The SEL-735 Power Quality and Revenue Meter is fully Class A-compliant to the IEC 61000-4-30 power quality standard. With reliable Class A measurement, operators can identify power system anomalies and isolate their source with confidence.
For high-accuracy revenue metering applications, the SEL-735 exceeds ANSI C12.20-2015 0.1 and IEC 62053-22:2003 0.2 accuracy class requirements over a wide current range. This makes the SEL-735 the premiere choice for generation, interchange, transmission, distribution, or industrial applications.
You can enhance the capabilities of SEL meters with acSELerator Meter Reports SEL-5630 Software. Meter Reports allows you to optimize your system by analyzing data, identifying usage trends, and diagnosing system problems.
Ensure Accurate Revenue Metering—Exceed ANSI C12.20 0.1 and IEC 62053-22 0.2 accuracy class requirements with bidirectional, full four-quadrant energy metering for generation, interchange, transmission, distribution, or industrial applications. Many new metering installations, such as distributed generation, operate over a wide current range. The SEL-735 accurately reports energy even in the presence of harmonics and distorted waveforms and provides high accuracy over an extended operating range.
Compensate for Errors in Instrument Transformers—Increase metering accuracy by compensating for instrument transformer errors. The SEL-735 interpolates six user-defined calibration points and corrects ratio and phase errors over the entire measurement range. You can decrease replacement and maintenance costs by compensating for each instrument transformer individually.
With the powerful combination of instrumentation transformer compensation and IEEE C37.118 synchrophasors, you can choose to correct delays and errors on each phase to achieve greater system accuracy.
Automate Data Reading (Time-of-Use)—Capture rate-based demand and energy consumption, configured with a user-defined calendar. A user-defined schedule instructs the meter to perform a particular action at a specified time, such as a self-read or demand reset. You can apply time-of-use metering to bill consumption at different rates based on season, day type, and time of day.
Measure and Report Reliable Power Quality Indicators—Ensure precise and reliable measurements with IEC 61000-4-30 Class A power quality compliance. You can size feeders appropriately, safeguard equipment, and plan upgrades using power quality indicators for predictive maintenance. The SEL-735 measures harmonics, interharmonics, flicker, power factor, voltage disturbances, K-factor, and other key power quality indicators.
Log Profile Data—Collect billing data with a simple-to-use load profile recorder that captures years of data. Independent load profile recorders in the SEL-735 allow simultaneous meter and power quality logging of up to 512 analog channels for up to 20 years. The SEL-735 can trend averages, minimums, maximums, changes, and snapshots at a rate as often as every three seconds.
Capture Waveforms and Trigger Records—Record up to 10,000 oscillography events associated with programmable trigger conditions, such as a voltage interruption. You can also capture real-time voltage and current signals in both the time and frequency domains with the Wave View oscillography functionality.
Voltage Sag, Swell, and Interruption Logging (VSSI)—Enabled from the factory, the VSSI recorder time-stamps voltage excursions with up to 4 ms resolution and records indefinitely using an adaptive sampling rate. Settings include trigger thresholds from ±3 percent to ±100 percent of the actual value and an automatic recording duration dependent on the length of the voltage excursion.
Customizable three-line or single-line display
Customizable scaling and formatting
Simple front-panel navigation
Six programmable LEDs
Custom local controls
ANSI Type II optical port or EIA-232 port
Custom nameplate and barcode
Power supply board: 2 inputs, 3 outputs
Main board: RJ45 copper or fiber-optic Ethernet, EIA-232, IRIG-B, EIA-232/-485
Communications board (Expansion Slot #1): EIA-485, telephone modem, EIA-232
I/O board (Expansion Slot #2): 4 inputs, 4 outputs (solid-state or electromechanical); or 4 analog outputs, 4 solid-state outputs
CT board: Ia, Ib, Ic
PT board: Va, Vb, Vc, Vn
The SEL-735 exceeds the requirements of ANSI and IEC accuracy standards over a wide current range. Capable of reliable and precise metering even in the presence of harmonics, the SEL-735 exceeds the 0.1 accuracy class requirements of ANSI C12.20-2015.
Load Profile Data Collection
You can collect billing data with a simple-to-use load profile recorder that captures years of data.
The SEL-735 integrates seamlessly into Itron MV-90 billing software, IEC 61850, DNP3, IEEE C37.118-2011, Modbus, or SEL communications architectures. Multiple communications ports and protocols enable the SEL-735 to simultaneously communicate with up to ten devices.
