Ensure Accurate Revenue Metering—Exceed ANSI C12.20 0.2 class accuracy 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 Power Quality and Revenue Meter is three times as accurate as ANSI C12.20 Accuracy Class 0.2 requirements, 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. 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, customers 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. 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 power quality compliance. 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 192 data channels. Trend averages, minimums, maximums, changes, and snapshots at a rate as often as every three seconds.
Capture Waveforms and Trigger Records—Record approximately 3,000 events associated with programmable trigger conditions, such as a voltage interruption. Enabled from the factory, the voltage sag, swell, and interruption (VSSI) recorder time-stamps voltage excursions with up to 1 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 automatic recording duration dependent on the length of the voltage excursion.
Exceed ANSI C12.20 0.2 class accuracy with bidirectional, full four-quadrant energy metering for generation, interchange, transmission, distribution, or industrial applications.
Load Profile Data Collection
Collect billing data with a simple-to-use load profile recorder that captures years of data.
Integrate 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||1-2 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. Equipped with the powerful combination of IEEE C37.118 and Instrument Transformer Compensation (ITC), customers can choose to apply correction at either the synchrophasor interface or all metering interfaces, providing flexibility for many applications.
IEC 61850 GOOSE and MMS
Use GOOSE to communicate peer to peer with another device to exchange metering, power quality, or control data in real time over Ethernet. Or, use MMS to report to an MMS client, such as a SCADA master.
Transformer and Line-Loss Compensation
Enter transformer nameplate and line impedance information directly into the meter to automatically compensate for transformer or line losses and move the billing point.
Time-of-Use (TOU) Metering
Report flexible, time-differentiated energy and demand registers with multiple day types, rates, seasons, and a 20-year programmable calendar.
Monitor accumulated demand with the predictive demand function, 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, or 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.