Prefabrication of switchgear and the need for high-quality components

In modern prefabrication of control cabinets and low-voltage switchgear, reliability, ease of installation, and the ability to quickly configure and service play a key role. Prefabrication processes are becoming increasingly automated and require components that enable standardization and flexible adaptation to changing design requirements.

One such component is the Phoenix Contact PTCB series of connectors and electronic switches, which are fully compatible with the CLIPLINE complete system. This solution has been designed for 24 V DC applications and demanding industrial environments.

CLIPLINE complete – a modular system for all prefabrication

The CLIPLINE complete system is a universal approach to connecting cables in control cabinet installations. It supports various connection technologies (screw, push-in, spring), allowing you to choose the most convenient solution for your specific application.

In 2024, the CLIPLINE complete system celebrated its 25th anniversary. Since the introduction of the first ST connector series in 1999, Phoenix Contact has consistently developed this platform, combining different connection technologies in a single, coherent system. Over the years, further series have been added, including UT (screw), QT (spring), and solutions with Push-in technology and the latest Push-X. Thanks to a uniform system of bridges, markers, and test accessories, CLIPLINE complete has become a global standard in the field of control cabinet prefabrication, ensuring compatibility, order, and reduced storage and logistics costs.

The 25th anniversary confirms that CLIPLINE complete is not just a connector system, but the foundation of modern industrial electrical engineering.

Key features of the system:

• compatibility with all common connection types,
• easy potential separation,
• wide range of system accessories,
• high mechanical and thermal resistance,
• aesthetic cable routing and orderly structure of current paths.

This solution significantly speeds up installation, simplifies servicing, and supports the standardization of prefabrication processes, especially in series production.

PTCB – electronic circuit breakers for DIN rails

The PTCB E1 24DC series are single-pole electronic circuit breakers designed to protect loads in 24 V DC networks. These devices combine the functions of a fuse and a relay in one, eliminating the need for additional protection and saving space in the cabinet.

Each PTCB module is mounted directly on a DIN rail, allowing for easy integration with other CLIPLINE complete components. The products are available in versions with a fixed current and an adjustable current, which allows for precise adjustment of their parameters to the load.

Adjustable current circuit breakers

Models:

• PTCB E1 24DC/1-4A NO (2908261)
• PTCB E1 24DC/1-8A NO (2908262)

They allow manual setting of the rated current value. An electronic lock protects against accidental setting changes, and clear LED signaling facilitates real-time diagnostics.

DC circuit breakers

Models:

• PTCB E1 24DC/2A NO (2909903)
• PTCB E1 24DC/3A NO (2909904)
• PTCB E1 24DC/4A NO (2909906)

Designed for installations where loads are constant and known. They are suitable for mass prefabrication, where the repeatability of current paths simplifies the design and reduces the risk of errors.

Versions with SI-R function (Status, Reset, Lock)

Models:

• PTCB E1 24DC/1A SI-R (1135751)
• PTCB E1 24DC/1-4A SI-R (1135753)
• PTCB E1 24DC/1-8A SI-R (1135752)
• PTCB E1 24DC/4A SI-R (1135745)
• PTCB E1 24DC/8A SI-R (1135734)

Equipped with:

• reset input – restoration of operation after tripping,
• status output – error or overload signaling to PLC or HMI,
• electronic setting lock – protection of current settings.

This enables remote monitoring and control of the protection status, which is important in complex industrial automation systems.

Why choose PTCB and CLIPLINE complete?

1. Space saving The extremely narrow design (only 6 mm wide) allows for dense track installation, which is crucial for the prefabrication of small cabinets or control panels.

2. Modularity and scalability The system can be easily expanded with additional protection circuits without having to reorganize the entire DIN rail.

3. Compliance with standards and certifications The products are CE marked, UL certified, and meet industrial standards, which facilitates implementation in international projects.

4. Reduction of downtime Thanks to diagnostic functions such as status outputs and visual error signaling, service personnel can quickly identify the problem and reduce response time.

5. Integration with control systems Signal outputs can be connected to PLCs or operator panels, enabling full integration with plant automation.

Where are they used?

Phoenix Contact products from the PTCB series, mounted in the CLIPLINE complete system, are used in:

• machine power supply and control cabinets,
• HVAC building switchgear,
• transport and logistics systems (e.g., conveyors, elevators),
• process and energy automation,
• redundant power supply and DC-UPS systems.

Their compact form and full compliance with industrial standards make them the ideal choice for prefabricating highly reliable cabinets.

Summary

Prefabricating switchgear using CLIPLINE complete components and PTCB circuit breakers guarantees not only reliability, but also savings in time, space, and costs. The modular approach, configuration flexibility, and full integration with control systems make these solutions well suited to the needs of modern 24 V DC low-voltage installations.

All of the above-mentioned products are available from ELTRON, which has been an authorized distributor of Phoenix Contact in Poland for many years. We provide expert advice, fast stock availability, and full technical support.

Choose proven Phoenix Contact components – available immediately from ELTRON.