T&R KV6-80 Operating instructions

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OPERATING AND MAINTENANCE MANUAL
Product:
High Voltage AC Test Set
Type:
KV3-250 mk2
KV4-300 mk2
KV5-100 mk2
KV5-100T mk2
KV5-200 mk2
KV6-80
DESIGNED AND MANUFACTURED BY:
T & R Test Equipment Limited
15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom
Telephone: [phone] e-mail: sale[email protected]
Fax.: [phone] Web: www.trtest.com
TRUSTED & RELIABLE

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GENERAL SAFETY STATEMENT
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.
•This unit is designed for operation in a designated high voltage test area.
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
provided on the unit for connection to a local earth if necessary. Ensure that the unit is
properly grounded before making any connections to inputs or outputs.
•Output ratings must be observed to prevent fire hazards and risk of injury to the operator.
Consult the product manual for ratings information before making any connections to the
unit.
•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
•This unit is not designed for unattended operation
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

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HIGH VOLTAGE SAFETY
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.

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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.

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CONTENTS
1DESCRIPTION OF EQUIPMENT 7
1.1 Electrical Specification 7
1.1.1 Supply Requirements 7
1.1.2 Output Specifications 7
1.1.3 Zero Voltage Interlock 7
1.1.4 External Interlock 7
1.2 Output Voltage Control 8
1.3 Overload Protection 8
1.3.1 Variable overload 8
1.4 Metering 9
1.5 Fault Burn Facility (except KV5-200 mk2) 10
1.5.1 Fault Burning 10
1.5.2 Burn Switch 10
1.6 High Voltage Connection 10
1.7 Construction 11
1.8 Timer Operation (KV5-100T mk2 only) 11
2. OPERATION 12
2.1 Safety 12
2.1.1 Installation 12
2.1.2 Operation 12
2.2 Front Panel Layout 13
2.2.1 Front Panel Control Functions 15
2.2.2 Rear Panel Control Functions 15
2.3 Method of Operation 16
2.3.1 Connections 16
2.3.2 Operation 16
2.3.3 Timer Operation (KV5-100T mk2 only) 16

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3. MAINTENANCE 17
4. STANDARD ACCESSORIES 18
5. OVERALL PERFORMANCE SPECIFICATION 19
6. REVISION 20

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1 DESCRIPTION OF EQUIPMENT
1.1 Electrical Specification
1.1.1 Supply Requirements
KV5-100 mk2 115/230V ±10% 600VA max
KV3-250 mk2 115/230V ±10% 900VA max
KV4-300 mk2 230V ±10% 1400VA max
KV5-200 mk2 230V ±10% 1100VA max
KV6-80 115/230V ±10% 600VA max
1.1.2 Output Specifications
The output voltage, current and duty cycle are as follows:
Unit Output voltage
Output current
5 min on/
15 min off 1 min on/ 15 min off 40 seconds on/ 15 min off
KV5-100 mk2 0-5kV 100mA - -
KV3-250 mk2 0-3kV 125mA 250mA 300mA
KV4-300 mk2 0-4kV 200mA 300mA -
KV5-200 mk2 0-5kV 100mA 200mA -
KV6-80 0-6kV 80mA - -
One side of the high voltage transformer output is connected to the earth system of the
equipment.
1.1.3 Zero Voltage Interlock
The equipment is fitted with a zero volt interlock system on the output control. This interlock
prevents the output being energised unless the output control is in the minimum output
position.
1.1.4 External Interlock
The equipment is fitted with a external interlock system. The interlock socket on the back
panel must have a short circuit across it terminals to enable the output to be energised.
Note: the open circuit voltage across the interlock terminals is 240Vac and is connected
directly to the mains supply.

