name der präsentation! - intellisoft lebanon 10_eng_customer.pdf6 mfm 10 data • test voltage up...

MFM 10

The new MFM 10

2

Good parts were improved.

New technologies were integrated

Unnecessary was left

Modern, comfortable, powerful

Future ready….

The new face of the MFM 10

MFM 10 Jan 2011, (c) SebaKMT 2011, all rights reserved

MFM 10 – Sheath fault location made easy

MFM 10 - 2011, (c) SebaKMT 2011, all rights reserved 3

The new MFM 10 is a significant improvement of all previously

existing ways of sheath fault location

This covers specially:

- the operation

- the technical parameters

- the handling

- the optic

- the functions

- the reliability

- the operational speed

The Operation


• Easy, menu guided operation

• Easiest operation, especially for users that are annoyed by a

complicated handling of a sheath fault location, will feel the improvement

• For prelocation the MFM 10 checks for wrong connections and informs

the operator accordingly.

• EasyGo rotary knob supplemented by a touch screen

The technical data


Functions: Testing, prelocation and pinpointing,

burning, direct resistance measurement,

voltage and current limiter,

quick event/ transient recognition

Display: 5.7’’ 320 x 240; LCD,LED backlight

User interface: Rotary encoder and touch screen

Output voltage: 0 … 10 kV DC, bipolar

Output current: 750 mA@0,4 kV, 60 mA@5 kV, 30 mA@10 kV

Pinpointing: 0 … 10 kV DC pulsed

Accuracy: ± 0.1%

Cable sections: 50

Protocolling: Easyprot via USB Stick

Mains supply: 88 … 264 V, 50 … 60 Hz, 800 VA

Battery: NIMH, 340 Wh, for all operations

DC supply: 12 V … 24 V DC / charge only

Discharge capacity: Max. 10 μF

Op. conditions: -25 °C … +55 °C, 93% rel. hum.

Dimensions: 500 x 457 x 305 mm

IP rating: IP 54, with lid closed

Weight: 20 kg

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MFM 10 Data

• Test voltage up to 10kV DC (bipolar!)

• up to 750mA continuous current driving capability (depending on

output voltage (30mA at 10kV) within certain limits useful as

burn unit!

• Definition / adjustement of rising ramp of DC voltage

• Flicker as well as ignitions of faults during testing are recognized

and displayed

• Wide range mains supply 88 to 264 V

• Fault locating using the well known voltage drop

methodimproved accuracy due to low-noise preamplifier

• Logging is done by Easyprot

• Flexible pin-pointing by A-Frame with 4.8 Hz (future Option)

MFM 10 - 2011, (c) SebaKMT 2011, all rights reserved

The Handling


• Easy, menu guided operation with rotary encoder and touch screen

• Weight reduction of more than 30% compared to the MFM 5-1 by new

technologies

• Only one single HV connection cable, the permits testing, prelocation and

pinpointing without reconnecting

• The test of all connected test leady avoids false measurements and

accelerates the the complete procedure

• The monitoring during the test, especially during the voltage ramp up phase

detects short time voltage or current changes, which might indicate a fault and

displays these after the test to the operator. By this way, also multiple faults

can be detected without a permanent observation of the display..

• Pelicase with Trolley for easiest transportability

Optical appearance


• Less is more

• Clear front end with few operating elelmentsn

• Also in the new MFM 10 the easygo priciple with jogdial and according

optical feedback of the jogdial motion is realised

• Intuitive easiest operation with a large display

• Less connection cables

• Solid Pelicase

The functions


• Testing with positive and negative voltage up to 10 kV

• Prelocation with the approved voltage drop method with bipolar test

voltage for the elimination of thermoelectric and galvanic effects

• Pinpointing with adjustable pulsed step voltage

• Burning of faults with up to 750 mA

• Protocolling of the measurements by the the Easyprot Software on

USB Stick

• Integrated discharge facilities

The reliability


The new MFM 10 offers more reliability by:

• Detection of fast events like flicker as well as ignitions of faults during

testing

• Significant increase of the bipolar prelocation

• Detection of the correct connection of the test leads

• The cabability to measure also very high and low resistive faults

• The protocolling

• The removable connection cable. Better handling and easier replacement

if the cable is damaged

• Significant improvement in the near and far range. The previous known

limitations in the areas are not existent anymore.

