Controllers MCE06ADV – MCE12ADV
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4.2
DEVICE INSTALLATION
4.2.1
Mechanical Installation
Mechanically, the device is intended to be mounted attached to the front door of the cabinet. The fitting
hole must be according to DIN 43 700, (dimensions 138
+1
x138
+1
mm).
4.2.2
Connections
Before connecting the supply to the device check the following items:
The installation and maintenance of the device must be carried out by specialised and dully
trained staff, according to National Electric Codes and Rules and International Standards
All the connections must be at the inner part of a protection cabinet.
Notice that when the device is connected to supply, the voltage at certain terminals can be
hazardous and cause electric shock in case of contact. Opening the electrical cabinet or
removing certain covers can compromise the user safety and should only be done by
qualified and authorized staff.
The MCExxADV
devices are used together with capacitor banks, which can remain charged
after supply disconnection. In order to avoid shock hazard, wait during 5 minutes after supply
disconnection before any manipulation inside the equipment cabinet.
MCExxADV
devices require current sensing of the installation. A current transformer (CT) must be
installed externally to perform this function.
Usually the current ratio of the CT is In / 5 A, where In must
be at least 1,5 times the maximum expected load current.
The CT must be installed at the incoming supply line (point of coupling of the user), so that it measures
the total current of all the loads, including also the compensation capacitor bank (see fig. 4.1)
The CT should be installed preferably in phase L1, while the voltage measuring terminals of MCExxADV
should be connected to phases L2 and L3 (see schematics in figs. 4.2 and 4.3). It’s important to respect
the connection senses of P1-P2 and S1-S2 shown in the above mentioned figs, otherwise the phase
difference will have to be corrected by adjusting the device according to set-up procedure indicated in
paragraph 5.17
.
RIGHT C
ECTI
WR
G C
ECTI
S
The CT
easures the wh e
curre t f ads
capacit r
ba !
I case f
a fu cti
chec
that the CT is
t sh rtcircuited
If CT is p aced i this p siti
"
E f the CAPACIT R
STAGES WI%% C
ECT!
The equip e t d es
t regu ate
pr per y
If CT is p aced i this p siti
A%% THE CAPACIT R STAGES
WI%% C
ECT!
WAR I G! This situati
ay
cause verc
pe sati
res
a ce a d vercurre t
Fig. 4.1.- Placement of current transformer (CT)