Vector frequency converter 250 kW, 3F/380V (SPLC-NZ8400-250G/280P)

The inverter SPLC-NZ8000 can additionally be equipped with a PG board (purchased separately). With it, an encoder sensor can be connected to the inverter to track the motor rotation speed and rotor position. Vector control with feedback provides increased speed and frequency control accuracy to ±0.02%, allows torque control with ±5% accuracy and works with both asynchronous and synchronous motors.

When installing a frequency inverter in a protective cabinet, its control panel (operator panel) can be detached and brought out to the front panel. For this, a connector cable must be purchased.

Technical Specifications of the SPLC-NZ8000 Series

The introduction of simple scalar control in the SPLC-NZ8000 inverters makes it possible to select in the menu the load type “General” or “Pump”.

• General — industrial mode for motors operating with roughly constant torque at different speeds (compressors, conveyors, lifts). In this mode, the inverter can provide a starting torque of over 150% for acceleration, to overcome friction and inertia.
• Pump — specialised mode for fans, pumps, and other motors operating with torque increasing along with speed, where high starting torque is not required.

Thus, the frequency inverter SPLC-NZ8400-250G/280P is designed to control motors up to 250 kW, but when switching to scalar control and “Pump” mode, it can manage motors up to 280 kW. In this case, the permissible overload is reduced: if in normal "General" mode a load of no more than 150% for 60 s or 180% for 3 s is allowed, then in "Pump" mode with a more powerful motor, these figures decrease — overload of no more than 120% for 60 s or 150% for 3 s.

Principal Circuit of Frequency Converter SPLC-NZ8400-5R5G/7R5P

SPLC-NZ8000 boasts multi-function input-output control terminals, whose function can be independently defined in settings — determine set frequency, issue forward travel command, stop, etc.:

1. Inputs: 8 discrete inputs (including one high-speed pulse), 2 analog inputs (one 0...10 V or 0...20 mA, the second for +10...-10 V;
2. Outputs: 1 discrete transistor output (high-speed), 2 relays 250 VAC 3 A or 30 VDC 1 A, 2 analog outputs (0...10V or 0...20 mA).

By default, the frequency converter supports the most common communication port in enterprises in Ukraine RS-485, but on request, these inverters can be supplied with a data transfer board for Profibus or CAN, facilitating easy integration into any modern industrial network.

Selection of Frequency Converter Model SPLC-NZ8000 Series