CN204332204U - A kind of 10kV cable fault simulation device - Google Patents

Abstract

The utility model discloses a 10kV cable fault simulation device, which comprises a casing and an elbow joint of an incoming line installed on the casing, a connecting wire core, a plug-in box and an elbow joint of an outgoing line, wherein four incoming elbow joints are The connector and the four outlet elbow joints are electrically connected to the plug-in box through the connecting wire core, and the inlet elbow joint and the outlet elbow joint are connected to the external cable to connect the device in series to the actual cable line. A fault simulation plug-in is assembled in the plug-in box. The utility model simulates various 10kV cable faults by combining fault simulation plug-ins in the plug-in box, which facilitates practitioners to perform fault detection training, improves training efficiency, and saves training costs.

Description

A 10kV cable fault simulation device

technical field

The utility model relates to the technical field of distribution cable detection.

Background technique

During the operation of the cable, external force damage, long-term overload operation, poor production or construction quality and other reasons may cause the cable to fail. Under different circumstances such as different voltage levels, distances, leakage voltages, and cable damage, the fault characteristics and detection equipment used are different, which requires relevant practitioners to have skilled testing techniques and Rich practical experience.

However, the frequency of faults in actual cable lines is relatively low, and some employees often cannot get the opportunity to detect cable faults for a long time. It is difficult to train the testing technology, and the accumulation of practical experience is very slow, which directly affects the improvement of the skill level of employees. .

Utility model content

The technical problem to be solved by the utility model is to provide a 10kV cable fault simulation device, which can accurately simulate various faults occurring in the operation of 10kV cable lines, facilitate practitioners to carry out fault detection training, improve training efficiency, and save training costs.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a 10kV cable fault simulation device, including a casing and an elbow joint at the incoming line end installed on the casing, a connecting wire core, a plug-in box and an elbow joint at the outgoing line end, Among them, the four inlet end elbow joints and the four outlet end elbow joints are electrically connected to the plug-in box through the connecting wire core, and the inlet end elbow joints and the outlet end elbow joints are connected to the external cable to connect the device It is connected in series in the actual cable line, and a fault simulation plug-in is combinedly installed in the plug-in box.

Preferably, the fault simulation plug-ins include normal plug-ins, disconnected open plug-ins, short-circuit plug-ins, low-resistance/high-resistance plug-ins and flashover high-resistance plug-ins.

Preferably, the normal plug-in contains a complete metal core of a 10kV cable.

Preferably, the disconnected open circuit insert contains a disconnected 10kV cable metal core inside.

Preferably, the short-circuit plug-in contains two 10kV cable metal cores, and the metal cores of the two cores are short-circuited.

Preferably, the low-resistance/high-resistance plug-in contains two 10kV cable metal cores, and an adjustable resistor is connected between the two cores.

Preferably, the flashover high-resistance plug-in contains two 10kV cable metal cores, and a high-voltage varistor is connected between the two cores.

The technical solution adopted by the utility model is to simulate various 10kV cable faults by combining the fault simulation plug-ins in the plug-in box, which is convenient for practitioners to carry out fault detection training, improves training efficiency, and saves training costs.

Therefore, the beneficial effects of the utility model are:

1. The device can simulate various typical faults of 10kV cables. The simulation range is wide and the simulation effect is good. The simulated faults can be accurately detected by the general cable fault tester;

2. The device is small in size, flexible in fault type conversion, and easy to operate;

3. The device can be applied to cable fault detection training and actual cable fault detection drills, which is conducive to improving the skill level of cable detection personnel and enriching experience in cable fault detection.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is the overall structural representation of the utility model;

Figure 2 is a schematic diagram of fault simulation plug-ins placed side by side;

Fig. 3 is a schematic diagram of simulating a phase A disconnection and open circuit fault;

Fig. 4 is a schematic diagram of simulating a BC phase short-circuit fault;

Fig. 5 is a schematic diagram of simulating a CN-phase flashover high-resistance fault.

Detailed ways

As shown in Figure 1, a 10kV cable fault simulation device includes a housing 1 and an incoming elbow joint 2 installed on the housing, a connecting wire core 3, a plug-in box 4 and an outgoing elbow joint 5, wherein, The four inlet elbow joints 2 and the four outlet elbow joints 5 are electrically connected to the plug-in box 4 through the connecting wire core 3, and the inlet elbow joints and the outlet elbow joints are connected to external cables. The device is serially connected to the actual cable line, and a fault simulation plug-in is installed in the plug-in box.

As shown in Figure 2, the fault simulation plug-in includes a normal plug-in 4.1, a disconnected open circuit plug-in 4.2, a short-circuit plug-in 4.3, a low-resistance/high-resistance plug-in 4.4 and a flashover high-resistance plug-in 4.5, and the above five plug-ins can be combined and installed side by side in the plug-in box. Among them, the normal plug-in contains a complete 10kV cable metal core. The broken wire open plug-in contains a broken 10kV cable metal core inside. The short-circuit plug-in contains two 10kV cable metal cores, and the metal cores of the two cores are short-circuited. The low-resistance/high-resistance plug-in contains two 10kV cable metal cores, and an adjustable resistor is connected between the two cores, and its adjustable range is 50Ω—50MΩ. The flashover high-resistance plug-in contains two 10kV cable metal cores, and a high-voltage varistor is connected between the two cores.

