T&R Z-OVR Mode d'emploi

OPERATING AND MAINTENANCE MANUAL

Product: Cable Impedance Test System

Type: Z-OVR

Software version 1.04

DESIGNED AND MANUFACTURED BY:

T & R Test Equipment Limited

15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom

Telephone: 01483 207428 e-mail: [email protected]

Web: www.trtest.com

GENERAL SAFETY STATEMENT

CAUTION

The following safety precautions should be reviewed to avoid injury to the user and damage to the product

(and other products connected to it). To avoid potential hazards only use this product as specified.

 Only suitably qualified personnel should use this equipment. Servicing of this product should

only be carried out by suitably qualified service personnel.

To Avoid Fire Hazards and Personal Injury

 Use the correct power supply lead. Only use a suitably rated and approved power supply lead for

the country of use.

 Ensure that systems that the unit is to be connected to are isolated from the supply and earthed.

 Do not connect and disconnect leads whilst outputs are switched on. Breaking the output circuit with

current flowing may cause potentially fatal arcing.

 Ensure that the product is grounded. To avoid electric shock, it is essential that the grounding

conductor is connected to the earth ground. An additional earth terminal is provided on the unit that

should be connected to a local earth. Ensure that the unit is properly grounded before making any

connections to inputs or outputs.

 Terminal ratings must be observed to prevent fire hazards and risk of injury to the operator. Consult

the product manual for ratings information before making connections to any terminal.

 It is ESSENTIAL to consult the product manual for rating information before making any connection

to a terminal or terminal group marked with a warning triangle.

 Only use fuses of a type and rating specified for this product.

 Do not operate the unit out of its case or with any covers or panels removed.

 Do not touch exposed connections and components when power is present.

 Do not operate the product if any damage is suspected. Refer the unit to qualified service personnel

to be checked.

 Do not operate the unit in wet or damp conditions.

 Do not operate the unit in an explosive atmosphere.

 Do not operate the unit if there is the possibility of lightning strikes on the line under test or connected

lines.

If any further queries occur regarding the usage and maintenance of the equipment detailed

in this manual, please refer these to the supplier of the equipment in the first case or to the

manufacturer, T & R Test Equipment Limited.

SAFETY TERMS AND SYMBOLS

The following safety symbols appear on the equipment:

CAUTION/WARNING – Refer to manual

Mains off

Mains on

The following safety symbols appear in this manual:

CAUTION

This action or procedure may be dangerous if not carried out

correctly and may cause damage to the equipment or

connected equipment.

WARNING

This action or procedure may cause injury or death to the

operator or other personnel if not carried out correctly using

applicable safety procedures.

! Note This is useful information that may make testing easier, help

in interpretation of results or prevent confusion.

CONTENTS

1. DESCRIPTION OF EQUIPMENT 7

1.1 Panel layout and functions 8

1.1.1 Control unit 8

1.1.2 Output unit 10

1.1.3 Display 12

1.1.4 Warning messages 12

1.2 Installation 13

1.2.1 Environment 13

1.2.2 Supply requirements 13

1.2.3 Cables 14

1.2.4 System connections 17

1.2.5 Overload protection 18

1.3 Functions 18

1.3.1 Output 18

1.3.2 Metering 19

1.3.5 Result storage 23

2. THEORY OF OPERATION 26

2.1 Kelvin connection 26

2.2 Impedance testing 27

2.3 Phase reversal to avoid interference 28

3. OPERATION 29

3.1 Setting up 29

3.1.1 System connections 30

3.1.2 Line connections 30

3.2 Testing 33

3.3 After Testing 34

4. MAINTENANCE 35

4.1 Output Control Brushes 35

4.2 Removal of the Z-OVR from Case 35

5. STANDARD ACCESSORIES 37

5.1 Spare Fuses Supplied: 37

5.2 Standard Accessories Supplied: 37

6. OVERALL PERFORMANCE SPECIFICATION 39

6.1. Insulation Resistance at 1000V DC 39

6.2. Applied Voltage Test 39

6.3. Accuracy of Instruments 39

6.3.1 Current metering 39

6.3.2 Voltage metering 39

6.3.3 Phase metering 39

7. REVISION 41

1. DESCRIPTION OF EQUIPMENT

The Z-OVR is a line/cable impedance measurement system for high voltage ac systems. The

impedance of the line is measured by injecting a current and measuring the magnitude and

phase angle of the voltage developed across the line. The resistance and reactance of the line

are calculated from these results and displayed. The system uses a 4-wire measurement with a

Kelvin connection to the line under test to eliminate measurement errors due to voltage drops

in the leads.

