User's manual
PFC max 6, PFC max 12 Page 13
IP51 (device mounted in panel front)
IP30 (device case) according to EN-60529
Environment admissible conditions
Temperature: -20ºC a +60ºC; Relative humidity: max. 95%
(without condensation). Max. altitude: 2000m
FCP (Program which minimizes the number of operations)
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 PFC max 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.
PFC max 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 PFC max
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 5.1.7.
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