This document is an addendum to the User Manual of Smart Relay SRW 01, providing information on installation, connection, parameterization, and operation modes.
The addendum supplements the original SRW 01 Smart Relay manual (version 1.3X) by describing the changes introduced with firmware version V2.0X. It adds new hardware parameters, protection functions, and expanded digital I/O capabilities.
Key sections cover electrical installation, earth‑leakage sensor connection, protection configuration, operation modes (transparent, overload, starter types, PLC), communication settings (Modbus‑RTU), diagnostics, and mechanical data such as sensor dimensions and terminal specifications.
| Earth Current Ranges | 0.3 – 5 Aac |
|---|---|
| Leakage Nominal Isolation Voltage | 690 Vac |
| Sensor (ELS) IEC Rating | 680 Vac |
| Impulse Strength | 6 kV |
| Frequency Range | 50/60 Hz |
| Application | Single‑phase and three‑phase |
| EL1 Sensor Diameter | 36 mm |
| EL2 Sensor Diameter | 70 mm |
| Torque for Terminal Screws | 0.29 Nm |
It refers to firmware version V2.0X.
Six programmable reading parameters can be read sequentially.
An external earth‑leakage sensor (ELS) can be connected to terminals S1 and S2 for protection.