D20Ac, Ac Analog Input Peripheral - GE D20 Technical Overview

D20/D200 Technical Overview

2.4.11 D20AC, AC Analog Input Peripheral

The D20AC, AC analog input peripheral provides AC analog computing and monitoring. It has
the following features and specifications:
Item
Features
DSP/Memory
AC Voltage Inputs
Accuracy
Burden
Measurement Range
Continuous Over voltage
Frequency Response
Sample Rate
AC Current Inputs
Accuracy
Burden
Thermal Overload
62
Table 18 D20AC Features and Specifications
Up to 132 analog values and 18 accumulator values.
Accommodates direct AC analog inputs from current and voltage
transformers for up to three 3-phase circuits, eliminating the need for
transducers and/or metering IEDs
Integrates key substation functions such as metering, analog processing
and power quality measurement
3-element and 1-element (Balance System) metering
Meter calculations include kW, kVAR, power factor, frequency, kWh,
kVARh, kVAh and symmetrical components.
Power quality data: %THD (total harmonic distortion), 21
24-bit program, 16-bit point data
16 MHz clock
1K x 16-bit internal data
2K x 24-bit internal program
14K x 24-bit external program
64K byte EPROM boot
Dual-port memory 2K bytes
CCU base system required
Up to 6 nominal RMS inputs: 63.5 VAC, 110 VAC (60 Hz), 69.3 VAC, 120
VAC (60 Hz)
+ 0.2% of nominal full scale
< 0.1 VA
250% of nominal
250% of nominal
50/60 Hz filtered, 1300 Hz unfiltered
64 samples per cycle
Up to 9 nominal RMS inputs: 1.0 A or 5.0 A (50/60 Hz)
•
+ 0.2% of nominal (minimum input 2% of nominal)
•
+ 1.0% 5 x nominal full scale
•
+ 2.0% 10 x nominal full scale
•
+ 3.0% 16 x nominal full scale
<0.01 ohm
•
4 x nominal – continuous
•
30 x nominal – 10s
•
100 x nominal – 1 s
PRPI-019-3.00-10
GE Grid Solutions
Description
st
harmonic
GE Information