SEL-T35
Time-Domain Power Monitor
The SEL-T35 streams high-precision ac and dc voltage and current measurements to Synchrowave software for wide-area, real-time data analysis. This data stream also includes energy packets calculated every millisecond, providing energy measurements independent of frequency and phase angles.
Up to 12 analog channels and 2 binary channels stream voltage and current data at 14.4 kilosamples per second (ksps) and energy calculations at 1 ksps. An integrated ride-through pack ensures that you never miss a disturbance during short-duration outages.
See the SEL-T35 and Synchrowave software in action with live data.
Starting At
$5,400 for SEL-T35#0001, including one SEL-5703 Synchrowave Monitoring license
Continuous Waveform Recording—The compact SEL-T35 streams data from up to four ac current inputs, four ac voltage inputs, and four dc inputs directly to SEL Synchrowave software for visualization and historian recording.
Triggerless Data Capture—Record waveforms and time-domain energy packets at up to 14.4 ksps without preconfigured triggers. Continuously stream data to capture faults, disturbances, and normal operations and archive up to several years of gapless data.
Flexible Data Acquisition—Low-level milliampere dc analog inputs to measure the output from third-party transducers, including temperature, solar irradiance, and high-energy dc voltage or current.
Seamless Event Ride-Through—The integrated ride-through pack protects the data stream from short-duration outages providing at least seven seconds of continued operation after the power supply input drops out.
Minimize the cost of harmonic mitigation with continuous waveform recording
David Renfro from Infiniti Integration Services describes SEL continuous waveform recording as the arbiter of truth and as a method for capturing all disturbances without custom event trigger logic. Learn how he optimizes filter designs for harmonics caused by variable-speed motor drives.
Continuous Waveform Streaming and Energy Packets: Capture Every Disturbance
Continuous waveform streaming and recording from SEL delivers gapless, full-bandwidth visibility into voltage, current, power, and energy transfer across your system. Unlike traditional digital fault recorders, continuous waveform data captures every event without relying on predefined trigger conditions.
As inverter-based resources and large load dynamics—like data centers—connect to the grid, system behavior grows increasingly complex. Sudden step changes can introduce voltage disruptions, frequency deviations, and power oscillations that trigger-based monitoring may miss.
The SEL continuous waveform recording system, powered by Synchrowave software, streams fixed-rate, time-synchronized data from the SEL-T35 Time-Domain Power monitor, sampling at 14.4 kilosamples per second (ksps). This high-resolution data meets Nyquist criteria for frequency-domain reproduction, eliminating the need for phasor approximations or frequency tracking. The result is high-fidelity measurements with wide bandwidth and precise time alignment.
Virtual Metering
Virtual metering enables power quality monitoring using existing devices — no extra hardware is needed. Leverage the Virtual Meters application with an installed SEL-T35 Time-Domain Power Monitor to calculate metering quantities from continuous waveform streaming data. It calculates fundamental and rms voltage, current, and power values as well as frequency and power factor.
Characterize Data Center Loads
Measure, identify, and visualize rapid power fluctuations and voltage oscillations commonly observed at data centers involved in AI training and inference.
Features
-
- 1
Type-C USB port
- 2
Color touchscreen display
- 3
Backlit pushbuttons
- 4
Power supply ride-through pack
1234(1)_v3.png?n=63897189073000)
-
-
- 1
Current inputs
- 2
Power supply inputs
- 3
Communications ports
- 4
Contact outputs
- 5
Analog inputs
- 6
Voltage inputs
- 7
Contact inputs and auxiliary voltage input
1234567
-
-
- 1
5-inch color touchscreen
- 2
Display voltage and current waveforms in real time.
12
-
-
- 1
Monitor power quality anywhere with the rugged SEL-T35. Synchrowave Monitoring software, running on a user-supplied laptop. Please contact SEL if interested in this option.
- 2
Clamp on CTs and clip-on voltage leads detect current and voltage disturbances.
12
-
Details
Continuous Waveform Streaming
Stream continuous oscillography at 14.4 ksps using a modified IEEE C37.118 format transmitted over high-bandwidth networks to SEL-5702 Synchrowave Operations Software or SEL-5703 Synchrowave Monitoring Software.
Energy Packet Streaming
The SEL-T35 data stream includes time-domain energy packets calculated every millisecond. This industry-exclusive energy packet technology captures energy measurements independent of frequency and phase angles, eliminating frequency-tracked delay or calculation issues with nonlinear signals. Positive energy packets represent energy delivered to the load. Negative energy packets represent the energy received from the load. Negative energy packets can indicate reduced system utilization.
DC Transducer Support
Four low-level milliampere (mA) dc analog inputs measure the output from third-party transducers, including temperature, solar irradiance, and high-energy dc voltage or current.
Synchrowave Analytics
Capture system faults and disturbances using external software without relying on preconfigured trigger conditions. Applications include archiving, user calculations, subsynchronous oscillation analysis, and equipment failure analysis.
Event Ride-Through
An integrated power supply ride-through pack continues to power the SEL-T35 for at least seven seconds if the power supply input drops out. This feature ensures that the SEL-T35 never misses an event during short-duration outages.
.jpg?n=63871279294000&preset=size-col-10&bp=lg)
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.
Sales Resource Central access is required to view the content in this tab.
Sales Resource Central