SECTION 2
SPECIFICATIONS
12
2.2
METERING SPECIFICATIONS
2.2.1 VOLTMETER SPECIFICATIONS
Three voltmeter inputs are provided, one per phase. Both Voltage Line-to-Neutral (VLN) and Voltage Line-
to-Line (VLL) voltages are metered.
Vrms Meter Range:
354 VLN, 708 VLL A.C.
Display Resolution:
0.1 VAC rms.
The Remote interface may provide up to 3 digits of precision
(digits to the right of the decimal point).
Accuracy (50-500 Hz):
± 0.25% of r 0.1% F.S. @ 25°C
Accuracy (20-5000 Hz):
± 0.5% F.S. @ 25° to 50°C.
NOTE
: Some voltage may be displayed with NO LOAD attached due to the sensitivity of the metering
circuits.
NOTE
: Power source voltmeter scaling is internally fixed at 50:1,
e.g. 50 VAC at load = 1 VAC input to UPC = 50 VAC displayed.
2.2.2 AMMETER SPECIFICATIONS
Up to three ammeter inputs are provided, one per phase. Both Peak and RMS values are displayed.
Current crest factor is displayed as the ratio: Ipk/Irms.
Amp Meter range:
Amps to Volts ratio x 10 (divided by 3 if 3
Ф
form is used)
NOTE
: AMPS TO VOLTS RATIO is set by a switch located on
the UPC METERING PCB (
). This ratio may be displayed
with the UPC STATUS display (
fn
,3,3).
DISPLAY
Range:
0.01 to 99.99 Amps, RMS or Peak.
DISPLAY
Resolution:
0.01 Amps rms or peak. The Remote interface may provide 3
digits of precision (digits to the right of the decimal point).
Accuracy (50-500 Hz):
± 0.25% of r 0.1% F.S. @ 25°C
Accuracy (20-5000 Hz):
± 0.5% F.S. @ 25° to 50°C.
NOTE
: Some minimal load current may be displayed with NO LOAD attached due to the sensitivity of the
metering circuits.
2.2.3 kVA METER SPECIFICATIONS
kVA metering is provided by multiplying the metered volts times the metered amps values. Display range
and resolution is XXX.XXX kVA. The Remote interface may provide 3 digits of precision (digits to the right
of the decimal point).
Accuracy is ± 1% of full scale over the full range of ambient conditions.
2.2.4 KILOWATT METER SPECIFICATIONS
True kilowatt metering is calculated using the voltmeter and ammeter data. Display range and resolution is
XXX.XXX kW. The Remote interface may provide 3 digits of precision (digits to the right of the decimal
point).
Accuracy is ± 1% of full scale over the full range of ambient conditions.
