METREL A 1445 Manuale utente

Flex current clamps

A 1445

User Manual

Version 1.1.0; Code No. 20 752 635

Distributor:

Producer:

METREL d.d.

Ljubljanska 77

SI-1354 Horjul

Tel.: +386 1 75 58 200

Fax: +386 1 75 49 226

E-mail: metre[email protected]i

http://www.metrel.si

Mark on your equipment certifies that this equipment meets the requirements

of the EC (European Community) regulations concerning safety and

electromagnetic compatibility.

No part of this publication may be reproduced or utilized in any form or by any means

without permission in writing from METREL.

Flex current clamps A 1227

Table of contents

1Introducing the A1445 ..............................................................................................4

2Features ...................................................................................................................5

3Safety .......................................................................................................................6

4Symbols....................................................................................................................7

5Measuring current with A 1445.................................................................................8

6Cleaning ...................................................................................................................9

7Service....................................................................................................................10

8Technical specifications..........................................................................................11

Flex current clamps A 1445

1 Introducing the A1445

The A 1445 Flexible Current Clamps consist of the flexible sensor and an

electronic module on the connected wire. It has three current ranges 30A, 300A and

3000 A. The current range of the A 1445 is selected directly by the connected

instrument. The electronic module is powered from the connected instrument to. The

flexible sensor permits measurements on conductors where standard clamp-on current

transformers can not be used. It is particularly useful for installation in tight spaces, or

around breaker panels, cable bundles, wide or large bus bars and irregular shapes.

Unlike standard current transformers, this flexible CP does not use magnetic cores.

The transformation principle is based on an air core. It presents virtually no load to the

system under test, has a low phase shift and excellent frequency response.

Additionally, A 1445 cannot be damaged by overloads. The A 1445 Flexible

Current Clamps are insensitive to DC current and measure only the AC component of

the measured signal.

Flex current clamps A 1445

2 Features

Range setup from the instrument, no additional range setup needed

Power supply for electronic module is assured from the instrument

mV output

Waterproof sensor

Minimum angle shift to accomplish accurate power measurements

High accuracy

Total rejection of d.c. component

Friendly-use of the closing-opening system of the current sensor (even if wearing

gloves) due to its highly ergonomic design

It is possible to set the seal on the closing system of the current clamp.

Very light, flexible and fully adaptable to busbar trunking system and insulated

cables

Strengthened security, regardless the working environment industrial or services

Flex current clamps A 1445

3 Safety

Read the operating instructions before use and follow all safety instructions.

If the test equipment is used in a manner that is not specified in this user

manual, the protection provided by the equipment might be impaired!

Adhere to local and national safety codes. Individual protective equipment must

be used to prevent shock and arc blast injury where hazardous live conductors

are exposed.

Before each use, inspect the Current Clamps and its latching system for any

damage. Pay particular attention to the insulation surrounding the flexible

measuring head. Look for cracks or missing portions of the clamp housing or

output cable insulation. Also look for loose or weakened components.

Do not use a clamp that is cracked, damaged, or has a defective cable.

Never use the clamp on a circuit with voltages higher than 1000 V CAT III or

600V CAT IV.

De-energize the installation on which current will be measured or adopt safe

operating procedures during application and removal of the current clamp.

Use extreme caution when working around bare conductors or bus bars.

Do not use the Current Clamp to measure bare conductors carrying a voltage

from 30V up to 1000V unless you are wearing protective clothing suitable for

high-voltage work. Contact with the conductor could result in electric shock.

Always use appropriate equipment for personal protection.

Use caution when working with voltages above 60 V dc, 30 V ac rms or 42 V ac

peak. Such voltages pose a shock hazard.

Flex current clamps A 1445

4 Symbols

Symbol

Description

Important information. Refer to the manual.

Risk of Electric Shock.

Product is protected by Double/Reinforced insulation

Do not apply around or remove from HAZARDUS LIVE conductors.

Do not dispose of this product as unsorted municipal waste. Contact

Metrel or a qualified recycler for disposal.

Complies with the relevant European standards.

Flex current clamps A 1445

5 Measuring current with A 1445

Picture 5.1: Wrap the measured cable with the measuring clamp

To use the A 1445 Flexible Current Clamps, follow these instructions:

1. Connect the D01 3 Pin connector of the A1445 Flexible Current Clamps to the

desired input on the measuring instrument (power meter,..) .

2. Select the corresponding sensitivity (.. mV/A) on your instrument.

3. Wrap the flexible measuring head around the conductor to be tested, close coupling

(See Picture 5.1 ).

4. It is very important that the conductor is as the center and perpendicular to the

measuring head. (if it is no possible additional error of 2% of full scale can occur).

5. Do not measure close to other current-carrying conductors if possible. (An external

field of 40 A/m can cause an additional measurement error of 1% of full scale).

6. Make sure that the arrow marked on the clamp coupling points toward the correct

orientation for correct phase. (See Picture 5.1 )

7. Keep the clamp coupling more than 2.5 cm (1 inch) away from the conductor to be

tested and other nearby conductors.

8. Observe the current value and waveform on the instrument’s display. If desired,

select the lower range on the measurement instrument.

Flex current clamps A 1227

6 Cleaning

Use soft patch, slightly moistened with soap water or alcohol, to clean the surface

of the A 1445 and leave it to dry totally, before using it.

Do not use liquids based on petrol or hydrocarbons!

Do not spill cleaning liquid over the A 1445!

Flex current clamps A 1445

7 Service

For repairs under or out of warranty time please contact your Metrel distributor for

further information.

Name and address of manufacturer:

METREL d.d.

Ljubljanska cesta 77

SI-1354 Horjul

Tel.: +386 1 75 58 200, fax.: +386 1 75 49 226, +386 1 75 49 206

http://www.metrel.si

E-mail: metrel@metrel.si

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