Terminology

The grab – (German – Greifer, from greifen – to grab) – a lifting device, designed to equip lifting and transport mechanisms (lifting cranes, loaders, excavators, etc.), and has rotary tines for load engagement. The grab is used for handling bulk and lump trucks, pipes, timber at short distances.

The crane starting throttle (inductor starting device, a current-limiting reactor) – active-inductive resistance introduced into the rotor chain of the electric motor with a phase rotor. It is designed to limit starting currents. The process of restricting the start current is due to the following processes: during the start, the frequency of the electric current passing by the rotor is 50 Hz, the inductive resistance of the throttle at this moment is at max. During the output of the electric motor to the nominal speed of rotation, the frequency of the electric current in the rotor tends to zero, which at one time leads to a significant decrease in the inductive resistance of the throttle. The active resistance of the throttle is exactly ohmic resistance of the wires that the throttle coil is wound.

The thyristor velocity regulator is a device that provides both smooth and stepped change in the rotational speed of the electric motor with a phase rotor. It is used in conjunction with the DDP starting throttle of OOO “KEP “DimAl”.

The throttle adjustable electric drive consists of a starting throttle and a speed controller.

The dividing transformer is a device designed to separate the network that supplies the power consumer from the voltage source, as well as from the grounding network. The transformer can be dividing under the condition that none of its secondary windings is grounded.

The emergency power supply allows to ensure the necessary safety of work, preventing emergency release of load when the supply voltage is disappeared.

The lifting electromagnet – a loading device used as attached equipment for various types of cranes (gantry, bridge cranes) and loaders intended for performing loading and unloading work. The overall sign of electromagnets is the transfer of ferromagnetic loads with a powerful electromagnetic field.

The breakaway force is a calculated value confirmed by experimental data – the force that needs to be applied to the electromagnet for separating it from ferromagnetic material. It is determined on a clean plate with a roughness of the corresponding the 1 class (GOST 2789-59) made of low-carbon steel (ST2), a thickness of at least 200mm, the size of at least the size of the operating surface of the electromagnet and permissible nonflatness of 3mm / m. Tests are carried out on the electromagnation with the installed thermal regime.

The load capacity of the electromagnet is the maximum weight of the load that is allowed to raise and move with the electromagnet.

The current of the magnet – the current passing through the electromagnet coil at rated voltage and the temperature of the coil at 20ºС.

The magnet power – is the power consumed by electromagnet in the steady heat mode.

The category of lifting capacity – a conditional scale that allows within a single size (diameter) to group electromagnets with various technical specifications.

The CY duty factor % is the relative duration of inclusion – the percentage of the total continuity of inclusion in a period of time to the duration of this period.

The duration of the work cycle is the total time (turned on, off), from the moment when the electromagnet is ready for the lifting of a load, until the next load is ready to be handled.

The combined coil is a copper-aluminum coil – this design of the coil allows to optimally distribute the heat released by the current passing through the coil.

The lifting beam – a lifting device designed to handle long metal rolling. A lifting beam can be equipped with sling hooks and lifting electromagnets (lifting electromagnetic beams).