Glossary
0.1 Second Values: | These values are the RMS values of the indicated quantity as calculated after |
| approximately 50 milliseconds (3 cycles) of sampling. |
1 Second Values: | These values are the RMS values of the indicated quantity as calculated after |
| one second (60 cycles) of sampling. |
Alarm: | An event or condition in a meter that can cause a trigger or |
Annunciator: | A short label that identifies particular quantities or values displayed, for example |
| kWh. |
Average (Current): | When applied to current values (amps) the average is a calculated value that |
| corresponds to the thermal average over a specified time interval. The interval |
| is specified by the user in the meter profile. The interval is typically 15 minutes. |
| So, Average Amps is the thermal average of amps over the previous |
| interval. The thermal average rises to 90% of the actual value in each time |
| interval. For example, if a constant 100amp load is applied, the thermal average |
| will indicate 90 amps after one time interval, 99 amps after two time intervals |
| and 99.9 amps after three time intervals. |
Average (Input Pulse | When applied to Input Pulse Accumulations, the “Average” refers to the block |
Accumulations): | (fixed) window average value of the input pulses. |
Average (Power): | When applied to power values (watts, VARs, VA), the average is a calculated |
| value that corresponds to the thermal average over a specified time interval. The |
| interval is specified by the user in the meter profile. The interval is typically 15 |
| minutes. So, the Average Watts is the thermal average of watts over the |
| previous |
| value in each time interval. For example, if a constant 100kW load is applied, |
| the thermal average will indicate 90kW after one time interval, 99kW after two |
| time intervals and 99.9kW after three time intervals. |
Bit: | A unit of computer information equivalent to the result of a choice between two |
| alternatives (Yes/No, On/Off, for example). |
| Or, the physical representation of a bit by an electrical pulse whose presence or |
| absence indicates data. |
Binary: | Relating to a system of numbers having 2 as its base (digits 0 and 1). |
Block Window Avg: | The Block (Fixed) Window Average is the average power calculated over a |
(Power) | |
| to the demand calculations performed by most electric utilities in monitoring |
| user power demand. (See Rolling Window Average.) |
e Electro Industries/Gauge Tech Doc # E107706 V1.25 |
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