Megger RCDT300 Series Bedienungsanleitung

RCDT300 Series

Residual Current Device testers

USER MANUAL

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 1

GSAFETY WARNINGS

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

■Continuity of protective conductors and earthed equipotential bonding of new or modified installations must be verified before carrying out RCD

tests.

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

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

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

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

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

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

■The battery cover must be in place whilst conducting tests.

■Voltage 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.

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 2

Preventive maintenance 15

Touch voltage enable/inhibit and Reverse polarity or

line/neutral swapping 16

General Specification 17

Basic and service errors 18

Accessories and equipment 18

Repair and Warranty 19

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

Un–packing the carton 5

LCD Display 6

Top panel 6

Lid open/closure 17

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 10

Test Leads 10

Test lead connection. 10

LED indicators 11

Residual Current Device [RCD] testing 11

RCD type selection 12

∆I RCD Non-tripping measurement 12

1xI & 5xI RCD trip time measurement 12

0 or 180° testing 12

RampTest 12

DC Sensitive RCD test [RCD] 13

Voltage measurement 13

Frequency Hz (RCDT320 only) 14

Replacing batteries and fuses 14

Low battery warning symbol 14

To replace batteries 14

Fuse Blown indication 15

N13117

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 3

Feature RCDT310 RCDT320

3 Phase safe ■■

Display backlight ■

Battery status indication ■■

Auto power down ■■

Fuse blown indication ■■

L-N-E polarity indicators ■■

Voltmeter ■■

Frequency measurement ■

Reverse polarity operation (can be disabled) ■■

∆I, I, 5I RCD trip time test ■■

Auto sequence test ■■

Fault voltage display (selectable) ■■

Max touch voltage selectable (25/50 V) ■■

Touch voltage display ■■

RCD trip current test (RAMP ■

0º/180º polarity selection ■■

Selective breakers ■■

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

The RCDT300 Series test instruments have

the following features:

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 4

Unpack the carton contents carefully. There are important documents

that you should keep for future reference.

Please complete the pre-paid 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 and RCDT320:

1 x RCDT300 series RCD tester

1 x 3 wire test lead with prods with clips

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

1 x Test lead case

1 x Warranty card

1 x Calibration certificate

1 x Owners CD manual

1 x Safety instructions

UNPACKING THE CARTON

Feature RCDT310 RCDT320

DC breakers (1/2 I, I, 5I) ■■

30, 100, 300, 500 mA RCDs ■■

10mA/1000mA RCD ■

Plug ended test lead ■■

2 wire test lead probe/croc clip ended ■

Calibration Certificate ■■

IEC61010-1 300V CATIII ■■

EN61557 ■■

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 5

LCD DISPLAY FRONT PANEL

Loop test type

indicator (tripping or

non-tripping test)

Fuse

Blown

Warning –

refer to

User manual Battery

status

Measurement

ranges

Measured results

Phase

rotation

Test

Lock

Supply connection indicators

L-PE, L-N, N-PE

Test lead

connections

RCD range

select:

10mA (RCDT320 only)

30mA

100mA

300mA

500mA

1000mA (RCDT320 only)

Neck strap

slots

Test selector:

∆x I RCD trip time

1 x I RCD trip time

5 x I RCD trip time

AUTO (RCDT320 only)

Ramp (RCDT320 only)

V - AC/DC volts RMS

Hz – Frequency

(RCDT320 only)

Front panel cover

(folded under

instrument)

Backlight On/Off

(LT320 only)

RCD type selector:

AC Selective

DC (RCDT320 only)

DC Selective -

(RCDT320 only)

Test

button

& Test

lead null

0º/180º

selector

LCD Display

Noise

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 6

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

Mains plug test lead

connector

Single or 3Phase

connection

Neutral or 2nd

phase connection

Warning:

Refer to User

Guide

Maximum 300 V

connection across

terminals

Maximum 300 V

Phase to earth

allowed

)

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 7

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.

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 and prevent further testing

until the instrument has had a chance to cool down.

Fuse Blown

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

Batteries

The Megger RCDT300 series instruments are supplied with batteries

fitted. When batteries become exhausted, refer to section 8, 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.

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 8

Backlight operation (LT 320 only)

The RCDT320 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.

LRange lock

Displayed at any time the [TEST] button is locked in the on position.

Battery condition indication. Refer to page 16.

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

Refer to page 16.

>280V Displayed on the RCDT310 indicates a supply voltage in excess

of the allowed is present.

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

loop testing

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 / 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).

6. Press the [LOCK] button or the PFC button to change the setting.

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

3. Now release the [TEST] button.

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

touch voltage. 9

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 9

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

circuit under test.

Application

This instrument may be connected live to earth or between live

conductors of systems that have a rated voltage of 600 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. To maintain user safety and ensure accurate measurements, only

use the test leads supplied by Megger Limited.

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 power cord supplied with the Megger testers is a test lead that forms

part of the measuring circuit of the instrument. The overall length of this

lead must not be altered. If the power cord plug is not suitable for your

type of socket outlets, do not use an adapter. You may change the plug

once only by cutting the cord as close to the plug as possible and fitting a

suitable plug.

The colour code of the cord is:

Earth (Ground) Yellow/Green

Neutral Blue

Phase (Line) Brown

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

with bare conductors is hazardous in a live socket outlet.

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.

RCDT300_UG_en_V01 07/05/2004 12:07 pm Page 10

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