0BChapter 3
Functions
3-8
Functions
z
Simple measurement
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
{
×
: Two-system having measurement function O:
With
measurement function
X: Without measurement function
• The simple measurement function roughly grasps the power of installed circuits without
making voltage measurements (wiring).
• This function is set when voltage cannot be entered to the Model KM1 due to conditions of
the field, limitations of wiring, etc.
• Simple measurement calculates the power amount by considering a fixed value of power
factor for the fixed value of voltage and actually calculated current value.
• In the simple measurement, the frequency is fixed to 50 Hz. (No change allowed)
• Accuracy assurance is not applicable because the voltage, power factor, and frequency
are fixed.
• Setting range: OFF/ON (Initial value: OFF)
• During the simple measurement, pay attention to the following points.
*1. An overvoltage error or frequency error has not been detected.
*2. The setting of VT is disabled with the simple measurement set to ON.
*3 Since the phase with current has not been measured actually, it is unavailable for
measurement of regenerated power.
*4. CTD8E (CT expansion) can perform the two-system measurement only when it is
connected to PMU2A (power two-system).
*5. The setting is required in each unit.
¡
Voltage on simple measurement
• Set the voltage value to be used in simple measurement.
• Setting range: 0.1 to 9999.9 V (Initial value: 110.0 V)
¡
Power factor on simple measurement
• Set the power factor to be used in simple measurement.
• Setting range: 0.01 to 1.00 (Initial value: 1.00)
z
Total power conversion coefficient
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
{
×
: With settings of two-system O: With setting X: Without setting
Set a coefficient to be used to convert integrated power.
It can be converted into CO
2
emissions or currencies according to the value to be set.
Conversion values can be obtained by the following calculation formula.
Conversion value = Total integrated power amount X
Total power conversion coefficient
Setting range: 0.000 to 9999.999 (Initial value: 1.000)
* CTD8E (CT expansion) can perform the two-system measurement only when it is
connected to PMU2A (power two-system).
* CO
2
emissions differ depending on power business establishments and fiscal years. When
calculating the emissions, refer to the web sites of power companies, etc., and set the
conversion coefficient of integrated power amount.
When calculating the currencies, refer to the web sites of power companies, etc., about power
charge per kWh and set the conversion coefficient of integrated power amount. When converting
into currencies other than Japanese Yen, set values considering their exchange rates.
z
Pulse conversion coefficient
PMU1A
(Electric
power)
PMU2A
(Power
two-system)
EMU8A
(Pulse/temperature)
CTD8E
(CT
expansion)
× ×
{
×
O: With setting X: Without setting
Targets for numerical conversion or conversion coefficients can arbitrarily be set to measure
discharge amounts, such as flow rate of exhaust gas, as conversion values.
»
Pulse conversion value
• Pulse conversion values can be obtained by the following calculation formula.
Pulse conversion value = Pulse input count X Pulse conversion coefficient
• Setting range: 0.01 to 9999.99 (Initial value: 1.00)
