Danfoss KPS 77 060L310366 KPS79 Temperature Switch

Product Overview

The KPS79 060L310366 (060L310366) is a heavy-duty KPS 77 series temperature-actuated switch designed for high-reliability control and alarm systems in industrial and marine sectors. Engineered by Danfoss to meet the most stringent safety requirements, this device features a robust armored construction capable of withstanding the vibration and thermal shocks common in engine rooms, power plants, and hydraulic monitoring systems. The 060L310366 operates with a setting range of 50 to 100 deg C, making it an essential component for cooling water systems, lubrication oil circuits, and industrial process heating. Its high-performance contact system ensures a long service life and exceptional repeatability, minimizing the risk of thermal runaway in critical machinery.

Technical Configuration

The KPS 77 platform is distinguished by its high-quality bellows-actuated mechanism and superior electrical contact ratings. This specific unit is optimized for direct mounting with a sensor pocket length of 110 mm, providing deep immersion into the medium for accurate thermal tracking. A key functional advantage of the 060L310366 is its adjustable mechanical differential, which can be tuned between 4 and 16 deg C. This allows engineers to calibrate the hysteresis of the control loop, preventing rapid cycling of pumps or heaters. The sensor is built for extreme conditions, capable of tolerating a maximum bulb temperature of 200 deg C, ensuring the device remains undamaged even during temporary process temperature spikes.

Technical Specifications

Technical FAQs

How do I adjust the mechanical differential on the 060L310366?

The differential is adjusted via the internal differential screw. Increasing the differential prevents "hunting" or frequent switching in systems with rapid temperature fluctuations. For this model, the differential can be set anywhere between 4 and 16 deg C depending on the thermal inertia of your specific application.

Is this switch suitable for marine engine applications?

Yes. The KPS series is specifically designed for marine use and is often accompanied by major shipping approvals (such as GL, LR, DNV). Its robust design resists the low-frequency vibrations typically found on ship engine beds and industrial power skids.

What happens if the medium temperature exceeds 100 deg C?

While the setting range is up to 100 deg C, the sensor can withstand a maximum temperature of 200 deg C. The switch will remain in its activated state above the setpoint but will not suffer mechanical or calibration damage unless the 200 deg C limit is surpassed.

Engineering & Installation Guide

• Sensor Pocket Installation: Always use a thermal conductive paste (heat-sink compound) when inserting the 110 mm sensor into the pocket. This ensures rapid heat transfer and reduces the time constant of the switch, allowing for faster response to temperature deviations. Ensure the pocket is rated for the maximum system pressure of the vessel or pipe.

• Vibration Management: For installations on high-vibration equipment, ensure the electrical cables are flexible and have sufficient slack. Use the integrated mounting holes on the KPS housing to secure the device to a rigid, non-resonant surface to maintain the integrity of the internal SPDT contact alignment.

• Electrical Safety: The KPS series often handles high-load inductive circuits. It is recommended to use a suppressor or RC circuit across the contacts if switching heavy solenoids or motors directly to prevent arcing and extend the life of the silver contact surfaces.