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AC voltage detector HST-70L
high-voltagemedium-voltagewaterproof

AC voltage detector - HST-70L - Hasegawa Electric Co., Ltd. - high-voltage / medium-voltage / waterproof
AC voltage detector - HST-70L - Hasegawa Electric Co., Ltd. - high-voltage / medium-voltage / waterproof
AC voltage detector - HST-70L - Hasegawa Electric Co., Ltd. - high-voltage / medium-voltage / waterproof - image - 2
AC voltage detector - HST-70L - Hasegawa Electric Co., Ltd. - high-voltage / medium-voltage / waterproof - image - 3
AC voltage detector - HST-70L - Hasegawa Electric Co., Ltd. - high-voltage / medium-voltage / waterproof - image - 4
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Go to the Hasegawa Electric Co., Ltd. website for more information

Characteristics

Detected entity
high-voltage, AC voltage, medium-voltage
Other characteristics
hand-held, waterproof

Description

Product overview
  • Series of voltage detectors for medium to extra-high voltage lines, operable with a hot stick (insulating operating rod).
  • Models cover detection ranges from approx. 3 kV up to 550 kV and include AC-only and AC/DC variants.


Key features (common)
  • FRP insulating stick for lightweight handling and improved operability with hot-stick methods.
  • Tip metal fitting equipped with a shock-absorbing spring to reduce probe-tip impact.
  • Operating rod configurable to longer lengths for extended reach; shortening the rod is not permitted for safety.
  • Positive indication on selected models via flashing high-luminous red LED and intermittent buzzer for visibility and audibility in noisy/bright environments.
  • Waterproof sensor enclosure on specific models to protect against dirt and water ingress.


Available models and main specifications
  • HST-30 — AC detection range: approx. 3 kV to 34.5 kV.
  • HST-70 — AC detection range: approx. 20 kV to 80.5 kV.
  • HST-170 — AC detection range: approx. 60 kV to 195.5 kV.
  • HST-250 — AC detection range: approx. 150 kV to 287.5 kV.
  • HST-30L / HST-70L / HST-W80L — Long-length variants for feeders with the same detection bands as corresponding standard models.
  • HST-20N — Dual AC/DC detection: approx. 3 kV to 25 kV; reduced weight compared to predecessor models.
  • HSR-90N — Wide-range AC/DC detection: approx. 6 kV to 90 kV; positive indication and waterproof sensor housing.
  • HSR-500 — Extra-high voltage AC detector: approx. 250 kV to 550 kV; positive indication and waterproof sensor housing for reliability on transmission lines.
  • WM Series — Pinwheel-type detector: AC detection approx. 6.6 kV to 500 kV; battery-less operation using energy from the detected voltage; pinwheel rotation indicates presence of voltage.


Notes on indications and protection
  • Selected high-voltage models provide both visual (flashing LED) and audible (intermittent buzzer) positive indication to ensure detection in daylight and noisy sites.
  • Fully enclosed waterproof sensors on specific models reduce failure risk from dirt and water, increasing field reliability.


Documentation and variants
  • Model-specific specification sheets and catalogues are available for HST, HST-L, HST-20N, HSR and WM families detailing electrical ranges, dimensions and accessories.


Related product — railway substation earthing hook
  • Model: H型-R — earthing/short-circuit hook for railway substations (DC rated). Clip-type attachment for rapid installation; compact design for confined spaces.
  • Typical rating: DC 1500 V (refer to model list for exact marking).
  • Accessory: storage bag available.


Technical specifications
  • Insulating stick material: FRP (glass-fiber reinforced plastic) for lightweight operability.
  • Tip: metal fitting with shock-absorbing spring.
  • Operating rod: extendable to longer lengths only (shortening prohibited for safety).
  • Detection types: mainly AC; selected models support AC and DC detection (e.g., HST-20N, HSR-90N).
  • Voltage detection ranges: approx. 3 kV up to 550 kV depending on model.
  • Indication: visual (flashing LED) and audible (intermittent buzzer) on selected models.
  • Waterproofing: sensor enclosure provided on specific models to prevent ingress of dirt and water.
  • WM Series: battery-less pinwheel operation using detected voltage energy.

Catalogs

Catalog
Catalog
36 Pages
Go to the Hasegawa Electric Co., Ltd. website for more information

Other Hasegawa Electric Co., Ltd. products

Voltage Detector

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.