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LayerZero Announces UL Approval: 800 A, 600 V Optical Power Transfer Switch Listed to UL 1008 & CSA 22.2 No. 107

Chagrin Falls, Ohio - - LayerZero Power Systems, Inc. is pleased to announce the completion of product safety testing of its 800 A Optical Power Transfer Switch product line. The product was tested to two North American Standards:

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

The product was tested 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) as well as Single Module Redundant (SMR) model families of two-source static transfer switches.

The 800 A model, utilizing six draw-out molded case switches, is a High Energy (Type III, fuseless design), convection cooled system designed to operate in an environment with an ambient temperature range of 0 - 50°C.

Listed Products:



Number of Sources

Redundancy Type


Number of Poles

Number of Wires

800 A

600 V

Two (2)

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

50 Hz or 60 Hz

Three (3)

Three (3) or Four (4) plus Ground

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