Sequoia / Tahoe Series User Manual California Instruments
24 M447352-01 REV-A
Automatic Level Control
(ALC)
User-selectable ALC operation enables a digitally implemented feedback
control loop to precisely regulate the RMS value of the output current.
Transient Generator-
SINK- Electronic Load Mode
Output could be controlled to produce transient events with 500 µs
programming resolution:
Current: drop, step, sag, surge, sweep;
RLC Programming-
SINK- Electronic Load mode
User can program Resistance, Inductance and Capacitance as load as per the
range specified for each output model. In this mode SEQUOIA programs the
RMS current with appropriate phase angle to the output as per the
programmed RLC values.
Non-Linear Current
Programming –
SINK- Electronic Load mode
Using current waveform programming feature, a nonlinear current example, six
pulse rectified current waveform can be programmed to the SEQUOIA output.
The highest peak current programmed is as defined by output repetitive peak
current rating.
2.17 Additional AC only Output Range Hardware options
Output Voltage Range Options – Only AC mode supported
- XVC, option Adds 444/555/666/721 V AC only output range.
SINK-Electronic load operating mode is not supported.
2.18 Additional Hardware options
-ES (Emergency Stop with
Key), option
This optional key lock push button is installed on the front panel of the
SEQUOIA / TAHOE system. When pushed in, the main AC contactor is
opened disconnecting the AC input power to the input transformer. Note
that the controller (and front panel display) will still be powered up, but no
power is available to the amplifiers and there will be no output power either.
The controller runs off the LV supply, which must be turned off with the front
panel unit ON/OFF switch.
413, Option
IEC 61000-4-13 harmonics and Inter-harmonics EMC test hardware and
software.
2.19 SINK option
Following output characteristics are applicable only for SEQUOIA model
-SINK-Grid Simulator, option
In Grid Simulator Mode SEQUOIA regulates the output voltage to the user
set value and works as the grid to UUT. SEQUOIA serve as the grid and
sinks the current generated by UUT. This allows the user to test current
source type UUT such as Photo Voltaic Solar inverter or any grid tied
inverter. User can change the grid parameters such as voltage, frequency,
and phase as per the requirement. The energy received from the UUT is fed
back to grid instead of dissipating as heat
-SINK- Electronic Load, option
In Electronic load mode SEQUOIA regulates the RMS current set by the
user and works as the load. Current programming, power programming and
RLC programming are supported in electronic load option. The energy
received from the UUT is fed back to grid instead of dissipating as heat.
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