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Delta Sama Jaya Sdn Bhd
23G & 23M, DSSB Building,
Jalan Perdana 6/8,
Pandan Perdana,
55300 Kuala Lumpur,

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Substation Voltage Detector

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Substation Voltage Detector Overhead System Voltage Detectors and Accessories

Item Code 


The 275 HP is a high voltage proximity detector.

It has eight voltage detection settings from 240Vac to 275kVac.
The 275 HP consists of an internal pickup sensor plate, a sensitivity selector, and both visual and audio annunciators.
Physical contact with electrical conductors is not necessary when testing for live lines since the 275 HP has a proximity sensor.
It senses the radiated field which surrounds live conductors.

Radiated field strength increases with voltage and decreases quickly with distance or earth shielding.
( Please See “Limitations of use” paragraph in the instruction manual).
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 typical uses of the 275 HP are:

1) Identifying and checking live cables,
2) Finding faults in flexible cables,
3) Tracing live wires,
4) Checking high frequency radiation, and
5) Detecting 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 a 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 H.V. live cables.

The detector must be used in conjunction with a long insulated rod when measuring high voltage (kV).

The 275 HP is a non-contact proximity tester only, and should never come into contact with live high voltage wires.
Checking or proofing the tester is easy.
Switching the sensitivity to 240V and placing the dome against a low voltage live conductor, or rubbing the dome with a cloth or an item of clothing, generates a static DC which triggers the detection circuit.

The light and beeper should go “on” as if a live wire is being detected.


8 voltage settings: 240Vac, 2kV, 6kV, 11kV, 22kV, 33kV, 132kV, and 275kV.
High bright LED visual indication.
Sound indication.
Easy-to-prove method.
Self-test selection.
Use 3 × 1.5V “C” batteries.
High impact nylon casing.
Non-contact work by proximity.
Compatible with most link sticks.
Lightweight, robust, & compact.
Suitable for indoor and outdoor use.
Detects low voltage on any systems.
Easy access to batteries.
No special parts needed.
Meets EN 61326-1  CISPR 11  EN 61000-4-2  
EN 61000-4-3
United States Design Patent : US D474, 705 S
Special ranges are available upon request.

 8 voltage settings  240Vac, 2kV, 6kV, 11kV, 22kV, 
 33kV, 132kV, and 275kV.
 Operating temperature  -15°C~55°C
 Storage temperature  -20°C~65°C
 Humidity  93% R.H. @ 40°C
 Case Height  260mm
 Case Width  96mm
 Weight  Approx. 550g (batteries included)
 Power source  1.5V “C” × 3 Alkaline Batteries
 Safety standard  EN 61326-1
 EN 61000-4-2
 EN 61000-4-3
 EN 55011

Expected test results (Laboratory testing):
Range                     Operated from
240V                       Variable from 80V or depending on the type of source
2kV                          250V
6kV                          500V
11kV                        1000V
22kV                        1500V
33kV                        4000V
132kV                      8000V
275kV                      22kV 

Special voltage ranges available upon request
The maximum detection range can be 500kV


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