METREL A 1018 Manuale utente

A 1018 A 1019 A 1033

Current clamps

Zangenstromwandler

Pinzas amperimétricas

Токовые клещи

A 1018 / A 1019 / A 1033

User manual

Benutzerhandbuc

Manual del usuario

Руководство по эксплуатации

Version 1.0, Code no. 20 751 962

Distributor:

Manufacturer:

METREL d.d.

Ljubljanska cesta 77

1354 Horjul

Slovenia

web site: http://www.metrel.si

e-mail: [email protected]

Mark on your equipment certifies that this equipment meets the

requirements of the EU (European Union) concerning safety and

electromagnetic compatibility regulations.

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

any means without permission in writing from METREL.

A 1018, A 1019, A 1033

Table of contents / Inhalt / Indice / Содержание

English

TABLE OF CONTENTS / INHALT...............................................................3

1. WARNINGS..........................................................................................5

2. DESCRIPTION OF CURRENT CLAMPS ............................................6

3. MAINTENANCE ...................................................................................6

3.1. INSPECTION.........................................................................................6

3.2. CLEANING ...........................................................................................7

3.3. SERVICE AND CALIBRATION ..................................................................7

4. CURRENT CLAMP OPERATION ........................................................7

4.1. SUBSTITUTE ELECTRIC MODEL FOR CURRENT CLAMPS ..........................7

4.2. TYPICAL APPLICATIONS ........................................................................8

5. SPECIFICATIONS................................................................................9

5.1. GENERAL PURPOSE CURRENT CLAMP WITH CURRENT OUTPUT...............9

5.2. GENERAL PURPOSE CURRENT CLAMP WITH VOLTAGE OUTPUT ...............9

5.3. SENSITIVE CURRENT CLAMPS WITH CURRENT OUTPUT.........................10

5.4. GENERAL (ALL TYPES) .......................................................................10

Deutsch

1. WARNUNGEN....................................................................................11

2. BESCHREIBUNG DER ZANGENSTROMWANDLER ......................12

3. WARTUNG.........................................................................................13

3.1. INSPEKTION.......................................................................................13

3.2. REINIGUNG........................................................................................13

3.3. REPARATUR UND KALIBRIERUNG ........................................................13

4. FUNKTION DER ZANGENSTROMWANDLER .................................14

4.1. ERSATZSCHALTBILD DER ZANGENSTROMWANDLER.............................14

4.2. TYPISCHE ANWENDUNGEN.................................................................15

5. TECHNISCHE DATEN .......................................................................15

5.1. MEHRZWECK-ZANGENSTROMWANDLER MIT STROMAUSGANG .............15

5.2. MEHRZWECK-ZANGENSTROMWANDLER MIT SPANNUNGSAUSGANG .....16

5.3. EMPFINDLICHE ZANGENSTROMWANDLER MIT STROMAUSGANG ...........16

Typ: A 1018....................................................................16

5.4. ALLGEMEIN (ALLE TYPEN) ..................................................................17

A 1018, A 1019, A 1033

Table of contents / Inhalt / Indice / Содержание

Español

1. AVISOS.............................................................................................. 18

2. DESCRIPCIÓN DE LAS PINZAS AMPERIMÉTRICAS .................... 18

3. MANTENIMIENTO ............................................................................. 19

3.1. INSPECCIÓN ......................................................................................19

3.2. LIMPIEZA...........................................................................................19

3.3. SERVICIO Y CALIBRACIÓN...................................................................20

4. FUNCIONAMIENTO DE LA PINZA AMPERIMÉTRICA....................20

4.1.

SQUEMA ELÉCTRICO DEL FUNCIONAMIENTO DE LAS PINZAS AMPERIMÉTRICAS

4.2. APLICACIONES TÍPICAS ......................................................................21

5. ESPECIFICACIONES ........................................................................21

5.1. PINZA AMPERIMÉTRICA DE USO GENERAL CON SALIDA DE CORRIENTE . 21

5.2. PINZA AMPERIMÉTRICA DE USO GENERAL CON SALIDA DE TENSIÓN......22

5.3. PINZA AMPERIMÉTRICA DE ALTA SENSIBILIDAD CON SALIDA DE

CORRIENTE .............................................................................................. 22

5.4. GENERAL (TODOS LOS TIPOS) ............................................................ 23

Condiciones del medio ...........................................................23

