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As of 2019, GCM Industry and its affiliated companies have 5 advanced mining machine production bases and one production base under construction, with a total production area of 1,200,000 square meters, which can better meet more needs of global customers in the future.


Beginning in 1987, GCM industry has developed steadily and steadily in the field of mining machines, and has gradually formed a complete R&D, production, sales and service system.

Click the links below for detailed information about our areas of expertise and broad range of equipment offerings.

Typical Electrical Drawing Symbols and Conventions.

Basics 6 7.2 kV 3-Line Diagram : Basics 7 4.16 kV 3-Line Diagram : Basics 8 AOV Elementary & Block Diagram : Basics 9 4.16 kV Pump Schematic : Basics 10 480 V Pump Schematic : Basics 11 MOV Schematic (with Block included) Basics 12 12-/208 VAC Panel Diagram : Basics 13 Valve Limit Switch Legend : Basics 14 AOV Schematic (with Block included)

IOT Projects for B.Tech and M.Tech Engineering Students

The above figure represents the block diagram of underground cable fault detection and displays over the internet project. This project circuit block diagram consists of various blocks such as a power supply block, microcontroller block, relays, LCD display, and GSM module.

Metal detector circuit diagrams and projects

Nov 10, 2009· Metal detector circuit diagrams and projects. Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced.

: cable detector

Kolsol Underground Wire Locator Cable Tester F02 With Earphone for Locate Wires and Control Wires Cables Pet Fence Wires. 4.0 out of 5 stars 551. ... allsun Pro Automotive Short and Open Finder Circuit Tester Wire Tracker Circuit Finder DC 6-42 V Short Circuit Detector Short Detector …

Invisible Broken Wire Detector | EEWeb Community

The whole circuit can be accommodated in a small PVC pipe and used as a handy broken-wire detector. Before detecting broken faulty wires, take out any connected load and find out the faulty wire first by continuity method using any multimeter or continuity tester.

(PDF) Underground Cable Fault Distance Finding using ...

— In Power system Generation to distribution has more long cable are used and now we used underground cable. When the underground cable is used to distribution in the urban area, sometime fault occurs is an underground cable that time finding fault

(PDF) Design and Analysis of Pulse Induction Underground ...

Design and Analysis of Pulse Induction Underground Mines Detection System. ... The design block diagram for PI detection system is ... By methods of cable delay and cable open circuit reflection ...

Wire Fault Detector - Arduino Project Hub

Nov 03, 2018· So it is necessary to know the exact location of faults in the underground cables. Whatever the fault is, the voltage of the cable has the tendency to change abruptly whenever a fault occurs. We make use of this voltage across change resistors to detect the fault. In the event of short circuit (Line to Earth) fault, the voltage accordingly.

Arduino Based Underground Cable Fault Detection ...

May 17, 2016· Arduino based underground cable fault detection circuit. The circuit is consists of 4 line display, arduino and resistance measurement circuit. Main component of the underground cable fault detection circuit is low value resistance measurement. It is constructed using a constant current source of 100mAmps.

How To Locate Faults In Cables? Types of Cable Faults

Open circuit fault can be occurs when cable is pulled out of its joint or a break occurs in the cable. Such a fault can be traced by carrying out capacity test. The capacitance of the faulty cable is measured from both ends of the cable either by means of ballistic galvanometer or by bridge method.


3) Less fault occur in underground cable 4)Underground cable fault location model are applicable to all types of cable ranging from 1kv to 500kv&other types of cable fault such as-Short circuit fault, cable cuts, Resistive fault,Sheath faults, Water trees, Partial discharges. 5) Improved public safety.

Detection of fault location in underground cable using arduino

Jul 14, 2017· Detection of fault location in underground cable using arduino ... Faults in Underground cables • When there is a break in the conductor of a cable, it is called open circuit fault. • The open-circuit fault can check by a megger. ... Introduction to circuit Diagram • While a fault occurs for some reason, at that time the repairing process ...

How underground cable locator works? -

Locating underground cable is necessary not only for finding faults, but also for undertaking any excavation possibly near a cable route. This article will explain the types of underground cable locators and how they work.

Broken Wire Detector Circuit using IC CD4069

This circuit can also serve as EMF detector and can detect the Electric Field generated by Alternating Current (AC). The devices which run on A.C, like electrical irons, grinders, air conditioners, flood lights, are powered by long 2 or 3 core cables connected to the AC mains.

