Atec Yokogawa-WT1800 - Manual (Page 14)

Specifications Specifications Specifications
Product Featur
es
Functions/Displays
Applications
Softw
ar
e
Comparisons
Explanations
Specifications
15
Display Items
Calculation Functions
Measurement Function
Single-phase
3-wire
3-phase
3-wire
3-phase 3-wire
(3-voltage 3-current
measurement)
3-phase
4-wire
Voltage U ∑ [V] (U1+U2)/2 (U1+U2+U3)/3
Current I ∑ [A] (I1+I2)/2 (I1+I2+I3)/3
Active power P ∑ [W] P1+P2 P1+P2+P3
Apparent Power S ∑
[VA]
TYPE1
TYPE2 S1-S2 3/2 (S1+S2) 3/3 (S1+S2+S3) S1+S2+S3
TYPE3 P ∑ 2 +Q ∑ 2
Reactive Power Q ∑
[var]
TYPE1 Q1+Q2 Q1+Q2+Q3
TYPE2 S ∑ 2 −P ∑ 2
TYPE3 Q1+Q2 Q1+Q2+Q3
Corrected Power Pc ∑ [W] Pc1+Pc2 Pc1+Pc2+Pc3
Integrated Power WP [Wh] WP1+WP2 WP1+WP2+WP3
Integrated Power (Positive)
WP+
∑ [Wh]
When WPTYPE is set to CHARGE/DISCHARGE
WP+1+WP+2
WP+1+WP+2+WP+3
When WPTYPE is set to SOLD/BOUGHT
Whenever data is updated, only the positive value of active power WP
∑ is
added
Integrated Power (Negative)
WP-
∑ [Wh]
When WPTYPE is set to CHARGE/DISCHARGE
WP-1+WP-2
WP-1+WP-2+WP-3
When WPTYPE is set to SOLD/BOUGHT
Whenever data is updated, only the negative value of active power WP
∑ is
added
Integrated Current q ∑ [Ah] q1+q2 q1+q2+q3
Integrated Current (Positive)
q+[Ah] q+1+q+2 q+1+q+2+q+3
Integrated Current (Negative)
q-
∑ [Ah]
q-1+q-2 q-1+q-2+q-3
Integrated reactive Power
WQ
∑ [varh]
Q ∑ (n) indicates the ∑ function of the nth reactive power, N indicates the
number of data updates, and the unit of Time is h
Integrated apparent Power
WS
∑ [VAh]
S ∑ (n) indicates the ∑ function of the nth apparent power, N indicates the
number of data updates, and the unit of Time is h
Power Factor ∑ P ∑ /S ∑
Phase angle Ø ∑ [°] COS -1 (P ∑ /S ∑ )
Note 1) The instrument’s apparent power (S), reactive power (Q), power factor ( λ), and phase difference (Ø)
are calculated using measured values of voltage, current, and active power.
(However, reactive power is calculated directly from sampled data when TYPE3 is selected.) Therefore,
when distorted waveforms are input, these values may be different from those of other measuring
instruments based on different measuring principals.
Note 2) The value of Q for each phase in the Q ∑ calculation is calculated with a preceding minus sign (-) when
the current input leads the voltage input, and a plus sign when it lags the voltage input, so the value of
Q
∑ may be negative.
Numerical Display
Measurement functions obtained for each input element
Item Symbol and Meaning g
Voltage (V) Urms: True RMS value, Umn: Rectifi ed mean value calibrated to the RMS value,
Udc: Simple mean value, Urmn: Rectifi ed mean value, Uac: AC component
Current (A) Urms: True RMS value, Imn: Rectifi ed mean value calibrated to the RMS value,
Idc: Simple mean value, Irmn: Rectifi ed mean value, Iac: AC component
Active power (W) P
Apparent power (VA) S
Reactive power (var) Q
Power factor λ
Phase angle (°) Ø
Frequency (Hz) fU (FreqU): Voltage frequency, fl (Freql): Current frequency
Three fU and fI of all elements included can be measured simultaneously.
A frequency measurement option allows you to simultaneously measure all fU and fIof
all elements.
Unselected signals are displayed with “………” indicating no data.
Maximum and minimum voltage values (V)
U+pk: Maximum voltage value, U-pk: Minimum voltage value
Maximum and minimum current values (A)
I+pk: Maximum current value, I-pk: Minimum current value
Maximum and minimum power values (W)
P+pk: Maximum power value, P-pk: Minimum power value
Crest factor CfU: Voltage crest factor, CfI: Current crest factor
Corrected power (W) Pc
Applicable standards
IEC76-1 (1976), IEC76-1 (1993)
Integration Time: Integration time
WP: Sum of the amount of both positive and negative power
WP+: Sum of positive P (amount of power consumed)
WP-: Sum of negative P (amount of power returned to the grid)
q: Sum of the amount of both positive and negative current
q+: Sum of positive I (amount of current)
q-: Sum of negative I (amount of current)
WS: Amount of apparent power
WQ: Amount of reactive power
However, the amount of current is integrated by selecting any one of Irms,Imn,Idc,Iac,
and Irmn depending on the setting of the current mode.
