HWB-110 Universal Joint High Voltage Detector

HASEGAWA HWB-110 is a universal joint high voltage detector designed for installations in the AC 35 kV – 110 kV range. In the HWB family it is the model that covers the transition from medium voltage to transmission level; 66 kV switchyards and 110 kV networks sit at the centre of this range.

110 kV is a widely used high voltage level in many European networks, and 66 kV is still found in some regional networks and in the private supplies of large industrial sites. The HWB-110 is a practical choice for DSOs, contractors and maintenance companies working at these levels. Manufactured in Japan by Hasegawa Electric, it is supplied by HASEGAWA Türkiye, the official HASEGAWA distributor in Türkiye, to customers across Europe.

Where is it used?

• 66 kV switchyards: checks after the line feeder and busbar disconnectors have been opened, before the earthing switches are closed.
• 110 kV installations: substation commissioning and periodic maintenance.
• HV intakes at industrial sites: steel, cement and chemical plants with their own 66 kV connection.
• Power plant switchyards: connections on the 66 kV or 110 kV side of generator step-up transformers.

On detection, the instrument produces an intermittent sound of 80 dB or more and its red LED flashes; the flash is bright enough to be distinguished at 50,000 lux. The green LED lit on standby switches off by itself after approximately 2 minutes.

HWB-110, HWB-35 or HWB-138?

	HWB-35	HWB-110	HWB-138
Operating voltage (AC)	6 kV – 35 kV	35 kV – 110 kV	66 kV – 138 kV
Detection distance in spec table	5 – 10 cm (at AC 6 kV)	Not stated	5 – 10 cm (at AC 66 kV)
Typical level	20 kV – 33 kV distribution	66 kV and 110 kV	66 kV, 110 kV and 132 kV
Alarm, IP, weight	Same	Same	Same

The HWB-110 and HWB-138 overlap at 66 kV and 110 kV. If you also have 132 kV or 138 kV installations, the HWB-138 is better suited for working with a single instrument; for levels between 35 kV and 66 kV, the HWB-110 provides coverage. 150 kV and 220 kV transmission levels are outside the HWB-110's range.

Technical specifications

• Operating voltage: AC 35 kV – 110 kV, 50/60 Hz
• Audible alarm: intermittent, 80 dB or more
• Visual indication: green standby LED, detection indicated by flashing red LED
• Water resistance: IP45 equivalent
• Impact resistance: pendulum method (IEC 61243-1 impact resistance)
• Operating temperature: −10 °C … +50 °C
• Battery: R03 (1.5 V) × 2; approx. 400 g including batteries
• Accessory: carrying case

Limits of use and safety

Use the HWB-110 only in installations within the 35 kV – 110 kV range; do not use it on 132 kV or 150 kV lines. Bring the detector towards the conductor on an insulating stick of a length and insulation level suited to the high voltage class. Before starting work, confirm the instrument on a point known to be live or with suitable testers. In the switchyard, the permit to work, visual confirmation of disconnector positions and earthing steps must be applied regardless of the detector result, in line with the five safety rules of EN 50110-1; for earthing, see our transmission line earthing sets. General information on model selection is in our voltage detector selection guide.

Why buy from HASEGAWA Türkiye?

• For international 110 kV projects, we support you with quotations and shipping documents
• For your 66 kV installation, we give a clear recommendation between the HWB-110 and HWB-138 based on your list of voltage levels
• We bring the detector together with sticks and earthing equipment in the same quotation