Megger RCDT300 Series Bedienungsanleitung

RCDT300 Series

Residual Current Device testers

USER MANUAL

GSAFETY WARNINGS

nSafety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use.

nContinuity of protective conductors and earthed equipotential bonding of new or modified installations must be verified before carrying out RCD tests.

nDo not leave the instrument connected to the mains supply when not in use.

nCircuit connections and exposed metalwork of an installation or equipment under test must not be touched.

nEnsure that hands remain behind guards of probes/clips when testing.

nDo not move the rotary selector knob position while a test is in progress.

nThe instrument should not be used if any part of it is damaged.

nTest leads, probes and crocodile clips must be in good order, clean and with no broken or cracked insulation.

nThe batterycover must be in place whilst conducting tests.

nVoltage indicator LED’s cannot reveal a N-PE supply reversal.

Users of this equipment and/or their employers are reminded that Health and Safety Legislation requires them to carry out valid risk assessments of all

electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as inadvertent short circuits.

Some national safety authorities recommend fused leads for voltage measurement on high energy systems. If RCD or Loop tests are made it may cause the

fuse to rupture, and so they must be used with caution on voltage testing.

NOTE

THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS.

To replace batteries 17

Fuse blown indication 17

Preventive maintenance 19

Specification 19

Basic and service errors 20

Accessories and equipment 21

Repair and Warranty 22

Symbols used on the instrument are:

GCaution: refer to accompanying notes

tEquipment protected throughout by Double

Insulation (Class II)

cEquipment complies with current EU directives.

Equipment complies with ‘C tick’ requirements

CONTENTS

Safety warnings: 2

Introduction 4

General description 4

Case contents 5

LCD display 6

Top panel 6

Lid open/closure 7

Preparations for use 8

Batteries 8

Preliminary test lead check 8

General operating instructions 8

Display warning symbols 9

Setup procedure 9

Reverse polarity detection 9

Touch voltage 9

Test leads 10

Test lead connection. 10

LED indicators 11

Residual current device [RCD] testing 11

RCD type selection 12

1/2I RCD non-tripping measurement 12

1xI & 5xI RCD trip time measurement 12

0 or 180° testing 13

RampTest [RCDT320 and RCDT330 only] 13

DC sensitive RCD test 13

Auto RCD test (RCD320 and RCDT330 only) 13

Voltage measurement 14

Touch voltage 14

Frequency Hz (RCDT320 and RCDT330 only) 16

Replacing batteries and fuses 17

Low battery warning symbol 17

N1311

Feature RCDT310 RCDT320 RCDT330

3Phase safe nn n

Display backlight nn

Battery status indication nn n

Auto power down nn n

Fuse blown indication nn n

L-N-E polarity indicators nnn

Voltmeter n n n

Frequency measurement nn

Reverse polarity operation *

(can be disabled) nn n

1/2I, I, 5I RCD trip time test nn n

Auto sequence test nn

Max touch voltage selectable (25/50 V) nn n

RCD trip current test (RAMP) nn

0º/180º polarity selection nn n

Selective breakers nnn

*Not available on UK versions

INTRODUCTION GENERAL DESCRIPTION

Thank you for purchasing the Megger RCD Tester.

For your own safety and to get the maximum benefit from your

instrument, please ensure that you read and understand the following

safety warnings and instructions before attempting to use the instruments.

This user manual describes the operation and functions of the following

RCDT300 series of RCD testers:

RCDT310

RCDT320

RCDT330

The RCDT300 Series test instruments have

the following features:

Please complete the warranty card and return it to Megger Limited as soon

as possible to help us reduce any delays in supporting you should the

need arise.

Carton contents RCDT310, RCDT320 and RCDT330:

1xRCDT300 series RCD tester

1x2wire test lead with prods with clips (RCDT320, RCDT330 only)

8 x AA (LR6) batteries (fitted in instrument)

1 x Warranty card

1 x Calibration certificate

1xCD containing user manual

1xSafety instructions

1 x USB download lead (RCDDT330 only)

1 x Download manager CD (RCDT330 only)

1 x Printed quick startguide

1 x Mains plug test lead

CASE CONTENTS

Feature RCDT310 RCDT320 RCDT330

DC breakers (1/2 I, I, 5I) nnn

Programmable breakers n

30, 100, 300, 500 mA RCDs nn n

10 mA/1000 mA RCD nn

Plug ended test lead nn n

2wire test lead probe/croc clip ended nn

Calibration certificate nnn

IEC61010-1 300V CATIII n n n

EN61557 nn n

Results storage n

Downloading n

USB n

LCD DISPLAY FRONT PANEL

Refer to user

manual

Test lead

connections

Front panel

cover (folded

under cover)

Backlight

On/Off

(320/330)

RCD type

selector:

AC selective

DC selective

Test button

0º/180º

selector

Neck strap

slots

Supply connection

indicators

L-PE, L-N, N-PE

LCD display

RCD range select:

10 mA (320/330)

30 mA

100 mA

300 mA

500 mA

1000 mA (320/330)

Prog (330 only)

Test selector:

1/2 xI RCD trip time

1xI RCD trip time

5xI RCD trip time

AUTO (320/33)

Ramp (320/330)

V - AC RMS

Hz - Frequency

(320/330)

RCL, SND, DEL (330

only)

Mains noise

Battery

status

Ranges

Measured results

Touch voltage

bargraph

display

RCD test type

indicator

Fuse blown

Memory control keys:

STORE:.................... Store initiates the storing of a test result.

LAST/NEXT:............ Selects the type of location; ie Job,

distribution board, circuit, phase etc.

