Finder 27.24.8.230.4000 – 27 Series Step Relays

Why Choose the Finder 27.24.8.230.4000 Step Relay?

The Finder 27.24.8.230.4000 is a modular electromechanical step relay from the Finder 27 Series, designed for impulse-operated switching in lighting control and building electrical installations. Featuring a 230 V AC operating coil, this relay provides a practical solution for controlling electrical circuits using momentary push-button signals.

Unlike a conventional contactor that requires a continuously energised coil to maintain its switched position, a step relay changes its contact state in response to an operating impulse. This makes the Finder 27.24.8.230.4000 suitable for lighting systems where a load must be switched from one or more push-button control points.

The 27.24 designation identifies a four-contact step-relay variant within Finder's 27 Series. Its impulse-operated switching principle makes it useful in building automation and electrical installations requiring convenient manual control without maintaining a continuous coil supply.

Key Advantages

• Impulse-operated switching enables electrical loads to be controlled using momentary push buttons.
• 230 V AC operating coil supports compatible mains-voltage control circuits.
• Four-contact relay design provides a multi-contact switching arrangement.
• Step-relay operation maintains the selected switching state between control impulses.
• No continuous coil energisation is required to maintain the relay's selected position.
• Multiple control-point capability supports lighting circuits operated from several push-button locations.
• Electromechanical construction provides a straightforward switching method for building installations.
• Finder 27 Series compatibility supports identification and replacement within suitable existing installations.
• Versatile control applications include lighting circuits, building services and impulse-operated electrical systems.

Key Features

• Finder 27 Series electromechanical step relay.
• Type 27.24 impulse relay.
• 230 V AC rated coil voltage.
• Four-contact switching arrangement.
• Electromagnetic impulse-operated mechanism.
• Maintains its switching position after the operating impulse ends.
• Suitable for momentary push-button control circuits.
• Supports multi-point switching arrangements in appropriately designed installations.
• Designed for electrical lighting and building control applications.
• Manufacturer part number 27.24.8.230.4000 for accurate product identification.

Selection guidance: Confirm the precise contact sequence, contact current rating, terminal arrangement and permissible control-impulse duration against Finder's official technical documentation for 27.24.8.230.4000 before specifying the relay for a particular load.

Impulse Switching for Lighting Control and Building Automation

Step relays provide an effective alternative to conventional maintained switches in electrical installations where a circuit needs to be controlled from several locations. The Finder 27.24.8.230.4000 uses a 230 V AC operating coil to activate an electromechanical stepping mechanism when a suitable control impulse is applied.

Each operating impulse advances the relay mechanism according to its defined contact sequence. The selected contact position is mechanically maintained when the impulse ends, allowing the relay to control compatible loads without requiring continuous coil energisation.

This operating principle is particularly useful for lighting systems controlled by multiple momentary push buttons. Instead of using conventional multi-way switching arrangements, suitable push buttons can be connected to a common impulse-control circuit, with the step relay performing the load-switching function.

The four-contact configuration of the Finder 27.24 type provides additional switching possibilities compared with simpler single-contact step relays. The exact sequence and relationship between the contacts must be checked against the manufacturer's circuit diagram to ensure that the selected relay matches the intended control arrangement.

For LED lighting, fluorescent lighting and other loads with significant inrush currents, the relay must be selected according to the manufacturer's applicable load ratings. Control wiring, protective devices and installation conditions should also comply with relevant electrical standards.

Typical Applications

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