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The unit is supplied with a plug fitted to the external interlock socket on the rear of the unit.
The plug contains a shorting link to enable the unit. If external interlocks are used, the
interlocks should replace the shorting link. Please note that the output will not switch on
without either the link fitted in the plug or a closed external interlock circuit.
1.2 Output Voltage Control
The output from the equipment is controlled from zero by means of the output control. To
increase the output voltage turn the control knob in a clockwise direction.
Note: The output cannot be energised unless the regulator knob is set to zero, thus operating the
zero voltage interlock switch.
1.3 Overload Protection
The equipment is fitted with a fuse and variable overload protection circuits as standard.
1.3.1 Variable overload
The variable overload protection system senses current changes in the high voltage circuit.
The trip levels are adjustable in two ranges each of 6 steps giving 2-12% and 20-120% rated
current.
Unit Trip current ranges
X1 X10
KV5-100 mk2 2, 4, 6, 8, 10, 12mA 20, 40, 60, 80, 100, 120mA
KV3-250 mk2 5, 10, 15, 20, 25, 30mA 50, 100, 150, 200, 250, 300mA
KV4-300 mk2 6, 12, 18, 24, 30, 36mA 60, 120, 180, 240, 300, 360mA
KV5-200 mk2 4, 8, 12, 16, 20, 24mA 40, 80, 120, 160, 200, 240mA
KV6-80 1, 2, 4, 6, 8, 10mA 10, 20, 40, 60, 80, 100mA
The range change and selector switches are located on the front panel of the instrument.
The circuit will activate when the load current exceeds that set by the trip level selector switch.
WARNING
The variable overload trip circuit does not limit the output current.

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1.4 Metering
The equipment is provided with the following metering ranges using analogue moving coil
meters:
Unit
Metering Ranges
Voltage Current
Low High X1 X10
KV5-100 mk2 3kV 6kV 10mA 100mA
KV3-250 mk2 1.6kV 3.2kV 30mA 300mA
KV5-200 mk2 3kV 5kV 20mA 200mA
KV6-80 4kV 7kV 10mA 100mA
The ranges on both instruments are selected by means of switches located on the front panel.

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1.5 Fault Burn Facility (except KV5-200 mk2)
The KV5-100 mk2, KV3-250 mk2 and KV4-300 mk2, KV6-80 are provided with an internal
current limit circuit which limits the output current from the unit under short circuit conditions.
This can be used to “burn” faults.
1.5.1 Fault Burning
Fault burn is where the arc is maintained through the failed test object. The product does this
by limiting the current and preventing the unit from tripping. Fault burning should be
approached very cautiously as it can cause serious damage to the test object, and is totally
unsuitable for many test objects.
1.5.2 Burn Switch
When the “burn” switch is in the “out” position, the unit behaves normally and the output
current is not limited. Switching the “burn” switch to “in” enables the current limiting
The current is limited to the following values at maximum output voltage when the “burn” is
enabled (the burn switch is in the “in” position):
Output Voltage Maximum current
KV5-100 mk2 5kV 90-100mA
KV4-300 mk2 4kV 280 –300mA
KV3-250 mk2 3kV 160-180mA
KV6-80 6kV 75-80mA
At lower output voltages, the burn current limit reduces in proportion to the output voltage.
When the “burn” switch is in the “out” position, the maximum current is approximately 2A for
short periods of time.
1.6 High Voltage Connection
WARNING
The equipment is supplied with crocodile clips on the output. These clips are
not insulated for high voltage use, and under no conditions must the high
voltage connection be approached or to
uched whilst the unit is switched on.
The test object must be earthed before making or breaking connections after
testing. A prohibition zone of at least 30mm must be maintained around the
high voltage connection (from EN50191:2000)
This equipment must b
e used either with an interlocked enclosure for the
object under test or in a suitable high voltage test area. Adequate safety
clearances must be maintained between the operator and all high voltage
parts at all times.

