HSE-7G Medium / Low Voltage Detector

HASEGAWA HSE-7G is a handheld medium / low voltage detector for networks from low voltage up to 7 kV. Operating from AC 60 V – 7000 V, it weighs approx. 55 g and is easily carried in a pocket. It is recommended in particular for telecom crews working on utility poles and for distribution network maintenance staff.

The HSE-7G's threshold values are defined as 60 V for low voltage and 400 V for high voltage on bare conductors; on insulated conductors such as φ5 mm OE wire it responds at 3000 V. HASEGAWA Türkiye, the official distributor in Türkiye, supplies this Japanese-made model as a genuine HASEGAWA product with a commercial invoice.

Where is it used?

• Joint-use poles: For crews installing fibre-optic or copper telecom cable to check whether stray voltage is present on the messenger wire, tensioning hardware or metal fittings on the pole.
• Low-voltage overhead lines: Checking for voltage by touching bare points on service connections and LV network conductors.
• Working near MV distribution lines: Confirming whether a conductor is live on systems up to 7 kV.
• Street cabinets and service points: Thanks to its light weight, as a first-check tool that always stays in the crew's bag.

For telecom crews, the main risk when sharing a pole with power conductors is voltage passing to metal fittings from a line with damaged insulation. The HSE-7G makes these checks possible in the palm of the hand, without a long hot stick.

HSE-7G or HSF-11?

	HSE-7G	HSF-11
Operating voltage	AC 60 V – 7000 V	AC 80 V – 11.4 kV
Low-voltage threshold	60 V on bare conductor	65 V ± 15 V on bare conductor
High-voltage threshold	400 V on bare conductor	2000 V ± 200 V on bare conductor
Insulated conductor	3000 V through φ5 mm OE wire	Bare conductors only
Dielectric strength	20 kV, 1 minute	20 kV, 1 minute
Battery	2 × LR44 (1.5 V)	2 × R03 (1.5 V)
Weight	Approx. 55 g	Approx. 150 g

If you need a lightweight instrument for networks up to 7 kV that can also respond through insulated cable, the HSE-7G is suitable. For bare conductors up to 11.4 kV, the HSF-11, with defined visual and audible indication, is the better choice.

Technical specifications

• Operating voltage: AC 60 V – 7000 V, 50/60 Hz
• Threshold voltage: 60 V for low voltage, 400 V for high voltage (contact with bare conductor)
• Insulated conductor: 3000 V through φ5 mm OE wire
• Dielectric strength: 20 kV for 1 minute between contact tip and handle
• Leakage current: 0.5 mA or less in the withstand test
• Battery: 2 × LR44 (1.5 V); 3 hours continuous operation, approx. 2 years on standby
• Operating temperature: −10 °C … +40 °C; weight approx. 55 g

Limits of use and safety

The HSE-7G is a handheld instrument, so the distance to the conductor is limited by the user's reach. Medium-voltage conductors must only be approached by authorised personnel, in line with the minimum approach distances set by applicable regulations and company procedures. For work that requires reach, use hot stick high voltage detectors. Insulating gloves and suitable PPE are mandatory during work. Before use, confirm that the detector works correctly with a suitable voltage detector tester or a known live source. It must not be used on systems above 7000 V.

Why buy from HASEGAWA Türkiye?

• Advice on choosing a model suited to pole-top use for telecom and infrastructure crews
• Comparative recommendations across the 7 kV, 11.4 kV and 36 kV classes for your network
• A single-line bulk quotation with a commercial invoice for all your field crews