General
Terminal type	three-tier terminal
Connection type	protective earth/through/through terminal PE/L/L
Colour housing	Grey
Application range	Ex e II suitable
Connection cross section	0,25-2,5(4) mm²

The WAGO three-pole terminal block type 2002-3257 is an industrial connection terminal for use in electrical control systems. It enables secure and reliable connection of three conductors, with the PE/L/L arrangement allowing a combination of protective earth conductor and two through conductors. The terminal block is specifically designed for applications in the Ex e II category, making it suitable for use in explosive atmospheres. The housing is gray in color and features an integrated labeling carrier, enabling clear identification of the connections.

Applications

The terminal block is intended for use in industrial electrical installations, particularly in environments meeting the requirements of the Ex e II category. This includes, for example, installations in the chemical industry, petrochemical sector, or process engineering, where increased explosion protection is required. The design allows for secure connection of conductors with cross-sections from 0.25 to 2.5 mm², with an extension up to 4 mm² possible. The terminal block is designed for use in enclosures and distributions, where clear and traceable labeling of connections is necessary.

Functions and Equipment in Detail

The three-pole terminal block features three connection points, each designed for one conductor. The PE/L/L arrangement enables simultaneous connection of a protective earth conductor (PE) and two through conductors (L), which is useful in complex circuits. The integrated labeling carrier allows direct identification of individual connections, simplifying maintenance and servicing. The terminal block is designed for use in enclosures and can be mounted on standard support rails.

Technology Explained Simply

The terminal block operates on the principle of a screw terminal, where conductors are secured by a screw connection. The construction ensures a secure electrical connection, even under vibration or temperature fluctuations. The use of materials meeting the requirements of the Ex e II category ensures enhanced safety in explosive environments. The labeling function supports compliance with safety and documentation regulations.

Compatibility and Accessories

The terminal block is compatible with various accessories that extend its functionality. These include, for example, quick labeling systems such as Mini-WSB, insulation stop elements, test adapters, and comb bridges. These components allow flexible adaptation to specific requirements, such as insulating connections or connecting multiple conductors. The terminal block can be mounted on standard support rails such as copper support rail 210-198 or steel support rail 210-508.

The terminal block is designed for use in enclosures and distributions, where clear and traceable labeling of connections is necessary.

Mounting and Installation

Mounting is done on standard support rails commonly used in enclosures. The terminal block is secured using an actuation tool, such as tool 210-720. The connection of conductors is made via screw connection, taking into account the specified cross-sections of 0.25 to 2.5 mm² (extendable up to 4 mm²). Labeling is done via the integrated carrier, with additional labeling systems such as Mini-WSB or WMB systems optionally usable.

Advantages in Operation

The terminal block provides a secure and reliable connection that remains stable even under difficult operating conditions. The integrated labeling function reduces errors during maintenance and servicing. Compatibility with various accessories allows flexible adaptation to specific requirements. Suitability for Ex e II applications extends the range of use in safety-critical environments.