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SZR-279 network-aggregate reserve controller
Automatic transfer switch controller
Enables simultaneous control of up to three supply lines.
SZR-279 is intended for the control of parameters and correctness of operation of supply lines and automatic changeover of the object's power supply sources in the event of a drop in the parameters of the currently switched-on supply line or a total voltage drop in this line.
Functions of the АВР-279 reserve circuit breaker controller
- Simultaneous control of up to three supply lines-measurement of phase voltages on each phase on all supply lines-including:
*phase presence control;
*phase sequence control;
*phase asymmetry control;
- monitoring of minimum and maximum phase voltage;
- control of contactors or motorised switches;
- Contactor condition monitoring;
- monitoring the operation of overcurrent circuit breakers;
- generator start signal;
- ALARM output;
- PIN code access lock to the controller settings;
- ability to operate from an external power source;
- operation in the voltage range from 24 to 450 V;
- use in 1-phase circuits;
- automatic activation of reservepower supply according to the specified algorithm;
- protection of consumers from voltages above 400 V;
- setting of the operating time of the stand-by switching system after switching off and restoring the main power supply;
- manual control of executive devices;
- indication of presence and value of voltages on inputs;
- status indicators ("on", "off", "failure") of executive devices;
- indication of operating modes;
- software and electrical interlock against simultaneous activation of contactors;
- isolated signalling and alarm outputs;
- back-up line monitoring from generator.
- Controlled lines
- 3 x 400 V + N (four-wire)
- The number of controlled lines
- 3
- Power supply voltage
- 24÷264 V AC
- Frequency
- 45÷55 Hz
- Maximum voltage
- 450 V AC
- Turn off time
- 2÷30 s
- Off time upper
- 0,3÷10 s
- Line switching time
- 0,3÷30 s
- Generator starting time
- 5÷100 s
- Extinguish generator time
- 20÷200 s
- Switch-off time at power failure
- 4 s
- The time the main input was turned on after the voltage was restored
- 5÷600 s
- Number of relay outputs
- 5
- Maximum load current
- 8 A
- The maximum current of the contactor coil
- 2:00 AM
- Contact configuration
- 4 × NO/NC, 1 × NO
- Lower voltage threshold
- 150÷210 V AC
- Upper voltage threshold
- 230÷300 V AC
- Voltage asymmetry
- 20÷100 V
- Terminal
- pluggable terminal blocks 2,5 mm²
- Tightening torque
- 0,4 Nm
- Power consumption
- 4 VA
- Working temperature
- -25÷40°C
- Dimensions
- 6 modules (105 mm)
- Assembly
- on rail 35 mm
- Ingress Protection Marking
- IP20
Automatic transfer switch controller
Enables simultaneous control of up to three supply lines.
SZR-279 is intended for the control of parameters and correctness of operation of supply lines and automatic changeover of the object's power supply sources in the event of a drop in the parameters of the currently switched-on supply line or a total voltage drop in this line.