High Voltage PFT Series Mode d’emploi
Safety,Operation,andProcedureInstructionsforthePFTSeriesof
ACHipots
Danger- Lethal Voltages:
Equipment to be used by trained personnel only
This Operator Manual contains instructions for the operation of a High Voltage power source. The operator of this equipment
must use good judgement and follow all safety precautions noted in this guide to ensure the protection of himself and others in
close proximity to the test area. Failure to follow the instructions could result in injury or
death. Proper grounding of the test set must be done prior to connecting this unit
to a power source.
PFT
SERIES
Please Refer to
Documentation
Before Operation
OperatorManual
Last saved 1/29/2009
T:\PRODUCT\DOCUMENTS\Manuals\PFT\MANpft_2k9Re.doc
TableofContents
About the Operator Manual 1
SECTION 1
General Information 2
Features and Specifications 2-3
Controls and Indicators 4-5
SECTION 2
Setting up the Equipment 6
Operating the Equipment 7-10
Blank Page for Notes 11
SECTION 3
Performing Special Operations 12
Meter Re-calibration 12,13
Miscellaneous 14
Packing the Cables 14
Return Material 15
Warranty 16,17
OPERATOR MANUAL
- 1 -
AbouttheOperatorManual
Important
ThisOperatorManual describesthe featuresand safeoperation ofa High
VoltageTestSet.The instructionsare intended to be clear and simple, but
the operator must betrained and qualified according to established
procedures forthe use of thistype of equipment.
ThisOperator Manual isorganized toprovide information onthe PFT Series ofHipots in steps that familiarize
thenew operator withthe operationof thistestset.
Section1: Specifications andControls.
Section2: Setup andOperation.
Section3: Performing SpecialOperations.
TheFunctions,Features,andSpecifications ofthePFTSeriesof ACHipotsarealsodiscussedinthePFTBrochure
availablefromHighVoltage,Inc.
2
GeneralInformation
Thissection familiarizes theoperator withthe features andspecificationsof the
PFT Series ofPower Frequency AC Test Sets manufacturedby HIGH VOLTAGE, INC.
Features and Specifications
The PFT Series of AC hipot test sets provide continuously adjustable output voltages for the GO/NO-GO
testing of high voltage insulation. Earlier versions of the PFT Series were equipped with operator controlled
capacitive compensation switches to minimize input primary currents. The new simplified controls incorporate
thisfeature transparently.
Standardfeatures ofthe PFT Seriesof include:
•Continuouslyadjustable output voltage
•Fixed overload, factoryset to 120% of variabletransformerrated outputcurrent
•“ZeroStart” and ExternalInterlock provision
•Secondaryconnected dual-range voltmeter
•Shieldedoutput cable (50kV andbelow) precludesunnecessary insulated support ofthe cable
•Onepiece portable design(50 kV andbelow)
•Transitprotected meters preventmeter damagebetween test sites
•Capacitive load compensation incorporated to allow up to 3 KVA output power with less than 15
Amperesinput line current.
•FaultBurn Reactor (Optional)
SECTION
1
3
PFT MODEL SPECIFICATIONS
PFT-103
PFT-303
PFT-503
PFT-1003
SEE SPECIFICATIONS
ON LAST SHEET OF PARTS LIST
Table 1 PFTSeries Specifications.
4
VOLTMETER
LOW HIGH
OUTPUT
GROUND
INPUT
FUSE
MAIN
POWER HIGH
VOLTAGEOFF ON
EXT
INTLK
AC TEST SET PFT SERIES
RETURN
MODE
GUARDGROUND
LOAD
RETURN
CURRENT RANGE
X10 X1
X100
PLEASE REFER TO
DOCUMENTATION
BEFORE OPERATION
Figure1 PFT Series front panel controls.
MAIN POWER
TheMAIN POWER pushbutton switch provides the power to the controland powercircuits. Theneon lamp in
the switch will light when the power is on and voltage is available through the input line cord. The INPUT
FUSE located electrically beforetheMAIN POWER switch provides linefault protectionfor theunit.
EXT INTLK (EXTERNAL INTERLOCK)
The Ext Intlk connector is provided to allow for a normally open safety interlock switch to control the
energizingof the highvoltage output.
HIGH VOLTAGE ON/OFF
The HIGH VOLTAGE ON and OFF pushbuttons control the high voltage power circuits. The red and green
LEDs provide life long positive indication of the circuit status. The red LED lights when high voltage is
energizedand the greenLED lights whenthe highvoltage isde-energized.
