Anhui, China
Business Type:
Number of Employees:
Year of Establishment:
Management System Certification:
OHSAS18001:2007, ISO9001:2015 Certificate, ISO14001:2015 Certificate
Average Lead Time:
Peak season lead time: within 15 workdays
Off season lead time: within 15 workdays
OEM/ODM Service

Device, Line Selection, Grounding manufacturer / supplier in China, offering Km-Dlx Small Current Grounding Line Selection Installation, Km-Ftb Large Capacity Explosion-Proof Overvoltage Protector, Km-Gdy Over Voltage Suppression Cabinet and so on.

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Supplier Homepage Products Power Device Km-Dlx Small Current Grounding Line Selection Installation

Km-Dlx Small Current Grounding Line Selection Installation

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Min. Order / Reference FOB Price
50 Pieces US $17,220-22,610/ Piece
Port: Shanghai, China
Production Capacity: 1000 Pieces/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Usage: Power Supply System
Type: Module
Support Network: Ethernet
Information content: Data
Certification: ISO, GB
Condition: New

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Basic Info

Model NO.
Transport Package
Wooden Box
Chinese, Hefei
                                 KM-DLX low current grounding line selection device
Product Overview

The KM-DLX low current grounding line selection device adopts the multi-CPU system of INTEL 80C 196KC microprocessor, and combines with many new technologies to collect multi-channel signals simultaneously. The acquisition system works independently and does not occupy the working time of the main CUP. It has the characteristics of fast acquisition speed and strong anti-interference ability. This product adopts the new algorithm to overcome the disadvantage of low line selection rate when the arc is grounded.
Km-Dlx Small Current Grounding Line Selection Installation

Field of application

This product can be used to select the small current system to meet the following requirements:

1. Small current system with neutral point ungrounded

2. The four largest bus system has no more than 36 circuits.

Widely used in power system substations, power plants and coal mines, iron and steel, metallurgy, chemical, cement and other large factories and mines power supply system.

Performance and characteristics

1. This product selects INTEL 80C 196KC microprocessor chip.

2. In view of the low accuracy of arc grounding judgment by other domestic small current line selection equipment, the advanced maximum increment method is adopted to judge arc grounding.

3. Three schemes can be selected for different situations.

4. Chinese characterization Output Information Section can recall the data of 8 faults by LCD and print them out by micro printer.

5. Two optional data communication interfaces are provided: RS-232 port.RS-48 port;

Conditions of use

1. use of environmental conditions

Ambient temperature: indoor -5 ºC~+40 ºC, special can achieve -40ºC ~+60ºC.

Atmospheric pressure: 80~110Kpa

Relative humidity: 90% (25 ºC),50% (40 ºC)

The use of the environment: can not be explosive dangerous media, the surrounding media can not contain corrosion and damage to the insulation of conductive media or gas, not allow the environment to fill with steam and contain more serious mold, no violent vibration source.

Installation sites: should be protected against wind, rain, sand and dust-proof facilities.

Users will need to negotiate with the company for the above environmental conditions.

2. basic working conditions

1) Minimum working voltage: 20V; minimum power frequency current: 20mA. (DL/T 872-2004, 4.5.1a).

2) Maximum capacitance current ratio: 50%; that is, the system outlet to the ground capacitance; the current of the largest and the system capacitance current ratio must be less than 50%. (4.5.1b in DL/T872-2004)

3) The total harmonic voltage distortion coefficient of single-phase grounding: 1.0%-6.0%; (DL/T 872-2004, 4.5.1d).

4) The minimum line selection must be connected to three outgoing lines, and the two capacitor current generated by the three outgoing lines must be greater than 20Ma.

5) Because the line selection device requires a minimum operating current of 20 mA, the selection of the zero-sequence CT (or three-phase CT) ratio in the system is required, that is, the total capacitive current of the system subtracts the capacitive current of the output line, and the change of the zero-sequence CT must be much greater than 20 Ma and less than 2A.

6) The total capacitive current of the system refers to the total capacitive current of all cables under the same generator (or the same main transformer). Sometimes it is not only a cable connected under a switching station, but also possibly the cable of its lower switching station.

Electrical parameters

1. Input rating
Zero sequence voltage (U0): 100V
Zero sequence current (I 1~I36): <2A and >20mA
Power supply voltage: DC 220V±10% power consumption <100W
Number of zero-sequence current loop input: ≤ 36 (four busbars)
Note: The factory default is three-section bus. If you need four busbars, please indicate in the ordering agreement.

2. Output rating
A total of open normally connected contacts: 5 pairs
Contact allows current: ≤5A/DC220V
All relay output contacts can be connected to alarm output

Km-Dlx Small Current Grounding Line Selection Installation
Km-Dlx Small Current Grounding Line Selection Installation

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