Enzymes differ from most other catalysts by being much more specific. Enzyme activity can be affected by other molecules: inhibitors are molecules that decrease enzyme activity, and activators are molecules that increase activity.
This fact sheet briefly discusses several load estimation tech-. niques. Reasons to Determine Motor Loading. Most electric motors are designed to run at 50% to 100% of rated load. Maximum efficiency is. usually near 75% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of. 5 to 10 hp; peak efficiency is at 7.5 hp. A motor âs efficiency tends to decrease dramatically below. about 50% load. However, the range of good efficiency varies with individual motors and tends to. extend over a broader range for larger motors, as shown in Figure 1.
Generally, electric motor energy audits are performed for free. An electric motor energy audit will reveal: 1  Which electric motors are costing the most in terms of power cost and whether and when to change to a NEMA premium efficiency motor. 2  When to repair or replace an electric motor when and if it fails.ere is a breakdown of how much one 200 hp, 1,800 rpm and 460 V TEFC motor costs in power in a calendar year (7,200 hours of operation): 1  Average cost of power in the United States: $.068/kWh. 2  Annual Power Cost: $70,669. 3  Initial Purchase Price: Slightly more than $10,000.