Thorne & Derrick VR2250 Manual de usuario

VR2250

Instruction Manual

CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATS

FEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS

11KV 33KV CABLE JOINTS & CABLE TERMINATIONS

FURSE EARTHING

www.cablejoints.co.uk

Thorne and Derrick UK

Tel 0044 191 490 1547 Fax 0044 191 477 5371

Tel 0044 117 977 4647 Fax 0044 117 9775582

_____________________________________________________________MARVR2250

TABLE OF CONTENTS

1. SAFETY PRECAUTIONS AND PROCEDURES.......................................................................................... 4

1.1. Forward.................................................................................................................................................................... 4

1.2. Preliminary InstructionS........................................................................................................................................... 4

1.3. During Use............................................................................................................................................................... 5

1.4. After Use.................................................................................................................................................................. 5

2. GENERAL DESCRIPTION........................................................................................................................... 6

2.1. Introduction .............................................................................................................................................................. 6

2.2. Functions ................................................................................................................................................................. 6

3. PREPARATION FOR USE ........................................................................................................................... 7

3.1. Inspection ................................................................................................................................................................ 7

3.2. Power Supply........................................................................................................................................................... 7

3.3. Calibration................................................................................................................................................................ 8

3.4. Storage .................................................................................................................................................................... 8

4. INSTRUMENT DESCRIPTION ..................................................................................................................... 9

4.1. Display Description ................................................................................................................................................ 10

4.2. Initial Screen .......................................................................................................................................................... 10

4.3. Backlight function................................................................................................................................................... 10

5. INITIAL SETTINGS......................................................................................................................................11

5.1. How to Adjust the Contrast .................................................................................................................................... 11

5.2. How to Set Date and Time..................................................................................................................................... 11

5.3. How to Set the Language ...................................................................................................................................... 11

5.4. RESET................................................................................................................................................................... 12

6. SAFETY TEST FUNCTIONS.......................................................................................................................13

6.1. LOWΩ: Continuity Test with 200mA Test Current................................................................................................. 13

6.1.1. Calibrating the test leads ("CAL" Mode) ..........................................................................................................................14

6.1.2. Measurement Procedure .................................................................................................................................................16

6.1.3. Results of "AUTO" mode .................................................................................................................................................16

6.1.4. Results of "RT+" and "RT-" modes ..................................................................................................................................17

6.1.5. "AUTO", RT+", "RT-" faulty cases....................................................................................................................................17

6.2. MΩ: Insulation resistance Measurement with 50V, 100V, 250V, 500V, 1000V Test Voltage...................................... 19

6.2.1. Measurement Procedure .................................................................................................................................................19

6.2.2. Results of "MAN" mode ...................................................................................................................................................21

6.2.3. Results of "TMR" mode....................................................................................................................................................22

6.2.4. "MAN" and "TIMER" mode faulty cases...........................................................................................................................23

6.3. RCD: Test on "A" and "AC" Type RCDs ............................................................................................................... 24

6.3.1. Tripping times for the general and selective RCDs..........................................................................................................26

6.3.2. Measurement procedure..................................................................................................................................................27

6.3.3. RCD Faulty cases............................................................................................................................................................32

6.4. LOOP : Measurement of Line Impedance, Fault loop Impedance, Prospective Short Circuit Current Calculation

and Phase Sequence Indicator.............................................................................................................................. 37

6.4.1. Measurement procedure and results of "P-N" mode .......................................................................................................38

6.4.2. Measurement procedure and results of "P-P" mode........................................................................................................39

6.4.3. Measurement procedure and results of "P-PE" mode .....................................................................................................40

6.4.4. Measurement procedure and results of " RA" mode ...................................................................................................42

6.4.5. Measurement procedure and results of " " mode .......................................................................................................43

6.4.6. LOOP Faulty Cases ..................................................................................................................................................44

6.5. EARTH: Soil Resistance and Resistivity Measurements ....................................................................................... 49

6.5.1. Measurement procedure and results of "2-W"and "3-W" mode.......................................................................................50

6.5.2. Measurement procedure and results of "ρ" mode ...........................................................................................................51

6.5.3. "2-W", "3-W" and "ρ" faulty cases....................................................................................................................................52

6.6. LEAKAGE CURRENT: REAL TIME MEASUREMENT..........................................................................................55

6.7. LEAKAGE CURRENT: RECORDING.................................................................................................................... 57

6.7.1. AUX Basic setting: RECORDER CONFIG.......................................................................................................................57

6.7.2. RECORDING: setting of Typical Configurations..............................................................................................................59

7. ANALYZER .................................................................................................................................................60

_____________________________________________________________MARVR2250

7.1. Basic Setting: ANALYZER CONFIG ...................................................................................................................... 61

7.1.1. Type of electrical system under test ................................................................................................................................61

