A. Power Factor is the ratio of the power required versus the power registered on your meter.

A. Power factor correction extends overall service life to equipment. It also places demand factors within more favorable rate limits for monthly billing resulting in better utilization of the energy for which you are being billed and an overall reduction in your monthly electric utility bill.

A. The band pass filter blocks power spikes, surges and voltage transients significantly above or below the 60-cycle signal frequency. It blocks harmonic distortion to improve the flow of electricity to the inductive load. This causes the motor to run smoother, quieter and with lower resistance. This reduces motor frame temperature.

A. TVSS components act to remove transient voltages and filter capacitors act to improve Total Harmonic Disturbances, thus further conditioning the AC waveform. This has an effect of helping improve service life of equipment. The effect on motors is that (motors are movable transformers), they are affected by the rise in current and frequency and generate a variance in the 60Hz waveform. The cumulative effect imposed upon contacts, coils, and semi-conductors by numerous disruptive surges, including harmonics, causes efficiency losses on the motors, which in turn will substantially increase power consumption as the motor compensates to meet demand. As pitting and corrosion occur, there is a rise in the operational temperature of the motor, which increases kilowatt usage and maintenance costs, as well as reduces the life expectancy of the motors and ballast. MOV (metal oxide varistor), provides a perfect ground, removing high voltage and switching transient voltages.

A. MRW Energy Management guarantees a ten percent (10%) reduction in KWH usage on the treated inductive load. However, in most instances you can expect a reduction in KWH usage in excess of ten percent (10%).

A. After extensive testing of the motors to be treated, we install the correct sized STEMS units and they reduce the amp draw, reduce the KVA, reduce KVAR, reduce motor temperature and improve the power factor.

A. NO. And you will not change the way you operate your facility other than paying less on your utility bill for the same production.

A. Virtually none. An operating light comes on when the STEMS unit is energized which is whenever the motor is running. In reality the Stems unit will lower your overall maintenance because lowering the motor temperature means less motor maintenance.

A. Not difficult at all. A STEMS unit has three hot wires (yellow, brown orange), one neutral wire (white) and a ground wire (green). You attach each hot wire to one phase of the load and the neutral and the ground wires to a ground/neutral bar.

A. The best applications are high use inductive motors.

A. STEMS must be installed before (up stream) of such equipment so that they do not interfere with their frequency. STEMS are always installed in parallel not in series because the voltage does not flow through the STEMS.

A. A STEMS unit improves the quality of the power supplied to a VFD or VSD. STEMS will make these drives last longer. STEMS must be installed upstream of the VFD or VSD, or it will have adverse effect on the drive output, as the frequency changes on the output are significantly lower than the STEMS band pass range. In addition, the savings will be less than on motors without these drives. MRW still achieves a 10% savings, but it is on a smaller load, with less wasted power, due to the VFD or VSD.

A. A STEMS unit improves the quality of the power supplied to this device. STEMS will help this equipment to last longer. STEMS must be installed upstream of the soft start. Failure to do so will void the STEMS warranty and may damage the soft start.

A. A STEMS unit comes with a three year pro-rated warranty against product failure. The first twelve months, provides free replacement, the next twelve months is 50% of the original cost and the final twelve months is 25% of the original cost.

A. MRW Energy Management guarantees a 10% reduction in KWH usage of treated motors, assuming a constant load. If after a complete review of the facts, it is determined that the STEMS unit has not performed as stated, then MRW will be responsible for remitting to the customer the difference between a 10% reduction in KWH usage and the actual reduction in KWH usage achieved. MRW’s obligation to remit this difference will continue until the customer has received energy dollar savings and dollars from MRW equal to the cost of the STEMS unit.

A. The STEMS should last not less than ten years with the original components.

A. The installation of bulk capacitors only eliminates the power factor penalty imposed by the electric utility company, while providing minimum impact on the plant’s overall KWH usage. The beneficiary of a bulk capacitor system is the electric utility company. Whether or not your plant has an existing bulk capacitor installation, MRW Energy Management’s energy savings solution allows Stems energy savings units to work in unison with motors, decreasing amp draw to the motor, KVA, KWH usage, KVAR and motor operating temperature and increasing power factor.