Megger PAT320 Operating Manual

PAT300 Series

Portable Appliance Testers

User Manual

Thank you for purchasing the Megger portable appliance tester.

For your own safety and to get the maximum benefit from your instrument, please ensure that you read and understand the safety warnings and instructions before attempting to use the instrument.

These instruments are designed and manufactured by:

Megger Limited Archcliffe Road Dover Kent CT17 9EN England

Megger Limited reserves the right to change the specification of these instruments at any time without prior notice.

1. Contents

1.1 Unpacking the carton ....................................................................................................................4

1.2 Safety Warnings.............................................................................................................................5

1.3 Symbols used on the instrument .................................................................................................6

2. Getting started ........................................................................................................................................7

2.1 Carry case....................................................................................................................................... 7

2.2 Instrument layout ........................................................................................................................... 8

2.3 Controls layout............................................................................................................................... 8

2.4 Instrument start-up ........................................................................................................................9

2.5 Switching off the appliance tester................................................................................................ 9

2.6 Testing an asset...........................................................................................................................10

2.7 Remote test probe and clip.........................................................................................................12

3. Test options ..........................................................................................................................................13

3.1 110 V or 230 V selection:.............................................................................................................13

3.2 Class I - Assets with an earth return conductor ............................................................. 14

3.3 Class II – Assets with no earth conductor ......................................................................... 15

3.4 IEC - Power leads fitted with 10 A IEC connector............................................................16

3.5 Extension leads - Single and multi-way extension leads .............................................17

3.6 RCD ....................................................................................................................................18

3.7 Test failure....................................................................................................................................19

3.8 Changing PASS limits .................................................................................................................19

4. Individual tests – Quick tests: ............................................................................................................. 20

4.1 Bond (Rpe) ...........................................................................................................................20

4.2 Insulation (also referred to as Riso) .................................................................................21

4.3 Leakage (Ipe) ....................................................................................................................22

4.4 VA ........................................................................................................................................26

4.5 1.5 kV/ 3 kV (not available on PAT310 or 320) ..................................................................27

5. SETUP....................................................................................................................................................29

5.1 Test Group key configuration.....................................................................................................29

5.2 Quick test key setup .................................................................................................................... 30

5.4 Lead Null ....................................................................................................................................... 31

6. Battery and fuses..................................................................................................................................32

6.1 Battery function............................................................................................................................32

6.2 Battery replacement.....................................................................................................................32

6.3 Fuse replacement.........................................................................................................................32

7. Care and maintenance .........................................................................................................................32

8. Specification .........................................................................................................................................33

9. Repair and Warranty.............................................................................................................................36

1.1 Unpacking the carton

Unpack the carton contents carefully. There are important documents that you should read and 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.

PAT310 & 320 carton contents

PAT350 Carton contents

PAT300 series appliance tester

Carry case

Quick-start guide

Black test lead set with probe and clip

IEC lead 0.5 m (Extension lead adaptor)

Warranty card

Owners CD manual

1 PP3 9 V NiMH rechargeable battery

Flash test lead

1.2 Safety Warnings

The following Safety Warnings and Precautions must be read and understood before the instrument

is used. They must be observed during use.

! For safety, only connect the PAT to a supply that is properly earthed. If in doubt, the supply should

be checked by a qualified electrician.

! Do not use the instrument if there are any signs of damage. ! All test leads, probes and clips must be in good order, clean and with no broken or cracked

insulation.

! Probes and clips should be held behind the finger guard. ! Test leads not used during a measurement should be disconnected from the Appliance tester. ! For dual voltage testers, both sockets can be live simultaneously. ! Only connect one asset to the PAT during testing. ! Tests should be carried out in the order recommended below. An appliance that fails a test should

be repaired before further testing is carried out.

Recommended Sequence:

1. Earth Bond/ Continuity of the protective earth conductor (Class I devices)

2. Insulation test (or earth leakage)

In addition further tests can be performed

3. Operation test

4. Leakage test

! Only perform an operational test after the Earth bond and insulation tests have been completed, as

this test operate at mains voltage.

! During testing, ensure no hazard will exist as a result of normal running or under fault conditions. ! During testing the unit under test (asset) should not be touched, other than using the appropriate

accessories, as faulty appliances can present a shock hazard.

! Do not touch the exposed parts of test leads during tests as hazardous voltages may be present due

to potentially faulty appliance.