7.1.2. How to set the fundamental frequency ............................................................................................................................61

7.1.3. How to set the current range ...........................................................................................................................................61

7.1.4. Clamp Type .....................................................................................................................................................................61

7.1.5. How to set the value of the transformer voltage ratio (TV RATIO) ..................................................................................61

7.1.6. How to enable/disable the password ...............................................................................................................................62

7.2. Basic Setting: RECORDER CONFIG .................................................................................................................... 63

7.3. ANALYZER FUNCTIONS ...................................................................................................................................... 70

7.4. "VOLTAGE" Function............................................................................................................................................. 70

7.4.1. Symbols ...........................................................................................................................................................................70

7.4.2. "METER" mode................................................................................................................................................................71

7.4.3. "HARM" mode..................................................................................................................................................................72

7.4.4. "WAVE" mode..................................................................................................................................................................73

7.5. "CURRENT" Function ............................................................................................................................................ 74

7.5.1. Symbols ...........................................................................................................................................................................74

7.5.2. “METER" mode................................................................................................................................................................75

7.5.3. “HARM" mode..................................................................................................................................................................76

7.5.4. "WAVE" mode..................................................................................................................................................................77

7.6. "POWER" Function................................................................................................................................................ 78

7.6.1. Symbols ...........................................................................................................................................................................78

7.6.2. "METER" mode................................................................................................................................................................79

7.6.3. "WAVE" mode..................................................................................................................................................................80

7.7. "ENERGY" Function .............................................................................................................................................. 81

7.7.1. Symbols ...........................................................................................................................................................................81

7.7.2. "METER" mode................................................................................................................................................................82

7.8. Measuring Procedures........................................................................................................................................... 83

7.8.1. Using the Instrument in a Single Phase System..............................................................................................................83

7.8.2. Using the Instrument in a Three Phase System ..............................................................................................................84

8. SAVING RESULTS......................................................................................................................................85

8.1. Saving Safety Test Results.................................................................................................................................... 85

8.2. Saving Displayed Values of ANALYZER Function................................................................................................. 85

9. RECORDINGS.............................................................................................................................................86

9.1. Start a Recording................................................................................................................................................... 86

9.2. Setting Typical Configurations ............................................................................................................................... 87

9.2.1. Default Configuration .......................................................................................................................................................87

9.2.2. Typical Configurations .....................................................................................................................................................88

9.3. During a Recording................................................................................................................................................ 92

9.3.1. MENU key........................................................................................................................................................................92

9.3.2. Rotary Switch during a recording.....................................................................................................................................93

9.4. Stopping a Recording or an Energy Measurement................................................................................................ 93

10.INSTRUMENT MEMORY ............................................................................................................................94

10.1. SAFETY TEST MEMORY...................................................................................................................................... 94

10.2. ANALYZER MEMORY........................................................................................................................................... 95

11.CONNECTING THE INSTRUMENT TO A PC.............................................................................................96

12.MAINTENANCE ..........................................................................................................................................97

12.1. General InstructionS .............................................................................................................................................. 97

12.2. Battery Replacement ............................................................................................................................................. 97

12.3. Instrument Cleaning............................................................................................................................................... 97

12.4. End of life............................................................................................................................................................... 97

13.TECHNICAL SPECIFICATIONS .................................................................................................................98

13.1. Technical Features ................................................................................................................................................ 98

13.1.1. ANALYZER and AUX functions .....................................................................................................................................100

13.2. Standards ............................................................................................................................................................ 101

13.2.1. General ..........................................................................................................................................................................101

13.2.2. Safety Test.....................................................................................................................................................................101

13.2.3. ANALYZER....................................................................................................................................................................101

13.3. General Specifications......................................................................................................................................... 102

13.3.1. Mechanical Data ............................................................................................................................................................102

13.3.2. Power supply .................................................................................................................................................................102

_____________________________________________________________MARVR2250

13.3.3. Display ...........................................................................................................................................................................102

13.3.4. Memory..........................................................................................................................................................................102

13.4. ENVIRONMENT .................................................................................................................................................. 102

13.5. ACCESSORIES................................................................................................................................................... 103

14.SERVICE ...................................................................................................................................................104

14.1. WARRANTY ........................................................................................................................................................ 104

. 104

14.2. SERVICE ............................................................................................................................................................. 104

15.APPENDIX 1 – MESSAGES DISPLAYED ................................................................................................105

16.APPENDIX 2 – RECORDABLE PARAMETERS: SYMBOLS...................................................................106

_____________________________________________________________MARVR2250

1. SAFETY PRECAUTIONS AND PROCEDURES

1.1. FORWARD

This instrument conforms with safety standards EN61557 and EN 61010-1 relating to

electronic measuring instruments.

