GDZX ZXPD-100K User manual

ZXPD-100K Partial
Discharge Detector
For Switchgear

ZXPD-100K
Content
Safety Precautions...........................................................................2
Warning................................................................................................3
Operation Notices............................................................................ 5
I. Non-intrusive Partial Discharge Detection........................ 6
1.1 Introduction........................................................................6
1.2 Airborne ultrasonic discharge activity..................... 7
1.3 Airborne high-frequency electromagnetic
discharge activity.....................................................................8
II. Technical Parameters............................................................... 9
III. Structural Layout...................................................................12
3.1 Panel arrangement....................................................... 12
3.2 Sensor configuration.................................................... 14
IV. Operation................................................................................... 16
4.1 Main interface................................................................. 16
4.2 Ultrasonic measurement program..........................19
4.3 TEV measurement program...................................... 21
4.4 UHF measurement program..................................... 25
4.5 Historical data inquiry................................................. 27
V. Specification for TEV Reading............................................. 30
VI. Service Conditions................................................................. 41
VII. Conformance Statement................................................... 41
VIII. After-sales Service............................................................. 42

ZXPD-100K
Safety Precautions
The instrument is used for detecting the partial
discharge sources in MV/HV equipment. Even if no
electric discharge is detected, it is not indicated that
there is no discharge activity in the high-voltage
equipment. The discharge sources usually have a latent
period, and the insulation property may become
ineffective due to other causes than partial discharge. If
significant discharge is detected in the equipment
connected to a medium/high-voltage electric power
system, it is necessary to inform the equipment
maintenance department immediately.

ZXPD-100K
Warning
The product can be used only at the ground potential.
Before starting the probe during test, it is necessary
to ensure that the metal shell of the electric
instrument is grounded.
Please ensure a safety distance between the
high-voltage part and the instrument, the probe, the
operator involved at any time.
Please strictly abide by the safety rule of the electric
power system.
Please do not use the product during lightning.
Please do not use the instrument for measurement
immediately after starting it.
In case of environment change, please press the Left
key to eliminate the environment background value.
Please do not carry out such operations as mechanical
impact, vibration and high-temperature heating for
the equipment and the probe.
Please do not operate the product in an explosive
environment.
In case of any abnormality or use query, please do not
start the instrument but directly contact the
manufacturer or agent.

ZXPD-100K
Implementation of standards
This product performs the following standards:
DL-T 1416-2015 General specification for ultrasonic
partial discharge tester
Q/GDW 11059.1-2013 Guidelines for field application of
partial discharge live test for gas insulated metal enclosed
switchgear
Q/GDW 11060-2013 Guidelines for field application of
transient earth voltage partial discharge live test for AC
metal enclosed switchgear
Q/GDW 11063-2013 Technical specification for
transient earth voltage partial discharge detector

ZXPD-100K
Operation Notices
When using TEV products, it is necessary to abide by the
following rules:
1. The strong electromagnetic interference in the
frequency range from the DC generated by mobile phones,
RF transmitters, video displays and unshielded electronic
equipment to 1 GHZ can influence the reading, so the
product should be placed in a free space at least 1m away
from any conductor surface in order to measure the value
of the local electromagnetic field.
2. Please be careful when using the instrument in a
narrow space, because the reading accuracy may be
influenced when the instrument is near to any other
grounding plane. Therefore, it is necessary to use the
instrument at the place at least 30cm (vertical distance)
away from any metal object.

ZXPD-100K
I. Non-intrusive Partial Discharge Detection
1.1 Introduction
Partial discharge does not cause the electric discharge of
a completely short-circuited electrode. Such discharge
usually has a very small amplitude value, but it will
certainly cause the continuous deterioration of the
property of the insulation layer and finally cause electric
equipment fault.
The non-intrusive
partial discharge
detection, as a
convenient and
simple method, is
used for identifying
the potential insulation faults which may cause power
cutoff or personal injury.
The partial discharge emits energy in following manners:
Electromagnetic energy: radio wave, light and heat;
Sound energy: sound wave and ultrasonic wave;
Gas: ozone and nitric oxide.
The most practical non-intrusive detection technologies

ZXPD-100K
are all based on the detection of the high-frequency
signals and the ultrasonic signals in the electromagnetic
spectrum. The product is an instrument which has
simple operation and is specially developed for detecting
the activities of electromagnetic waves and ultrasonic
waves.
1.2 Airborne ultrasonic discharge activity
The sound radiation in a partial discharge activity
appears in the whole sound spectrum. It is possible to
hear, but this depends on the hearing ability of the
person involved.
The use of the instrument for detecting the ultrasonic
wave in the sound spectrum has following advantages:
compared with human ear, the instrument is more
sensitive and irrelevant to the operators, and runs at the
frequency above voice frequency, and also has stronger
directivity.
The most sensitive detection method is to use the
ultrasonic sensor with the center frequency of 40 ~200
kHz. By virtue of this method, partial discharge activities
can be successfully detected.

ZXPD-100K
1.3 Airborne high-frequency electromagnetic
discharge activity
When occurring in the insulation layer of a high-voltage
switching cabinet, the partial discharge activity can
generate high-frequency electromagnetic wave which
can leak from the switching cabinet to the external
surface through the openings on the metal shell, and
such openings can be the shell gaps or seal washers and
th e ga p s ar o un d ot h e r in s u l at i o n co m p on e nt s .
When propagating to the outside of the switching
cabinet, the electromagnetic wave will generate a
transient voltage on the grounded metal shell. Such
transient earth voltage (TEV) exists in a very short time
in the range from several millivolts to several volts, and
has a rise time of several nanoseconds.
The probe can be placed outside the switching cabinet
through a non-intrusive mode to detect partial discharge
activities.

ZXPD-100K
II. Technical Parameters
Fig. I Product Appearance
1. Applicable scope: the non-intrusive mode is adopted
to detect and locate the partial discharge defects of
the high-voltage electric equipment.
2. sensor configuration
Standard: UA, TEV
Optional: Sensor network for transformer, high
frequency sensor for GIS, sensor for high-voltage
cable, or other senors customized according to user's
requirements.
3. Detection principle: UHF (Ultra High Frequency)
method, UA (Ultrasonic Analysis) method and TEV