Specifications for degrees of protection provided by enclosures All Invertek Optidrive Plus 3GV units carry a 2 year warranty against manufacturing View and Download Invertek Drives Optidrive HVAC Series user manual online. AC Variable Speed Drive 0.75kW-160kW/1HP-250HP. Optidrive HVAC Series controller All Invertek Optidrive units carry a 2 year warranty against manufacturing defects from the date of manufacture. The manufacturer accepts no.Invertek Drives Ltd hereby states that the Optidrive Plus/VTC product range less than those defined in the Generic radiated emissions standard EN61000-. Invertek Optidrive E2 IP55 AC Frequency Inverter for 0.75kW (1HP) or 0.55kW (0.75HP) 400V 3 Ph motor in VxF control to 2.2A. Simple to set up for a standard The Optidrive employs open loop voltage and frequency control to regulate the speed of the motor. The digital control is combined with the latest IGBT power Invertek. Drives' unique and innovative Optidrive range is designed for ease of use and meets recognised international design standards for CE (Europe),