SECTION 2
SPECIFICATIONS
9
2.1.3 CURRENT LIMIT CONTROL SPECIFICATIONS
Current limit is provided for all phases through a single RMS current value. The range of this value is
equal to the ammeter range, as set by the AMPS TO VOLTS RATIO (
). This function is an average
responding, RMS-programmed function with a response time of approximately 100 mSec.
Range:
Amps to Volts ratio x 10 (divide by 3 for 3
Ф
power form)
(divide by 1.5 for single phase power sources containing 2 power amplifiers).
Resolution:
Range/2000 (.05%)
Accuracy:
±
1% of full scale over the full range of ambient conditions
2.1.4 CURRENT PROTECTION CONTROL SPECIFICATIONS
CURRENT PROTECTION offers the ability to disconnect power from a load if the current exceeds a set
value. A time delay setting is also provided to minimize nuisance disconnects due to momentary current
surge. When the CURRENT PROTECTION feature is enabled, the power source will normally operate in
constant voltage mode. If the load current exceeds the set Current Protect limit (IprA) for a time interval
that exceeds the protection delay setting (IprT), then the power source will generate a fault condition and
the output relay will open, disconnecting the load. An error message will be displayed when this event
occurs.
Threshold Level:
Range: Amps-to-Volts ratio x 10
Divide by 3 for 3 phase output form
Divide by 1.5 for 1 phase power source with 2 amplifiers
Resolution: 0.05% of full scale current
Accuracy: ±0.2% of full scale + Calibration Reference
Delay Time:
Range: 1
– 65535 (0.1 seconds – 109.22 minutes)
Resolution: 0.1 seconds (1 count = 0.1 second)
Accuracy: ±100 milliseconds
2.1.5 WAVEFORM CONTROL SPECIFICATIONS
The standard hardware configuration supports 16 waveforms with an option to store 128. There are also
16 pre-stored waveforms in the UPC EPROM which are available to initialize the 16 waveforms stored in
RAM. Each output phase is generated by one of the 16 waveforms stored in RAM.
Waveform 1 is always a Sine wave and cannot be changed. Waveforms 2-16 are editable. Waveforms
17-32 are pre-stored in the CPU EPROM. Waveforms 2-16 may be individually edited, or loaded from the
pre-stored waveforms (17-32) by copying, allowing creation of almost any waveform with the UPC,
including sub-cycle transients. See (
) for an example of creating a cycle-based transient that
performs waveform substitution for 1 cycle.
Each output phase may be independently generated from a separate waveform by creating a stored
program and specifying the waveform number for each phase within that program.
If the ERASE ALL RAM AND RESET CPU function is selected, waveforms 17 - 32 are subsequently
copied (as defaults) to waveforms 1-16 respectively as:
