AC-30B Mains Frequency Spark Tester

The AC-30B is ideal for applications testing larger wires, multi-conductor cables, or whenever more than 15kV is required. The A-30B meets a variety of common industrial specifications including UL 2556, UL 1581, and IEC 62230 (when properly applied and using an application appropriate electrode).

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Spec Sheet - English

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Technical Specifications

Major Features:

  • Pinhole/Bare Wire Differentiation

  • Flexible Communication Options

  • Reliability

  • Ease of Use



Test Voltage Range

1-30kV RMS

Test Frequency

Commercial Frequency (Typically 50/60 Hz depending on location)

Voltage Display

3-digit LED display

Accuracy 2% of reading

Fault Indication

3-digit LED counter

Amber Fault Indicating LED

Operating Modes

Continuous high voltage / Remove voltage on fault

Momentary relay closure on fault / latched relay closure on fault until reset

Power Requirements

100-240VAC 49-61Hz

Power supply is self-adjusting

Product Diameter (round wire/cable)

Up to 8 inches

Electrode Types

Bead chain

Bead Chain Electrode Lengths

6 to 36 inches

Compliant UL line speed with a standard 6-inch electrode at 60 Hz

Up to 200 feet per minute

Maximum compliant UL line speed with a 36-inch electrode at 60 Hz

Up to 1,200 feet per minute

Compliant IEC line speed with a standard 6-inch electrode at 60 Hz

Up to 600 feet per minute

Maximum IEC compliant line speed with a 36-inch electrode  

Up to 3,600 feet per minute.  

Output Power

6mA Resistive 

Detection Sensitivity

Conforms to IEC62230

Relay Outputs

4 x User-configurable relays may be tasked to any desired function.

Pinhole Alarm, Bare Wire Alarm, Voltage Watchdog, Cover Open, Pinhole/Bare Wire Count Limits etc.

Standard Communications

Modbus RTU via RS-485, Analog

Optional Communications (with purchase of accessory communication card)

Ethernet IP, Modbus TCP, Profibus, Pofinet, DeviceNET


Tel: 860-669-7548 | Fax: 860-669-3825



Mon - Fri: 8am - 4:30pm EST


A pioneer in pinhole detection technology, The Clinton Instrument Company remains at the forefront of research and development in this specialized area.



  • Spark Testing

  • Pinhole detection

  • Dielectric Testing

  • Leak testing

  • High Voltage Testing

  • High Frequency Sine Wave Testing

  • Cable Fault Location

  • High Speed Leak Detection

Clinton Instrument Company

295 E. Main St. 

Clinton, CT 06413 USA

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