Control device for two three-phase pumps STANDARD AKN-2-4.0-S

STANDARD AKN-2-P Device for complex electronic protection and control of two three-phase pumps in pressure boosting systems (PBS). EQUIPMENT Multifunctional microprocessor controller Built-in multimeter for monitoring electrical parameters of pumps Keyboard for programming the device Wide selection of algorithms for different systems and types of sensors 60 programmable parameters 4 inputs for connecting sensors (dry, wet contact) One input for a 4-20 mA sensor Two inputs for WSK/PTC sensors 2 inputs for connecting differential pressure relay sensors or oil chamber leakage sensors Display of sensor status 4-digit seven-segment indicator for displaying information about the system LED indication of operating modes and alarms LED indicator of "dry running" of pumps LED indicator of voltage alarms LED indicator of current alarms for each pump LED indicator of differential pressure or oil chamber leakage alarm Possibility of programmatic change of device phasing Automatic restart of the pump after its emergency shutdown Two programmable alarm relays Manual/Automatic mode selection button Pump activation buttons in manual mode for each pump Main switch with door lock function 2 soft start modules (for SS modification) IP54 non-flammable plastic housing (for pumps up to 11 kW) and IP54 powder coated metal housing (for pumps over 15 kW) IP 56 outdoor housing with internal false door (for outdoor installation of devices) Device housing heating system (for outdoor installation of devices) Sealed cable entries MODIFICATIONS STANDARD AKN-2-P STANDARD AKN-2(21)-P-S - for direct pump start STANDARD AKN-2-P-ST - for starting the pump using the star/delta scheme STANDARD AKN-2-P-SS - for soft start and stop of the pump CONTROL The device provides two main operating modes: normal and emergency In normal mode, automatic and manual control of the pumps is carried out via a microprocessor controller. In automatic mode, the pump is switched on/off by signals from external sensors according to the operating algorithm selected by the user. The device automatically maintains the set pressure in the system and controls the water pressure at the pump inlet. In manual mode, the pump is switched on/off using the manual control button on the front panel of the controller. The emergency pump control mode is provided in case of failure of the microprocessor controller. In this mode, the pump is switched on and off using the corresponding switches. FUNCTIONS Protection functions Electronic protection of pumps against power failures: break of one or two phases, unacceptable voltage asymmetry in phases, unacceptably low/high voltage in phases, phase sequence violation (for STANDARD AKN-2-P) Protection of pumps against short circuits on the device-pump line Electronic protection of pumps against current overloads with an inverse current-time characteristic Protection of pumps against dry running: electronic (by power factor and minimum current) or by a signal from an external sensor Protection of pump electric motors against overheating by signals from built-in WSK/PTC sensors All protection parameters are displayed on the device display and are programmable by the user Indication functions Using the digital display of the device: supply voltage values by phases (V) operating currents of pumps by three phases (A) imbalance between operating currents of pumps (%) current power factor pumps (cosφ) programmable parameters measured signal value (when using sensors with output (4-20 mA) ability to view the alarm code Using LED indicators: Indication of pump operating mode (Manual/Automatic) Indication of pump operation Indication of emergency stop of pumps Indication of power failure Indication of overheating of pump electric motors Indication of the state of discrete sensors (closed/open) Service functions Hour meter (separately for each pump) Log of emergency shutdowns of pumps with alarm codes Two relays for transmitting signals about the system operation (signal type is programmable by the user)