WARNING

For your own safety as well as that of the apparatus you are recommended to

follow the procedures described in this instruction manual and carefully read all

the notes preceded by the symbol .

Strictly adhere to the following instructions before and during measurements:

Do not take measurements in wet environments or dusty places.

Do not take measurements in environments with explosive gas or fuels.

Do not touch the wiring under test whilst taking measurements

Avoid any contact with exposed metal parts, ends of test leads not in use, circuits, etc.

Do not perform any measurement if the instrument is damaged, e.g, cracked case,

leaking batteries, absence of display reading etc.

Do not use the external power supply adapter (code MARVR2250PSU) if you notice

deformation, or damage to the case, wire or to the plugs.

Pay careful attention when measuring voltages exceeding 25V in places SUCH AS

building yards, swimming pools, etc. and 50V elsewhere, because of the risk of electric

shock.

Use only cables and accessories approved by Martindale Electric.

The following symbols are used in this manual:

Caution: refer to the instructions in this manual, improper use may damage the

apparatus or its components.

AC Voltage or Current.

Unidirectional pulsating Voltage or Current.

Rotary switch of the instrument.

1.2. PRELIMINARY INSTRUCTIONS

This instrument has been designed for use in environments with a pollution level 2 and

up to (and no more than) 2000 meters altitude.

It can be used for Safety Test on Installation with Over voltage Category III 300V~

(phase to earth) and for voltage and current measurements on installations with over

voltage category III 600 V~ phase to phase / 300 V~ phase to earth or CATII 350 V

phase to earth.

_____________________________________________________________MARVR2250

Please keep to the usual safety standards aimed at:

♦Protecting against dangerous currents;

♦Protecting the instrument against improper use.

Only the accessories supplied with the instrument guarantee compliance with the

safety standards. Accordingly, they must be in good condition and, if necessary, they

must be replaced with identical models.

Do not take measurements on circuits exceeding the specified current and voltage

limits.

Before connecting cables, croc clips and clamps to the circuit under test, make sure

that the correct function has been selected.

Do not take any measurements under environmental conditions beyond the limits

specified in paragraph 13.4.

Check that batteries are not weak and have been inserted correctly.

Before connecting test leads to the circuit under test, check that rotary switch position

is correct.

Check that the LCD and the rotary switch indicate the same function.

1.3. DURING USE

Please read carefully the following recommendations and instructions:

WARNING

Non compliance with the warnings and / or instructions may damage the

apparatus and / or its components, or injure the operator.

Before selecting any function, disconnect the test leads from the circuit under test.

When the instrument is connected to the circuit under test do not touch any unused test

leads.

Avoid taking resistance measurements in the presence of external voltages, even

though the instrument is protected, too high a voltage may cause malfunctions.

When measuring current, other currents near the test leads may affect the measuring

accuracy.

When measuring current, always position the wire in the middle of the current clamp

jaws in order to obtain the highest accuracy.

A measured value remains constant if the "HOLD" function is active. Should you notice

that the measured value remains unchanged, disable the “HOLD” function.

WARNING

The symbol " " shows the battery status: When it is completely black the

batteries are fully charged, while the " " symbol indicates weak batteries.

When the batteries are too low to execute the test the instrument will show a

warning message. In this case interrupt testing and replace batteries following

the procedure described under paragraph 12.2. The instrument is capable of

keeping the data stored even though batteries are not installed. The

Instrument Date and Time settings are not lost if you change the batteries

within 24 hours.

1.4. AFTER USE

•After use, turn off the instrument by pressing ON/OFF for a few seconds.

•Remove batteries when the apparatus remains unused for long periods. Please follow

the storage instructions described at paragraph 13.4.

_____________________________________________________________MARVR2250

2. GENERAL DESCRIPTION

2.1. INTRODUCTION

The instrument you have just purchased will grant you accurate and reliable

measurements provided that it is used according to these instructions.

The instrument was designed to grant the user the highest level of safety thanks to an

innovative design assuring double insulation and over voltage category III.

2.2. FUNCTIONS

The instrument is able to perform the following tests:

LOWΩ: Continuity Test of Earth, Protective and Equalising conductors with test

current higher than 200mA and open circuit voltage ranging from 4V to 24V.

MΩ: Measurement of insulation resistance with DC test voltage 50V, 100V,

250V, 500V or 1000V.

RCD: Measurement on general and/or selective RCD’s AC type ( ) and A

type ( ) of the following parameters:

Tripping time.

Tripping current.

Contact voltage (Ut).

Overall earth resistance (Ra).

In this mode the instrument can measure the overall earth resistance

without causing RCD tripping.

LOOP : Measurement of line and fault loop impedance with calculation of

prospective short circuit current,

Measurement of fault loop impedance between phase and earth and

Global Earth resistance measurement without RCD tripping

Calculation of prospective short circuit current, indication of phase

rotation sequence

EARTH Measurement of Earth Resistance and Resistivity using earth rods.

