CN103269035A

CN103269035A - Phase checking auxiliary device in process of cable installation

Info

Publication number: CN103269035A
Application number: CN2013101509601A
Authority: CN
Inventors: 刘畅; 齐昕; 都志军; 刘荣浩; 沈宾; 刘丽瑶
Original assignee: State Grid Corp of China SGCC; Tianjin Electric Power Corp
Current assignee: State Grid Corp of China SGCC; Tianjin Electric Power Corp
Priority date: 2013-04-27
Filing date: 2013-04-27
Publication date: 2013-08-28
Anticipated expiration: 2033-04-27
Also published as: CN103269035B

Abstract

The invention relates to a phase checking auxiliary device in the process of cable installation. A panel and a machine board are arranged on the auxiliary device. A power switch, a loudspeaker, an own control board, an opponent control board and a phase checking state rotary knob set are arranged on the panel. A power carrier machine and a power supply are installed on the machine board. The auxiliary device is sleeved with a cable to be detected through a high-frequency cable and a clamping type inductive coupler. According to the phase checking auxiliary device in the process of the cable installation, a shielding layer of the cable to be detected is used as a communication medium, loading signals of the power carrier machine are used for communication, the problem of mutual communication in the phase checking process of a traditional cable is solved, the purpose that workers at two ends of the cable can directly conduct communication without conveying of an intermediate link at any external condition is achieved, the workers at the two ends of the cable can see current and immediate working states of the workers at the opposite end, the working states are represented by acousto-optic signals, effective prompting is achieved, and mistakes are prevented from being made.

Description

Nuclear phase servicing unit when a kind of cable is installed

Technical field

The invention belongs to the power construction technical field, check phase sequence, nuclear phase servicing unit when especially a kind of cable is installed when relating to power cable and installing.

Background technology

Electric power system is three-phase AC electrical supply system, and a fixing phase difference is arranged between its three-phase when normally moving, and three-phase current has fixing sequencing, and the people is for after providing phase sequence, and being electrically connected of all devices all must be according to this order.The effect of cable line in electric power system is that the electric equipment with certain part two ends in the system couples together, this just requires the phase place of the terminal device that cable line whenever is connected identical, for example the electric equipment at A phase cable connection two ends also must be the A phase, if A phase cable near-end connects the A phase, what far-end connected is B phase equipment, is setup error.If threephase cable phase sequence setup error, can cause its corresponding low-pressure side phase sequence of when operation energising mistake too, might cause the motor counter-rotating when causing low pressure side joint threephase motor, also can cause when this part equipment and other charging equipments side by side or during cyclization, produce very big electric current, huge electric current can cause electric equipment to damage, even blast causes personal injury.It is very important checking phase sequence when therefore, cable is installed.

The resistance to earth method is the most traditional nuclear-phase method, and operating procedure is: 1, cable near-end personnel prepare to survey A resistance relatively with megger, inform the far-end staff with mobile phone or intercom; 2, the far-end personnel inform that the near-end personnel can begin operation, and personnel are away from cable end with a certain phase cable grounding; 3, the near-end personnel test A resistance relatively with megger: if resistance to earth is 0, determine that then the cable of opposite end ground connection is the A phase, at this moment stop test, and inform that the opposite end has stopped test, the opposite end phase sequence is correct, the far-end personnel make marks A phase cable; If resistance to earth is very big, not the A phase then, and inform that the opposite end has stopped test, opposite end phase sequence mistake that the far-end personnel are earlier this discharge of phase cable, wireline test of gravity treatment again.

Whole wireline test process need cable two ends staff links up at any time, and communication mode is mainly mobile phone or intercom, and the other side informed in staff's language.Yet along with the development of modern city, high building stands in great numbers, and cable machinery mainly all is placed in the basement of skyscraper at present, when airtight basement is installed, does not have wireless communication signals usually, and mobile phone can't use.The a plurality of intercoms of general use are as intermediate link now, and middle a plurality of staff pass on step by step, could realize that the staff at cable two ends communicates by letter mutually.The defective of doing like this is: 1, passing on step by step occurs mistake easily, if intermediate link has a staff to understand unclear or expresses unclearly, error understanding or pass on can cause the mistake in the work, even bring danger can for other staff.2, pass on step by step and reduce operating efficiency greatly, lengthen working hours.3, the labor cost of finishing a job can increase, especially long apart from the time because the intercom speech range is limited, more to increase manpower.

Summary of the invention

The objective of the invention is to overcome the weak point of original technology, nuclear phase servicing unit when providing a kind of cable to install, check phase sequence work in the time of can realizing cable installed and play effective help, help staff's efficient communication at cable two ends, confirm the other side's operating state with the way of acousto-optic hint mutually.

The technical scheme that technical solution problem of the present invention adopts is:

Nuclear phase servicing unit when a kind of cable is installed, panel, machine plate are set on the described servicing unit, panel is provided with mains switch, loud speaker, our control panel, the other side's control panel and nuclear phase state set of knobs, electric wave carrier and power supply are installed on the machine plate, servicing unit adopts plug-in inductive coupler and cable under test socket by high frequency cable, this servicing unit uses the screen of cable under test as communication media, utilizes the electric wave carrier load signal to communicate.

