Product Features
Isolation Voltage and Partial Discharge Testing.
The HT 9460 and HT 9464 test systems detect resistive and capacitive
leakage. The HT 9464 also measures partial discharge and
complies to the UL and VDE 0883 specifications up to 7 KVA (9.99
kV peak).
Partial Discharge
Detection. Partial discharge activity indicates the presence
of a physical insulation defect that can lead to high leakage and
failures after the device is put into service. The HT 9464 is unique
in its ability to detect partial discharge with a sensitivity of
less than 5 pico-coulombs (pC) as specified In the VDE-0884 specification.
An optional calibrator allows for 1 to 9 pico-coulomb repeatable
calibration.
Non-Destructive
Testing. Isolation voltage testing can often destroy a device
due to the discharge of stored energy. The HT 9460 and HT 9464 produces
negligible stored energy and features a current limiting design
that prevents additional damage to failed devices. Voltages are
applied to the DUT at the AC voltage crossings. If a failure is
detected a solid-state switch removes the test voltage within 0.1
milliseconds. The HT 9464 adds the unique advantage of testing for
partial discharge non-destructively.
Complete
Operator Control. Front Panel control are provided to set test
limits for device leakage, high voltage/low limit thresholds, and
for the 9464 partial discharge. A digital panel meter displays actual
device voltage as peak or AC, source voltage, or leakage current.
The front panel also displays PASS/FAIL information.
Manual Configuration.
Both the HT 9460 and HT 9464 are available in manual and auto handler
models. The manual version is ideal for incoming inspection, sampling
and laboratory analysis of devices or assemblies where high throughput
is not a priority.
Auto Handler
Configuration. For production applications the tester can be
fully integrated with most automatic handlers. Handlers can be programmed
to allow any output bin to be assigned to any sort class. Automatic
re-test indicators are also included. Typical throughput is 2,000
to 2,400 units per hour with a one second specified test time.
Easy
Safe Operation. The HT 9460 and HT 9464 series have been designed
for simple test operation. Safety locks protect the operator from
contact with the high-test voltages. Setting the desired test voltage
is aided by a 3-1/2 digit display of the actual voltage. A transparent
hinged cover prevents inadvertent operation of the adjustment knob.
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Fig.
3. Basic 9464 Auto handler Configuration
This
includes: High Voltage Test Head, Controller and Line Filter. The
controller front panel is reversible to allow for either horizontal
or vertical installation.
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Fig. 4. Options
Shown above are the options available for the basic HT 9460 or
HT 9464 auto handler configuration: 1. PDC 710V
Partial Discharge Calibrator; 2. Opto-isolated handler or
robotics interface; and 3. Verification Stand. The Verification
Stand is used in conjunction with the High Voltage Test Head to
calibrate/set-up the system off-line in a simulated environment
without the handler interfaced. The opto-isolator is only required
for handlers that do not have their own optically isolated buss.
The PDC 710V injects a selected known charge (1 to 9 pC) into
the Device Under Test (DUT) contacts. This calibration technique
simulates an actual devices partial discharge, which allows all
stray capacitances to be calibrated.
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