How to Find Buried Copper Wire | Sciencing

Finding underground copper wires can be a do-it-yourself project. Renting an underground wire locator is one method for finding electric wires, cable and phone lines. Utilities like gas and sewer lines should also have copper wires for location purposes. Or, call your state's location service.

Construction of Underground Cables - StudyElectrical.Com

An underground cable essentially consists of one or more conductors covered with suitable insulation and surrounded by a protecting cover. Although several types of underground cables are available, the type of cable to be used will depend upon the working voltage and service requirements.. In general, an underground cable must fulfill the following necessary requirements :

Fix Underground Wiring - The Family Handyman

You'll find the cable anywhere between 12 and 24 in. deep. When you locate the cable, use a noncontact voltage detector to ensure there's no power. If you have a broken underground line and no clue where the break is, hire an electrician with an underground open/short locator.

Underground Cable Locator Rental | Cable Detectors ...

Use our Underground Cable Locator Rental to locate buried cables. Sunbelt Rentals offers competitively priced Cable Detectors. Our team is here to support you …

IOT Underground Cable Fault Detector Project

Download Project Document/Synopsis Underground cables are prone to a wide variety of faults due to underground conditions, wear and tear, rodents etc. Also detecting fault source is difficult and entire line is to be dug in order to check entire line and fix faults. So here we propose an cable fault detection …

Detection of Underground cable fault using Arduino

Detection of Underground cable fault using Arduino Padmanaban.K1, Sanjana Sharon.G2, Sudharini.N 3,Vishnuvarthini.K4 1 Assistant Professor,2,3,4 Student Velammal College of Engineering and Technology,Madurai -----***-----Abstract -The main objective of this project is to detect the faults and abnormalities occurring in underground cables

Blavier Test | Murray Loop Test | Varley Loop Test ...

Aug 18, 2018· Blavier's Test is used to find the earth fault location in an underground cable. The two ends faulty cable are mentioned as sending end and far end respectively as shown in fig 1. In this test, the sending end of the cable must be open and isolated and the resistance between sending end and earth point is measured by keeping the far end isolated from earth and then it measured keeping far ...

3 Ways to Build a Metal Detector - wikiHow

Jul 31, 2019· To build a metal detector, start by getting a portable AM/FM radio and a calculator. Then, tune the radio to the highest band on the AM setting. Next, turn on the calculator and position the radio and calculator back to back until you hear a steady, dull tone. Once you hear the tone, tape the devices together and attach them to a broomstick or ...

Underground line fault distance detector using GSM - YouTube

May 15, 2017· TDR Cable Tester - Distance to Fault (DTF) (MOHR CT100 Ch. 5) Time Domain Reflectometer - Duration: 4:02. MOHR Test and Measurement LLC 7,780 views

Metal Detector using a 2 Pulse Induction Coil

A block diagram of the circuit can be seen in Figure 2. Figure 2 – Block Diagram of the Pulse 1 Metal Detector The basic design of the metal detector consists of four parts as seen above. These are: • The power supply (four IC's), • The pulse generation circuit (four 555's, and coil),

Underground Cable Fault Distance Locator Circuit and Working

Underground Cable Fault Distance Locator Circuit. This project uses the Ohms Law concept, when a low voltage DC is applied to the feeder end through a series resistor, then the current would differ based on the location of fault occurred in the cable.In case is there any short circuit occurred from line to ground, then the voltage across series resistor alters accordingly, then it is fed to an ...

Arduino based underground cable fault distance locator

Apr 04, 2018· Hi guys! I am working on a project called Arduino based underground cable fault detection system. The system detects a voltage drop when the circuit is short-circuited on each phase and displays the exact location of the fault in kilometres else it should display no fault.

What is Cable Testing. How is Cable Testing Done ...

Why is Cable Testing Needed? Cable testing is made to drop down testing times. This is done to check the: ... The insulation test is combined with a short-circuit test and high voltage test in DC. ... In any overhead or underground network, the earth resistance at any point along the length of a LV feeder is to have a maximum resistance of 10 ...

Development of a Prototype Underground Cable Fault …

underground cables are, 1. Open circuit fault. 2. Short circuit fault. 3. Earth fault. 1. Open circuit fault When there is a break in the conductor of a cable, it is called open-circuit fault. The open-circuit fault can check by a megger. For this purpose, the three conductors of the 3 core cable …