Uninterruptible AC Motor Drives - UMD™ (UPS-VFD)

When it simply has to work, we have the solution

When you want to make sure that delicate processes that require high reliability simply do not break down, regardless of any possible utility power disturbance – choose our UMD™ system.

The UMD™ system runs continuously and switches instantly between mains and battery operation if the regular power supply goes down. Consequently the UMD™ supplies full power all the time and there is no need for start-up, as there is for a standby DC motor, which requires additional equipment to compensate for the lack of pressure during start-up. Faster and simpler maintenance through the use of standard units enables shorter downtime for servicing.

This means a quicker start, a higher availability and reductions in maintenance costs compared to if you use an extra standby system or a DC motor. And, since your operation can now be conducted more securely and reliably, you can focus on your core business and benefit financially from it as well.

In-line Integrated VFD’s allow precise motor control

UMD™ utilizes field-proven, high-quality VFD’s. All the advantages of VFD operation also applies to the UMD™. That includes: limiting start currents, starting at maximum torque, precise speed control, energy savings etc. At Direct On Line start of an induction motor, the inrush current can be up to 9 times of the nominal current. The UMD™ with its internal VFD solves the problem and realize the motor’s full potential.

Eliminates Single Point of Failure

The UMD™ system is designed to remove all Single Points of Failure. Traditional UPS systems must be doubled or excessively oversized to achieve the same safety level.

Complete factory tested UMD™ system

UMD™ is delivered as one complete MCC-unit. Type tested according to IEC, UL, CSA and other applicable standards. The system has single or redundant mains input breakers, battery charger, AC and DC busbars, and the required motor drive outputs. In addition, it can be extended to backup all AC and DC auxiliary loads.

As a result of this several complex engineering activities including battery sizing, power loss calculations, motor protection settings, fuse selectivity in distribution board, can be eliminated. It also allows for fast and straightforward installation and commissioning that can be performed by local technicians.

Typical applications for UMD™ (with VFD)

Our solutions are designed for applications in power generation, hydro-, wind-, oil- and gas industry – sometimes in tough environments and harsh conditions. Typical drive applications are pumps, fans, valves and sluice gates.

Uninterruptible motor drive (with VFD) type UMD™ S400