! Do not touch the IEC extension lead socket pins especially during a test, as hazardous voltages may

be present due to a potentially faulty appliance

! Assets should not be routinely flash tested. Where flash testing is required, refer to further guidance

on Flash testing, section 4.5.

! Replacement fuses must be of the correct rating and type. Refer to section 6.3 ! The USB connection should only be used by approved service personnel; nothing should be

connected to the USB port during testing.

! Only use NiMH rechargeable 9 V PP3 battery, do not use a non rechargeable type as this could

become dangerous if charged by the instrument.

! Serviceable fuses should only be replaced with those that are suitably rated ! In case of an emergency use an easily accessible power point

CAT II Measurement category II: Equipment connected between the electrical outlets and the user’s equipment.

CAT III Measurement category III: Equipment connected between the distribution panel and the electrical outlets.

CAT IV Measurement category IV: Equipment connected between the origin of the low-voltage mains supply and the distribution panel.

1.3 Symbols used on the instrument

Caution: risk of electric shock

Caution: refer to accompanying notes. When displayed at the start of an insulation test, warns that a hazardous voltage may exist at the test lead probes

Equipment complies with relevant EU Directives

Equipment complies with ‘C tick’ requirements

FUSED

THIS EQUIPMENT SHOULD BE RECYCLED AS ELECTRONIC WASTE

HV TEST LEAD IN UNLOCKED POSITION

HV TEST LEAD IN LOCKED POSITION

BATTERY TYPE FITTED

DO NOT CONNECT TO 230 V SUPPLY

2. Getting started

2.1 Carry case

The carry case for the appliance tester has a lead storage pouch in the lid of the case when opened. This is designed for basic lead and document storage.

Further items can be stored in the pouch. If it becomes difficult to close the case, the storage pouch can be removed from inside the case and attached to the front using the straps on the reverse of the pouch.

These are passed through the D-loops on the outside of the case and secured to the underside of the pouch using the Velcro fixings.

An additional storage pouch is available from Megger Ltd for extended storage, such that there is a pouch on both the inside and outside of the carry case.

9 V PP3 rechargeable NiMH Battery is supplied- not fitted. This should be installed prior to first use. See section 6 for instructions.

2.2 Instrument layout

2.3 Controls layout

The following tests are available on the PAT350. Note: The PAT310 & 320 does not include the Flash test option (j).

Test groups (a) to (d) – See section 3 for details Test group

Description

(a)

Class I test

For testing assets with an earth return conductor

(b)

Class II test

For testing assets without an earth return conductor

(c)

IEC lead and Extension lead test

For testing extension leads and IEC type power leads (found on computers, kettles etc)

(d)

RCD tests

For testing Plug-in RCDs and extension leads fitted with RCDs.

(e)

Information

Provides technical support contact information

Individual tests (f) to (j)

(f)

Bond test (Rpe)

Performs an earth bond/continuity test at 200 mA,10 A or 25 A

(g)

INS test (Riso)

Performs an Insulation test at either 250 V or 500 V

(h)

Leakage test (Ipe)

Performs a RUN test and measures the power drawn

(i)

Load test (VA)

Performs an earth leakage test, either: Differential earth leakage Touch leakage Substitute leakage

(j)

Flash1.5 kV/3 kV

Performs a flash test at the required voltage

Appliance test socket 110 V

Flash test socket (PAT 350 only)

Earth bond and Insulation test probe socket

Lead null post

Firmware upgrade port

Power off (Red), Home (Grey) and Escape (Green) keys

Test keypad

Mains lead entry

Extension lead / IEC lead test return socket 10

Appliance test socket (230 V) 11

Fuse checker 12

Display 13

Display navigation UP / DPWN / LEFT / RIGHT OK 14

TEST button

(a)

(h)

(i)

(j)

(g)

(b)

(f)

(e)

(d)

(c)

2 3 4

13 14

10 6 8 9 7

2.4 Instrument start-up

Connect the instrument to a suitable electrical supply: The appliance tester will automatically start when connected to the mains supply.

NOTE: DO NOT connect any equipment to the PAT tester until it has been switched on and passed self test. Connected equipment will create a relay error and necessitate restarting the appliance tester by pressing the OFF button. Once switched off the power should be disconnected and reconnected.

The following warning screen is displayed when the PAT tester is switched on. This screen is not displayed if the PAT tester is re-started within five minutes of switching off, when the PAT tester restarts from the same screen as before.

