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LayerZero Completes 150-600 A OPTS Listing to UL 1008 & CSA

Chagrin Falls, Ohio - - LayerZero Power Systems, Inc. is pleased to announce the successful completion of product safety testing for its 150-600 A Optical Power Transfer Switch (OPTS) product line. The product has been tested to two North American Standards:

  1. Underwriters' Laboratories (UL) Standard 1008
  2. Canadian Safety Administration (CSA) Standard CSA 22.2 No. 107

The testing was conducted by ETL, a division of Intertek and an OSHA-approved Nationally Recognized Testing Laboratory (NRTL). The listed product line includes LayerZero's Triple Modular Redundant (TMR) and Single Module Redundant (SMR) models for two-source and three-source static transfer switches.

Listed Products:



Number of Sources

Redundancy Type


Number of Poles

Number of Wires

150 A

208V; 380V; 400 V; 415V; or 480V

Two (2) or Three (3)

Triple Modular Redundant (TMR); or Single Modular Redundant (SMR)

50 Hz or 60 Hz

Three (3)

Three (3) or Four (4) plus Ground

250 A

400 A

600 A

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