CN2648655Y

CN2648655Y - Construction site special distribution box

Info

Publication number: CN2648655Y
Application number: CN 200320110323
Authority: CN
Inventors: 李红军
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-22
Filing date: 2003-10-22
Publication date: 2004-10-13
Anticipated expiration: 2013-10-22

Abstract

The utility model discloses a special distribution box for building construction sites. The distribution box is composed of a box body, a wiring and mounting plate, a wire inlet seat, a wire outlet seThe utility model discloses a special distribution box for construction site. The distribution box that comprises a box body, a layout and installation plate, a lead-in line seat, an outgoing line seaat, a leakage protector, etc. In the distribution box, an earthing and wiring seat of a shared base plate which is provided with more than two wiring terminals causes each protecting zero line to be et, a leakage protector, etc, adopts a co-substrate that has more than two terminals to connect a nursery grafting line seat so as to earth each protective zero line and a screw fuse is arranged on eacarthed, and each inputted phase line on the wire inlet seat is respectively provided with a spiral fuse. The utility model avoids that the work zero line and the protecting zero line of the existing sh phase line input by the lead-in line seat so as to avoid the operating danger caused by the share use of working zero line and protective zero line in the current similar equipment. The layout in thimilar device are easily shared, which brings dangerous operation. The utility model has clear wiring in the box body, and the maintenance and the inspection are convenient. e box is clear and convenient to maintain and check.

Description

The special-purpose distribution box of construction site

The utility model belongs to electric equipment, especially the electric appliance circuits manufacturing field of equipment.

380/220V three phase and four wire circuit system used distribution box in construction site does not supply the shared ground connection junction block of multiple devices ground connection owing to be provided with separately at present, and following misoperation often appears in the more weak operator of some labor safeties consciousness:

1. the zero connection protection line with the metal shell of construction equipment directly joins with the power supply neutral line (N), such result, and in the electric loading imbalance, when producing zero-sequence current, earth connection produces voltage to earth, and electric shock accidents takes place.

2. the earth connection of multiple devices is connected on a certain on the earthing of casing screw of grounding apparatus.Such result makes the end of a thread twine in a jumble, and operator and security staff can not clearly distinguish wire connection state.A plurality of the end of a thread also are difficult for stable on a ground connection screw, easily cause virtual connection, misconnection phenomenon.

In addition; existing distribution box earth leakage protective device is after carrying out the earth leakage protective action; it separates and closure state can only be judged by the position of switch handle; because the difference at visual angle; the position is held inaccurate; easily cause the danger of electric shock to the attendant, the maintainer can't simply judge cut-offfing of each phase, brings inconvenience to line maintenance.

Above shortcoming in view of prior art, the purpose of this utility model is a kind of special-purpose distribution box in job site with independent grounding junction block of design, and make it to have the distinct advantage of line alignment, can make operator and security staff when checking circuit, understand line security at a glance.

The purpose of this utility model is to realize by following design.

The special-purpose distribution box of construction site; form by casing, wiring mounting panel, inlet wire seat, outlet seat, earth leakage protective device etc.; cobasis plate earthing junction block connection with two above binding posts is ground wire grounded, all is equipped with screw type fuse on each phase line of inlet wire seat input.

After having adopted design as above, on terminal block, be provided with separately and ground connection junction block that the neutral line of powering is separated, form so-called Three-phase five-wire (U, V, W triple line, neutral N line, the ground protection line PE) mode of connection.The common metal substrate ground connection junction block with two above binding posts that is provided with is screwed in the protection connecting to neutral line of each equipment respectively on each binding post separately, and ground connection is firm, contact resistance is little, no virtual connection phenomenon; Because every protective wire that needs ground connection is (as the protection connecting to neutral line of introducing; the protection connecting to neutral line that links to each other with the equipment metal shell; the iterative earthings of equipment etc.) all sit in the right seat on junction block, wrong line or few wiring a glance just can find out that easy operating person and security staff differentiate line conditions.After inserting screw type fuse, when earth leakage protective device was carried out the earth leakage protective operational motion, the molten cap that the maintainer is revolved plug fuse is open-circuit line significantly just, had avoided causing the possibility of electric shock.

Description of drawings is as follows.

Fig. 1 is the electric hookup of distribution box embodiment of the present utility model.

Fig. 2 is the enforcement illustration of the cobasis plate earthing junction block of the utility model distribution box.

In Fig. 1,1 is the inlet wire junction block of distribution box, connects U, V, three phase lines of W and neutral line N on it, and 2 is cobasis plate earthing junction block, and RCD1, RCD2, RCD3 are the 380V earth leakage protective device, and 3,4,5 are respectively apparatus socket; RCD4 is the 220V earth leakage protective device, and 6 is the 220V apparatus socket.Be provided with

screw type fuse

7,8,9 on U, V, the W triple line respectively.Fig. 2 is the example structure figure of cobasis plate earthing junction block 2, can find out among the figure, has the earth connection that each binding post of two above binding posts (this example is 3) will connect particular device respectively on the metal substrate 10 and is connected on the common ground connection wiring substrate 10.Junction block 2 is installed and (generally being welding) is set on mounting panel.

Claims

1, the special-purpose distribution box of a kind of construction site is made up of casing, wiring mounting panel, inlet wire seat, outlet seat, earth leakage protective device etc., it is characterized in that,

A) the cobasis plate earthing junction block (2) with two above binding posts connects ground wire grounded;

B) on each phase line of inlet wire seat input, all be equipped with screw type fuse (7,8,9).

2, the special-purpose distribution box of construction site according to claim 1 is characterized in that described cobasis plate earthing junction block is arranged on the mounting panel.