Sel 735 Manual -

For technical documentation on the SEL-735 Power Quality and Revenue Meter, the official resources provided by Schweitzer Engineering Laboratories (SEL) include comprehensive instruction manuals, quick-start guides, and specific application notes.  Core Documentation Links 

Official SEL-735 Documentation Portal: The primary source for the latest Instruction Manual, Data Sheets, and firmware updates.

SEL-735 Quick-Start Guide: Ideal for initial wiring and basic setup.

Installation Guide: Detailed instructions for surface mounting, portable versions, and easily extractable meter (EXM) options.  Manual Content Overview 

The standard SEL-735 instruction manual typically includes the following sections:  SEL-735 Power Quality and Revenue Meter - Documentation

Critical Wiring Rules from the Manual:

1. Voltage Inputs (Terminals A, B, C, N): The SEL-735 operates at universal voltage (57 V to 240 V AC line-to-neutral). Do NOT exceed 300 V L-N or 600 V L-L.
2. Current Inputs (Terminals I1, I2, I3, IN): The device uses 5A or 1A secondary CTs. The manual explicitly warns: Never open circuit the secondary of a CT. Always short CT leads before disconnecting.
3. Power Supply: Terminals 18 & 19 (AC/DC control power). The manual specifies 125/250 V AC or 125 V DC. Using 480 V AC will destroy the unit instantly.

Chapter 1: Understanding the Structure of the SEL 735 Manual

Before diving into wiring, you must understand how the manual is organized. Unlike consumer electronics, the SEL manual uses a function-based index.

Error Code: Phase Rotation Error

• Meaning: ABC phase sequence is incorrect.
• Fix: Swap any two voltage leads (A & B) OR change the PHROT setting in the manual to "ACB."

Essential Commands to Memorize:

• ACC – Shows accumulated energy (kWh, kVARh).
• MET – Instantaneous metering (Volts, Amps, Watts, PF).
• WAV – Captures waveform (for power quality investigation).
• SET – Enter settings mode (password required, default: "SEL").