ESC:.........................Aborts a save at any time.

OK:.......................... Final operation to save the result.

sSelects the job, db, circuit number; ie

t01,02,03 etc

Lid open/closure

1. Open lid by lifting up front panel tab (1).

2. Fold-away underneath instrument (2 & 3) and push into retaining slot

(4).

Connection Panel

RCDT300 Series test lead connections

Additional RCDT330 Controls

Phase connection Earth connection

USB

connection

Max. 300 V

Phase to earth

Mains plug

test lead

connector

Max. 300 V

Phase to

earth

Warning!

Read user manual

PREPARATIONS FOR USE (ALL INSTRUMENTS) GENERAL OPERATING INSTRUCTIONS

Test inhibit

The following condition may cause the instrument to inhibit testing:

Out of range supply voltage

If an out of range voltage or frequency exists on the circuit under test,

or on a very noisy mains supply, testing will be automatically inhibited.

The RCD tests requires a minimum supply voltage to operate.

If the warning <***V is displayed, the supply voltage is below that

required to perform an RCD test.

*** = supply voltage indication.

Overheating

Repetitive RCD Ramp testing and some high current RCD trip testing

generates heat within the instrument. If this heat becomes excessive

the instrument will warn the operator by displaying the hot symbol,

and prevent further testing until the instrument has had a chance to

cool down.

Fuse Blown

Afuse blown will prevent the instrument from making further tests.

The fuse indicator will be displayed.

Default voltmeter

The default voltmeter automatically operates in all test modes, indicating

connection to a live system.

Auto power-down

To extend battery life the instrument will automatically switch off six

minutes after the last operation.

It can be switched off manually by selecting [OFF] with the rotary switch,

Batteries

The Megger RCDT300 series instruments are supplied with batteries fitted.

When batteries become exhausted, refer to page 17, battery replacement.

Warning: Do not switch the instrument on with the battery cover

removed.

Preliminary test lead check

Functional verification

Before each use of the instrument, visually inspect the test leads, prods

and crocodile clips to confirm that their condition is good, with no

damaged or broken insulation.

or switched back on again by pressing the [TEST] button.

Backlight operation (RCDT320 and RCDT330 only)

The RCDT320 and RCDT330 LCD display may be backlit. The backlight

function can be selected at any time while the instrument is switched on by

pressing the BACKLIGHT Jbutton.

The backlight function will switch off automatically 15 seconds after the

instrument has finished testing.

Display warning symbols

GRefer to user manual.

Any time the warning triangle is displayed the operator should refer to the

user manual for further information.

Battery condition indication. Refer to page 17.

fFuse blown indicator, appears when an instrument fuse has failed.

Refer to page 16.

>280V Indicates a supply voltage in excess of the allowed is present.

<50 V* Supply voltage too low/missing

hot Indicates the instrument needs to cool down before it can continue

RCD testing

*May vary depending on RCD test and instrument type.

Setup procedure

Note: Line reversal and RCD touch voltage configuration features are only

available on the instruments as per the relevant tables in the specification

section of this document.

Reverse polarity detection (not available on the UK version)

/Touch voltage setting

To select Polarity reversal acceptance or rejection:

1. With the instrument switched OFF, hold down the [TEST] button and

turn the range knob to any ON position.

2. Keep the button held down until the instrument displays the ‘SET’

warning.

3. Now release the [TEST] button.

4. Press the [TEST] button again to view the current setting for

line/neutral swapping.

5. The display shows ‘L+L’ (instrument will perform tests with L & N

swapped) or ‘L+N’ (instrument will not perform tests with L & N

swapped).

NOTE: LED’s will illuminate to indicate:-

L-PE ON = No reverse polarity

L-PE & N-PE ON = Reverse polarity allowed.

6. Press the [0/180º] button to change the setting.

7. Press the [TEST] button to go to the next item in the setup menu.

RCD touch voltage selection

To set the touch voltage inhibit limit:

1. With the instrument switched OFF, hold down the [TEST] button and

turn the range knob to any ON position.

2. Keep the button held down until the instrument displays the ‘SET’

warning.

Test lead connection

The supplied test leads should be connected to the appropriate sockets on

the rear of the instrument marked L0 and L1, or to the 3 way test socket.

Standard test probes and crocodile clips are supplied for connection to the

circuit under test with the RCDT320 only.

Application

This instrument may be connected live to earth or between live conductors

of systems that have a rated voltage of 300 V a.c. rms to earth and an

installation (overvoltage) Category III or lower.

This means that the instrument may be connected to any fixed wiring of a

building installation, but not to primary supply circuits such as overhead

cables. Tomaintain user safety and ensure accurate measurements, only use

the test leads supplied by Megger.

System diagram - Whereto use each test

3. Now release the [TEST] button.

4. Press the [TEST] button twice to view the current settings for the touch

voltage.

The display shows the fault voltage limit, ‘25 V’ or ‘50 V’.

If the fault-voltage display is active, a bar-graph display will also appear.

5. Press the [0º/180º] button to change the limit setting from 25V to 50V

and back.

6. Press the [TYPE] button to turn bar-graph display ON or OFF.

7. Press the [TEST] button to exit from the set-up menu.

Test leads

All test leads form part of the measuring circuit of the instrument and must

not be modified or changed in any way, or be used with any other electrical

instrument or appliance.

The colour code of the cord is:

Earth (Ground) Yellow/Green

Neutral Blue

Phase (Line) Brown

NOTE: Aplug severed from the power cord must be destroyed, as a plug

with bare conductors is hazardous in a live socket outlet.

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