Basler Electric DGC-2020 - Manual (Page 32)

Measurement/Calculation Methods
Total .................................................. kVA = (V
L-L
× I
L
×√3) ÷ 1000
4-Wire, Line-to-Neutral ..................... kVA calculated with respect to neutral
3-Wire, Line-to-Line .......................... A-phase kVA = V
AB
× I
A
÷ 1000 ÷ √3
B-phase kVA = V
BC
× I
B
÷ 1000 ÷ √3
C-phase kVA = V
CA
× I
C
÷ 1000 ÷ √3
Accuracy ...........................................
±3% or the full-scale indication or ±2 kVA ∗†
∗ kVA metering indicates 0 kVA when the generator kVA is below 2% of the full-scale rating.
† Applies when temperature is between
−40°C to +70°C.
Power Factor
Metering Range ................................ 0.2 leading to 0.2 lagging
Calculation Method ........................... PF = cosine of the angle between phase AB voltage (Vab) and
phase A current (Ia)
*
Accuracy ...........................................
±0.02 †
* In single-phase AC-connected machines, it is the cosine of the angle between phase CA voltage
(Vca) and phase C current (Ic).
† Applies when temperature is between –40
°C to +70°C (–40°F to +158°F).
NOTE
For the DGC-2020 to correctly meter power factor, the generator must be
rotating clockwise (A-B-C).
Real Power
Indicates total kW and individual line kW (4-wire, line-to-neutral or 3-wire line-to-line)
Measurement/Calculation Methods
Total .................................................. PF
× Total kVA
4-Wire, Line-to-Neutral ..................... kW calculated with respect to neutral
3-Wire, Line-to-Line .......................... A-phase kW = V
AB
× I
A
× PF ÷ 1000 ÷ √3
B-phase kW = V
BC
× I
B
× PF ÷ 1000 ÷ √3
C-phase kW = V
CA
× I
C
× PF ÷ 1000 ÷ √3
Accuracy ...........................................
±3% of the full-scale indication or ±2 kW ∗†
∗ kW metering indicates 0 kW when the generator kW is below 2% of the full-scale rating.
† Applies when temperature is between –40
°C to +70°C.
Oil Pressure
Metering Range ................................ 0 to 150 psi, 0 to 10.3 bar, or 0 to 1,034 kPa
Accuracy ...........................................
±3% of actual indication or ±2 psi, ±0.12 bar, or ±12 kPa (subject to
accuracy of sender)
Display Resolution ............................ 1 psi, 0.1 bar, or 1 kPa
Coolant Temperature
Metering Range ................................ 32 to 410
°F or 0 to 204°C
Accuracy ...........................................
±3% of actual indication or ±2° (subject to accuracy of sender)
Battery Voltage
Metering Range ................................ 6 to 32 Vdc
Accuracy ...........................................
±3% of actual indication or ±0.2 Vdc
Display Resolution ............................ 0.1 Vdc
1-8 DGC-2020 General Information 9400200990 Rev X