HLA-1A Voltage Detector Tester

HASEGAWA HLA-1A is a compact voltage detector tester used to confirm in the field that a voltage detector is working. It has two separate output terminals: the H terminal delivers an AC 400 V test voltage and the L terminal AC 100 V. If the detector gives its warning when brought close to the relevant terminal, it is ready for use.

Weighing approximately 430 g and measuring 65 × 120 × 40 mm, it is the smallest and lightest model in the HLA series and fits easily in a tool bag or a vehicle compartment. The HLA-1A runs on four LR03 (AAA) batteries, is made in Japan and is supplied as a genuine HASEGAWA product by the official distributor in Türkiye, with a commercial invoice.

Where is it used?

When a voltage detector stays silent there are two possibilities: the circuit is dead, or the detector is not working. The HLA-1A lets you rule out the second possibility in seconds, on site:

• Electrical maintenance teams working on panels, distribution boards and control circuits
• Start-of-shift equipment checks in factory and plant maintenance departments
• Contractors verifying their detector before starting work
• Periodic equipment inspections by health and safety teams

The two output levels let you see how a low-threshold detector responds at both the lower and the upper end of its range. The 55 Hz ± 10 Hz output frequency provides a test signal suited to the sensing circuit of mains-frequency detectors.

HLA-1A or HLA-2G?

	HLA-1A	HLA-2G	HLA-3
Output voltage	H: AC 400 V, L: AC 100 V	H: AC 1200 V, L: AC 70 V	AC 4000 V ± 15%
Output frequency	55 Hz ± 10 Hz	55 Hz ± 10%	55 Hz ± 10 Hz
Short-circuit current	0.5 mA or less	0.5 mA or less	0.5 mA or less
Battery	4 × LR03 (1.5 V)	2 × 9 V (6R61 or 6F22)	2 × 9 V (6LR61 or 6LF22)
Total operating time	Approx. 1 hour	Approx. 2 hours	Approx. 2 hours
Operating temperature	−10 °C … +50 °C	0 °C … +50 °C	0 °C … +50 °C
Dimensions	65 × 120 × 40 mm	80 × 150 × 50 mm	100 × 200 × 70 mm
Weight	430 g	700 g	Approx. 1200 g (without batteries)

The deciding factor is the starting (threshold) voltage of the detector to be tested. The HLA-1A is sufficient for low-voltage and low-threshold detectors. For higher-threshold detectors use the HLA-2G with 1200 V output, and for medium- and high-voltage detectors that need a 4000 V test, the HLA-3. DC detectors have their own model, the HLA-N2 DC.

Technical specifications

• Output voltage: H terminal AC 400 V, L terminal AC 100 V
• Output frequency: 55 Hz ± 10 Hz
• Short-circuit current: 0.5 mA or less
• Operating temperature: −10 °C … +50 °C
• Battery: 4 × LR03 (1.5 V); total operating time approx. 1 hour
• Dimensions: 65 × 120 × 40 mm
• Weight: 430 g

Limits of use and safety

The HLA-1A only shows whether the detector responds; it does not prove that a circuit is dead. The correct sequence is to test the detector on the HLA-1A first, then check the circuit for voltage, and test the detector again when the job is finished. Although the short-circuit current is limited to 0.5 mA or less, do not touch the terminals with bare hands; hold the detector by its own handle.

As the total operating time is approximately 1 hour, do not leave the unit switched on unnecessarily, and keep spare LR03 batteries to hand. For compatible detectors see the low-voltage detectors category; for why test frequency matters, read our article on periodic inspection.

Why buy from HASEGAWA Türkiye?

• We confirm whether the HLA-1A is suitable for the threshold of the detector you use
• Complete set quotations for teams ordering detectors and testers together
• Quantity-based supply with a commercial invoice for multi-site maintenance teams