Mitsubishi Electric FR-F800 Series Instruction Manual page 330

NOTE
• Setting example for operation time rate: In the case where the average operation time per day is about 21 hours and the
average operation days per month is 16 days.
Annual operation time = 21 (h/day) × 16 (days/month) × 12 (months) = 4032 (h/year)
Therefore, set 46.03% in Pr.899.
• Calculate the annual energy saving from the value of [3 Average power saving] cumulated according to the setting of
Pr.899 Operation time rate (estimated value).
• When the power cost per hour is set in Pr.896 Power unit cost, the annual energy cost savings can be monitored.
The annual energy cost savings is determined by calculation using the following formula.
NOTE
• During regenerative driving, substitute the output power during the commercial power supply operation for the saved power
(therefore, input power = 0).
Parameters referred to
Pr.3 Base frequencypage 552
Pr.52 Operation panel main monitor
Pr.54 FM/CA terminal function
Pr.158 AM terminal function
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Operation time rate (%) =
24 (h/day) × 365 (days/year)
Annual power saving amount (kWh/year) =
Annual power cost saving = annual power saving amount (kWh/year) × Pr.896
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4032 (h/year)
× 100(%) ＝ 46.03%
With Pr.898 = 10 or 9999, average power
saving (kW) during cumulative period
Pr.899
× 24h × 365 days ×
100
5. PARAMETERS
5.8 (M) Item and output signal for monitoring
1
2
3
4
5
6
7
8
9
10
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