WATTrouter M - user manual
How to fit and setup the device
Page 12 from 79
use only the actual surpluses produced by PV-plant. To make things simple, only 3 resistive (heating) loads are connected, but you may
use all 12 outputs. Similarly, you may also connect 3 regulators to 1 current sensing module. In such scenario, each regulato r works on
one phase and you will get 18 outputs.
Figure 6: Solid state connection of the entire RGS1A line, manufactured by Carlo Gavazzi. Relays RGS1A are replacements for older
types R1JA. You may also use other SSR with similar parameters (see chapter Technical specifications).
Figure 7: Increasing of current measurement range of the device for facilities where main circuit breaker is larger than 3x125A.
Transformers 200/5A, or even 400/5A may be used, based on the main circuit breaker value. Secondary coil of current transformers is
shorted through the current sensing module (the secondary circuit passes through measuring transformers in the current sensing
module). Increasing of current measurement range may be done in both SSR and MAX models, but we recommend WATTrouter M SSR
model due to higher resolution of A/D converter when current transformers with nominal secondary current of 5A are used. Additional
increase of current measurement range may be done if you take the secondary circuit of the current transformer and make sever al turns
through the measuring transformer in the current sensing module (for transformers 200/5A, the best option is to make 4 turns in order
to reach optimum transfer ratio 200/20A). For this purpose we recommend using lines, which are not overrated for the nominal
secondary current, just to be able to make more turns through the hole of measuring transformer. When connected through external
current transformers, the conversion ratio must be set correctly in the control software - see the item Conversion ratio of external CT‘s
in the main window of the WATTconfig M software.
Load
(only resistive)
L1
T1
A1+ A2-
RG
S1A
23
D
..
L1
N
to current sensing module
I >
Re
gul
at
or
I_
L1
I_
L2
I_
L3
FB
2
FB
3
G
ND
S2_
-
S+ S1_
-
FB
1
R2
_1
R2
_2
L1
N
NC
LT
T1_
1
T1
_2
T2
_1
T2
_2
R1
_1
R1
_2
NC
USB
LAN
micro
SD