The unit has the facility to store test results to a USB memory key.

The system consists of a separate control unit containing all metering and control functions and

an output unit that provides the high current output and isolation of measured voltages. All

connections to the line are made via the output unit.

The system is supplied with three overhead line Kelvin clamps, one earth Kelvin clamp, one

earth lead and all interconnecting and supply leads.

Three outputs are provided on the output unit (75V 80A, 150V 40A and 300V 20A) to allow a

wide range of lines to be tested.

WARNING

The Z-OVR system must only be used on ‘dead’ systems (i.e. no externally

supplied voltages are present on the test object) with safety earths applied.

Extreme caution must be applied due to the possibility of induced voltages from

other energised circuits. Under no circumstances connect a PCU1 to a live system

or lines without earths applied.

WARNING

Under no circumstances use any of the leads supplied with the unit as earthing

equipment for high voltage lines or cables. Approved earthing equipment must be

used in accordance with accepted working practices before connections can be

made between the line and Z-OVR.

B C D E

1.1 Panel layout and functions

1.1.1 Control unit

Figure 1.1 Z-OVR front panel

ITEM FUNCTION

A Output unit metering connection Metering/control connection to output unit

B Output circuit breaker Protection for control unit output

C Output unit power connector Power supply to output unit

D Mains input switch/circuit breaker Supply isolation switch and protection

E Mains inlet connector Mains supply connection

F Earth Terminal Terminal for optional connection to local

earth for enhanced safety

G Fuse Fuse for metering and control circuits

H Power indicator Supply on indicator

I RS232 connector Serial connection for PC/printer connection

J Main output control Sets output current

K Output off button Switches output off. Illuminates green to

show that output is off.

L Output on pushbutton Switches output on. Illuminates red to show

that output is on.

M Adj. digital pot Control to select values for result storage

N Impedance measurement select Selects calculated value to display-

impedance, frequency or harmonics

O Store pushbuttons Pushbutton switches for store result and

selection

P Liquid crystal display Shows current, voltage and calculated values

Q Voltmeter range select Selects voltage measurement range

R Store result select Controls result storage functions

S Ammeter range select Selects ammeter range

T USB sockets USB sockets for keyboard and memory key

A B

H I

1.1.2 Output unit

Figure 1.2 Output unit front panel

Table des matières

Autres manuels T&R Équipement de test

T&R

T&R KV6-80 Mode d'emploi

T&R

T&R KV mk2 Series Mode d'emploi

T&R

T&R KV30-40D mk3 Mode d'emploi

T&R

T&R KV5-100 mk3 Mode d'emploi

T&R

T&R PT30-10 Mode d'emploi

T&R

T&R PT15-10s Mode d'emploi

T&R

T&R 200A-3PH Mode d'emploi

T&R

T&R CU-Ps Mode d'emploi

T&R

T&R 200A-3PH mk2 Mode d'emploi

T&R

T&R PT18-10 mk2 Mode d'emploi

T&R

T&R PT30-10 mk2 Mode d'emploi

T&R

T&R PCU2 mk5 Mode d'emploi

T&R

T&R KV30-40 Mode d'emploi

T&R

T&R TPT9000 Mode d'emploi

Manuels Équipement de test populaires d'autres marques

SMART

SMART KANAAD SBT XTREME 3G Series Manuel utilisateur

Agilent Technologies

Agilent Technologies BERT Serial Manuel utilisateur

Agilent Technologies

Agilent Technologies N3280A Manuel utilisateur

Vernier

Vernier Go Direct Voltage Manuel utilisateur

Lifeloc

Lifeloc R.A.D.A.R. Manuel utilisateur

Fluke

Fluke T5-600 Instructions d'utilisation et d'installation

Mercury

Mercury TSL01 Manuel utilisateur

MAHA

MAHA MBT Series Manuel utilisateur

Fuji Electric

Fuji Electric P-61 Manuel utilisateur

ETC

ETC SealerAtor Manuel utilisateur

Skyfine

Skyfine ETHYWAY V2 Manuel utilisateur

Appion

Appion G5 Twin Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 8159-0112A Manuel utilisateur

BW Technologies

BW Technologies MicroDock II Manuel utilisateur

Sun Nuclear

Sun Nuclear 1027 Manuel utilisateur

Biomark

Biomark HPR LITE READER Manuel utilisateur

Hioki

Hioki 3169-20 Manuel utilisateur

Ashcroft

Ashcroft ATE-100 Manuel utilisateur