current.
Q2. If I want to replace the failed split type clip-on CT, can I just detach it? Anything I
should pay more attention to?
In any circumstance, please make sure the CT had been disconnected with the power
cable of monitoring equipments before the CT lines detach from the terminals of the
smart meter. Otherwise, it will cause the severe injury.
Q3. If the turn point of the split type clip-on CT has broken, or inner Ferrite-core has
broken, how to settle this condition?
The measure data will be not accuracy as before, please do not use any more.
You need the new CT.
Q4. If multiple set of meters being installed
，
Can I detach the CT’s and mix use with
each other?
Please do not mix use
，
because each set of smart meter(PM-3133i series) and its
attached split type clip-on CT are calibrated set by set. The mix use may cause the
wrong measurements.
Q5. What problem is while the measured readings of the power consumption
（
kw
）
is
negative?
(1) First check the current input end
– line terminal,
（
check the connection should be
CT1-K, CT1-L, CT2-K, CT2-L, CT3-K, CT3-L
）
，
base on white black, white black,
white black follow the sequence order
(2) Check the field current direction
（
K→L
）
is same as the inner arrow direction of the
split type clip-on CT.
