ABB OTC30G3-3BS 30 A 3-pole I-0-II manual change-over switch with base or DIN rail mounting and a padlockable direct-mounted handle.
The ABB 1SCA162739R1001, also known as the OTC30G3-3BS, is a robust 30 A 3-pole manual change-over switch designed for dependable transfer between two independent electrical power sources. Part of the ABB OT Plus change-over switch range, it is suitable for generator change-over panels, distribution systems, industrial control equipment and OEM machinery.
Its front-operated I-0-II mechanism allows an electrical load to be connected to either of two supplies, with a defined OFF position between them. This break-before-make operation helps prevent the two power sources from being connected simultaneously during manual transfer.
The OTC30G3-3BS features a compact G3 frame, integrated screw terminals and a direct-mounted padlockable knob handle. It supports base mounting and DIN rail installation, while an optional operating shaft can be fitted for external operation through an enclosure door.
The ABB OTC30G3-3BS enables an electrical load to be transferred manually between two separate supplies, such as the normal mains source and a standby generator. Its positive I-0-II switching sequence provides a clearly defined OFF position between the two connected sources.
The three-pole arrangement is designed for switching three-phase conductors simultaneously. Its compact construction and flexible mounting options make it suitable for both new panel designs and replacement applications where dependable manual source selection is required.
| Manufacturer | ABB |
|---|---|
| Series | OT Plus Change-Over Switches |
| Model | OTC30G3-3BS |
| Manufacturer Part Number | 1SCA162739R1001 |
| Product type | Manual change-over switch |
| Rated current | 30 A |
| Number of poles | 3 |
| Operating positions | I-0-II |
| Switching sequence | Break before make |
| Frame size | G3 |
| Operation | Front operated |
| Mounting type | Base or DIN rail mounting |
| Terminal type | Integrated screw terminals |
| Conductor material | Copper |
| Handle type | Padlockable direct-mounted knob handle |
| Padlock diameter | Up to 6 mm |
| External operation | Optional operating shaft available |
| EAN | 6417019928074 |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
The OTC30G3-3BS is used to transfer a three-phase electrical load manually between two independent power sources, such as a mains supply and a standby generator.
The ABB OTC30G3-3BS has a rated current of 30 A.
This model has a 3-pole configuration for simultaneously switching three-phase conductors.
Position I connects the load to the first supply, position 0 disconnects the load and position II connects it to the second supply.
Yes. The unit is designed for either base mounting or DIN rail mounting.
Yes. A direct-mounted padlockable knob handle is supplied. A separate shaft may be used for external enclosure-door operation.
ABB OT Plus change-over switches are trusted by panel builders, electrical contractors and OEM manufacturers for dependable source selection, compact installation and reliable industrial performance.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...