27.25.8.230.4000 Finder Step relay Clamp terminal

Why Choose the Finder 27.25.8.230.4000 Electromechanical Step Relay?

The Finder 27.25.8.230.4000 is an electromechanical step relay from the Finder 27 Series, designed for impulse-operated switching in residential, commercial and building electrical installations. Featuring a 230 V AC operating coil, this relay provides a practical solution for controlling lighting and other compatible electrical circuits using momentary push-button signals.

Unlike conventional electromagnetic relays that require continuous coil energisation to maintain their operated state, the Finder 27.25.8.230.4000 uses a mechanically maintained stepping mechanism. Each suitable electrical impulse advances the relay through its defined switching sequence, allowing the selected contact state to remain in position after the control impulse ends.

The Finder 27.25 type belongs to the manufacturer's impulse relay family, offering a practical switching solution for installations requiring sequential electrical control. Its electromechanical operating principle makes it particularly useful for lighting circuits controlled from multiple locations, helping simplify control arrangements while providing dependable operation.

Key Advantages

• 230 V AC operating coil for compatible mains-voltage control circuits.
• Impulse-operated switching enables control through momentary push-button signals.
• Mechanically maintained contact position eliminates the need for continuous coil energisation between switching operations.
• Sequential switching capability supports electrical control arrangements requiring defined contact-state changes.
• Multiple control-point operation allows suitably wired push buttons to control a common electrical circuit.
• Electromechanical construction provides a straightforward method of electrical load control.
• Reduced continuous coil consumption because the coil is energised only during operating impulses.
• Versatile installation applications include lighting control, building services and electrical automation.
• Finder 27 Series design supports identification and replacement in compatible existing installations.

Key Features

• Finder 27 Series electromechanical step relay.
• Type 27.25 impulse-operated relay.
• 230 V AC rated operating coil.
• Electromagnetic stepping mechanism.
• Mechanically maintained switching positions.
• Momentary electrical impulse control.
• Sequential contact switching according to the relay's defined operating sequence.
• Suitable for appropriately designed multi-point push-button circuits.
• Designed for lighting and building electrical control applications.
• Does not require continuous coil energisation to maintain its selected contact position.
• Manufacturer-specific identification for electrical maintenance and replacement.

Selection guidance: The exact contact configuration, switching sequence, rated contact current, installation dimensions and terminal arrangement should be confirmed against Finder's official documentation for part number 27.25.8.230.4000 before installation or replacement.

Sequential Impulse Switching for Lighting and Building Automation

Electromechanical step relays provide a convenient method of controlling electrical loads using momentary control signals. The Finder 27.25.8.230.4000 incorporates a 230 V AC operating coil that activates a stepping mechanism whenever a suitable electrical impulse is applied.

Each impulse advances the relay through its specified switching sequence. Once the impulse has ended, the mechanical mechanism retains the selected position without requiring a continuously energised coil. This operating principle is useful in electrical installations where switching commands are issued intermittently from push buttons or other compatible control devices.

In lighting control applications, multiple momentary push buttons can be arranged to operate a common step relay. This allows lighting circuits to be controlled from different locations without requiring conventional maintained switches at every control point.

The 27.25 type designation identifies a specific switching arrangement within the Finder 27 Series. The actual contact sequence should be checked against the manufacturer's wiring diagram, particularly when the relay is intended to control more than one lighting circuit or perform sequential switching functions.

For applications involving LED lighting, fluorescent fittings or other equipment with significant inrush currents, the connected load must be checked against the manufacturer's specified contact ratings. The relay should be installed with suitable circuit protection and wiring arrangements in accordance with applicable electrical standards.

Typical Applications

• Residential lighting control installations.
• Commercial building lighting systems.
• Multi-point push-button lighting control.
• Corridor and stairwell lighting circuits.
• Sequential electrical switching applications.
• Building automation and electrical control systems.
• Impulse-operated electrical installations.
• Centralised lighting control arrangements.
• Electrical installation upgrades and refurbishment.
• Replacement of compatible Finder 27 Series step relays.