Inputs
Item Specification
Input terminal type Voltage
Plug-in terminal (safety terminal)
Current
• Direct input: Large binding post
• External current sensor input: Insulated BNC connector
Input type Voltage
Floating input, resistive potential method
Current
Floating input, shunt input method
Measurement range Voltage
1.5 V, 3 V, 6 V, 10 V, 15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V (for crest factor 3)
0.75 V, 1.5 V, 3 V, 5 V, 7.5 V, 15 V, 30 V, 50 V, 75 V, 150 V, 300 V, 500 V (for crest factor 6)
Current
• Direct input:
50 A input element
1 A, 2 A, 5 A, 10 A, 20 A, 50 A (for crest factor 3)
500 mA, 1 A, 2.5 A, 5 A, 10 A, 25 A (for crest factor 6)
5 A input element
10 mA, 20 mA, 50 mA, 100 mA, 200 mA, 500 mA, 1 A, 2 A, 5A (for crest factor 3)
5 mA,10 mA, 25 mA, 50 mA, 100 mA, 250 mA, 500 mA, 1 A, 2.5 A (for crest factor 6)
• External current sensor input:
50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V (for crest factor 3)
25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, 5 V (for crest factor 6)
Instrument loss Voltage
Input resistance :Approx. 2 M 1
Input capacitance :Approx. 10 pF
Current
• Direct input:
50 A input element: Approximately 2 m 1 + approximately 0.07 μH
5 A input element: Approximately 100 m 1 + approximately 0.07 μH
• External current sensor input: Approximately 1 M 1
Instantaneous maximum allowable input (20 ms or less)
Voltage
Peak voltage of 4 kV or RMS of 2 kV, whichever is lower
Current
• Direct input (50 A input element): Peak current of 450 A or RMS of 300 A,
whichever is lower
• Direct input (5 A input element): Peak current of 30 A or RMS of 15 A,
whichever is lower
• External current sensor input: Peak current is less than 10 times the range
Instantaneous maximum allowable input (1 second or less)
Voltage
Peak voltage of 3 kV or RMS of 1.5 kV, whichever is lower
Current
• Direct input (50 A input element): Peak current of 150 A or RMS of 55 A,
whichever is lower
• Direct input (5 A input element): Peak current of 10 A or RMS of 7 A,
whichever is lower
• External current sensor input: Peak current is less than 10 times the range
Continuous maximum allowable input
Voltage
Peak voltage of 2 kV or RMS of 1.1 kV, whichever is lower
If the frequency of the input voltage exceeds 100 kHz, (1200-f) Vrms or less
The letter f indicates the frequency of the input voltage and the unit is kHz.
Current
• Direct input (50 A input element): Peak current of 150 A or RMS of 55 A,
whichever is lower
• Direct input (5 A input element): Peak current of 10 A or RMS of 7 A,
whichever is lower
• External current sensor input: Peak current is less than 5 times the range
Continuous maximum common mode voltage (50/60 Hz)
1000 Vrms
Infl uence from common voltage
Apply 1000 Vrms for input terminal and case with the voltage input terminals shorted,
the current input terminals open, and the external current sensor input terminals
shorted.
• 50/60 Hz: ±0.01% of range or less
• Reference value up to 100 kHz: ±{(maximum rated range) / (rated range) Ч 0.001
Ч f% of range} or less. For external current sensor input, add max. rated range /
rated range Ч {0.0125 Ч log (f × 1000)-0.021}% of range. However, 0.01% or
more. The unit of f is kHz.
The maximum rated range within the equation is 1000 V or 50 A or 5 A or 10 V.
Line fi lter Select OFF, 100 Hz to 100 kHz (in increments of 100 Hz), 300 kHz, or 1 MHz
Frequency fi lter Select OFF, 100 Hz, or 1 kHz
A/D converter Simultaneous voltage and current input conversion
Resolution: 16-bit
Conversion speed (sampling period):
Approximately 500 ns. See harmonic measurement items for harmonic measurement.
Range switching A range can be set for each input element
Auto range functions Range up
• When the measured values of Urms and Irms exceed 110% of the range
• When the peak value of the input signal exceeds approximately 330% of the range
(or approximately 660% for crest factor 6)
Range down
When the following conditions are met, the range setting switches down.
• When the measured values of U RMS and I RMS fall to 30% or less of the range
• When the measured values of U RMS and I RMS fall to 105% or less of the lower
range (range to which the range setting switches down)
• When the measured values of Upk and Ipk fall to 300% or less of the lower range
(600% or less for crest factor 6)
Display p y
Item Specification
Display 8.4-inch color TFT LCD display
Total number of pixels* 1024 (horizontal) × 768 (vertical) dots
Display update rate
Same as the data update rate.
1) The display update interval of numeric display alone is 200 ms to 500 ms
(which varies depending on the number of display items) when the data update rate
is 50 ms, 100 ms, and 200 ms.
2) The display update interval of display items other than numeric display
(including custom displays) is approximately 1 second when the data update rate is
50 ms, 200 ms, and 500 ms.
*Up to approximately 0.002% of the pixels on the LCD may be defective.