Product Introduction

The TOMZN TO119G/TO219G/TO319G/TO419G series are manual transfer switches (MTS) designed for safe and reliable switching between two independent power sources, such as utility and generator, at 400V AC and 80A. Available in 1P, 2P, 3P, and 4P configurations, these switches feature a three-position operation (I / Off / II) with clear mechanical interlocking to prevent simultaneous connection of both sources. The middle position provides complete isolation. Terminal connections follow a standard pattern: Position I connects input to source 1; Position II connects input to source 2. Incoming and outgoing wire positions are adjustable; for dual power switching, lower input and upper output must be used. Robust construction and DIN rail mounting make them ideal for residential, commercial, and industrial power transfer applications.

Product Data Sheet

Product series: TO119G / TO219G / TO319G / TO419G

Type: Manual Transfer Switch (MTS)

Number of poles: 1P (TO119G), 2P (TO219G), 3P (TO319G), 4P (TO419G)

Rated current: 80A

Rated voltage: 400V AC

Handle positions: I (Source 1), Off (middle, both groups disconnected), II (Source 2)

TO119G connections: Position I: 1-2 connected; Position II: 1-4 connected

TO219G connections: Position I: 1-2 & 5-6; Position II: 1-4 & 5-8

TO319G connections: Position I: 1-2, 5-6, 9-10; Position II: 1-4, 5-8, 9-12

TO419G connections: Position I: 1-2, 5-6, 9-10, 13-14; Position II: 1-4, 5-8, 9-12, 13-16

Wiring flexibility: Incoming/outgoing wire positions adjustable; for dual power switching, lower in and upper out must be used

Mounting: 35mm DIN rail

Application: Switching between utility and generator, dual power supply systems