Russian

1. МЕРЫ ПРЕДОСТОРОЖНОСТИ ........................................................ 24

2. ОПИСАНИЕ ТОКОВЫХ КЛЕЩЕЙ .....................................................24

3. ОБСЛУЖИВАНИЕ...............................................................................26

3.1. ПРОВЕРКА ........................................................................................26

3.2. ЧИСТКА ............................................................................................26

3.3. РЕМОНТ ИКАЛИБРОВКА ....................................................................26

4. РАБОТА ТОКОВЫХ КЛЕЩЕЙ ........................................................27

4.1. ЭЛЕКТРИЧЕСКАЯ МОДЕЛЬ ТОКОВЫХ КЛЕЩЕЙ.....................................27

4.2. ПРИМЕРЫ ПРИМЕНЕНИЯ ...................................................................28

5. ТЕХНИЧЕСКИЕ ХАРАКТЕРИСТИКИ.................................................29

5.1. ТОКОВЫЕ КЛЕЩИ ОБЩЕГО НАЗНАЧЕНИЯ СТОКОВЫМ ВЫХОДОМ ........29

5.2. ТОКОВЫЕ КЛЕЩИ ОБЩЕГО НАЗНАЧЕНИЯ СВЫХОДОМ НАПРЯЖЕНИЯ ..29

5.3. ВЫСОКОЧУВСТВИТЕЛЬНЫЕ ТОКОВЫЕ КЛЕЩИ СТОКОВЫМ ВЫХОДОМ .30

21. ОБЩИЕ ХАРАКТЕРИСТИКИ (ДЛЯ ВСЕХ ТИПОВ)...............................31

A 1018, A 1019, A 1033 Current clamps

1. Warnings

To ensure a high level of operator's safety during using of current clamps

the following warnings have to be considered:

Do not use the current clamp if any damage is noticed!

Do not leave open nodes of the current clamp with current output

(A 1018,

A 1019) during measurement to avoid damage and electric shock

on secondary side, never enclose conductor in the jaw unless the

clamp is connected to measuring instrument!

Only a competent, authorized person is allowed to carry out

service intervention!

Consider all generally known precautions in order to avoid risk of

electric shock while dealing with electric installations!

Do not extend hands over safety barrier to prevent of electric

shock! Only handles are allowed to be touched during

measurement!

Symbol on the current clamp indicates the possibility to use

the current clamp on non-insulated conductors.

!Symbol on the current clamp indicates the possibility of a

hazardous live condition if the operator ignores the required safety

measures.

If the current clamp is used in a manner not specified in this User

manual, the provided protection can be impaired!

A 1018, A 1019, A 1033 Current clamps

2. Description of current clamps

The A 1018, A 1019 and A 1033 are 1000/1 ratio current clamps for

measuring alternating currents in the range from 1 mA to 1000 A

(depending on the type).

They can be connected to any power analyzer, energy analyzer, harmonics

analyzer, multimeter, earth resistance meters, electrical installation testers

and other measuring instruments with compatible voltage or current inputs.

In chapter 4 some typical current clamp applications are described.

The current transducer is housed in a plastic case that maintains the

protection class defined in technical specifications. It consists of:

1. Handles,

2. Safety barrier,

3. Conductor opening,

4. Current transformer,

5. Connection with:

a) Safety banana inlet (A 1019),

b) Cable connection (length = 1.5 m) with safety banana terminals (A

1018),

c) Cable connection (length = 1.5 m) with special output connectors

(A 1033).

a) b) c)

3. Maintenance

3.1. Inspection

To maintain operator safety and ensure reliability of the current clamp it is

good practice to inspect it on a regular basis. Check that the enclosure and

optional connection are without defects such as scratches or breaks.

Jaw surface must be clean. Pollution on jaw surfaces reduces the current

clamp sensitivity.

A 1018, A 1019, A 1033 Current clamps

3.2. Cleaning

Use a soft cloth moistened with soapy water or alcohol to clean non-

metallic surface of the current clamps and leave them to dry totally before

using it.

Notes!

Do not use liquids based on petrol or hydrocarbons!

Do not spill cleaning liquid over the current clamps!

To clean jaw cut surfaces use slightly oiled soft cloth.

3.3. Service and calibration

It is essential that your clamp is regularly calibrated in order to guarantee

the technical specification listed in this User manual. We recommend 2-

year calibration interval.

Metrel encloses an original calibration certificate with every new instrument

and clamp.

For recalibration and repairs under or out of warranty time please contact

your distributor for further information.

4. Current clamp operation

4.1. Substitute electric model for current clamps

Equivalent circuit diagram for current clamp measurement:

Clamp

current transformer

Clamp

current transformer

)

Symbols on circuit diagrams have following meaning:

Im Measured (AC) current, primary current

Is Measured current, current transformer secondary current

N1 Number of primary turns - normally N1=1 for current clamps

N2 Number of secondary turns (1000 for all types)

I A-meter

RLMeasuring resistor

U V-meter

A 1018, A 1019, A 1033 Current clamps

Clamp current transformer must always have a low impedance load on its

secondary side. This loading is realized with an A-meter (for current

sensors with current output). Current clamp with voltage output already

contains the load resistor and its output voltage is proportional to measured

current.

The N1:N2 ratio (primary to secondary winding turns ratio) defines the step-

down current ratio and sensitivity of current clamps. For N2 = 1000 the

sensitivity is defined as

1 mA / 1 A, i.e.: 1 mA of output current is generated from 1 A primary

current for

N1 = 1. The general formula for sensitivity are given below:

II mS for current output, and Lm R

for voltage output.

