The IMO Jaguar LFT inverter drive has been designed to meet the speciific requirements of the lift industry.  In addition to offering lift applications a significant performance boost, the LFT can be operated by battery power to allow trapped lift passengers to be rescued quickly and easily in the event of mains power failure.
The LFT has a unique input function that uses timers to filter any difference between BRKS and BRKE signals to check that the lift brake has actually operated. A dedicated brake control signal (BRKS) means that the LFT directly controls the opening and closing of the mechanical brake without assistance from the main lift controller. The LFT also contains built-in adjustable timers to delay the BRKS signal in order to match the mechanical brakes’ actual opening and closing time.

Other features include a restart time function, which avoids damage from contactor racing causing harmful regenerative currents emanating from the motor, and a contactor controller which times the opening and closing of the magnetic contactor in sequence with the inverter and motor operation. Thus, start and end delay times allow contactor operation without making or breaking motor current.

In closed loop applications the LFT does not need an external signal for zero speed command. This helps to avoid shock at starting and stopping due to car roll-back. In open loop applications to avoid possible “jolts” the user can choose between start using a pre-programmed starting frequency held for a period of time, or start by holding on DC braking for a short time.

The LFT includes a match timer to validate speed change commands. This function is useful for lift controllers using relays for output switching that could bounce and give false signals to the inverter drive.

Download the one page IMO Jaguar LFT one page datasheet

Go to IMO inverter drives from www.999Inverters.co.uk