A kind of method utilizing above-mentioned 10kV cable fault simulator to carry out 10kV cable fault simulation, its realization method is as follows:

(1) Simulate disconnection and open circuit faults. Combining a disconnection and open circuit plug-in 4.2 and three normal plug-ins 4.1 and installing them side by side in the card box 4 can simulate a disconnection and open circuit fault. Wherein, if the disconnection and open circuit plug-in 4.2 is installed in the positions ①, ②, ③, and ④ of the plug-in box 4, then correspondingly simulate A, B, C, and N phase disconnection and open circuit faults in turn.

Among them, if the disconnection and open circuit plug-in 4.2 is installed in position ①, and three normal plug-ins 4.1 are installed in position ②③④, then the A-phase disconnection and open circuit fault is simulated (as shown in Figure 3); if the disconnection and open circuit plug-in 4.2 is installed in Position ②, three normal plug-ins 4.1 are installed in position ①③④, then the B-phase disconnection and open-circuit fault is simulated; if the disconnection and open-circuit plug-in 4.2 is installed in position ③, three normal plug-ins 4.1 are installed in position ①②④, then the C-phase is simulated Open circuit failure.

(2) Simulate short circuit fault. A short-circuit fault can be simulated by combining a short-circuit plug-in 4.3 and two normal plug-ins 4.1 and installing them side by side in the plug-in box 4 . Wherein, if the short-circuit plug-in 4.3 is installed in the positions ①②, ②③, and ③④ of the plug-in box 4, then correspondingly simulate the short-circuit faults of AB, BC, and CN in turn.

Among them, if the short-circuit plug-in 4.3 is installed in the position ①②, and the two normal plug-ins 4.1 are installed in the positions ③ and ④, then the AB phase short-circuit fault is simulated; if the short-circuit plug-in 4.3 is installed in the position ②③, the two normal plug-ins 4.1 are installed in the position ①, ④, the BC phase short-circuit fault is simulated (as shown in Figure 4); if the short-circuit plug-in 4.3 is installed in the position ③ ④, and two normal plug-ins 4.1 are installed in the positions ①, ②, the CN-phase short-circuit fault is simulated. the

(3) Simulate low-resistance or high-resistance faults. Combining a low-resistance/high-resistance plug-in 4.4 and two normal plug-ins 4.1 and installing them side by side in the plug-in box 4 can simulate phase-to-phase low-resistance or high-resistance faults.

Among them, if the adjustable resistor inside the low-resistance/high-resistance plug-in 4.4 is set to any value from 50Ω-1000Ω, a low-resistance fault is simulated. If the adjustable resistor inside the low-resistance/high-resistance plug-in 4.4 is set to Any value of 1000Ω-50MΩ simulates a high-resistance fault; if the low-resistance/high-resistance plug-in 4.4 is installed in the positions ①②, ②③, and ③④ of the plug-in box 4, it corresponds to simulating the low-resistance or high-resistance faults of AB, BC, and CN in turn .

(4) Simulate flashover high-resistance faults. Combining one flashover high-resistance plug-in 4.5 and two normal plug-ins 4.1 and installing them side by side in the plug-in box 4 can simulate a flashover high-resistance fault. Among them, if the flashover high-resistance plug-in 4.5 is installed in the positions ①②, ②③, and ③④ of the plug-in box 4, then correspondingly simulate the flashover high-resistance faults of AB, BC, and CN in sequence.

Among them, if the flashover high-resistance plug-in 4.5 is installed at position ①②, and two normal plug-ins 4.1 are installed at positions ③ and ④, then the AB phase flashover high-resistance fault is simulated; if the flashover high-resistance plug-in 4.5 is installed At position ②③, two normal plug-ins 4.1 are installed at positions ① and ④, then the BC phase flashover high-resistance fault is simulated; if the flashover high-resistance plug-in 4.5 is installed at position ③④, two normal plug-ins 4.1 are installed at Positions ① and ② simulate the flashover high-resistance fault of the CN phase (as shown in Figure 5).

Claims (7)

1. a 10kV cable fault simulation device, it is characterized in that: comprise shell and be installed on end of incoming cables elbow-type joint on shell, connect core, card cage and leading-out terminal elbow-type joint, wherein, four end of incoming cables elbow-type joints are electrically connected with card cage respectively by being connected core in inside with four leading-out terminal elbow-type joints, and end of incoming cables elbow-type joint and leading-out terminal elbow-type joint are connected with external cable by device serial connection in actual cable circuit, in card cage, combination is provided with fault simulation plug-in unit.

2. a kind of 10kV cable fault simulation device according to claim 1, is characterized in that: described fault simulation plug-in unit comprises normal plug-in unit, broken string open circuit plug-in unit, short-circuit insert, low resistance/high resistance plug-in unit and flashover high resistant plug-in unit.

3. a kind of 10kV cable fault simulation device according to claim 2, is characterized in that: described normal plug-in unit inside comprises a complete 10kV cable metal core.

4. a kind of 10kV cable fault simulation device according to claim 2, is characterized in that: described broken string open circuit plug-in unit inside comprises a 10kV cable metal core disconnected.

5. a kind of 10kV cable fault simulation device according to claim 2, is characterized in that: described short-circuit insert inside comprises two 10kV cable metal cores, two core metal short circuits.

6. a kind of 10kV cable fault simulation device according to claim 2, is characterized in that: described low resistance/high resistance plug-in unit inside comprises two 10kV cable metal cores, is connected with adjustable resistor between two cores.

7. a kind of 10kV cable fault simulation device according to claim 2, is characterized in that: described flashover high resistant plug-in unit inside comprises two 10kV cable metal cores, is connected with high pressure varistor between two cores.