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Product:
Type:
DESIGNED AND MANUFACTURED BY:
T & R Test Equipment Limited
15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom
Telephone: 01483 207428
Fax.:
01483 511229
TRUSTED & RELIABLE
OPERATING AND MAINTENANCE MANUAL
High Voltage DC Cable Test Set
PT18-10 mk2
e-mail:
sales@trtest.com
Web:
www.trtest.com
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Table of Contents
Related Manuals for T&R PT18-10 mk2
Summary of Contents for T&R PT18-10 mk2
- Page 1 TRUSTED & RELIABLE OPERATING AND MAINTENANCE MANUAL Product: High Voltage DC Cable Test Set Type: PT18-10 mk2 DESIGNED AND MANUFACTURED BY: T & R Test Equipment Limited 15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom Telephone: 01483 207428 e-mail: sales@trtest.com...
- Page 3 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.
- Page 4 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: This action or procedure may be dangerous if not carried out CAUTION correctly, and may cause damage to the equipment or connected equipment.
- Page 5 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.
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Page 7: Table Of Contents
CONTENTS DESCRIPTION OF EQUIPMENT Electrical Specification Front Panel Layout Output Voltage Control Overload Protection High Voltage Output Cables and Connectors Metering 1.6.1 kV Meters 1.6.2 mA Meters Discharge and Earthing 1.7.1 Automatic Discharge/Earthing 1.7.2 Manual Earthing Using DP20 Discharge/Earthing Probe Construction Storage OPERATION... -
Page 9: Description Of Equipment
DESCRIPTION OF EQUIPMENT Electrical Specification Supply requirements 115V/230V10% auto-selecting 50/60Hz 600VA maximum Output voltage 0-18kVdc with respect to earth (0-36kV 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 Output earth connection The earthy end of the high voltage outputs is connected... -
Page 10: Front Panel Layout
Front Panel Layout Figure 1 PT18-10 Front panel Positive HV output with dust cap Output HV on pushbutton Positive kV meter with dust cap mA range select pushbutton Positive mA meter Negative mA meter Supply on/off key switch Negative kV meter Mains inlet and fuse Negative HV output Output control... -
Page 11: High Voltage Output Cables And Connectors
The outputs from the instrument are protected by means of an electronic trip circuit. The overload is set for 12-15mA at the output. High Voltage Output Cables and Connectors Screened 5 metre long high voltage output cables are provided with the equipment terminated with large clips. -
Page 12: Discharge And Earthing
Discharge and Earthing WARNING The load must be discharged and earthed before any connections are made, broken or touched, and an earth must be maintained on the test object at all times during testing except when high voltage is actually applied. The unit has an internal automatic discharge system and is also supplied with a DP20 external discharge probe suitable for discharging higher capacitance loads. -
Page 13: Automatic Discharge/Earthing
1.7.1 Automatic Discharge/Earthing The unit has an internal fail-safe automatic discharge system with the following ratings: • Max. discharge voltage (kVdc) 20kVdc • Max. discharge energy 2.5kJ • Max. discharge capacitance 10F • Max. discharges per hour The outputs are earthed by the automatic discharge/earthing system when the HV output is off or the unit is switched off. -
Page 14: Storage
Storage The PT18-10 when not in use must be stored in a dry environment; corrosion damage may occur to the HV components if stored in damp environment. Note: If the unit is moved from a cold area to a warmer area condensation could form on the HV components, this would greatly reduce the internal breakdown voltage. -
Page 15: Operation
OPERATION Safety WARNING The output from the PT18-10 is extremely dangerous, and if used incorrectly could be fatal. The unit must only be installed, operated, and maintained by suitably qualified and trained personnel. It is essential to follow accepted safety procedures and local health and safety regulations and guidelines when installing and operating high voltage equipment. -
Page 16: Operation
2.1.2 Operation WARNING It is essential that safe working practices are maintained when conducting high voltage testing. Safe working procedures must be implemented to accepted standards. Always ensure by means of a live line tester that the cable about to be tested is not live. This applies both to old and newly installed cables and also to all phases. -
Page 17: Inspection
Particular attention should be paid to clearances between any parts of the test object at test voltage potential and the test enclosure or barriers. Refer to local safety standards for details of the clearances required. 2.1.3 Inspection Ensure that the unit and all leads are inspected for integrity and for signs of damage each time before any testing is started. -
Page 18: Connection And Testing
Connection and Testing 2.2.1 Connection Sequence WARNING - Ensure that all necessary safety procedures are followed at all times! Connect earth lead between test object earth and PT18-10 earth terminal. Connect discharge/earthing probe to the PT18-10 earth terminal. The earth hook on the probe must now be placed on the test object HV connection point. - Page 19 Blanking plug Connect to low impedance Mains local earth supply Cable under test DP20 Discharge probe Figure 3 Connections for negative unipolar test Cable under test Mains supply Connect to low impedance local earth DP20 Discharge probe Figure 4 Connections for bipolar test...
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Page 20: Testing Sequence
2.2.2 Testing Sequence: WARNING Check that all connections are secure and that all safety procedures have been followed. Re-check that all personnel are out of the test area. Remove the discharge/earthing probe from the test object. Switch ON the supply to the PT18-10 using the key provided. Ensure that the output control is at zero and press the RED HV ON push-button to switch on the HV output. -
Page 21: Maintenance
MAINTENANCE WARNING Extremely hazardous voltages are present internally and on the output of the PT18-10. The unit must only be serviced by suitable qualified and authorised maintenance personnel. Before carrying out any maintenance activity, ensure that the unit is disconnected from the mains. -
Page 23: Standard Accessories
STANDARD ACCESSORIES The following items are provided with the equipment: Mains input lead. 2 keys (for mains ON/OFF switch). 5 metre earth lead fitted with clip and tag. 5 metre high voltage output cable fitted with HT plug & clip, colour coded red. Supplied with protective cap for plug. -
Page 25: Performance Specification
PERFORMANCE SPECIFICATION Insulation resistance at 1000V DC: Not less than 10 megohms between mains input to frame Applied voltage test: 2.0kV rms for 1 minute between mains input and frame Induced voltage test: ± 22kV DC for 5 minutes Flashover test: 6 flashovers at 18kV DC on each output direct to earth Normal voltage test: ±... -
Page 27: Revision
REVISION Product/Type: High Voltage DC Cable Test Set/PT18-10 mk2 File: OM0029.docx Author: I Lake Issue/Date: 5 / 28/02/17 Modified By: K. Mupotsa Checked By: G Biggs Date: 30/05/17... - Page 28 Drawings Required A2/001306 latest issue...
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