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1.7 Construction
The unit is housed in a robust case with a carrying handle. The handle will also act as a tilt
support stand which is locked in various positions by pressing the release buttons at each end
of the handle.
1.8 Timer Operation (KV5-100T mk2 only)
The KV5-100T mk2 is fitted with a 5 second-5 min test duration timer. The test timer has two
controls; ‘Select Test Time’ and ‘Alarm Cancel’. The timer has nine switch-selectable ranges
of 5, 10, 15, 20, and 30 seconds and 1, 2, 3 and 5 minutes. There is an ‘OFF’ position for
when the timer operation is not required.
The timer is started when the output ‘HV ON’ push button is pressed. The timer indicator then
flashes per second for the duration of the time selected. When the timer has reached the
selected time an intermittent alarm sounds, this is cancelled by pressing the ‘Timer cancel’
push button.
The audible alarm is cancelled using the ‘Timer cancel’ push button.
WARNING
The timer does not switch the high voltage output off –
it only warns the
operator when the required time has elapsed. At the end of the test time, the
output control should be run down to zero before switching the output off.
The high voltage output remains until ‘HV OFF’ button is pressed, ‘TIMER CANCEL’ does not
turn the output off.
The timer is cancelled if there is an over current trip condition, should this occur the ‘RESET’
button must be pressed to clear the trip and silence the audible alarm.
Timer operation may be aborted by pressing the ‘TIMER CANCEL’ push button.
Adjusting the ‘TIMER’ select switch during a timed operation will have one of the following
effects:
•Change to a longer setting will extend the period to the new value.
•Change to a shorter setting will limit the period to the new value.
•Change to a setting shorter than has already elapsed terminates the timing.
•Change to the ‘OFF’ setting triggers the timer alarm

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2. OPERATION
2.1 Safety
The outputs from all units in the range are very 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. A risk assessment should
be undertaken on both the installation and the working procedures to ensure the safety of test
personnel and all other personnel.
2.1.1 Installation
The unit is designed to be installed and used in an indoor environment.
2.1.1.2 Test Area
The unit must be installed in a suitable high voltage test area completely enclosed by walls or
some type of physical barrier. Appropriate controls and safety measures must be applied to
this area including interlocks connected to the supply or HV unit interlock to ensure that the
unit cannot be switched on unless the area is secure. Refer to BS EN50191:2001 and IEEE
Std 510-1983 for further details of suitable test enclosures. The test area must also be
identified with suitable signs.
2.1.1.3 Mains supply
The unit must be connected to a suitable supply via an approved and suitably rated mains
connector with earth connection.
2.1.1.4 Earthing
The unit must be securely earthed. The earth terminal on the rear of the unit may be
connected to a low impedance local earth if required.
2.1.2 Operation
It is essential that safe working practices are maintained when conducting high voltage
testing. Safe working procedures must be implemented to accepted standards.
2.1.2.1 Interlocks
The KV5-100 mk2 series are provided with an external interlock circuit that may be used to
link to interlock switches on the high voltage test area.
An interlock should be considered to be a safety back-up feature. An interlock should not be
regarded as a substitute for adequate safety rules and proper operator vigilance.

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2.2 Front Panel Layout
Figure 2.1 KV5-100 mk2 front panel
kV.AC
1
2
3
0.5
1
1.5
mA
F G H JK L M P
DB
A
N
CE
Figure 2.2 KV3-250 front panel

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Figure 2.3 KV5-100T front panel
Figure 2.4 KV5-200 front panel

