T&R PT30-10 mk2 Instrucciones de funcionamiento

OPERATING AND MAINTENANCE MANUAL

Product:

High Voltage DC Cable Test Set

Type:

PT30-10 mk2

PT30-10C mk2 with Current Limit

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]

Fax.: 01483 511229 Web: www.trtest.com

GENERAL SAFETY STATEMENT

WARNING

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.

The high voltage generated by this unit is extremely dangerous and may be fatal.

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 dead.

Do not connect and disconnect leads whilst outputs are switched on.

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 unit that must 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

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:

T & R Test Equipment Limited

SAFETY TERMS AND SYMBOLS

The following safety symbols appear on the equipment:

CAUTION/WARNING –Refer to manual

DANGER –High voltage

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 be cause injury or death to the

operator or other personnel if not carried out correctly using

applicable safety procedures.

HIGH VOLTAGE SAFETY

WARNING

It is essential to follow safe working procedures when working with high voltage. Information on accepted codes

of practice should be obtained from your local heath and safety regulatory body.

IEEE standard 510-1983 (IEEE Recommended Practices for Safety in High-Voltage and High-Power Testing)

provides a working framework for establishing safe procedures, but must be read in conjunction with local

regulations and accepted codes of practice.

The following excerpts are taken from IEEE 510

All ungrounded terminals of the test equipment or apparatus under test should be considered as energised.

Common ground connections should be solidly connected to both the test set and the test specimen. As a

minimum, the current capacity of the ground leads should exceed that necessary to carry the maximum

possible ground current. The effect of ground potential rise due to the resistance and reactance of the earth

connection should be considered.

Precautions should be taken to prevent accidental contact of live terminals by personnel, either by shielding

the live terminals or by providing barriers around the area.

The circuit should include instrumentation for indicating the test voltages.

Appropriate switching and, where appropriate, an observer should be provided for the immediate de-

energisation of test circuits for safety purposes. In the case of dc tests, provisions for discharging and

grounding charged terminals and supporting insulation should also be included.

High-voltage and high-power tests should be performed and supervised by qualified personnel.

Consideration should be given to safety regulations which may apply to specific circumstances; for example,

HSE, company, or government regulations.

In the use of signal-gathering equipment, each device should be used in such a manner that it will not

present a personnel hazard should it inadvertently become a part of the high-voltage circuit, or fail to function

properly.

CONTENTS

1. DESCRIPTION OF EQUIPMENT 9

1.1 Electrical Specification 9

1.2 Front Panel Layout 10

1.3 Output Voltage Control 10

1.4 Overload Protection 10

1.5 High Voltage Output Cables and Connectors 11

1.6 Metering 11

1.6.1 kV Meters 11

1.6.2 mA Meters 11

1.7 Discharge and Earthing 11

1.7.1 Automatic Discharge/Earthing 12

1.7.2 Manual Earthing Using DP40 Discharge/Earthing Probe 12

1.8 Construction 12

1.9 Storage 13

2. OPERATION 14

2.1 Safety 14

2.1.1 Installation 14

2.1.2 Operation 15

2.1.3 Inspection 16

2.2 Connection and Testing 17

2.2.1 Connection Sequence 17

2.2.2 Testing Sequence: 19

2.2.3 Disconnection Sequence: 19

2.3 Current Limit Mode (PT30-10C only) 20

2.3.1 Current Limit Description 20

2.3.2 Current Limit Operation 20

3. MAINTENANCE 21

4. STANDARD ACCESSORIES 23

5. PERFORMANCE SPECIFICATION 25

6. REVISION 27

1. DESCRIPTION OF EQUIPMENT

1.1 Electrical Specification

Supply requirements 115V/230V 10% auto-selecting

50/60Hz

750VA maximum

Output voltage 0- 30kVdc with respect to earth

(0-60kV between outputs, centre earthed)

Output current 5mA continuous from each output

10mA from each output with a duty cycle of 5 minutes

on/15 minutes off

Current limiting (PT30-10C only) The PT30-10C has an extra pushbutton control to limit

the output current to a maximum of 7.5mA (dependent on

the output voltage).

Output earth connection The earthy end of the high voltage outputs is connected

to the earth system of the equipment.

1.2 Front Panel Layout

A B C D E

L K H

MG F

Figure 1 PT30-10 Front panel

A Positive HV output with dust cap

H Output HV on pushbutton

B Positive kV meter with dust cap

J mA range select pushbutton

C Positive mA meter

K Negative mA meter

D Supply on/off key switch

L Negative kV meter

E Mains inlet and fuse

M Negative HV output

F Output control

N Earth terminal

G Output HV off pushbutton

P HV Output blanking plug

1.3 Output Voltage Control

The voltage from the equipment is controlled by the output control on the front panel. To increase the

output voltage turn the control knob in a clockwise direction, and to decrease the output voltage turn the

knob anti-clockwise.

Note: The output can not be energised unless the regulator knob is set to zero.

1.4 Overload Protection

The unit is fitted with an F5A fast acting fuse which protects the incoming mains supply to the unit.

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