UKT48213P20 Tesla UKT3-20A Changeover Switch Panel Mounted 4 Pole 3 Position 1-0-2 20 Amp

Description

Tesla UKT3-20A. 4 Pole 20A Panel Mount Changeover Switch. 1-0-2. 690V AC.

The Tesla UKT3-20A panel-mount changeover switch is a 4 pole 20 amp rotary cam switch with a 1-0-2 switching function — designed for mounting directly through a panel cutout in an existing switchboard or enclosure. The rotary operator provides Source 1 / Off / Source 2 selection, with a clearly engraved 1 0 2 position indicator on the front face. 690V AC rated. Compliant with VDE, DIN, IEC, UL, and CSA standards. Sold individually.

• Tesla UKT3 Series — Panel Mount Changeover Switch
• 4 pole — switches all 4 conductors simultaneously
• 20A rated current
• Switching function: 1-0-2 — Source 1 / Off / Source 2
• Front operated rotary switch — engraved 1 0 2 position markings
• Panel mount — fits through standard panel cutout in existing switchboard or enclosure
• No enclosure included — switchboard or enclosure mounting required
• Nominal operational voltage: 690V AC
• Rated frequency: 50/60Hz
• Compliant with VDE, DIN, IEC, UL, and CSA standards
• Sold individually

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What the Tesla UKT3-20A Panel Mount Changeover Switch Does

A changeover switch transfers a connected electrical load between two separate supply sources. In the 1-0-2 configuration, position 1 connects the load to Source 1, position 0 is the off position with both sources disconnected, and position 2 connects the load to Source 2. The rotary operator must pass through the off position when switching between sources, preventing both supplies from being connected simultaneously and providing a clear isolation point during the changeover.

The panel-mount version of the UKT3 changeover switch is the cam switch mechanism only — it mounts directly through a cutout in an existing switchboard door, panel face, or enclosure, with the rotary operator presented on the front face and the terminal block accessible from behind the panel. This is the appropriate choice when the switch is being integrated into an existing switchboard or custom enclosure, rather than installed as a standalone surface-mounted unit. For standalone surface or wall mounting without an existing enclosure, the equivalent enclosed version (UKT3-E20) is factory-mounted in a polycarbonate Fibox enclosure.

The 20A 4-pole rating makes the UKT3-20A suited to single-phase and three-phase changeover applications at 20A load current — smaller generator changeover installations, dual-supply arrangements, and auxiliary circuit switching in commercial and industrial switchboards. The 4-pole configuration simultaneously switches all four conductors for complete source isolation during changeover.

The Tesla UKT3 panel-mount range covers 20A (P20), 40A (P40), 63A (P63), and 100A (P100) in the 4-pole 1-0-2 configuration. The equivalent enclosed versions (E20, E40, E63, E100) are factory-mounted in polycarbonate Fibox enclosures for direct surface or wall mounting.

Q: What is the difference between the UKT3-P20 (panel mount) and the UKT3-E20 (enclosed)?
A: Both use the same UKT3 cam switch mechanism with the same 20A, 4-pole, 1-0-2 switching function. The UKT3-P20 is the switch mechanism only — it mounts through a panel cutout in an existing switchboard or enclosure. The UKT3-E20 is factory-mounted in a polycarbonate Fibox enclosure for direct surface or wall installation. Choose P20 for integration into an existing switchboard; choose E20 for standalone surface mounting.

Q: What does the 1-0-2 switching sequence mean on a changeover switch?
A: Position 1 connects the load to Supply Source 1 (typically the mains grid). Position 0 is the off position — both sources are disconnected from the load. Position 2 connects the load to Supply Source 2 (typically a generator or backup supply). The rotary operator passes through 0 between positions 1 and 2, preventing simultaneous connection of both supplies.

Q: Why use a 4-pole changeover switch for a single-phase installation?
A: A 4-pole switch simultaneously switches all four conductors including the neutral. In generator changeover applications, switching the neutral is important to prevent the generator neutral and grid neutral from being bonded together, which can cause issues in some generator earthing configurations. For installations where neutral switching is not required, a 3-pole version may be appropriate — consult a licensed electrician to confirm the correct configuration for your installation.

Warranty

This product is backed by an extended manufacturer warranty - click here for details.