Section 9

Harmonic currents are induced by loads that draw ----- in a ----- waveform.

Improperly grounded communication cables between peripherals and a mainframe computer may become a problem when exposed to a strong level of RF signals through all the following except -----

A ----- is an increase in the voltage level.

A PQ tool that does not require contact with energized circuits is a -----

Although ----- faults do not have enough current flow for the fuse or distribution breaker to operate, they can result in the lights blinking.

When considering a PQ analysis, data collection analysis will vary depending whether one is conducting an ----- or ----- exercise.

Putting an electronic drive in front of a 3 phase motor to make an adjustable speed drive or variable frequency drive alters the phase angle to reflect a ------.

Which of the 5 scenarios defined by NIOSH resulted in the 244 fatalities?

The ability to set a monitor device to trigger automatically when a PQ event occurs allows one to ----- the causes.

If the cummulative probability cp values from a PQ analysis study continures to increase what result can be expected?

What is the likely direction or source of the fault condition if the current increases significantly when the voltage decreases?

Users can usually define the # of RMS summary in ------

High impedance connections and current transformers may be needed to ensure that a PQ instrument does not have any significant impact on the -----

Lightning is an -----

Many tools designed to improve a ----- quality are not only amount the first to suffer from a lack of quality, but are sometimes contributers to the problems they are intended to resolve.

For a ----- load the current will decrease proportionally to the voltage drop.

It is usually wise to have the most ----- tool.

The 3 electrical theories (eg. Ohms, Kirchoff's law) are used to trace the ----- of most PQ problems.

If harmonic distortion is found to be noticably large on ------ systems

Both voltage unbalance and harmonics are generally considered ----- PQ problems.

If the measurements require potential transformers to step down voltages that exceed the instrument's ratings, make sure that the ----- and ----- of signals that the PTs will pass through will not affect the readings.

A PQ should be rated for the anticipated range of ----- and ----- levels.

----- PQ montitoring systems are typically web based to provide the advantage of showing trends.

PQ ----- may result from circumstances that exist inside or outside of a business' control.

Well grounded properly sized UL ----- should be installed on any metalic face.