AUX: For future use

ANALYZER: The instrument allows the following operations:

Display in real time the electrical parameters of single phase systems

and the harmonic analysis of voltage and current.

Conduct a direct Energy measurement (without memorising).

Memorise (pressing SAVE key) the sampled values of the parameters

present at instrument input generating an "Smp" record in instrument

memory. It will be possible to analyse the memorised data ONLY

by transferring the data to a PC.

Record simultaneously (pressing the START key after setting

parameters): RMS values of voltage, current, corresponding

harmonics, active, reactive and apparent powers, power factors and

cosϕ, active, reactive and apparent energies, voltage anomalies

(voltage sag and surge) with 10ms resolution. It will be possible to

analyse the recorded data ONLY by transferring the data to a PC.

WARNING

Please note the difference between memorise and record. These terms

will be used repeatedly in this manual. Please focus on their definitions and

distinctions.

_____________________________________________________________MARVR2250

3. PREPARATION FOR USE

3.1. INSPECTION

This instrument has been checked mechanically and electrically prior to shipment.

Every care has been taken to ensure that the instrument reaches you in perfect condition.

You are recommended, however, to check for any possible damage which might have

been caused during transport. Should this be the case, immediately contact the distributor.

Check that the packaging contains all the parts listed under paragraph 13.5. In case of

discrepancies contact the distributor.

In the unlikely event that you have to send the instrument back, please follow the

instructions detailed in section 14.

3.2. POWER SUPPLY

The instrument can be powered by:

6 batteries 1.5V AA - LR6 series located in the compartment on the back of the

instrument (not included in the package). For battery life see paragraph 13.3.1

An external power supply adapter (code MARVR2250PSU) to be used only for

ANALYSIS and AUX function. It is recommended that the MARVR2250PSU

Power Supply adapter is used for long-term measuring.

WARNING

For your own safety it is not permitted to use the external power supply

adapter during Safety Test (LOWΩ, MΩ, RCD, LOOP, EARTH rotary

switch positions). If you press the START button the Instrument will show

the message " REMOVE POWER".

The symbol shows the battery status: If it is completely "black" the batteries are fully

charged, while the symbol indicates weak batteries. When the batteries are too low

to execute the test the instrument will show a warning message.

In this case interrupt testing and replace batteries following the procedure described under

paragraph 12.2.

The instrument is capable of keeping the data stored even though batteries are not

installed. The instrument Date and Time settings are not lost if you change the batteries

within 24 hours.

_____________________________________________________________MARVR2250

WARNING

For recordings (ANALYSIS and AUX function) it is recommended to

ALWAYS use the external power supply adapter (code MARVR2250PSU),

although the instrument does allow the operator to perform a recording

using internal batteries. If during a recording the external power supply

adapter is de-energised, the instrument will continue the recording using the

internal battery power until the batteries are exhausted (the data stored up

to the point the instrument shuts down will be saved). It is recommended to

ALWAYS insert a new set of batteries before a long recording.

The instrument uses sophisticated algorithms to prolong the battery life. Particularly:

The instrument switches OFF the backlight automatically after 5 seconds.

If the instrument is displaying in real time (and the external power supply adapter is not

connected), after about 5 minutes from the last key press or switch rotation the

instrument turns off automatically ("AUTOPOWER OFF" feature).

If the instrument is recording or is measuring energy (and the external power supply is

not connected), after about 5 minutes from the last key pressure or switch rotation the

instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the

instrument keeps recording but the display is turned off.

3.3. CALIBRATION

The instrument fulfils the technical specifications listed in this manual. The performance of

the specifications is guaranteed for one year.

Annual calibration is recommended.

Please call 01923 441717 for details.

3.4. STORAGE

In order to ensure the accuracy of the measurements, after a period of storage in extreme

environmental conditions, wait until the apparatus is back to normal measuring conditions

(see environmental specifications listed in paragraph 13.4).

_____________________________________________________________MARVR2250

4. INSTRUMENT DESCRIPTION

SAV E

F1 F3 F4

HOLD

EN TER

MENU ESC

START

STO P

LEGEND:

1. Display

2. Function Keys

3. Rotary switch

Multifunction Keys.

ON/OFF and backlight key. Press for a few seconds to switch ON the

instrument, press it briefly to activate the backlight function.

This key is used to start and stop the measurement.

This key allows you to save the result displayed.

This key has a double function. It is the confirmation key for the

configuration menu and it allows you to freeze the displayed results using

the ANALYZER function.

This key opens the General Configuration Menu.

This key allows you to quit the configuration menu or the selected

working mode.

START

STOP

HOLD

ENTER

F2 F4F3

ON/OFF

SAVE

ESC

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