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1. PRODUCT INFORMATION
WARNING: Contact with the test leads on this equipment can cause harmful or fatal
electrical shock. Do not touch test leads while a test is in process.
SAFETY AND CAUTION NOTES
1.
Contact with the test leads on this equipment can cause harmful or fatal electrical shock. Do not touch test leads
while a test is in process.
2.
Insure that the unit is properly grounded before proceeding with a test.
3.
Turn the unit off before reaching inside. Damage to the unit and hazardous shock to personnel will result if this
procedure is not followed.
4.
Insure that the equipment to be tested is de-energized and properly isolated.
5.
Insure that the equipment to be tested has been properly grounded using a high voltage grounding stick and rubber
gloves.
6.
Insure that barriers and warning signs are erected in order that personnel in the test area are protected. Use an
assistant operator where appropriate to keep non-essential personnel away from the test site.
7.
When testing cables, the conductors at the distant end should be isolated from each other and taped.
8.
When testing a faulted cable, it is advisable to first make an insulation resistance measurement before proceeding
with the high voltage test.
9.
Use care to avoid damaging the unit during disassembly and re-assembly procedures.
10.
This unit should only be operated by someone familiar with high voltage testing and safety procedures.
DESCRIPTION
The PM15-4A unit is capable of producing regulated voltages as high as 15 kV DC into a variety of insulated electrical
apparatus. The unit will measure leakage current flow through (or insulation resistance levels of) the ground insulation
of the test sample. Leakage current as low as 1nA DC and as high as 4,000 microamperes DC can be read directly
from the unit
’s front panel meter. Insulation resistance values up to 15,000,000 megohms may be read at the maximum
test voltage of 15 kV DC.
The PM15-4A contains an internal discharge circuit which will fully discharge any load within the specifications given on
the unit and test objects (See Specs Page). Under all test conditions, except capacitance measurement, discharges will
complete within 200ms upon ending a test. Discharge of capacitance up to 15µF will take up to 1 second and any load
greater than 15µF requires use of a discharge stick to verify that each load has been fully discharged before
disconnecting leads.
PRODUCT INFORMATION
The unit incorporates an Overcurrent trip which responds after a 15 second delay to de-energize the high voltage power
supply if such a condition is encountered. The delay is necessary to allow for charging time of capacitive loads. The
level of sensitivity at which trip-out will occur is controlled in the Setup screen. The trip setting adjusts from 1µA to
4000µA. Overcurrent trip will automatically shut off HV output. If current trip is not set low enough, no current trip will
occur even if output is shorted. The Overcurrent trip setting adjustment is available for the Insulation Resistance (I.R.),
Polarization Index (P.I.), and Dielectric Absorption Ratio (D.A.R.) tests. Setting Overcurrent trip to the max current of
4000µA (4mA) will effectively bypass the Overcurrent trip feature. The Overcurrent trip can also be bypassed by leaving
the max current field blank.