Schneider Electric PowerLogic PM5300 Series Spezifikationen PDF herunterladen (Seite 61)

63230-507-201A1 Power Meter 750

03/2007 Glossary

GLOSSARY

TERMS

accumulated energy—energy can accumulates in either signed or

unsigned (absolute) mode. In signed mode, the direction of power flow is

considered and the accumulated energy magnitude may increase and

decrease. In absolute mode, energy accumulates as a positive regardless

of the power flow direction.

active alarm—an alarm that has been set up to trigger the execution of a

task or notification when certain conditions are met. An icon in the upper-

right corner of the meter indicates that an alarm is active (!). See also

enabled alarm and disabled alarm.

baud rate—specifies how fast data is transmitted across a network port.

block interval demand—power demand calculation method for a block of

time and includes three ways to apply calculating to that block of time

using the sliding block, fixed block, or rolling block method.

communications link—a chain of devices connected by a

communications cable to a communications port.

current transformer (CT)—current transformer for current inputs.

demand—average value of a quantity, such as power, over a specified

interval of time.

device address—defines where the power meter resides in the power

monitoring system.

event—the occurrence of an alarm condition, such as Undervoltage

Phase A, configured in the power meter.

firmware—operating system within the power meter

fixed block—an interval selected from 1 to 60 minutes (in 1-minute

increments). The power meter calculates and updates the demand at the

end of each interval.

float—a 32-bit floating point value returned by a register. The upper 16-

bits are in the lowest-numbered register pair. For example, in the register

4010/11, 4010 contains the upper 16-bits while 4011 contains the lower

16-bits.

frequency—number of cycles in one second.

line-to-line voltages—measurement of the rms line-to-line voltages of the

circuit.

line-to-neutral voltages—measurement of the rms line-to-neutral

voltages of the circuit.

maximum demand current—highest demand current measured in

amperes since the last reset of demand.

maximum demand real power—highest demand real power measured

since the last reset of demand.

maximum demand voltage—highest demand voltage measured since

the last reset of demand.

maximum demand—highest demand measured since the last reset of

demand.

maximum value—highest value recorded of the instantaneous quantity

such as Phase A Current, Phase A Voltage, etc., since the last reset of the

minimums and maximums.

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