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    ISO 9001:2015

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

    Certificate Number: FM 661556
    Scope: The design and manufacture of current transformers (below and include 550kV), voltage transformers (below and include 1100kV), bushing (below and include 800kV).
    550kV及以下电流互感器、1100kV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 2025-11-07 2025-09-08 2028-11-06