Electrical plug connections for central lubrication systems
Electrical plug connections such as cable sockets or connecting plugs play an important role in central lubrication systems. The electrotechnical components are used for communication between the various system components and are mainly responsible for monitoring proper function. Cable sockets are used in both single-line and progressive lubrication systems.
In addition to the main components - pump, metering device and lubricant line - central lubrication systems are usually equipped with a whole range of additional components in the periphery of the system. These components include pressure switches, level switches, flow sensors, directional control valves and filters.
With the help of these monitoring and measuring devices, important thermodynamic measurands such as the pressure or the volume flow of the lubricant can be measured and converted into electrical switching signals. Pressure switches generate a switching signal, for example, from a certain pressure specified by the user. This is taken up by a cable socket and can then be used, for example, to electrically control the single-line or progressive pump.
In addition, the larger electrical consumers of the system, such as the single-line and progressive pumps, must be connected to the electrical network. Depending on the pump output, either a power cable for conventional 230 volt alternating current or for industrial three-phase alternating current is used. For most applications, a normal connection cable for 230 volt household electricity is sufficient. However, the design of the pump motor is decisive.
Technical basics for cable sockets and power cables
SKF manufactures cable sockets in different versions depending on the intended use. The electrical plug connections are standardized and, depending on the design, are suitable for various components in central lubrication systems. The design according to the standard DIN EN 175301-803 can be used for pressure switches, flow sensors, filter monitors, level switches and flow monitors, for example. The cable socket can be operated with a maximum operating current of 10 A and, depending on the type, works with 230 V AC or 24 V DC.
The 4-pin M12x1 cable socket can also be used for piston detectors, streak sensors and cycle switches. Depending on the geometric conditions, the SKF model is available in both a straight and an angled version. The maximum operating current for this variant is 4 A.
The technical data sheets must also be taken into account for the power cables for the pumps in the central lubrication system. In addition to the type of voltage, the conductor cross-section of the connection cable is also decisive.
Advantages of electrical plug connections in central lubrication systems
Central lubrication systems such as single-line or progressive systems are characterized by very precise metering and allocation of the lubricant. In order for this dosing to work properly, continuous monitoring of the system using pressure switches, level switches, flow sensors or directional valves is essential. In this context, cable sockets take on the important task of tapping the electrical signal for controlling the hydraulic units and forwarding them cleanly. This ensures that deviations from the target state can be corrected immediately.