~ 2 ~
PEF-305
NOVATEK-ELECTRO
1 DESCRIPTION AND OPERATION
1.1 Application
Universal automatic electronic phase switch is designed to supply industrial and household single-phase of
230 V/50 Hz load from three-phase mains to ensure uninterrupted power supply of single-phase consumers and
protect them against unallowable voltage fluctuations in the mains. Depending on the availability and quality of
voltage on the phases, PEF-305 automatically selects the most optimum phase and feeds it with the single-phase
load of any power:
- measurement error is 1% maximum;
- automatic phase switching when its value drops below 180 V AC;
- three-phase power of L1-L2-L3 (L1- priority phase);
- factory settings: switching threshold voltage (180 V AC), switching time (150 ms) and voltage hysteresis (10 V
AC).
1.2 Controls and overall dimensions ofPEF-305
Fig.
1
–Overall dimensions
1.3 Operation conditions
The device is intended for operation in the following conditions:
–
Ambient temperature: from minus 20 to +45
°С;
–
Atmospheric pressure: from 84 to 106.7 kPa;
–
Relative humidity (at temperature of +25
°С): 30 … 80 %.
If the temperature of the device after transportation or storage differs from the ambient temperature at which it is
supposed to be operated, then before connecting to the mains keep the device under the operating conditions
within two hours (because of condensation may be on the device elements).
ATTENTION! The device is not intended for operation in the following conditions:
–
Significant vibration and shocks;
–
High humidity;
–
Aggressive environment with content in the air of acids, alkalis, etc., as well as severe contaminations
(grease, oil, dust, etc.).
2 TECHNICAL SPECIFICATIONS
2.1 Basic Technical Specifications
The basic technical specifications are given in Table 2.1.
Table 2.1
- Basic Technical Specifications
Rated phase voltage, V
3 x 230 V AC + N
Mains frequency, Hz
50 Hz
Protection rating of the device case
IP20
Time of switching over, ms
˜150