OUTPUT CONTROL
TheOUTPUT control variable transformer adjusts the output voltage.The0-10 markings onthe knobindicate
the low to high setting. The control must be at ZERO (0) to energize the high voltage circuits. The output
control must always be returned to zero at the completion of testing, prior to de-energizing the output
5
VOLTMETER AND RANGE SWITCH
The KILOVOLT METER and associated range switch allows for more accurate output voltage readings. 1-%
precision resistors minimize the need for re-calibration due to aging shift. See Voltmeter Re-calibration in
Section3 for detailson calibration.
CURRENT METER
The CURRENT METER is for accurate secondary load current readings. The range multiplier switch (X1,
X10,X100) allows readingsto betaken aslow as.1mA (5divisions) andup to 100mA.
LOAD RETURN CONNECTOR
The LOAD RETURN connector is for the low side of the test load. It connects to the shielded return lead for
moreaccurate load currentreadings.
RETURN MODE
The RETURN MODE switch allows for accurate secondary load current readings. In the GUARD position, all
ground currents are shunted around the meter. The load must be isolated from ground to use in the GUARD
position. In the GROUND position, the return point is grounded and all currents (load and ground losses) are
metered.
BURN(OPTIONAL)
The BURN toggle is provided for tests when the load has faulted and the insulation must be further scored to
find the problem. The BURN feature will limit current on the output below the overload value and allow for
thoroughmarking ofthefaultarea.
Listofincludedcomponents
Blacktest lead withblack bootfor ground connections.(2 leadsfor PFT-1003)
Ext.Intlk. Jumperplug
Attached20 ft.X-Ray shielded outputcable (50kV andbelow)
Alligatorand hook connectionsfor workingend of outputcable (50kVand below)
20 ft. RG58/U coax returnlead
6
SETTINGUPTHEEQUIPMENT
The setup of this equipment has been minimized by careful consideration of the operator during design. The
PFT Series’ one-piece construction (50kV and below) minimizes misplaced components while allowing for
convenientportability.
1. Select a location for the unit that will allow easy viewing of the meters at a safe distance
fromthe testobject.
2. Be sure that all the controls are off,in their de-energized or fully counterclockwise
position.
3. Secure a ground test lead to the panel. TheGroundpost on the front panel should be
used for that purpose. A black test lead with black boot has been provided for the ground
connection. A second ground lead is provided for two-piece units for the grounding of the high
voltagesection.
4. Insert the EXT INTLK plug into the socket on the panel. The plug may also be
wired to a normally open contact of a safety switch for added protection. Hand-held safety
switchesare available fromHigh Voltageto plug directlyinto theEXT INTLK socket.
5. If applicable, connect the interconnect cable between the control and high
voltage section.
6. Thered booted alligatorclamp onthe output cableis usedto connecttheoutput cableto thetest
object. (50kV and below). Connection of the output toroid on the PFT-1003 high voltage section
to the load is accomplished by using a customer provided test lead or tubing (metallic) between
thetoroid (HVoutput) and testobject.
SECTION
2
7
OperatingtheEquipment
This section provides step-by-step instruction on various test methods. Many facilities have their own
in-house test procedures that should not be superceded by this manual. The purpose of this section
isto explain thecapabilities ofthis test setin real-worldapplications.
AC InsulationTesting
1. Ensure that all the steps listed in Setting up the Equipment have been accomplished. Take
special note to ground the control panel to a solid earth ground using the supplied black test
lead.
2. Select the desired VOLTMETER RANGE forthetest voltagelevel expected.
3. Prior to connecting the output cable (toroid) to the test sample, be sure that the test sample is
de-energized.
4. Connect the output lead to the test sample. Be sure that there is enough clearance to
grounded objects for the expected test voltage. The minimum clearance in air is 10 kV
ac/inch.
5. Return the low side of the test sample to the LOAD RETURN connector using the supplied
shielded return lead. See the GUARD/GROUND explanation (pp. 9,10) for direction on which
modemay beappropriatefor your testingrequirements.
6. Connect the input power cord to a grounded source (See the specification table for unit input
requirements).
7. Depressthe MAIN POWER switchtoenergize thecontrol circuits.
Ce manuel convient aux modèles suivants
1
Table des matières