Home Setup

WARNINGS: The following warnings must be read and understood before proceedingt :

_ Power is applied to both sockets during testing . Ensure only one asset is connected and tested at a time .

_ Faulty appliances can present a shock hazard . Avoid contact with al conductors and conductive parts during testing .

_ All tests that include a load or Leakage test will run the asset . Ensure asset is switched on and safe before starting the test sequence .

Press OK to confirm these warnings have been read and understood

Press OK to confirm you have read and understood these warnings.

Important:

For testing 230 V electrical equipment, connect the PAT tester to a 230 V electrical outlet.

For testing 110 V electrical equipment, connect the PAT tester to a 110 V electrical outlet, using the optional 110 V to 230 V supply lead adaptor (not applicable to PAT310).

The instrument will display the following when all initial tests pass.

Home screen

All testing can be run from this screen

Setup options

Test limits, test duration, Language, Auto or Manual test modes etc can be changed here.

Power-up status and test results

Displays supply status and Self test results

2.5 Switching off the appliance tester

To switch off the tester, press the RED off button. The display will show the message “It is now safe to remove power”. Now the mains plug can be removed from the supply.

Failure to press the RED off button will discharge the FAST START battery un-necessarily as per section

2.5.1.

If the RED off button is pressed accidentally, pressing the

button will return the PAT to normal testing

mode.

2.5.1 FAST Restart

If the tester is to be moved to a new location and testing continued, simply unplug the unit from the mains supply and reconnect it in the new location. The appliance tester will enter a hibernation mode during the move and restart instantly from the point power was disconnected, without any delay. The rechargeable 9 V NIMH battery is used to maintain hibernation status whilst unplugged. This cell is continuously charged whilst the appliance tester is connected to the mains supply. Continuous use of the hibernation mode will discharge the battery. Only use the hibernation mode when a fast restart is required.

Should the move take longer than 5 minutes, the appliance tester will leave hibernation mode and complete a full power down.

2.6 Testing an asset

2.6.1 To run a test - (Example shows a Class I test in AUTOMATIC test mode)

(a) Connect the asset to be tested to the portable appliance tester.

(b) Press the

button for a CLASS I test for assets with a protective earth conductor.

The display will show the initial test information:

Class I results

Ins

Bond

≥ 0.5 M_

≤ 0.1 _

Test Result Limits

Load

≤ 3000 VA

Test Result Limits

Attach probe and press TEST to start

button to start the test.

(d) The Appliance tester will display any operational warnings as well as the measured values during the

test and the remaining test time.

Class I results

Ins

Bond

≥ 0.5 M_

≤ 0.1 _

Test Result Limits

Load

≤ 3000 VA

Test Result Limits

Timer: 5s Bond: 0.08

The first test will be an Rpe (Earth continuity / bond) test. The resistance during the test is displayed.

The Timer shows the number of seconds remaining of the test. After each test the worst case measurement will be displayed and tagged with a GREEN marker for a PASS, or a RED marker for a FAIL.

Note – ABORTING A TEST:

A test can be aborted at any time by pressing the

button.

Each test will run automatically unless there is a manual operation required.

Example:

Earth bond test passed

Example:

Isolation (Insulation) test failed

To return to the HOME screen or run a different type of test, press the

button

At the completion of a successful set of tests the display will show all results marked GREEN and the “Asset PASSED” message displayed:

Example:

OPTIONS:

(1) To return to the HOME screen press the

button.

(2) To repeat the same test (or test another CLASS I asset) press the test button. The

appliance tester will return to the first test screen and wait for the TEST

button to be pressed to

commence testing.

(3) To change the test type, press the appropriate function button.

Should a test fail it will be marked with a RED tag, testing will stop and the display will show “Asset Failed”. Any fault should be made good before testing is re-started.

2.7 Remote test probe and clip

Some tests will require the use of the remote probe and clip. These are used where the asset under test has no earth return (Class II assets). The probe is used for both insulation and bond testing, under the control of the instrument.

Example:

Class I Insulation test (Riso)

Live and neutral are shorted together automatically in the PAT tester and a voltage (250 V or 500 V) is applied between the shorted L/N and the earth conductor as below.

Class II Insulation test (Riso)

Live and neutral are shorted together automatically in the PAT and a voltage (250 V or 500 V) is applied between the shorted L/N and the remote probe.

The probe is connected to any metallic locations on the “Appliance Under Test” to ensure there is no breakdown of the insulation.

Remote probe not required

Remote probe required

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