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Demand Quantit

Phase Reference Function

Total VARs

(

A, B, C, Total

)

Phase, Total Present, Max, Min

Total VAs

(

A, B, C, Total

)

Phase, Total Present, Max, Min

6.10.1 Ampere and Fundamental Ampere Demand

Present Ampere Demands are calculated via the instantaneous measurement data

used to calculate the per-phase Amperes.

Upon power-up, all Present Ampere Demands are reset to zero. Maximum Ampere

Demands are initialized to the maximum values recalled from non-volatile memory.

Upon Ampere Demand Reset, all per-phase Present and Maximum Ampere Demands

are set to zero. When Ampere Demands are reset, Fundamental Current Demands

are also reset.

6.10.2 Volt Demand

Present Volt Demands are calculated via the instantaneous measurement data used

to calculate the per-phase Volts. Upon power-up all Present Volt Demands are reset

to zero. The Maximum Volt Demands and Minimum Volt Demands are initialized to the

minimum and maximum values recalled from non-volatile memory. In order to prevent

the recording of false minimums a new Minimum Volt Demand will not be stored

unless two criteria are met. First, the instantaneous voltage for that particular phase

must be greater than 20V

rms

(secondary). Second, the Present Demand for that

particular phase must have dipped (Present Demand value must be less than previous

Present Demand value). Upon Voltage Demand Reset, all per-phase Maximum

Voltage Demands are set to zero. Minimum Voltage Demands are set to full-scale.

6.10.3 Power Demands (Total Watts, VARs, and VAs)

Present Total Watt, VAR, and VA Demands are calculated via the instantaneous

measurement data. The Total VA Demand calculation type is based on the

instantaneous Total VA calculation type (Section 6.6)

Upon power-up, all Present Total Watt, VAR, and VA Demands are reset to the

average of the stored Maximum and Minimum values. The Maximum and Minimum

Demands are initialized to the minimum and maximum values recalled from

non-volatile memory. Upon a demand reset, the Maximum and Minimum Demands

Novatech Bitronics 50 Series User Manual

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