Delta MS 300M - Display Solar Power Calculator Specifications download pdf (Page 16)

Fundamental

the PLL Source

(Hz)

10 to 20

20 to 40

40 to 55

55 to 75

75 to 150

150 to 440

440 to 1100

1100 to 2600

Sample Rate

(S/s)

f × 3000

f × 1500

f × 900

f × 750

f × 450

f × 360

f × 150

f × 60

Window Width against

the FFT Data Length

(Frequency of the

Fundamental Wave)

150

Upper Limit of the

Measured Order

100

On models with the advanced computation (/G6) option

Frequency

10 Hz  f  30 Hz

30 Hz  f  66 Hz

66 Hz  f  440 Hz

440 Hz  f  1 kHz

1 kHz  f  2.5 kHz

2.5 kHz  f  3.5 kHz

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.2% of reading + 0.15% of range

0.5% of reading + 0.15% of range

1.2% of reading + 0.15% of range

2.5% of reading + 0.15% of range

8% of reading + 0.15% of range

Power

±(reading error + measurement

range error)

0.5% of reading + 0.4% of range

0.4% of reading + 0.15% of range

1.2% of reading + 0.15% of range

2% of reading + 0.15% of range

6% of reading + 0.2% of range

16% of reading + 0.3% of range

• When the line filter (5.5 kHz) is ON

Frequency

10 Hz  f  30 Hz

30 Hz  f  440 Hz

440 Hz  f  2.5 kHz

2.5 kHz  f  5 kHz

5 kHz  f  7.8 kHz

Voltage and Current

±(reading error + measurement

range error)

0.25% of reading + 0.3% of range

0.2% of reading + 0.15% of range

1% of reading + 0.15% of range

2% of reading + 0.15% of range

3.5% of reading + 0.15% of range

Power

±(reading error + measurement

range error)

0.45% of reading + 0.4% of range

0.4% of reading + 0.15% of range

2% of reading + 0.2% of range

4% of reading + 0.2% of range

6% of reading + 0.2% of range

• When the line filter (50 kHz) is ON

Frequency

10 Hz  f  30 Hz

30 Hz  f  440 Hz

440 Hz  f  2.5 kHz

2.5 kHz  f  5 kHz

5 kHz  f  7.8 kHz

Voltage and Current

±(reading error + measurement

range error)

0.15% of reading + 0.3% of range

0.1% of reading + 0.15% of range

0.6% of reading + 0.15% of range

1.6% of reading + 0.15% of range

2.5% of reading + 0.15% of range

Power

±(reading error + measurement

range error)

0.25% of reading + 0.4% of range

0.2% of reading + 0.15% of range

1.2% of reading + 0.2% of range

3.2% of reading + 0.2% of range

5% of reading + 0.2% of range

• When the line filter is OFF

• FFT Function Specifications

Item Specifications

Computed source Voltage, current, active power, and reactive power of each input

element.

Active power and reactive power of an Σ wiring unit.

Torque and speed signals (analog input) of motor input (option).

Type PS (power spectrum)

Number of computations Two computations (FFT1 and FFT2)

Maximum frequency of 100 kHz

analysis

Number of points 20,000 points or 200,000 points

Measurement period for 100 ms or 1 s

the computation

Frequency resolution 10 Hz or 1 Hz

Window function Rectangular, Hanning, or Flattop

Anti-aliasing filter Set using a line filter (OFF, 500 Hz, 5.5 kHz, or 50 kHz).

Sampling clock Fixed to 200 kHz

Display update Data update rate or (measurement period of the FFT + FFT

computing time), whichever is longer

* The measurement period is 1 s when the number of FFT points is 200 k (when the frequency

resolution is 1 Hz).

The measurement period is 100 ms when the number of FFT points is 20 k (when the

frequency resolution is 10 Hz).

• Harmonic Measurement in Normal Measurement

Item Specifications

Measured source All installed elements

Format PLL synchronization method

Frequency range Range in which the fundamental frequency of the PLL source is 10

Hz to 2600 Hz

PLL source • Select the voltage or current of each input element (external

current sensor range is greater than or equal to 500 mV) or the

external clock (Ext Clk).

• Input level

Greater than or equal to 50% of the measurement range rating

when the crest factor is 3

Greater than or equal to 100% of the measurement range rating

when the crest factor is 6

•Turn the frequency filter ON when the fundamental frequency is

less than or equal to 440 Hz.

FFT data length 9000

FFT processing word 32 bits

length

Window function Rectangular

Anti-aliasing filter Set using a line filter (5.5 kHz or 50 kHz).

Note) To measure and display harmonic data requires a data update rate of 500 ms or

Sample rate (sampling frequency), window width, and upper limit of measured order during

PLL synchronization

Accuracy

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the

voltage and current accuracy and 1% of reading to the power accuracy when the frequency

exceeds 1 kHz.

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the

voltage and current accuracy and 1% of reading to the power accuracy when the frequency

exceeds 1 kHz.

If the fundamental frequency is between 1 kHz and 2.6 kHz, add 0.5% of reading to the

voltage and current accuracy and 1% of reading to the power accuracy when the frequency

exceeds 1 kHz.

However, all the items below apply to all tables.

•When averaging is ON, the averaging type is EXP, and the attenuation constant is greater

than or equal to 8.

• When the crest factor is set to 3

• When λ (power factor) = 1

• Power exceeding 440 Hz are reference value.

• For external current sensor range, add 0.2 mV to the current accuracy and add (0.2 mV/

external current sensor range rating)×100% of range to the power accuracy.

• For 30A direct current input range, add 0.2 mA to the current accuracy and add (0.2 mA/

direct current input range rating)×100% of range to the power accuracy.

• For 2A direct current input range, add 2 µA to the current accuracy and add (2 µA/direct

current input range rating) × 100% of range to the power accuracy.

• For n

order component input, add {n/(m+1)}/50% of (the n

order reading) to the n+m

order and n-m

order of the voltage and current, and add {n/(m+1)}/25% of (the n

order

reading) to the n+m

order and n-m

order of the power.

• Add (n/500)% of reading to the nth component of the voltage and current, and add (n/

250)% of reading to the n

component of the power.

• Accuracy when the crest factor is 6: The same as when the range is doubled for crest

factor 3.

• The accuracy guaranteed range by frequency and voltage/current is the same as the

guaranteed range of normal measurement.

If the amplitude of the high frequency component is large, influence of approximately 1%

may appear in certain orders. The influence depends on the size of the frequency

component. Therefore, if the frequency component is small with respect to the range rating,

this does not cause a problem.

• Waveform Sampling Data Saving Function

Parameters Voltage waveform, current waveform, analog input waveform of

torque and speed waveform calculation, FFT performing data

Data type CSV format, WVF format

Storage PCMCIA, USB memory (/C5 option)

* Waveform calculation function (MATH) cannot be used with FFT

calculation at the same time.

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Delta MS 300M - Display Solar Power Calculator Specifications Page 16

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