N1 is always integer and means number of passes of conductor carrying

measured current through conductor opening of current clamp.

4.2. Typical applications

Some typical applications of current measurement for standard sensitive

current clamps

(A 1019, A 1033) in combination with appropriate measuring instrument:

-Harmonic analysis,

-Measuring electrical power,

-Measuring current and energy consumption,

-Functional testing of appliances, machines,

-Measuring equipment inrush current, etc.

Additional applications related to low current measurements can be

covered with high sensitive type current clamps (A 1018):

-Measurement of PE leakage current,

-Measurement of differential current and/or current difference,

-Contactless measurement of earth resistance,

-Determining problems in lighting and grounding systems.

A 1018, A 1019, A 1033 Current clamps

5. Specifications

5.1. General purpose current clamp with current output

Type: A 1019

Rated current: 1000 A

Current ratio : 1000:1

Output:1 mA/A, safety banana sockets



4 mm

Electrical characteristics (at R = 1 ):

Measuring range: 0.2 A ÷ 1200 A

Output signal: 0.2 mA ÷ 1.2 A (0.2 A ÷ 1200 A)

Accuracy and phase error:

Primary current [A] 0.1 ÷ 10 10 50 200 1000 1200

Accuracy of output current [%]

2.5 2 1.5 0.9 0.7 0.7

Phase error [] n.a. 3 1.7 0.9 0.7 0.7

Frequency range: 40 Hz ÷ 5 kHz

Continuity of measurements:

1000 A r.m.s. (f < 1 kHz) continuous

1200 A r.m.s. (40 min / 20 min intermitted)

Load impedance: 10 

Working voltage: 600 V max.

Influence of neighbor conductor: <1 mA/A at 50 Hz

Influence of conductor position <0.3 % at f < 400 Hz

Influence of loading: 2 to 10 : 1 % and 1 

Influence of DC current offset: <2.5 % for IDC < 30 A

5.2. General purpose current clamp with voltage output

Type: A 1033

Rated current: 1000 A

Current ratio : 1000:1

Output: 1 mV/A, special connector

Electrical characteristics

Measuring range: 0.2 A ÷ 1200 A

Output signal: 0.2 mV ÷ 1.2 V (0.2 A ÷ 1200 A)

Built in measuring resistor: R = 1 , 0.5 %

Accuracy and phase error

Primary current [A] 0.1 ÷ 10 10 50 200 1000 1200

Accuracy of output current [%]

3 3 2 1.1 1 1

Phase error [] n.a. 3 2 0.9 0.7 0.7

Frequency range: 40 Hz ÷ 5 kHz

Continuity of measurements: 1000 A r.m.s. (f < 1 kHz) continuous

1200 A r.m.s. (40 min / 20 min intermitted)

Working voltage: 600 V max.

Neighbor conductor influence: <1 mV/A at 50 Hz

Influence of conductor position:

<0.3 % at f < 400 Hz

Influence of DC current offset: <2.5 % for IDC < 30 A

A 1018, A 1019, A 1033 Current clamps

5.3. Sensitive current clamps with current output

Type: A 1018

Rated current: 1000 A

Current ratio : 1000:1

Output: 1 mA/A, safety banana plugs



4mm

Electrical characteristics (R = 1 )

Current measuring range: 0.001 A ÷ 1200 A

Output signal: 1 A ÷ 1.2 A (1 mA ÷ 1200 A)

Accuracy and phase error

Primary current [A]

0.1m ÷ 100m 0.1 ÷ 1 1 ÷ 10 10 ÷ 100 100 ÷ 1200

Accuracy of output

current [%]

3 2 1.2 1 0.5

Phase error [] n.a. n.a.

2.2 1 0.7

Frequency range: 40 Hz..5 kHz

Continuity of measurements: 1000 A r.m.s. (f < 1kHz) continuous

1200 A r.m.s. (40 min / 20 min

intermitted)

Load impedance: 10 

Working voltage: 600 V max.

Influence of neighbor

conductor:

<1 mA/A at 50 Hz

Influence of conductor position <0.3 % at f < 400 Hz

Influence of loading: 2 to 10 : 1 % and 1

Influence of DC current offset: <2.5 % for IDC < 15 A

5.4. General (all types)

Safety specification

Over voltage category: 600 V CAT III,

Pollution degree: 2

Double insulation

Environment conditions

Working temperature: -10 C ÷ 50 C

Storage temperature: -30 C ÷ 70 C

Humidity: 0 % ÷ 85 %, linearly

decreasing for T > 35 C

Altitude: working 0 to 2000 m

Applied standards

Safety: EN/IEC 61010-1

EN/IEC 61010-2-32

Mechanical data

Jaw opening: 52 mm

Maximum conductor sizes:

cable: 50 mm

bar: 1 bar 50 mm x 5 mm,

4 bars 30 mm x 5 mm

Flammability of plastic housing:

UL94 – UV1

Dimension: 220 mm x 120 mm x 48 mm

Weight: 600 g

Other outputs availability

Contact manufacturer or local

distributor for further information.

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