SEL SEL-735 Power Quality and Revenue Meter

What are the key specifications for the SEL-735 meter?

The SEL-735 features AC current inputs of 0.001-22 A continuous, AC voltage inputs of 5-300 V, multiple I/O options including 4 digital inputs and outputs, and a power supply range of 85-264 Vac (50/60 Hz) or 85-275 Vdc. It operates at temperatures from -40° to +85°C and includes a 5-inch, 800 x 480 color touchscreen display with up to 1 GB of onboard memory.

How do I set up and install the SEL-735?

Mount the SEL-735 in a suitable enclosure ensuring NEMA 4X, IEC 529, and IP66 protection compliance. Connect the current and voltage inputs according to provided wiring diagrams with correct phase orientation, connect the power supply to designated terminals verifying voltage ratings match specifications, then use the touchscreen interface to configure metering parameters and communication settings.

What communication protocols does the SEL-735 support?

The SEL-735 supports multiple communication protocols including DNP3, Modbus, IEC 61850, and IEEE C37.118.1a-2014 for synchrophasor measurements. These protocols enable real-time situational awareness of system conditions and integration with various network configurations.

How do I troubleshoot when the SEL-735 display shows no display?

If the display is not showing, verify power supply connections and ensure the meter is receiving adequate voltage. Check that the power supply voltage and current ratings match the meter's specifications and that all connections are secure.

Can the SEL-735 be used for both revenue metering and power quality monitoring?

Yes, the SEL-735 is designed to provide accurate revenue metering while simultaneously offering comprehensive power quality analysis features. It captures and analyzes power quality disturbances including harmonics, voltage sags, swells, and interruptions.

What should I do if the SEL-735 is showing inaccurate readings?

Confirm correct wiring according to the provided wiring diagrams, ensure current transformers (CTs) and potential transformers (PTs) are properly installed, and calibrate the meter if necessary. Also verify that the connections are secure and appropriate for the voltage and current ranges being measured.