Products
PRODUCT CENTER
Integrated on-line monitoring device for cable sheath
Category: Product Center
Key words: equipment
Product Description
Introduction
The LHDL1908 cable sheath integrated on-line monitoring device adopts the principle of circulating current method, that is, under normal circumstances (I .e. one-point grounding), the circulating current on the metal sheath of single-core cable is extremely small, mainly capacitive current, and once the metal sheath forms a loop with multi-point grounding and the earth, the circulating current increases significantly, reaching more than 90% of the main current in serious cases. Real-time monitoring of metal sheath circulation and its variation can realize on-line monitoring of multi-point grounding fault of single-core cable metal sheath, so as to timely and accurately find grounding fault, fundamentally avoid the occurrence of cable accidents, and ensure the safe and reliable operation of the cable.
The LHDL1908 adopts GSM or RS485 as the communication mode, which is suitable for multi-point ground fault monitoring of single-core cables above 35kV.
system composition
The on-line monitoring of cable sheath circulation is realized by LHDL1908 cable sheath integrated monitoring device host and current transformer, temperature and anti-theft cutting sensor. The open current transformer is installed on the ground wire of the cable sheath, and the monitoring device is introduced after being converted into the secondary signal. The temperature sensor is used to monitor the cable temperature, and the anti-theft cutting sensor is used to monitor the stolen cutting of the circulating ground wire.
The composition of the cable sheath integrated online monitoring system is as follows:
Functional features
Real-time monitoring of three-phase cable sheath grounding current, total grounding current and any phase of the main cable operating current;
◎ Real-time monitoring of three-phase cable temperature and anti-theft monitoring of cable sheath grounding;
◎ monitoring time interval can be set according to user requirements;
◎ alarm parameters can be set according to user requirements and whether the corresponding monitoring parameters are allowed to generate alarms;
◎ Statistics set the maximum value, minimum value and average value in the time period;
◎ Real-time monitoring of single-phase grounding current maximum minimum value ratio, grounding current and load ratio single-phase grounding current change rate during the statistical period, and
Alarm handling;
◎ The measurement data can be sent at any time;
◎ When one or more monitoring parameters alarm can be specified, alarm information will be sent to the specified mobile phone;
◎ The system structure configuration is flexible, all monitoring sensors can be increased or decreased according to user requirements configuration;
◎ A variety of data transmission interface: RS485 interface, GPRS/CDMA;
◎ Support IP66 protection level.
Main technical indicators of the system
| ReferenceNumber |
RefersStandard |
|
|
Current measurementQuantity |
Running current measurementQuantity |
1Road,0.5A～1000A(Other requirementssystem) |
| sheath grounding current measurement |
4-way, 0.5A ~ 200A (others need to be customized) |
|
| Measuring fineDegree |
±(1 .2A) |
|
| Week of measurementPeriod |
5 seconds ~ 200 seconds can be set |
|
|
Temperature measurementQuantity |
FanWai |
-20 ℃ ~ 180 ℃ |
| FineDegree |
± 0.5 ℃ |
|
| Week of measurementPeriod |
10 seconds ~ 200 seconds can be set |
|
| Working electricitySource |
AC220V±15%/50Hz |
|
| WorkRate |
≤ 10W |
|
* Note: Please be sure to fill in the information accurately and keep the communication unblocked. We will get in touch with you as soon as possible.
Mobile site
Scan Now !
lhdqsw@126.com：
18182109884：
图片alt标题设置： Changsha Lanhong Electric Technology Co., Ltd.
表单验证提示文本： Content cannot be empty!
循环体没有内容时： Sorry,no matching items were found.
CSS / JS 文件放置地