~ 5 ~
NOVATEK-ELECTRO
PEF-320
With normal voltage on all phases, (L1, L2, L3), the load will be connected to phase L1. If the voltage value
L1 goes beyond the thresholds, the PEF-320 will check the L2 phase and connect the load through it. If the
voltage value L2 is out of the trip thresholds, the PEF-320 will connect the load to phase L3. If the voltage on
the backup phases does not correspond to the set thresholds, the load is switched off.
Switching to the phase with unallowable parameters will not be performed.
After the load had been switched to the backup phase and the voltage parameters had been restored on
the priority phase, the load will be switched to the priority phase after the return time set by the User.
ATTENTION! If during the countdown of the return time, the voltage in the priority phase goes
beyond the thresholds, then the countertimer will be reset.
If Tr is in the
“
∞
”
position, then the return to the priority phase will be performed only when the voltage in
the backup phase exceeds the specified thresholds.
In the case when the voltage supplied to the load decreases below the threshold of the minimum allowable
voltage, the switching over or disconnection of the load will be performed with a time delay of 12 seconds. If the
voltage exceeds the threshold of the maximum allowable voltage or decreases by 30 V lower than the threshold
of the minimum allowable voltage, the load switching over or disconnection will be performed with time delay of
0.2 seconds.
When the load is disconnected, the PEF-320 continues to perform the voltage control for all phases.
After restoring the voltage parameters at one of the phases within acceptable limits, the PEF-320 will switch
the load to this phase during the time of AR.
4. THE INTENDED USE
4.1. Preparation for operation
4.1.1.
Preparation for connection:
unpack the device and check the device for damage absence after transportation; in case of such
damages detection, contact the supplier or the manufacturer;
carefully study the Operation Manual (
pay special attention to the diagram of the device connection
to power
).
4.1.2.
Device connection
ATTENTION! THE DEVICE IS NOT INTENDED FOR SWITCHING A LOAD IN CASE OF SHORT
CIRCUITS. IN THE CIRCUIT OF OUTPUT CONTACTS OF THE DEVICE IT IS NECESSARY TO INSTALL
THE CIRCUIT BREAKER (FUSE) WITH CUT-OFF CURRENT NOT OVER 16 A OF CLASS B.
ATTENTION! ALL CONNECTIONS MUST BE PERFORMED WHEN THE DEVICE IS DE-ENERGIZED.
Error when performing the installation works may damage the device and connected devices.
To ensure the reliability of electrical connections the flexible (stranded) wires with insulation for voltage of at
least 450 V should be used, the ends of which it is necessary to be striped of insulati
on for 5±0.5 mm and
tightened with bootlaces. It is recommended to use the wire with cross-section of at least 1 mm
2
. Wires
fastening should exclude mechanical damage, twisting and abrasion of the wire insulation.
IT IS NOT ALLOWED TO LEAVE EXPOSED PORTIONS OF WIRE PROTRUDING BEYOND THE
TERMINAL BLOCK.
For a reliable contact, tighten the terminal screws with the force indicated in Table 1.
When reducing the tightening torque, the junction point is heated, the terminal block may be melted and
wire can burn. If you increase the tightening torque, it is possible to have thread failure of the terminal block
screws or the compression of the connected wire.
4.1.2.1.
Connect the device according to the diagram shown in Fig. 2.
