system

Abstract

A system (100) comprising a distribution unit (1) having an input terminal (2) to which an AC voltage network (3) that provides a maximum power can be connected as intended, and at least two output terminals (4, 5), and a construction machine (6) having an input terminal (7) that is intended to be connected to an output terminal (4) of the at least two output terminals (4, 5) of the distribution unit (1), wherein the distribution unit (1) is designed to transmit to the construction machine (6) data indicative of the power currently being output at said output terminal (4) of the at least two output terminals (4, 5) of the distribution unit (1), or at least one other output terminal (5), and the construction machine (6) is designed to limit the power consumed by the construction machine at its input terminal (7) to a single value such that the sum of the powers output at the at least two output terminals (4, 5) of the distribution unit (1) does not exceed the maximum power of the AC voltage network (3).

Description

Summary of the Invention

[0001] The invention is based on the problem of providing an electrical supply system which makes the best possible use of the electrical connection power available on a construction site.

[0002] The system has an intelligent electrical distribution unit.

[0003] The distribution unit has input terminals to which a single-phase or polyphase AC voltage network can be connected as desired, which AC voltage network provides maximum power.

[0004] The distribution unit further has at least two output terminals.

[0005] The system further includes a partially or fully motorized construction machine.

[0006] The construction machine, as intended, has an input terminal that is electrically connected to one of the output terminals of the distribution unit.

[0007] The distribution unit is designed to transmit data to the construction machine indicative of the power currently being output at one or more other output terminals of the distribution unit. To detect the power currently being output at one or more other output terminals of the distribution unit, the distribution unit has appropriate hardware, such as a current sensor, for example. Data can be transmitted between the construction machine and the distribution unit in a wired and / or wireless manner.

[0008] The construction machine is designed to limit the power consumption of the construction machine at its input terminals to a value that ensures that the total power output at the output terminals of the distribution unit does not exceed the maximum power of the AC voltage network. This ensures that the maximum power of the AC voltage network is not exceeded, and therefore overloading of the AC voltage network can be reliably avoided. Furthermore, the available electrical connection power is optimally used.

[0009] In one embodiment, the construction machine is designed to select its power consumption at its input terminals such that the sum of the powers output at the output terminals of the distribution unit exactly corresponds to the maximum power of the AC voltage network, only if the power requirements of the construction machine result in a power demand that is greater than or equal to the maximum power of the AC voltage network.

[0010] In one embodiment, the construction machine is a dense solids pump.

[0011] In one embodiment, the construction machine comprises an electrically driven hydraulic pump, for example used to drive a cylinder for transporting particularly dense solids.

[0012] In one embodiment, the maximum power is 75 kW.

[0013] In one embodiment, the system includes another construction machine that is or is to be connected as intended to one or more other of the at least two output terminals of the distribution unit, such as a construction crane.

[0014] Electric concrete pumps currently require a maximum terminal current of 125 A or a corresponding connection power for electric pumping, since the electric drive of the concrete pump is designed for this power. Therefore, the construction machine or concrete pump is provided with connectors or terminals that are geometrically and electrically dimensioned for this connection power.

[0015] On construction sites with a 125A power supply, there is usually only a single 125A terminal. If there is a construction crane on the construction site, it is often connected to the single 125A terminal. In that case, it is no longer possible to connect construction machinery or concrete pumps to the 125A terminal.

[0016] According to the present invention, there is provided a distribution box or distribution unit providing at least two 125 A terminals or outlets, one terminal for, for example, a construction crane and another terminal for a construction machine. The distribution unit is provided with, for example, a current measuring device for measuring the current currently consumed by the construction crane. This measured current value is transmitted to the construction machine or its control device, which then reduces the power consumption of the construction machine so as not to exceed the 125 A current limit.

