Sequoia / Tahoe Series User Manual California Instruments
22 M447352-01 REV-A
SQ0045 & TA0045 1% FS 10 W
Power
SQ0090 & TA0090
0 - 30 kW per output
Note: For current and power measurements, specifications apply from 5% to 100% of measurement
range. Current and Power range and accuracy specifications are times three for SQ0022 & TA0022,
SQ0030& TA0030, SQ0045 & TA0045, SQ0090 & TA0090 operated in single phase mode.
For the multi chassis models the current and power range accuracy specifications are to be multiplied by
No of chassis.
2.16 Operational Characteristics
Operational characteristics common for all three operation modes: Source mode, SINK-Grid Simulator
mode and SINK-Electronic Load mode. (SEQUOIA and TAHOE models)
Parameter Characteristic
Parallel Operation
Multi-chassis configurations could be formed with up to six units paralleled
using one Leader unit and up to five units operating as follower units.
Maximum power that can be obtained by paralleling is limited to 540 kVA.
Setup of the multi-chassis configuration is automatically accomplished when
the chassis are interconnected with the interface cables, and require no user
setup, except to wire the inputs and outputs.
Output Relays
Isolation and range relays are provided internally to automatically configure the
outputs, turn the output on/off, and disconnect the load from the output
amplifier when in the off state.
1-Phase and 3-Phase mode
selection
Switches between 1 and 3 phase outputs. SQ0022 & TA0022, SQ0030&
TA0030, SQ0045 & TA0045, SQ0090 & TA0090 (single chassis) models only.
Non-Volatile Memory 16 complete instrument setups and transient lists, 100 events per list.
Waveform Management
SEQUOIA/TAHOE series employs independent arbitrary waveform generator
for each phase, this allows the user to create custom waveforms. In addition,
three standard waveforms sine, square and clipped are always available.
Fault Identification On-board diagnostics identify when an assembly has experienced a fault.
Emergency Stop
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.
Watt Hour Measurement
Displays the energy, kWh, consumed by the load, and the true power in kW.
The Start and Stop function determine the interval during which energy is
calculated. The Clear function resets the accumulated energy value.
Calibration
Calibration interval is 1 year; calibration is firmware-based through the digital
interface or Virtual Panels.
Operational characteristics specific to Source mode (SEQUOIA and TAHOE models)
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