Cable Theft Commander Manual

7/27/2019 Cable Theft Commander Manual

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Cable Theft Monitor V2 Manual

Version 1.01

Before Attempting to connect or operate this product, please read these instructions in its entirety

This manual is intended to provide detailed technical specifications and explanations, to the basicuser as well as the more technically-minded person. This manual is a live document, and will beupdated often with new information. Please insure that you have the latest version, by checkingour website at: http://www.gsmcommander.com.

http://www.gsmcommander.com/

http://www.gsmcommander.com/



TABLE OF CONTENTS

Introduction..................................................................................3

How does it work?..........................................................................3

Application Areas................................................................................3

Dealing with multiple loads....................................................................4

Dealing with long cable runs...................................................................4

AC Power Fail Notification......................................................................5

Installation....................................................................................6

3-Phase Installation..............................................................................6

Single-Phase Installation........................................................................7

Connection to STAR-DELTA Motor.............................................................7

Calibration........................................................................................8

Technical Specifications...................................................................8

Guarantee.....................................................................................8

Important Notice (Disclaimer / Copyright).............................................9

Manufacturer Contact Details............................................................9

© Polygon Technologies. All rights reserved Page 2



1. INTRODUCTION

One of the biggest challenges in the fight against cable theft is the protection of cablesthat are not powered. One great example of this is in agricultural irrigation equipment,where a pump can often be at the end of a considerable cable run. When the pump is notrunning, the cable is often stolen, with expensive results.

The Polygon Technologies Cable Theft Monitor (CTM) module allows you to monitor“single-phase ” or “ 3-phase” cables, provides an alarm output to signal when anythinggoes wrong as well a power fail output to signal when the mains power fails. It can easilybe connected to our GSM Commander product (or any other device) to notify you remotelyof any event on the cable.

2. HOW DOES IT WORK?

The CTM will start monitoring and constantly inject a special DC signal into the cable whenno AC power is detected. It will then verify that the signal is reflected at the far end of the

cable. If the signal is not reflected, the CTM will detect this and activate the OpenCollector output. The output will remain activated for as long as the fault condition exists.

2.1. Application Areas

There are two main application areas:

A: DC loads (Motors, pumps and heater elements – as in picture above)B: AC loads (Street lighting, commercial, residential)

In the case of DC loads, the load itself reflects the signal. In the case of AC loads, onemust fit a DC-reflective device (see picture below) at the far end of the cable, which willallow the signal to be properly reflected back to the CTM.




2.2. Dealing with multiple loads

If there are multiple loads on a line, and they are some distance, a single CTM will beunable to monitor the cable running between the first and second loads. To monitor this“far side” cable, we fit a second CTM unit on this line, but after a power fail isolator*.

The isolator will disconnect the cable if there is a power failure, allowing the CTM units to

each operate on its own piece of cable and thus providing you with more specificinformation over where exactly the cable has been cut.

*a power fail isolator is basically a single phase or 3phase contactor whose coil is controlled by the the sameAC voltage that it is switching, such that if a power failure occurs the cable will be isolated into two parts.

2.3. Dealing with long cable runs

If there is a long cable run (more than a few kilometers), you would ideally want to knowwhere about the problem is. It is of no use to be informed that there was a problembetween point A and B if A and B are 50km apart. The solution is to add points X,Y and Z(or more) in-between points A and B.

At each point, there will be a isolator that disconnects the line if there is a power failure.This allows the piece of cable from A to B to be isolated into 4 separate lines, each of which can be monitored by a CTM device. The figure below illustrates this. At the end of each line, you will notice the DC reflector device, allowing each CTM to do its job.




2.4. AC Power Fail Notification

The CTM has a power fail notification output that will warn any connected equipment thatthe AC power across it's barrier terminals is no longer present. This Open Collector outputwill remain active for as long as there is no AC power present across it's barrier terminals.

This comes in handy for when you want to know when there is no AC power present so thatyou can immediately go and investigate before a cable cut occurs.




3. INSTALLATION

The CTM has the following terminals and connections:

3-Phase Live terminals – These are connected to the power cable you intend to monitor.In the case of a single phase system, you will only connect two of the terminals to yourline, and the third terminal will be shorted directly to any of the first two.

Alarm Output terminal – This is an optically isolated open collector output that will betriggered if a cable cut occurs.

Power Fail Output terminal – This is an optically isolated open collector output that willbe triggered if there is no AC power across it's barrier terminals.

Power Input terminal – Power is supplied to the CTM via this input. Power should bebetween 10-16V DC.

Please Note: The negative terminals(-) of ALRM and PFAIL are already grounded when theCTM is powered from the GSM Commander, so you need not connect it.

3.1. 3-Phase Installation

The CTM live terminals are connected to each cable as shown below. The alarm and powersignal contacts are connected to a GSM Commander device to trigger it's inputs, and of course you need to feed DC power to the CTM. Very simple!

CTM ↔ GSM COMMANDER PWR IN(+) ↔ INPUT(+)PWR IN(-) ↔ INPUT(-)ALRM(S) ↔ INPUT(-IN)PFAIL(S) ↔ INPUT(-IN)






3.4. Calibration

The CTM comes pre-configured with default parameters that will work in 99% of cases. Incases where the DC reflector device is used, it may be necessary to calibrate the CTMaccording to the current environment. A good example where this is necessary, is instreetlights, where the cable run has multiple distributed loads. The CTM has a buttonthat is used for calibration. To calibrate, make sure power to the load is off, and that the

DC reflector is connected and that everything is “normal”. Now press the “CAL” buttonmomentarily (the “ALRM” LED will come on while button is pressed). This will calibratethe CTM according to what it sees on the line.

To re-set the CTM to default values, simply keep the button pressed for 5 seconds, untilthe “ALRM” LED starts to flicker. The unit will now be set back to factory default.

4. TECHNICAL SPECIFICATIONS

Weight ~ 100gram

Dimensions 125,7 x 71,9 x 26mm

Voltage Range on Sense Inputs 0 – 600V AC

Input Voltage 10 – 16V DC

Output Signals Optically Isolated Open Collector

Current consumption ~ 50mA (Idle)

Operating Temperature -10°C to +60°C

Maximum no-fault impedance 20 – 30 Kohm

5. GUARANTEE

The Cable Theft Monitor is guaranteed for a period of 24 months against defects inmaterials or workmanship. Should your product become defective during the guaranteeperiod it will be repaired or replaced at the sole discretion of Polygon Technologies underthe following conditions:

A: No components must not have been tampered with or removed.

B: The guarantee does not cover damage resulting from excessive input voltages, lightning,power surges or water ingress.

A decision about issues A and B will be at the sole discretion of Polygon Technologies.This guarantee does not provide for shipping costs. This will be for the account of the userunder all circumstances.




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Cable Theft Commander Manual