And, described nuclear phase state set of knobs comprises eight knobs, is respectively: cable grounding the finish knob, personnel of knob, megger wiring that finish withdraws that safe distance knob, pressurization beginning knob, the correct knob of phase sequence, phase sequence mistake knob, pressurization stop knob, knob is finished in discharge to.

Advantage of the present invention and good effect are:

1, the present invention is when nuclear phase, utilize the copper shield of cable itself as cable two ends staff's communication medium, owing to be to work at the cable two ends, no matter have or not wireless communication signals, cable shield can serve as communication media in the stube cable two ends certainly, and avoiding passing on step by step occurs mistake easily, if intermediate link has a staff to understand unclear or represents unclear, mistake is pass on, and can cause the mistake in the work, even can bring danger to the staff.

The problem that intercoms mutually when 2, the invention solves the traditional cable nuclear phase and exist, no matter reach which kind of external condition, can both allow staff's direct communication at cable two ends, do not need intermediate link to pass on, and make cable two ends personnel can both see the instant operating state that the opposite end personnel are present, show with sound and light signal, accomplish effective prompting, in order to avoid make mistakes.

Description of drawings

Fig. 1 is the panel construction schematic diagram of servicing unit of the present invention;

Fig. 2 is operation principle schematic diagram of the present invention.

Embodiment:

For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows.Need to prove that present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention thus.

Nuclear phase servicing unit when a kind of cable is installed, servicing unit arranges panel 2, machine plate 7, panel is provided with mains switch 6, loud speaker 1, our control panel 3, the other side's control panel 5 and nuclear phase state set of knobs 4, electric wave carrier and power supply are installed on the machine plate, servicing unit adopts plug-in inductive coupler 9 and cable under test 10 sockets by high frequency cable 8, and concrete structure is referring to Fig. 1,2.This servicing unit uses the screen of cable under test as communication media, utilize the electric wave carrier load signal to communicate, the upper strata connects a servicing unit that overlaps when checking the cable phase sequence, the staff at cable two ends respectively holds a cover respectively, plays mutually the effect that intercoms, informs the other side's operating state.Described nuclear phase state set of knobs comprises eight knobs, is respectively: cable grounding the finish knob, personnel of knob, megger wiring that finish withdraws that safe distance knob, pressurization beginning knob, the correct knob of phase sequence, phase sequence mistake knob, pressurization stop knob, knob is finished in discharge to.

This servicing unit is two that are complementary, and uses for respectively the staff at cable two ends.

The near-end staff is responsible for the distant cable of megger, and the opposite end staff is responsible for cable grounding; The A that indicates on each side's control panel, B, C indicate the three-phase of cable, and three letter belows are corresponding LED light, and respectively corresponding yellow, green, red led.

The method that this servicing unit carries out the cable nuclear phase is:

1, both sides earlier begin the work on the control panel warning light and beat brightly, and both sides' warning light is bright mutually;

2, both sides will be separately the A phase relay indicating light knob of control panel open, by opening A earlier in near-end side, far end party is also opened A after receiving signal.Confirm to begin now setup test A phase cable;

3, far end party is screwed nuclear phase state respective knob with a certain phase cable grounding, informs that near-end side's personnel's ground connection finishes;

4, near-end side at A phase cable, connects the megger wiring, screws nuclear phase state respective knob, informs that the wiring of far end party megger finishes;

5, far end party is withdrawn safe distance to, screws nuclear phase state respective knob, informs that near-end side can begin operation;

6, the corresponding pressurization knob of nuclear phase state is screwed earlier in near-end side, begins the cable pressurization is begun to take place following situation:

Situation 1: if resistance to earth is 0, determine that then the cable of far end party ground connection is the A phase, at this moment stop pressurization, screw the correct knob of phase sequence of nuclear phase state, and screw nuclear phase state respective knob, inform that far end party has stopped pressurization; Far end party is discharged cable, and this phase cable is done A phase mark, screws the nuclear phase state phase nuclear phase button that finishes;

Situation 2: if resistance to earth is very big, determine that then the cable of far end party ground connection is not the A phase, at this moment stop pressurization, screw nuclear phase state phase sequence mistake knob, and screw and stop pressurizing button; " far end party is changed a phase cable again to this cable discharge, repeats above-mentioned steps, proceeds A phase cable nuclear phase, up to finding A phase cable.

Repeat above-mentioned steps, carry out B phase cable nuclear phase.

Do not select that the copper core is because need it to do electric test in the cable, and when making electric test, because the frequency of carrier communication apparatus is selected, do not influence the use of screen.

Claims

1. nuclear phase servicing unit when a cable is installed, it is characterized in that: panel, machine plate are set on the described servicing unit, panel is provided with mains switch, loud speaker, our control panel, the other side's control panel and nuclear phase state set of knobs, electric wave carrier and power supply are installed on the machine plate, servicing unit adopts plug-in inductive coupler and cable under test socket by high frequency cable, this servicing unit uses the screen of cable under test as communication media, utilizes the electric wave carrier load signal to communicate.

2. nuclear phase servicing unit when cable according to claim 1 is installed, it is characterized in that: described nuclear phase state set of knobs comprises eight knobs, is respectively: cable grounding the finish knob, personnel of knob, megger wiring that finish withdraws that safe distance knob, pressurization beginning knob, the correct knob of phase sequence, phase sequence mistake knob, pressurization stop knob, knob is finished in discharge to.