TECPEL High Voltage Proximity Detector HVP 275

Product Overview

Description

High Voltage Proximity Detector

HVP-275 Features

-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

• Introduction:
  
  
  
  • 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.
  
  
  
  


• Specifications:
  
  
  
  • Expected test results ( laboratory testing ) :
  
  
  • Range
  
  
  • 240V
  
  
  • 2kV
  
  
  • 6kV
  
  
  • 11kV
  
  
  • 22kV
  
  
  • 33kV
  
  
  • 132kV
  
  
  • 275kV
  
  
  • Typical observation of test results made in the field :
  
  
  • Range
  
  
  • 11kV
  
  
  • 22kV
  
  
  • 33kV
  
  
  • 132kV
  
  
  • 275kV
  
  
  • Operated from
  
  
  • Variable from 80V
  
  
  • or depending on the type of source
  
  
  • 250V
  
  
  • 500V
  
  
  • 1000V
  
  
  • 1500V
  
  
  • 4000V
  
  
  • 8000V
  
  
  • 22kV
  
  
  • 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.
  
  
  
  • Limitations of use :
  
  
  • 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. Limitations of use :
  
  
  • 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.