Tense RGT-MT18, User Manual

Page: 7 / 36

Maintenance of the D evice
Turn off the energy of device and disconnect it from the connections. Clean the body of
the device with a slightly damp or dry cloth. Do not use conductive or other chemicals that
may damage the device as a cleaning materials. After the device is cleaned, make
connections and make sure that the device is working by energizing the device.
3
Point to Pay Attention About The Choice And Connection of the Current
Transformers
How to C onnect the NTC to I nside of the P anel T emperature?
In order to measure the surrounding temperature of the panel,
NTC terminal will be attached which comes within the device.
NTC's one terminal will be attached to the R S 485 connection's
GND, the other terminal will be connected to the NTC. When the
connection accomplished, panel heat value is seen on the screen.
When the connection disconnected or reach to the -40, ''NC'' sign
is seen on the screen.
Be careful about the value of the current transformer to be more than the maximum
current which could be/is attracted from the system.
It is recommended that class of the current transformers (it can be also mentioned
class, klas, kl, cl ) should be 0,5 which will be used at the compensations.
Only X5A current transformers can be connected to the RGT-MT18.
Be careful about the absence of any load before the current transformers. Otherwise
there can be differences between reactive and counter.
Current transformer outputs and phase inputs must be in the same order. Connect the
k-l terminals of the current transformer connected to the L1 phase to the k1-l1
terminals, the k-l terminals of the current transformer connected to the L2 phase to the
k2-l2 terminals and the k-l terminals of the current transformer connected to the L3
phase to the k3-l3 terminals.
While connecting output of the current transformer terminals in order to avoid
confusion, use different coloured cable for each phase or number the cables.
Pass the cables which is connected to the output of the current transformer far from the
high voltage line.
It is advised that the cables to be used which are connected to current transformer
should be minimum 1.5 mm2. It is also recommended that the cables should be
thickened as the distance increase.
In order to avoid shake at the current transformers, fix to the bus, cables or rail.
SGND
B
A
SVC CON
NTC
(10K)
NTC