line_fault_indicator

SJ1DX Overhead Intelligent Fault Indicator

Description:

SJDX and SJ1DX appearance, characteristics, functions and applications, technical indicators are the same, but their internal structure, its working principle is also different.
SJ1DX within only a core intelligent detection circuit chip, and SJDX is detection of short-circuit and earthing fault of two intelligent detection chip.

Performance characteristics:

The performance characteristics of the fault indication: normal operation, the window to display white; short circuit, grounding fault, the window as shown in red.
The on-line operation: mounted directly on the line, maintenance free.
The strong interference resistance: the signal is not affected by line, inrush current, harmonics, current fluctuations, cable distributed capacity bypass effects.
Automatic reset: action after the flop, according to the set time automatically reset, DS-2DX cable fault indicator can be manually reset.
The charged handling: charged handling is extremely simple, does not affect the line operation.

Working principle:

The working principle of grounding short circuit combined principle of fault principle and SJ1DX the same, Grounding detection principle: sampling earthing instantaneous capacitor current first half wave and earthing instantaneous voltage first half wave, comparing its phase, when the sampling ground transient capacitance current mutation and greater than a certain value, and with the earthing instantaneous voltage first half wave phase, while the wire from the ground voltage is reduced, it is judged line earthing, otherwise no grounding line. Used to judge the grounding fault indicator diagram:

Description:

SJDG and SJDX appearance, characteristics, functions and applications, technical indicators are the same, their internal structure is the same, but the DS-JDG with night light emitting device.

The overview:

Four in one intelligent multifunctional indicator: should the domestic customers in response, night view fault flop effect must bring power to see clearly, and must be one by one light to find the point of failure, the visual distance is short, the night to find out the fault rate is relatively is slow, so I in the original two products installed a night looking very fast, intuitive light emitting device to meet customer requirements, namely by turning night luminous SJDG series.

The working principle of:

Grounding fault principle and two identical, in the original combo fault indicator is arranged on three photoelectric tubes and brightness luminous tube. During the day there is fault, indicator card display. The night when it is dark, a photoelectric tube resistance is large, so the conductive chip, card reset, while conducting light-emitting tube. When the day breaks, for a predetermined time to reset indicator, a photoelectric tube receives light resistance decreases, microprocessor reset, cutoff LED work, conducting flop mechanism, therefore also restore flop instructions.

Application range:

Mounting in long-line middle section and a branch at the entrance, can indicate the line fault and fault branch.
The installed in the substation exports, can ascertain whether the fault caused by user.
The installed on users with transformer incoming line, can determine whether the failure is caused by user.
Mounting in cables and overhead line junction, can distinguish whether the fault in cable section.

The installation tool:

Bottom leftt for SJ1DX, SJDX, SJDG installation tools, specific installation method only needs a rod placed in the bottom mounting tool,The indicator top bolt after draining into the installation tool, then the indicator card into the cable is installed successfully.

Short circuit fault of SJ2DG photoelectric indicator, mainly used for ring network cabinet and box, small volume, convenient installation.
When short circuit occurs in the circuit, LEO red immediately luminous indicating fault.

The Description:

The adjacent anti-interference ability is less than 10cm.
It has a self-checking function, to ensure the normal work of the fault indicator.
The photosensitive switch safe use, and convenient.

Installation method:

To remove U type hoop, the cable passes through the hoop, hoop on the installation, tighten the bolt is installed successfully.

Line Fault Indicator
SJ1DX Overhead Intelligent Fault Indicator	Feature: The characteristics of high strength and high perspective of aviation material, and through nanotechnology treatment, better perspective, pollution resistance, aging resistance, long service life and maintenance-free; High performance lithium battery, service life of up to 8 years; The special chip and single chip imported components circuit board; The aviation and nanometer material; Effects of the nickel plating treatment, permeability strong. Charged installed card line structure; The use of red fluorescent paint, good visual, it can clearly indicate the night light; Effects of and long-term outdoor ultraviolet radiation does not fade display body. Features and benefits: Effects of shortening troubleshooting time, increase the sale of electricity and power supply reliability; The accurate indication of transient fault, conducive to exclude power supply problems; To find the hidden permanent fault points provides technical means; The shortened fault point searching time, reduce labor intensity of line; TheDivision of fault responsibility area, clear responsibility person; Avoiding the traditional repeatedly pull road closing line to power the impact of the equipment. Technical indicators: Technical indicators suitable voltage grade:U≥6KV ?Reset time of action:6、12、24、36h Applicable conductor current: I = 600A Use environment temperature: - 35 and T + 65 Application of wire diameter: 16mm2 D 240mm2 The move as time number: > 5000 times The action response time: 0.06S < T < 3S In static state power consumption: = 10uW 　 Action principle: The action principle of short circuit detection: according to the phenomenon of short circuit, short circuit instantaneous current in positive mutation, protection act to cut power for reference.For judging the short-circuit fault indicator diagram

	By 2 # line B is 2, 5, 8 and 2 # indicator line C is 3, 6, 9 and 11 display indicator turn red indicator and the 12 indicator is white, can be judged D point fault.