One,Product Introduction
       HSC6884 microcomputer type DC system insulation monitor is used for DC operating power supply of various power plants and substations and other DC operating power supplies The system is used to monitor the DC system voltage, insulation and insulation status of each branch. Installed byHSC6884(host), HSC6889(residual current sensor acquisition module), CT(leakage sensor) etc.3 Partial composition.
Second, Installation principle
      thisdevice adopts access100KUnbalanced bridge resistance mode, real-time monitoring of the bus voltage, through calculation, the real-time insulation status of the bus is obtained, When the insulation is lower than the setting value set by the user, a corresponding alarm will be generated, and the feeder branch circuit will be automatically inspected. When a branch circuit is less than the setting value, the corresponding branch circuit and branch circuit insulation resistance will be displayed.< br /> Three.Product Features

● Real-time collection and display of bus voltage and bus insulation.

● can monitor two busbars at the same time, and 280The insulation status of each branch can accurately locate the busbar section, branch number and positive and negative polarity of the insulation drop; and can detect the positive and negative balance grounding of the same branch or different branches.

● DC cross-current fault monitoring: When a DC mutual fault occurs in the DC system, the device can quickly report the DC mutual fault. The occurrence of a DC mutual fault is mainly summarized into four ways: ①.The negative end of the first busbar and the negative end of the second busbar are connected to each other; ②.The positive end of the first busbar and the positive end of the second busbar are mutually Channeling; ③. The positive end of the first busbar and the positive end of the second busbar and the negative end of the first busbar and the second busbar The negative ends of the segment busbars are connected to each other at the same time; ④. The negative end of the first busbar and the positive end of the second busbar are connected to each other, or The positive end of the first section of the busbar and the negative end of the second section of the busbar move each other .

● It can quickly and accurately detect the size of the AC voltage signal entering the DC system to the ground, And can accurately determine whether the entry point of the AC voltage signal is at the positive or negative pole, and the alarm value can be set.

● can provide alarm records such as overvoltage, undervoltage, insulation drop, grounding alarm, etc., and the records are saved The accident occurred voltage value, insulation value, time and bus section or branch number.

● Provides setting and display functions for setting values such as overvoltage, undervoltage, and low insulation resistance .

● The bus operation mode can be set according to the actual operation status of the monitored DC system.

● can be used in 0~280.

● can passRS-485Serial interface for data exchange with system monitoring.

● Using the principle of unbalanced bridge resistors, not No signal is added to the DC system, so it has no effect on the DC systemeffect< span style="line-height:2;">.

● The detection accuracy of branch insulation resistance is not affected by distributed capacitance, and it can detect positive and negative balance grounding .

● The device host and the transformer acquisition module use485Transmission technology, simple wiring, strong anti-interference ability, fast and accurate line selection, and high reliability.

● Each busbar has four sets of empty contacts for alarm output, which can adapt to different site needs of users.< /span>

● There is a non-volatile memory in the device, the memory information will not be lost even if the device is powered off .

●  Power Plant Communication Room

●  Power industry substation, substation communication room