Power Switches
in category: Power Switches
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Power Switches: I-0-II Changeover Switches for Mains and Generator
Our power switches are modular I-0-II (1-0-2) changeover switches from Hager. They switch manually between two power sources, for example the mains supply and a generator. The range covers single-phase and three-phase versions from 40 A to 63 A. It is intended for installers and panel builders who need a safe changeover in emergencies.
What you will find in this category
- Two-pole changeover switch, I-0-II, 2P 40 A 230 V AC (SFT240), common point from the top.
- Four-pole changeover switch, I-0-II, 4P 40 A 400 V AC (SFT440), DIN rail mounting, 4 modules wide.
- Modular power switch, I-0-II, 3P+N 63 A 400 V AC (SF463), for circuits up to 63 A.
How to choose
- Number of poles: choose 2P for 230 V AC circuits. Choose 4P or 3P+N for 400 V AC three-phase circuits.
- Rated current: the range offers 40 A and 63 A. Match the switch to the load of the circuit being switched.
- Voltage: the switches are rated for 230 V AC or 400 V AC at 50/60 Hz.
- Durability: the SFT440 is stated at 200,000 mechanical cycles and the SF463 at 100,000. Consider this if the switch will be operated often.
- Terminals: the SFT440 accepts cables of 1.5-16 mm2 with a tightening torque of 1.8 Nm. The SF463 lists 16 mm² for flexible wire.
Typical applications
These switches are used to change over between the mains and a generator. They also switch power and control circuits in emergency situations. The SFT440 is described as suitable for typical three-phase residential, commercial and light-industrial installations. The common point at the top makes wiring in the switchboard easier to organise.
Frequently asked questions
What does I-0-II (1-0-2) mean?
It is the switching arrangement of these devices. They are designed for manually switching between two power sources, for example the mains supply and a generator.
Which switch suits a three-phase installation?
The SFT440 (4P, 40 A, 400 V AC) and the SF463 (3P+N, 63 A, 400 V AC) are rated for 400 V AC. The SFT240 is a 2P, 230 V AC version.
How is the SFT440 mounted?
It mounts on a DIN rail and is 4 modules wide. The common point is brought out at the top.
Not sure which rating or pole count you need? Contact our technical support for help with selection.