With the full deployment of the urban network transformation, many
power supply bureaus, construction parties, and even design units encountered
110kV XLPE cables for the first time. Due to time constraints and insufficient
experience, many cables failed to pass the withstand voltage test (10kV/ 1min). At present,
most of the outer sheath is made of HDPE sheath material, which has passed the DC
25kV/5min withstand voltage test in the factory, and the leakage current is
as low as tens of μA.
Therefore, most of the defects after laying are caused by external
force damage during laying, including soil filling and cover. Defects after operation
usually include termite bites; water in the grounding box; deterioration of the original
defect; moisture penetration of the bifurcated part of the grounding wire reduces
the insulation resistance, etc., sometimes because the cable is buried too deep or
the surrounding conditions are complicated, so It is very difficult to locate, and
some defects cannot be resolved after many years, leaving hidden dangers to the operation.
The output voltage of the high-voltage cable outer sheath fault
detector is 10KV and below, which fully meets the Chinese national standard GB50150-2006
cable outer sheath withstand voltage test regulations, including the cable
outer sheath handover We test and preventive test suitable for cross-interconnect systems
And the fault location of the outer sheath of the cable. Quickly and accurately find
hidden dangers of 10kv-500kv single-core and three-core high-voltage and ultra-high
voltage cable outer sheath grounding faults and large leakage currents. At the same
time, it can perform 5kv-10kv on high-density polyethylene and polyvinyl chloride cable
outer sheaths, 1 The minute DC withstand voltage test is a special instrument
necessary for the maintenance of cable equipment of 10kv-500kv single-core and
three-core high-voltage and ultra-high voltage cable operation units,
ultra-high voltage cable engineering companies, and various power transmission and
transformation engineering companies.
Main features
1 with over-current, overvoltage, overheating automatic protection
function; 2 It is safer and more reliable with zero start protection; 3 Unique self-discharge design, as long as the high-voltage output
is cut off, the high-voltage itself will be zero; 4 with current and voltage double pointer meter display, intuitive
and clear; 5. One-key switch between positioning mode and withstand voltage
mode, which is convenient and quick; 6 There is no blind spot in the test range; 7. The receiver sensitivity is adjustable, which is more convenient
for positioning; 8 Over-current protection switch function, withstanding voltage
mode and positioning mode are convenient to use.
Technical data
1 Input voltage: 220V (±10%), 50Hz (±2Hz);
2 Output voltage: 0 ~ 10kV (square wave) adjustable;
3 Output current: 0～200mA;
4 Output capacity: 2kVA;
5 Frequency adjustment: Min: 0.2Hz, Max: 5Hz (range adjustable).
Composition of the instrument
1 Cable outer sheath fault locator: a unit for fault location or
withstand voltage test;
2 High-voltage connecting line: connect the high-voltage output end
of the host and the cable core under test;
3 Power cord: the working power cord of the instrument;
4 Receiver: the unit that receives the signal when the fault is
located;
5 fuse: 8A fuse is used, AC220V power supply system backup fuse;
6 Ground wire: instrument ground wire;
7 Receiver clamp: clamp receiver;
8 A sub-rack: used in the step voltage method.
Operation interface introduction
① High voltage output: dedicated DC high voltage output terminal; ② Voltmeter: high voltage output voltage indicating kV meter; ③ Ammeter: output current indicating mA meter; ④ Fuse socket: the place where the fuse of the 220VAC power supply
system is installed; ⑤ Power socket: working power supply of the instrument, 220VAC
connection port; ⑥ Power switch: "I gear" uses AC220V power supply to supply power to
the system; "0 gear" shuts down; ⑦ Frequency adjustment in positioning mode: adjust the pulse output
frequency in positioning mode; ⑧ Voltage adjustment: After starting the device, you must first turn
the knob counterclockwise to the end. When the high voltage start
button light is on, press the start button, and then adjust
clockwise to increase the output high voltage from small to large,
and adjust counterclockwise to make the output high voltage
decrease from large to small; ⑨ High-voltage stop button: When the test is completed or there is
an abnormality, press this button to cut off the high-voltage
output, the high-voltage light will be off, the stop button light
will be on to indicate that there is high-voltage output, and if it
is off, it means that there is no high-voltage output; ⑩ High voltage start button: When the start button light is on, it
means that the voltage output is in the zero position. When the
start button is on, the start button is valid. If the start button
light is not on after turning on the power switch, adjust the
voltage adjustment knob counterclockwise until the light is on.
When the light is on, press this key to start the device and
generate high voltage output; ⑪ Overcurrent protection switch: When the blue light is on, the
overcurrent protection is turned on, and when the blue light is
off, the overcurrent protection is turned off. ⑫ Positioning/withstand voltage function switch button: when the red
light is on, it is the withstand voltage function, and when the
green light is on, it is the positioning function; ⑬ Grounding column: instrument grounding point, safety protection;
1. Micro-ampere meter: indicates the magnitude and direction of the
signal
2. Signal: The input interface of the signal is used to connect the
A-frame or the receiving clamp;
3. Zero adjustment: the reference base of the adjustment signal in
the "Ⅰ" mode; it does not work in the "Ⅱ" mode;
4. Adjustment: adjust the amplitude of the input signal;
5. Gear switch: "0" gear means shutdown state;
"Ⅰ" file can be used in step voltage test mode and receiving clamp
test mode;
It is suitable for the test environment with weak input signal
(with amplifying circuit inside);
“Ⅱ” gear can only be used in step voltage test mode;
It is suitable for test environment with strong input signal (no
amplifier circuit inside);
Onsite test
Company profile
XZH TEST is a professional cable fault detection equipment
manufacturer. We are a young team. Our development philosophy is
humanized management, intelligent cloud-based products, and
internationalized operations. Our development mission is to make
electrical equipment free from undetectable failures.
Since its inception in 2013, our company has grown to become one of
the largest manufacturer of underground cable fault detection
equipment in China. An ISO 9001 and CE certified company, we
produces a broad range of testing equipment.
What we can do
We have the ability to innovate new products and technologies.
We can provide complete system solutions for your project.
We provide online and offline practical and theoretical training.
We provide instrument repair and calibration.
FAQ
1. Are you a trading company or a manufacturer?
We are a professional manufacturer with more than 10 years of
experience. We can strictly control the quality of parts and
finished products.
2. What is the delivery time and inventory?
If our best-selling products are in stock, it will be 5-8 working
days for shipment. But for mass production and customized
production, the time will take 2-4 weeks.
3. What are your payment terms?
Payment ≤ USD 2000, 100% T/T prepayment. Orders over USD 2000 can
be negotiated.
4. How long is your product warranty?
We provide 1 year warranty for the equipment.
5. How do you ensure quality?
The product links include R&D, manufacturing, commissioning and
technical support, following strict and scientific management
principles. Therefore, we can support strong production and R&D
capabilities, and can produce high-quality products at competitive
prices to meet customers' high requirements.
6. What support can I get?
We will provide training support, marketing support, technical
support and supply chain support. You can contact us for more
information.
7. Where is your factory? Can I visit your factory?
We are located in Xi'an, Shaanxi, China. We are close to Xi'an
Xianyang International Airport, which is about 2 and half hours by
plane from Shanghai and Guangzhou. All customers from all over the
world are welcome to visit us.
8. How to become your dealer?
Every company interested in power system instruments can contact us
without hesitation, including website letters, emails, telephones,
etc. We will contact you quickly according to your company
information and cooperation intentions.
