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    ISO 9001:2015

    Jiangsu Sieyuan Hertz Instrument
    Transformer Co., Ltd.
    No. 5, West Huimin Road
    Rugao
    Economic Development Zone
    226572
    China
    BSI logo

    Certificate Number: FM 661556
    Scope: The design and manufacture of current transformers (below and include 800kV) , voltage transformers (below and include 1000kV), bushing (below and include 800kV).
    800kV及以下电流互感器、1000kV及以下电压互感器、800kV及以下套管的设计与制造。

    Original Registration Date Effective Date Last Revision Date Expiry Date
    2016-11-07 2022-11-07 2024-09-28 2025-11-06