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

Chagrin Falls, Ohio (March 8, 2004) 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; and
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 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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