[0017] The present invention will now be described with reference to the drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic view of a construction site with a construction crane and a system according to the invention with a distribution unit and a construction machine; DETAILED DESCRIPTION OF THE INVENTION

[0019] FIG. 1 shows diagrammatically a construction site equipped with a construction crane 8 and a system according to the invention having a distribution unit 1 and construction equipment in the form of a concrete pump 6 .

[0020] The construction machine 6 has an electrically driven hydraulic pump 11 that is used to power a hydraulic load, for example in the form of a hydraulic drive cylinder.

[0021] The distribution unit 1 has an input terminal 2 to which an AC voltage network 3 can be connected as intended, provided for example by a construction current distributor 9 having a single 125 A terminal. The AC voltage network 3 provides a maximum power of 75 kW, which here corresponds to the exemplary 125 A.

[0022] The distribution unit 1 has two output terminals 4 and 5 .

[0023] The construction machine 6 has an input terminal 7 of 125A which is connected to one of the output terminals 4 or 5 of the distribution unit 1, as intended. In this case, the construction machine 6 or its input terminal 7 of 125A is connected to output terminal 4 of the distribution unit 1, and the construction crane 8 is connected to output terminal 5 of the distribution unit 1.

[0024] The distribution unit 1 is designed to transmit data at another output terminal 5 of the distribution unit 1 to the construction machine 6 indicating the power or corresponding current currently being output to the construction crane 8. In this case, as an example, 25 A is output at the construction crane terminal 5.

[0025] Data can be transmitted wirelessly and / or by wire between the distribution unit 1 and the construction machine 6. In this case, the data is transmitted via a dedicated data line 10, for example.

[0026] The construction machine 6 is designed to limit the power consumption at the input terminal 7 of the construction machine 6 to a single value so that the sum of the power output at the two output terminals 4 and 5 of the distribution unit 1 does not exceed the maximum power of the AC voltage network 3.

[0027] In this case, the construction machine 6 limits its power consumption, or corresponding current consumption, to 100 A, so that a total of exactly 125 A or 75 kW is drawn from the AC voltage network 3 .

[0028] Therefore, according to the invention, the AC voltage network 3 is always used with its maximum connected power when necessary, and even if the construction current distributor 9 only provides a single 125 A terminal, two 125 A terminals are provided by the distribution unit 1.

[0029] It is understood that the distribution unit 1 may also have more than two output terminals.

Claims

1. an input terminal (2) to which an AC voltage network (3) providing maximum power can be connected as intended; At least two output terminals (4, 5); a distribution unit (1) having an input terminal (7) that is intended to be connected to one of the at least two output terminals (4, 5) of the distribution unit (1); A construction machine (6) having A system (100) comprising: the distribution unit (1) is designed to transmit data indicating power currently being output at one or more other output terminals (5) of the at least two output terminal sections (4, 5) of the distribution unit (1) to the construction machine (6); the construction machine (6) is designed to limit the power consumption of the construction machine at its input terminals (7) to a value such that the sum of the power output at the at least two output terminals (4, 5) of the distribution unit (1) does not exceed the maximum power of the AC voltage network (3).

2. 2. The system (100) according to claim 1, characterized in that, when the power requirement of the construction machine (6) is equal to or greater than the maximum power of the alternating current voltage network (3), the construction machine (6) is designed to select its power consumption at its input terminals (7) so that the sum of the powers output at the at least two output terminals (4, 5) of the distribution unit (1) exactly corresponds to the maximum power of the alternating current voltage network (3).

3. The system (100) according to any one of claims 1 to 2, characterized in that the construction machine (6) is a high density solids pump.

4. A system (100) according to any one of claims 1 to 3, characterized in that the construction machine (6) has an electrically driven hydraulic pump (11).

5. The system (100) according to any one of claims 1 to 4, characterized in that the maximum power is 75 kW.

6. The system (100) according to any one of claims 1 to 5, further comprising another construction machine (8) that is intended to be connected to the one or more other output terminals (5) of the at least two output terminals (4, 5) of the distribution unit (1).

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