Small Current Grounding Line Selection Device

Short Description:

Overview

Small current wire selection device is an integral part of the industrial field circuit protection system, the device can accurately determine the location of the fault when the circuit system occurs grounding (arc or metallic) phenomenon, and the information for remote transmission, so as to facilitate the maintenance of the site personnel.

1.1. Function and characteristics

The structure of the device adopts modular design, and the main controller adopts 16-bit high performance single chip computer with high speed data acquisition module. Among the modules, CAN communication methods with redundant verification and multi-master transmission are used for data exchange and sharing.The panel uses the display screen and a simple 5-key operation function for man-machine dialogue.

The system adopts double watchdog mode to detect the operation of the system; wide working input voltage, high current signal measurement accuracy; fault and setting information memory function; real-time data and fault data remote transmission function.

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Product Detail

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Model and parameters and service environment

Table 1 of Technical Parameters of Small Current Line Selection Device

Technology, technique, reference, and mark	Technology, technique, reference, and number	Prepare, note
working voltage	AC/DC:85V~265V
Input the opening zero-order voltage, U0x	0~150V	The measurement accuracy is 1%
Enter zero-order current	20mA~3A	The measurement accuracy was 0.5%
Select line range	There are 54 bus routes in 3 sections	It can be set by itself

Key description

Keys include: menu key, confirmation key, + key, -key and return key.The reset button absorbs the alarm relay after the failure, and press the reset button to remove the alarm.Menu select mobile menu item, press the menu key to select the menu item order move, press confirm to enter the selected menu item.The + keys, and-keys are used to resize the data.The renderings are as follows:

product-description1

Interface definition and external dimensions

Wiring diagram

product-description2

Interface definition

	terminal A	terminal B	terminal C	terminal D	terminal E	terminal F	terminal G	terminal H
1	AC/DC220V	Standby 1	Current 1 *	Current 10 *	Current 19 *	Current 28 *	Current 37 *	Current 46 *
2	landing	Standby 2	Current 1	Current 10	Current 19	Current 28	Current 37	Current 46
3	AC/DC220V	+24V	Current 2 *	Current 11 *	Current 20 *	Current 29 *	Current 38 *	Current 47 *
4	Alarm open node 1	24V ground	Current 2	Current 11	Current 20	Current 29	Current 38	Current 47
5	Alarm open node 1	Open voltage 1	Current 3 *	Current 12 *	Current 21 *	Current 30 *	Current 39 *	Current 48 *
6	Alarm open node 2	Open voltage 1	Current 3	Current 12	Current 21	Current 30	Current 39	Current 48
7	Alarm open node 2	Open voltage 2	Current 4 *	Current 13 *	Current 22 *	Current 31 *	Current 40 *	Current 49 *
8	Alarm open node 3	Open voltage 2	Current 4	Current 13	Current 22	Current 31	Current 40	Current 49
9	Alarm open node 3	Open voltage 3	Current 5 *	Current 14 *	Current 23 *	Current 32 *	Current 41 *	Current 50 *
10	485 Ground	Open voltage 3	Current 5	Current 14	Current 23	Current 32	Current 41	Current 50
11	RS485-A		Current 6 *	Current 15 *	Current 24 *	Current 33 *	Current 42 *	Current 51 *
12	RS485-B		Current 6	Current 15	Current 24	Current 33	Current 42	Current 51
13			Current 7 *	Current 16 *	Current 25 *	Current 34 *	Current 43 *	Current 52 *
14			Current 7	Current 16	Current 25	Current 34	Current 43	Current 52
15			Current 8 *	Current 17 *	Current 26 *	Current 35 *	Current 44 *	Current 53 *
16			Current 8	Current 17	Current 26	Current 35	Current 44	Current 53
17			Current 9 *	Current 18 *	Current 27 *	Current 36 *	Current 45 *	Current 54 *
18			Current 9	Current 18	Current 27	Current 36	Current 45	Current 54

explain:
1.18 Products E, F, G, H;
2.36 products are G and H.

Overall dimensions and hole dimensions

The opening diagram is as follows, the opening size is 360 * 140; the installation screw opening: diameter 6~7mm.
Chassis depth: 180mm; Panel size: 396 * 148mm

product-description3

Application

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product name

product model

basic function

remarks

Small-scale current line selection device

NLK-DX

One trip can take 18 roads, plus + 600 standard

Bus line in section 3 is 2800 yuan below 18 roads, plus + 20 yuan for each additional road; up to 54 roads

Open hole is 360mm * 140mm

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