What is a good strategy for protecting my building, my processes and my profitability from damage due to power quality issues?
A good protection strategy accounts for all the various threats from power issues. It will start with good grounding and installation practices and extend to TVSS, UPS/power conditioning, three phase equipment protection, harmonic filtering, EMI/RFI, and VFD (variable frequency drive) issues.
What is High Resistance Grounding?
High Resistance Grounding is a grounding scheme employed to prevent transient overvoltages on ungrounded systems and limit fault current so that ground faults can be tracked without interruption of power to equipment. By limiting ground fault current arc flash is reduced providing for great safety for personnel.
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What is TVSS? What does it protect from?
TVSS stands for Transient Voltage Surge Suppression. TVSS devices protect equipment from short duration, high voltage events. The most common are associated with nearby lightning strikes or switching of large loads. TVSS units work by clamping voltages to a safe level before equipment is effected or destroyed. TVSS equipment does not protect against sustained overvoltages, undervoltages, or power interruptions.
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How does poor power factor affect my utility bill?
Poor power factor effect on biling can vary widely from no economic impact to a very sizeable impact depending on your particular rate tariff. Large commercial or industrial facilities (over 1,000kVA demand) are often subject to power factor penalties. Consult your utility representative for tariff information.
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What is power factor correction?
Power factor correction is the ratio of work producing power (kw) to total power (kva). Total power includes reactive power that is needed for magnetizing currents in inductive loads (i.e. motors). Power factor is one measure of energy use efficiency.
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