True Phase Identification System

Our vision has always been to create a phase identification system that exceeds any of today’s industry quality, safety and efficiency requirements. SPI-III’s unique design consists of a wireless bi-module combo that is stunningly easy to configure and operate. With many advancements and innovations, SPI-III will be more helpful than ever before, enabling field applications such as identification of A-B-C electrical phases from all 50 and 60 Hz networks, switchgear phase concordance (matching), phase rotation, system paralleling, underground phasing applications and more.



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  • True phasing for all applications at any voltage
  • Live true phasing
  • Reading accuracy of ± 1°
  • GPS satellite network synchronization
  • Fast setup, ready to operate in seconds
  • No network de-energisation required
  • All-day battery life
  • Encrypted and robust communication technology
  • Underground time-delayed phase id mode
  • Local or cloud-based deployment

Please contact: support@ndbtech.com



Hook Type Electrode

Hook type electrode for SPI-III measurement module. Allows for direct contact phasing on overhead power lines.

Part number: ACC-035

Diameter: 60mm

Y type Electrode

Y type electrode for SPI-III measurement module. Allows for direct contact phasing on overhead power lines.

Part number: ACC-036

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Armband for SPI-III display module. Allows the operator to hold the display module hands-free while performing phasing.

Part number: ACC-108

Compatible with SPI-III display module.

Field Option Kit

Optional field accessory kit for SPI-III phasing system. Includes low voltage accessories: Crocodile clips, multimeter type probes with retractable tips, banana plus and silicone test leads.


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Hard Shell Case

Practical hard-shell case for SPI-III field kit. Allows to safely transport your SPI-III system.

Part number: BOX-107

Dimensions: 363 x 284 x 119 mm (14.29 x 11.19 x 4.7 inches)

Holding Strap Kit

Optional field magnetic strap with eyebolt. Allows the operator to magnetically hold the SPI-III measurement module on any ferro-magnetic surface while performing phasing.

Part number: SPI-III-MAG

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Contact us

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Business days

Monday to Friday, 8:00 to 17:00 

Eastern Time Canada

ndb Technologies

111-1405 ave. St-Jean-Baptiste

Quebec city, Qc

G2E 5K2, Canada

Contact us

1 (418) 877 7787