IEEE C37.118-2011 Synchrophasors
|IEEE C37.118-2011 Synchrophasor Performance Class Summary|
|Standard Compliance||IEEE C37.118-2011|
|Reporting Rates||1 to 60 messages/second for 60 Hz systems |
1 to 50 messages/second for 50 Hz systems
|Phasor Quantities||Phase and positive sequence components|
|Digital Status Bits||16|
|Optional Analogs||Four user-defined quantities including rms values|
|Server Outputs||1 to 2 sessions at 60 (or 50) messages/second|
Instrument Transformer Compensation
The SEL-735 is the only SEL product to provide both angular and magnitude compensation for instrument transformer errors. Correct delays and errors on each phase to achieve high-performance system accuracy, even when using protection-grade transformers. The SEL-735 is equipped with the powerful combination of IEEE C37.118 and Instrument Transformer Compensation (ITC), so you can choose to apply correction at either the synchrophasor interface or all metering interfaces, providing flexibility for many applications.
IEC 61850 GOOSE and MMS
Using IEC 61850 GOOSE, the SEL-735 can communicate peer to peer with another device to exchange metering, power quality, or control data in real time over Ethernet. Or, it can use MMS to report to an MMS client, such as a SCADA master.
Transformer and Line-Loss Compensation
By entering transformer nameplate and line impedance information directly into the meter, you can automatically compensate for transformer or line losses and move the billing point.
Time-of-Use (TOU) Metering
You can report flexible, time-differentiated energy and demand registers with multiple day types, rates, and seasons as well as a 20-year programmable calendar.
With the predictive demand function, you can monitor accumulated demand and alarm when the demand exceeds a user-defined limit. The SEL-735 can then shut down loads or peak-shave with generation to avoid demand charges. The predictive demand alarm is available through IEC 61850, Modbus, DNP3, Mirrored Bits communications, and the front-panel LEDs.
Flexible Mounting Options
A variety of bezels, brackets, enclosures, and rack-mount kits are available for quick, easy, and clean-looking retrofit installations and mounting flexibility.
Basic Revenue and Power Quality (PQ) Metering
Intermediate Revenue and PQ Metering
Enhancements from Basic:
Advanced Revenue and PQ Metering
Enhancements from Intermediate:
Product Feature Comparison
SEL-734 and SEL-735 Comparison Chart
Power Quality and Recording Options
Choose from three power quality options to fit any application and budget.
|Memory||128 MB||256 MB||1 GB|
|Max Harmonic Order||15th||63rd||63rd|
|Samples Per Cycle||16||16, 128||16, 128, 512|
|Number of Events||256||33–6,000||101–10,000|
|Wave View Oscillography||No||No||Yes|
|Load Profile Data|
|Recorders × Channels||1 × 16||12 × 16||32 × 16|
|Acquisition Rates||1–120 min||3–59 s, 1–120 min||3–59 s, 1–120 min|
|Storage Duration||0–10 years, varies with acquisition rate and number of channels used||0–20 years, varies with acquisition rate and number of channels used||0–20 years, varies with acquisition rate and number of channels used|
|Example Duration||10 years for 16 channels logged every 10 min||20 years for 16 channels logged every 10 min||20 years for 16 channels logged every 10 min|
|Voltage Sag, Swell, Interruption (VSSI) Recorder|
|Typical Number of Summary Events||270||270||600|
|Number of Detailed Rows||60,000||60,000||>130,000|
|Minimum Disturbance Duration||1/4 cycle||1/4 cycle||1/4 cycle|
|Sampling Rate||4 samples/cycle; 1 sample/day, adaptive||4 samples/cycle; 1 sample/day, adaptive||4 samples/cycle; 1 sample/day, adaptive|
|Sequential Events Recorder (SER)|
|Number of Events||>80,000||>80,000||>80,000|
|Number of Channels Monitored||≤72||≤72||≤72|
|IEC 61000-4-30 PQ Compliance|
|150/180-Cycle, 10-Minute, 2-Hour||-||Class A||Class A|
|Flicker||-||Class A |
(10-min, 2-hr updates)
|Class A |
(1-min, 10-min, 2-hr updates)
|Voltage Harmonics||-||-||Class A|
|Current Harmonics||-||-||Class A|
|Product||Revision||Z Number||Minimum Software Version|
|Supports Forms 5, 36, and 9|
|Supports Forms 5, 36, and 9|