Catalog

Description

PZWG 45 kW

The converter is designed for group operation in electric drive systems of fans specifically used for cooling gas after compression. This device features a control algorithm that limits current harmonics, and a range of parameters tailored for the gas transportation technological process.

 

Specifications:

• Rated power (Pn) at constant moment load for permissible overload current (Ip) of 1.5 In: 45 kW
• Rated output current (In) for power (Pn): 90 A
• Permissible load: 1.5 In 60 per every 10 minutes
• Operational climatic conditions:

– ambient temperature: from -10 °C to +50 °C;

– humidity: from 5% to 95%;

– pressure: from 860 hPa to 1060 hPa;

– explosive environment, dustiness 10 mg/m³, atmosphere category II, permissible humidity up to 98% at a temperature of 25 °C (in accordance with GOST 15150).

• Degree of protection: IP00
• Voltage from the grid: 3 x 380..400 V, 45..66 Hz; other voltage levels are available upon request
• Voltage from the electrical machine: 3 x 380..400 V, 0..400 Hz
• Control:

– scalar U/f (linear or quadratic);

– vector control: (with/without a sensor).

• Indication and control panel with a detachable LCD display
• Built-in PLC controller
• Built-in controller for groups of pumps or fans 
• Integrated PID controller
• RS232/RS485 built-in communication module (Modbus)
• Programmable constant speeds
• Motor potentiometer function
• Option of direct connection of the encoder
• Elimination of programmable resonance frequency bands
• Specific shapes and slopes of the speed setting  characteristics (linear, “S” curve)
• Torque control capability
• Motor parameter identification
• Programmable structure:

– switchable control options (A, B);

– speed setting (control panel, analog input, PID controller, motor potentiometer, functional block);

– torque setting (analog inputs, functional block);

– start and direction control (control panel, digital input, functional block);

– programmable digital inputs: start, direction, operation lock, external fault, fault rectification;

– programmable digital outputs: ready, operating, fault, no fault, warning, radiator temperature exceeded, current limitation, functional block;

– programmable analog outputs: frequency, rotation speed, output current, voltage, load, arbitrary functional block.

• Operational time measuring
• Locking and diagnostic system
• Keyboard protection with access codes system
• Option of saving parameters for 4 motors
• Predetermined factory parameters
• Built-in LC filter