BKXHG ARC suppression and elimination cabinet

BKXHG ARC suppression and elimination cabinetSummaryIn China's 3-35V power supply system, most of them are neutral point systems. The power grid can still operate with faults, which greatly reduces the operating costs and improves the availabili

Published in2018-08-03

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Detailed description

BKXHG ARC suppression and elimination cabinet

Summary

In China's 3-35V power supply system, most of them are neutral point systems. The power grid can still operate with faults, which greatly reduces the operating costs and improves the availability of the power supply system. However, when the single-phase grounding current is large, the arc grounding overvoltage and the inter-circuit are easy to occur, which do great harm to the power supply equipment. Previous solutions were to install arc suppression line compensating capacitive current at neutral points to suppress the probability of arcing at fault points. Obviously, the purpose of this method is to eliminate arc light. However, it is difficult to compensate the capacitive current effectively because of the characteristics of the arc suppression coil itself, especially the damage caused by the high frequency component to the power supply equipment can not be overcome. Intelligent arc extinguishing device, the device in the presence of arc grounding, through a group of vacuum contactors can be controlled separately, so that the fault grounding, to completely eliminate the purpose of arc light.

Z type and meaning

Function selection

Rated current (according to the maximum earth capacitance current of the system) Voltage level

Use of the environment

u Environmental quality: indoor -15℃-60℃, special can achieve -30℃~+60 ℃

u Altitude: less than 2000m, special case 4000m

u Use environment: there should be no explosive flowers such as dust, gas and smoke.

Functional characteristics

u Standard function

u Selection function

Replace original PT cabinet function Harmonic elimination function

Overvoltage protection function Line selection function

Arc suppression function

u Characteristic

(1) The 32-bit processor based on ARMTTDM-S kernel is adopted in PHILIPS, and multi-core technology is used to collect and analyze data. Each unit has a clear division of labor, which greatly improves the acquisition rate and the judgment is more accurate.

(2) when the system is single-phase arc grounding, it can be quickly transformed into metal grounding.

(3) when the system generates metal grounding or PT breaks, the device will alarm in time.

(4) The PT open triangle voltage is detected cyclically, real-time data acquisition is carried out, and the data is analyzed and calculated by digital measurement, filtering, amplification and other digital signal processing techniques. If there is a fault, the current fault type can be judged: if it is ferroresonance. The ferroresonance of 17Hz (1/3 frequency division) 25Hz (1/2 frequency division) 50Hz (power frequency) 150Hz (3 times frequency) and above can be eliminated by instantaneous starting harmonic elimination circuit.

(5) selectable automatic switching or manual switching.

(6) the device has an accident recall function. It can record the time of 30 events and the action state of the device.

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PRODUCTS

BKXHG ARC suppression and elimination cabinet

Detailed description

Summary

Use of the environment

Functional characteristics