Martindale PD440S 440V AC Proving Unit

Martindale PD440S 440V AC Proving Unit

The Martindale PD440S 440V AC Proving Unit provides a fast and reliable way to check the operation of voltage indicators and testers before and after electrical testing. It delivers a nominal 440V AC output and helps support safe working practices in line with electrical safety procedures. Its compact design makes it easy to carry between jobs and testing locations.

Built for professional use, the unit works with a wide range of compatible voltage indicators, multimeters and Drummond test lamps. The colour-coded housing helps users quickly match the proving unit with suitable Martindale equipment. As a result, setup is simple and testing can begin without delay.

Reliable Performance

Designed for dependable operation, the Martindale PD440S 440V AC Proving Unit supplies instant test voltage for both high and low impedance devices. It uses six AA alkaline batteries to provide portable operation without the need for a mains supply. In addition, a high voltage LED and low battery indication help users monitor operating status during use.

The robust overmoulded case helps protect the unit in demanding working environments. An included MG3 magnetic hanger supports easy positioning and convenient storage when not in use. Therefore, the proving unit remains practical for everyday site work.

Designed for Electrical Testing

With an operating temperature range from -10°C to 40°C, the unit can be used across many indoor and outdoor applications. It also supports operation and storage in relative humidity levels up to 70%. This makes the Martindale PD440S 440V AC Proving Unit suitable for a variety of electrical maintenance tasks.

Two different set types are available to suit different user requirements. The standard PD440S model provides a fixed 440V proving output, while alternative set options may include additional accessories depending on the selected package. Consequently, users can choose the most suitable proving unit set for their testing needs.

Key Features

• Provides a nominal 440V AC proving output
• Suitable for voltage indicators and electrical testers
• Compatible with high impedance test equipment
• Compatible with low impedance test equipment
• Works with multimeters and Drummond test lamps
• Colour-coded design for Martindale equipment matching
• High voltage LED indication
• Low battery LED indication
• Robust overmoulded low-profile housing
• Supplied with an MG3 magnetic hanger
• Compact format for easy transport
• Portable battery-powered operation
• Suitable for routine proving checks
• Designed for professional electrical applications

Technical Specifications

Comparison Table

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What’s Included

• Martindale PD440S 440V AC Proving Unit
• MG3 magnetic hanger
• 6 x AA alkaline batteries