The operational speed


• A complete perlocation is just 15 seconds

• Easiest operationg

• Only one HV connection cable

• Battery operation for at least 2 hours

All of these features permit a very fast

test and measurement

Sales Conference Jan 2010, (c) SebaKMT 2010, all rights reserved 12

Why bipolar? Reasoning

• Differences of temperature inside a conductor cause thermoelectric effects that

can be recognized as polarized offset voltage. This offset voltage can influence

the measurement voltage so that the results can be distorted.

• Galvanic effects are a result of chemical elements inside the soil (e.g. ores or

metal-salts). They can affect the measurement results in the combination with

metallic earth spikes, moisture of soil and measuring current.

• Corrosion at the sheath fault itself or other parts of the conductor, for example

wet joints, can also lead to distorted results due to galvanic effects.

By using a bipolar measuring voltage the appearing offset

voltages can be detected and eliminated easily during the

measurement and the falsifying effects can be eliminated.


Voltage drop method

• Much less error-sensitiv compared to bridge-based methods, resulting in

significantly higher accuracy of the prelocation results.

• Independent from the resistances of supplementary wires

• Independent from the differences in sheath and core conductor resistance no

need for tedious manual (!) corrections as required for Shirla

• Independence from the contact resistance of the connection points

• Fast measurements – no moving parts only one connection cable

• Competitor arguments against the voltage drop method are based on outdated

assumptions (e.g. moving coil instrument 60mV full scale, class 1.5) MFM 10

brings A/D converters with 16bit (153µV) resolution in combination with low noise

pre-amp, leading to 0.1% overall accuracy.

MFM 10 Jan 2011, (c) SebaKMT 2011, all rights reserved 14

The final Appearance


DataGeneral

Output voltage ± 0 … 10 kV DC, bipolar test and measurement

Output current 750 mA@0,4 kV, 60 mA@5 kV, 30 mA@10 kV

Display 5,7’’ 320 x 240; Graphics LCD; LED illumination

User interface Easy-Go rotary knob/pushbutton and touch screen

Mains supply 88 … 264 V AC, 50 … 60 Hz, < 800 VA

Integrated battery NIMH, ca. 150 Wh, battery operation for all applications

External DC supply 12 V ... 24 V DC for battery charging and non HV-operation

Operating conditions -25°C … +55°C; 93% rel. humidity (30°C, non condensing)

Dimensions 500 x 457 x 305 mm

Protection rating IP54 (with closed lid)

Weight incl. Acc. ~ 20 kg

Sheath testing

Resistance Yes

Transient / intermittent fault detection Yes

Burning Yes

Voltage and current limitation Yes

Test protocol Yes, EasyProt via USB

Prelocation

Measuring technique voltage drop method (incl. direct resistance measurement)

Accuracy ± 0,1% ; 16 bit resolution, at least 153 µV / bit

Measuring sequenceAutomatic measuring sequence without the need for bridge

adjustment;

Definable cable sections 50 sections

Pinpointing

0 - 10kV DC pulsed adjustable duty cycle

4,8Hz for use with A-Frames

Adjustable current limit Yes

Integrated discharging unit

Max. capacity of test object 10 µF

Output voltage


Working with the MFM 10

The following pages provide a small overview of the operation

and the features of the MFM 10

The shown Screenshot are not final, but are in a permanent

improvement process, which will also implement the feedback

of the coming field trials

17

Operation MFM 10


18

Voltage dips

Possible sheath faults

With different ignition

Voltages

Repair Fault 1

→ then

Repair Fault 2

Testing –Rampe up function


19

Vorortung Spannungsabfallmethode


20

Elimination of

thermoelectrical and

galvanical effects

By the bi-polar voltage.

Two measurements

with positive and

negative voltage

Prelocation with voltage drop method


21

Pinpointing with step voltage method


23

Burning – Test protocol - MFM 10


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Application paper for „Sheath faults“

For the complete product lauch, we

made a new complete application paper

for the topic of sheath testing and sheath

fault location

This paper is as well intended to

demonstrate our advantages with the

competition in an neutral way.

Like all of these application papers,

this publication will also be available

on our website for downloading!

MFM 10 Jan 2011, (c) SebaKMT 2011, all rights reserved


The MFM 10 was delevoped with support of

the German Government


Mehr Infos unter www.sebakmt.com /

For more information please have a look on

www.sebakmt.com

name der präsentation! - intellisoft lebanon 10_eng_customer.pdf6 mfm 10 data • test voltage up...

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