CN102064498B - New line bridging method and special bridging line - Google Patents

Abstract

The invention discloses a new line bridging method and a special bridging line. The special bridging line comprises three bridging units and a special bridge insulating rod, wherein each bridging unit comprises two fixed line clamps which are connected with a line; the bridging line is arranged between the two fixed line clamps; and the special bridge insulating rod is movably connected with the lower ends of the fixed line clamps. The line bridging method and the special bridging line can meet the requirements of bridging of lines of 110KV or less. A device has light weight and high universality, can be conveniently and flexibly operated and is safe to bridge, does not have hidden trouble, and is easy and convenient to transport, assemble and store. Working personnel do not need to work high above the ground. The structure of the bridging device does not have influence on other running equipment and has a broad operating range.

Description

A method of connecting lines

technical field

The invention belongs to the technical field of electric power operation, and relates to a jumper connection method for power transmission and distribution lines up to and including 110KV and a special jumper wire. the

Background technique

In the power operation link, users are often forced to cut off power due to failure or damage of primary equipment such as high-voltage circuit breakers, high-voltage isolation switches, and voltage transformers on the power supply side or load side of power equipment. In this case, due to various factors such as personnel, spare parts, and construction environment, it is often impossible to deal with the faulty equipment in time, or even if someone is sent to deal with it, it is often necessary to cut off the electricity for a long time without emergency measures. In one case, it is urgent to design an emergency circuit jumper that can be operated by operating personnel. the

Contents of the invention

The invention provides a circuit jumper method and a special jumper wire which are simple in procedure, only need a short-term power outage, are safe and reliable, do not need high-altitude operations, and save manpower. the

A kind of new line jumping method, it comprises the steps:

a. Prepare the selected line-specific jumper according to the voltage level and application object;

b. Check that in the substation or two interchanging lines, the phase sequence of the replaced equipment unit and the outgoing line of the replaced equipment is clearly and completely marked;

c. Take measures to cut off the power of the two alternate lines;

d. Check the phase sequence signs between the superseded line and the intersected line, which correspond to the superseded line respectively. The cross-line installation of the phase line is carried out in the order of B phase, A phase, and C phase;

e. The two ends of each phase grounding jumper of phase B, phase A and phase C shall be fixed firmly with threaded screws. the

f. Check that the phase sequence plate and phase color paint of the two alternate lines are consistent with the line jumper. the

g. Remove the safety measures on both sides of the lines on both sides of the replacement line, and transmit power to the line to be replaced. If the line to be replaced is equipped with high-frequency or optical fiber differential protectors, the longitudinal differential protection will be withdrawn before power transmission. the

A special jumper wire for realizing the above-mentioned new line jumper method, which includes three jumper units, each of which includes two fixed line clamps connected to the line, and a jumper line is arranged between the two fixed line clamps, so The special jumper wire also includes a special jumper insulating rod, and the special jumper insulating rod is movably connected to the lower end of the fixed line clamp. the

The line connecting method and the special-purpose jumper wires of the present invention can satisfy the operation of connecting lines of 110KV and below. The device is light in weight, convenient and flexible in operation, strong in versatility, safe in bridging, free of hidden dangers, and convenient in transportation, assembly and storage. Staff do not need to work at heights. The structure of the jumper device will not affect other operating equipment and the scope of operation. Due to the special design and treatment of increasing the contact area across the edge of the wire clamp, the current carrying capacity and mechanical tensile strength of the jumper wire can be effectively improved. The three-phase jumper wire is wrapped with insulating materials and coated with phase-colored paint The difference is that the sag is properly controlled across the three-phase lead wires, and electric shock accidents will not be caused by the radian of the line. Before and after the jumper line, the jumper work can be completed without climbing up. It is especially suitable for faults or abnormalities that cannot be dealt with in a short time due to faults of isolating switches, circuit breakers, and CTs in the station. It can not only realize cross-connection construction without climbing a height, but also reduce the labor intensity of crossing, and provide users with short-term emergency power supply, greatly improving Shorten the spanning operation time, improve the reliability of power supply, and win time for power users to produce self-rescue and accident handling after power failure. the

Description of drawings:

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a schematic diagram of the special cross-connection method of the present invention;

Fig. 2 is a schematic diagram of the structure of the special jumper wire of the present invention. the

Detailed ways

As shown in Figure 1, a kind of line spanning method, it comprises the following steps:

a. Select the crossing line and prepare the corresponding line crossing tool;

b. Take measures to electrify both the substituting line and the substituting line;

c. After checking that the phase color marks of the two lines are correct, do not select the cross-connection line of the corresponding color, install phase A, phase B, and phase C one by one, and connect the insulation rod to the cross-connection line. When installing, the opening of the clamp is facing downward. Tighten the straddle clips. the

d. Check that the phase sequence on both sides of the installed cross-connection is correct, there is no residue, and the connection of the cross-connection clip is fastened without looseness. 

The distance between A, B and C is kept at 80 cm and there is no possibility of mutual collision;

e. Remove the safety measures of the two lines of A and B, and restore the power transmission of the line. the

A special jumper wire for realizing the above-mentioned new line jumper method, which includes three jumper units, each of which includes two fixed line clamps 1 connected to the line, and a jumper line is set between the two fixed line clamps 1 3. The special jumper wire also includes a special jumper insulating rod 2 , and the special jumper insulating rod 2 is movably connected to the lower end of the fixed line clamp 1 . the

The use of line jumpers can meet various environmental operations of 110K and below. The jumper has a simple structure, light weight, convenient and flexible operation, strong versatility, safe crossing, no hidden dangers, and simple and convenient transportation, installation and assembly. Operators can operate without the cooperation of maintenance and construction personnel, and save a lot of time without the need for high-altitude operations. It can reduce power failure losses caused by equipment damage for users, improve emergency handling capabilities, and provide emergency response for single power users. Accident security power supply. Due to the design of the large contact surface of the silkworm chrysalis aluminum material of the jumper clamp, its current passing performance is good, the weight is light, and the mechanical strength is high after the clamp is pressed. The cross-connection wire adopts the steel-cored aluminum stranded wire with phase-color paint wrapped in the outer insulating sheath, and the connection wire is considered, and the sag control is reasonable, which ensures the safety of the power supply after the mutual connection. The cross-connection of the line can complete the crossing work without climbing a height. It can not only reduce the labor intensity of crossing, greatly shorten the time of crossing operation, greatly improve the safety factor and efficiency of crossing construction, reduce the rush of personnel, improve the emergency response capacity, and enrich the emergency response means. the

Claims (1)

1. a bridging line method, is characterized in that: it comprises the steps:

A. by special the circuit choosing jumper according to electric pressure, application, prepares stand-by;

B. check in transformer station or two indicated complete display with institute for pipeline equipment outlet phase sequence for unit for circuit mutually;

C. by two mutually for circuit, do have a power failure, grounding measures;

D. check by for circuit with mutually for phase sequence mark between line phase-sequence detection, install respectively for the corresponding phase circuit of circuit cross-line and carry out according to B phase, A phase, C phase sequence with institute respectively;

E. B phase, A phase, C often join cross-line two ends, ground screw thread mutually by wire clamp fixation;

F. check two consistent with circuit wiring phase-sequence plate and phase colored paint for circuit mutually;

G. will remove for both sides' circuit both sides safety measure mutually, institute, for circuit power transmission, if institute is equipped with the Protector such as high frequency or optical differential for circuit, before power transmission will be exited longitudinal difference protection.