Yellow
What is the voltage of the 3-phase power that runs most of the motors at the WWTP?
480 VAC
The measurement between line and neutral is called what?
Phase Voltage
Digital signal to SCADA provides what input or output?
On or Off
What does SCADA stand for?
Supervisory Control And Data Acquisition
An electrically operated switch is a?
Relay
What is the control voltage that runs most of the instruments at the WWTP?
24 VDC
Most of the pump stations run on what 3-phase voltage?
208 VAC
A discrete input (DI) or discrete output (DO) is what type of signal?
Digital
T or F: When equipment turns Red and Green on SCADA, it is an analog signal telling it to do so.
False – Digital Signal
If a 4-20 mA rage is 0-20 feet, what value would be displayed at 12 mA?
10 feet
How many wires deliver power in 3-Phase alternation current?
3
Name the two basic 3-phase configurations:
Wye (Y) and Delta (Δ)
A voltage or current-based measurement of a physical value is what type of signal?
Analog
T or F: The D.O. readouts on SCADA for the aeration basins are digital signals.
False – Analog Signal
How many amps can be lethal to a person?
1 amp
T or F: 3-Phase power is more efficient than single-phase power, so it can deliver the same power using smaller wiring?
True
A 3-phase delta configuration has how many wires?
3
The most common example of analog signal used at the WWTP is?
4-20 mA
What is the wattage of a motor pulling 10 amps on a 120 volt circuit?
1200 watts
A device that steps up or steps down voltage is called a?
Transformer
The measurement between 2 lines on 3-phase power is called what?
Line Voltage
A 3-pahse wye configuration may have how many wires?
4
Examples of an analog signals are?
Temperature, pressure, flow rate, ect.
A device that interrupts electricity when a fault is detected is a?
Circuit Breaker
The generators at the WWTP put out wat voltage?
480 VAC