HVP-275 High Voltage Proximity Detector / Tester Product ID: HVP-275
The TECPEL HVP-275 is a high voltage proximity detector.It has eight voltage detection settings from 240Vac to 275kVac. The HVP-275 consists of an internal pickup sensor plate, a sensitivity selector, a visual and a sound annunciator. With the HVP-275, physical contact with electrical conductors is not necessary when
testing for live lines. This tester works by proximity. Its sensor senses the radiated field which surrounds live conductors. Radiated field strength increases with voltage and decreases quickly with distance or earth shielding. The radiated field from a cable of closely bunched conductors supplied by three phase power tends to cancel (See “Limitations of use”paragraph). Detecting distance of a 250Vac single live wire is approximately 10cm. With a bunched
neutral and earth cable, as in a flexible cable, the distance is reduced to 5cm.
Some of the typical uses are : identify and check live cables; find fault in flexible cables; check earth equipment; service neon lightning; trace live wires; check high frequency radiation; detect residual or induced voltages. For example, faults in damaged flexible cables are found by applying low voltage to each conductor. Earthing the remainder and moving the tester along the cable until the change in condition is obtained. (Flexible cables which are used in mining
and building industries, are readily repairable when the break in the cable is located.) When testing for high voltage, the rotary switch (attenuator) is used to identify and differentiate various HV live cables. The tester must be used in conjunction with a long and insulating rod when measuring high voltage (kV).
However, the HVP-275 is a non-contact tester and it is advised that the tester should never come into contact with cables (kV) as this tester is merely a non-contact AC proximity tester. Checking or proofing the tester is easy. Switch the sensitivity to 240V and place the dome against a low voltage live conductor or rub the dome with a cloth or against an item of clothing as this generates a static DC which triggers the detection of circuit. The light and beeper should go “on” as if a live wire is being approached. Approaching the dome near a computer screen or a TV screen should also trigger the tester while on the 240V selection. The power consumption of the 275HP is very low, and the tester should always be tested as described above before using it.
- Expected test results ( laboratory testing ) :
- Typical observation of test results made in the field :
- Operated from
- Variable from 80V
- or depending on the type of source
- Min. Detection MDV as % of
- Voltage (MDV) Line Voltage
- 1kV 9.1%
- 2kV 9.1%
- 3.1kV 9.4%
- 12.5kV 9.5%
- 22.5kV 8.2%
- Limitation of usage:
- It is recommended that the 275HP is not used in HV yards of mixed voltages.
- In the presence of mixed voltages, the tester can become unreliable.
- Problems can arise when the tertiary circuit of a 275/133/11kV transformer is
- tested. The electric field of the HV and MV bus bars can trigger the detector when
- it is about 3m above the ground. This is common with most of the electric field
- voltage detectors, and the users should be aware of it. The tester can pick up
- adjacent circuit to the one being tested and indicate the wrong information to the user.
‧ Sealed by "" O"" Ring.
‧ 8 voltage settings: 240Vac, 2kV, 6kV, 11kV, 22kV, 33kV, 132kV, and 275kV
‧ High bright LEDs visual indication
‧ Sound indication
‧ Easy-to-proov method
‧ Self-test selection
‧ Use 3 x 1.5V “C” batteries
‧ High impact nylon casing
‧ Non-contact work by proximity
‧ Compatible with most link sticks
‧ Light weight, robust, & compact
‧ Suitable for indoor and outdoor use
‧ Detect low voltage on any systems
‧ Easy access to batteries
‧ No special parts needed
‧ Three-year warranty
‧ Simple and efficient to use
Q & A:
We already bought HVP-275 form you. We sold to customer and they found there is no range for 69 and 115 kV. In case of they want to use it with 69 kV & 115 kV, is it work? If it can be used, what range they should select between 33 and 132 kV ?
If the customer sold HVP-275 already. They can select the range of 33 kV to detect 69 kV and 115 kV, it's ok to do that.The range of 33 kV can detect voltages that's greater than 33 kV. It's not only for the voltage 33 kV.You can identify the strength of the voltages according to the distance. The higher the voltage, the longer the detection distance. This is a HV proximity detector
Q & A:
Why the TEST REPORT OF HVP 275”, in last line of the report “Distance” is mentioned as “5cm” while in all other lines distance is 10cm.?
This report form is correct. Because of the high-pressure test bench up to 100kV, 132kV at 10cm response measured voltage is about 32.4kV, but when
measured 275kV, we are concerned that the response voltage close to the limit of this
high-pressure test bench, test bench and cause damage,
so the next best thing would shorten the distance to measure, in order to protect the safety of the test station.
Q & A:
how do you test 275 KV , using a 100 KV generator.
Any special setup？
This HVP-275 is a high voltage proximity detector.
The working principle is the same for all ranges.
Different ranges have different resistors to control the sensing current.
Our employees check all the resistors for these ranges to make sure this PCB can work correctly, especially for high voltage ranges.
So even at the ranges above 100 kV, the HVP-275 still can work properly.