HASEGAWA HSS-25B1 Telescopic Medium/Low-Voltage Detector | AC 80–25,000 V, extended 815 mm, audible and visual indication, approx. 140 g

HASEGAWA HSS-25B1 Telescopic Medium/Low-Voltage Detector: AC 80–25,000 V

Overview

The HSS-25B1 is a telescopic medium/low-voltage detector from Hasegawa Electric and the standard model for medium voltage. With the insulating pole extended, voltage can be detected farther from live parts; in the retracted state, low voltage can be detected by holding the nameplate section, but low voltage cannot be detected when extended. It has a test switch, indicator lamp and buzzer, and comes with a storage pouch. The HSS-36B1, with a range extended to AC 80–36,000 V, is available on request.

Key Specifications

• Operating voltage range: AC 80V–25kV (80–25,000 V)
• Threshold voltage (to ground): Low voltage: bare wire AC 80 V or less (holding the nameplate section); high voltage: bare wire (φ3 mm) AC 250V±50V, OC covered wire (φ5 mm) AC 1000V±200V (holding the grip)
• Frequency: 50 / 60 Hz
• Withstand voltage: Between detection tip and grip: 50 kVAC for 1 min when extended; between detection tip and nameplate section: 4 kVAC for 1 min; leakage current 0.1 mA or less
• Battery and life: 2 × LR44 (1.5 V); 8 h continuous operation, approx. 1.5 years unused
• Dimensions: Extended 815 ±30 mm; retracted 215 ±10 mm
• Operating temperature and weight: -10 to 50 ℃; approx. 140 g

Applications

• Confirming de-energization and identifying live parts before servicing distribution equipment.
• Voltage detection on medium-voltage distribution lines and low-voltage equipment.

Specifications per the HASEGAWA English website Voltage Detector (High) page specification table and HSS-25B1 catalog page (hasegawa-elec.co.jp, retrieved 2026-10-23).