8US1211-4SL00

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Siemens 8US1211-4SL00 is a SENTRON 60 mm busbar system device adapter designed to mount and connect 3VL3 circuit breakers up to 250 A onto a 60 mm centre-to-centre busbar arrangement. Built for use in low-voltage power distribution assemblies, it provides a compact mechanical interface with an overall width of 108 mm and length of 175 mm, and is intended for applications up to 690 V AC. The adapter suits TT-profile busbar configurations and is supplied with a terminal cover to support a tidy, enclosed installation within switchboards and control panels.

What is this accessory used for?

It is a device adapter that connects a compatible SENTRON VL circuit breaker to a 60 mm busbar system, providing a structured interface between the breaker terminals and the busbars.

Which busbar centre-to-centre spacing is it designed for?

It is designed for a 60 mm busbar system (60 mm busbar centre-to-centre spacing).

Which circuit breaker range is it suitable for?

It is suitable for SENTRON VL 3VL3 circuit breakers up to 250 A (commonly associated with the VL250 frame size).

What electrical ratings should be considered when selecting this adapter?

This adapter is specified for an operational current of 250 A and an operating voltage of up to 690 V AC (when used within the appropriate system configuration).

What are the key mechanical dimensions?

The adapter has a width of 108 mm and a length of 175 mm.

What is the approximate net weight?

The net weight is approximately 635.5 g.

What busbar thickness range can it accommodate?

It is intended for busbars with a thickness range of 5 mm to 10 mm, including TT profile arrangements as specified for the busbar system.

Does it include a terminal cover?

Yes. This version is supplied with a terminal cover, which helps provide a more complete assembled interface at the connection area.

Is reverse feeding (infeed from below) permitted with this adapter arrangement?

No. The associated assembly instructions for this adapter family specify line-side feeding from above for the 60 mm system configuration and state that infeed from below is not permitted.

Can it be used on a 40 mm busbar system?

No. This adapter is designed specifically for 60 mm busbar centre-to-centre spacing; a different adapter is typically used for 40 mm systems.

Are there any compliance markings associated with this component type?

This accessory family is listed as eligible for CSA component acceptance marking under the relevant industrial control sub-assemblies category (as applicable to the certified configurations).

What should be checked to confirm correct selection before installation?

Confirm the busbar system spacing (60 mm), the busbar thickness range, the compatible breaker type (SENTRON VL 3VL3 up to 250 A), and that the assembly requires the terminal-cover version (for example, 8US1211-4SL00).

  • Mounting a Siemens SENTRON 3VL3 circuit breaker (up to 250 A) onto a 60 mm busbar system within low-voltage switchboards
  • Creating a compact, standardised connection interface between 60 mm busbar assemblies and 3VL3 protection devices in panel builds
  • Retrofitting or reconfiguring distribution boards by adapting existing 60 mm busbar arrangements to accommodate a 3VL3 breaker frame size
  • Supporting modular panel layouts where multiple protective devices are arranged on a common 60 mm busbar backbone
  • Simplifying panel wiring and assembly by using a dedicated device adapter instead of bespoke busbar machining for 3VL3 installations
  • Building feeder sections in industrial distribution panels where a 3VL3 breaker is required for incoming or outgoing circuits on a 60 mm system
  • Standardising spares and panel variants across sites by using the same adapter format for 3VL3-to-busbar integration
  • Panel manufacturing where consistent dimensions and repeatable installation on 60 mm busbars are required for production builds

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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