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Figure 2.5 KV4-300 mk2 front panel
2.2.1 Front Panel Control Functions
A kV Meter
Displays output voltage
B mA Meter
Displays load current
C mA x1/x10 selector switch
Selects mA meter range
D Burn switch
Selects burn facility
E Trip reset switch
Resets the output current trip
F HV Output lead
HV output to object under test
G kV meter range switch
Selects kV meter range
H Earth output lead
Earth output to object under test
J HV Output ON pushbutton
Switches HV output on. Illuminated red when
output is on.
K Variable trip level select
Selects output current trip level
L HV Output OFF pushbutton
Switches HV output off. Illuminated green
when output is off.
M Mains supply switch (key operated)
Key operated mains on/off switch
O Emergency stop button
Switches HV output off.
N Supply on indicator
Supply on indicator
P Output level control
Set output voltage
Q Timer reset pushbutton (T only)
Timer running indicator
Resets timer and cancels alarm
T Test time select (T only)
Selects test time
U Output trip
Flashover trip – KV5-200 mk2 only
2.2.2 Rear Panel Control Functions
Mains voltage selector
Selects mains input voltage
Interlock socket
For connection to an external interlock system
Earth terminal
For connection to a low impedance local earth

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2.3 Method of Operation
2.3.1 Connections
WARNING
Before making any connections please ensure that you are aware of all
hazards relating to the system and environment in which it is operating.
Ensure that the key switch is in the off position and the key is removed
before making any connections. The test object must be earthed before
making or breaking any connections after testing.
Ensure that the key switch is in the off position and the key is removed before making
connections to the object under test or connecting the unit to the mains supply.
Connect the mains input lead to a suitable three pin supply outlet.
2.3.2 Operation
Switch on the key-operated mains switch. The following will now occur:
a. Power ON lamp will be lit
b. HV OFF lamp will be lit
c. The variable overload reset lamp will be lit
Press the variable overload reset push button. This will arm the trip circuit.
Select the desired voltage range on the kV meter and set the desired overload trip level.
Before commencing testing ensure that all external interlocks are closed, the emergency stop
button is released and that the regulator is in the fully anti-clockwise position.
Press the HV ON pushbutton. The HV output will now energise, and the red HV on indicator
in the pushbutton will light up. The output voltage can now be increased to the desired level as
indicated on the kV meter.
In the event of a test object failure the HV output will be automatically switched off by the
protection system.
When the test is completed, turn the regulator control knob fully anti- clockwise and switch off
the HV output and then the mains supply.
In case of emergency, the emergency stop push button is provided, switching off the HV
output when engaged.
2.3.3 Timer Operation (KV5-100T mk2 only)
The timer is started when the output is switched on. The indicator in the timer cancel button
flashes for the duration of the time selected indicating that the timer is in operation. An alarm
sounds to indicate the timer reaches the selected time duration. The audible alarm is
cancelled using the ‘Timer cancel’ push button.
WARNING
The timer does not switch the high voltage output off – it only warns the
operator when the required time has elapsed. At the end of the test time, the
output control should be run down to zero before switching the output off.

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3. MAINTENANCE
WARNING
Maintenance and repair of the KV5-100 mk2 series must only be carried out
by suitably qualified and trained personnel. Potentially lethal voltages are
present inside the unit and on the output leads.
Ensure that the unit is disconnected from the mains before removing
any covers.
It is advisable to check the carbon brush on the variable transformer for signs of wear on a
regular basis. To gain access to the variable transformer remove the top cover of the unit
(secured by four screws - two in each side of the case).
Replacement brushes are available from T&R Test Equipment.

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4. STANDARD ACCESSORIES
The following items are provided with the equipment:
a. Mains input lead.
b. 2 keys (for mains ON/OFF switch).
c. Operating & Maintenance Manual.
d. 1x F5A 1¼ inch fuse and 1x T4A 20mm fuse: KV5-100 mk2, KV3-250 mk2, KV6-80
1xT5A 1¼ inch fuse and 1xT8A 20mm fuse: KV4-300 mk2.
1 off T6.3A: KV5-200 mk2.

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5. OVERALL PERFORMANCE SPECIFICATION
Insulation resistance at 500V DC: >10 megohms between mains input and frame.
Applied voltage test: 2.0kV RMS for 1 minute between mains input and frame.
Accuracy of instruments
kV meter: ±1.5% of FSD
mA meter: ±2.5% of FSD
Instrument calibration is traceable to national standards.