Delta PQC Series, Руководство пользователя

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(50kvar Modules)
(Figure 3-26: Module End and Installation Holes on the Side)
3.6 Load Current Detection for CT Installation and Wiring
3.6.1 CT Selection
1. The appropriate rated ratio of primary to secondary current shall be determined. The
pri mary current is recommended to be 1.5*In (the actual rated current).
2. The rated voltage is more than or equal to the system voltage.
3. The selection for secondary current shall be 5A or 1A, 5A is suggested.
4. CT accuracy shall be class 0.5 or 1.0, class 0.5 is suggested
5. The nominal secondary capacity (rated load) of the CT shall meet the requirement of
secondary impedance ( ≥ 10VA when the secondary current is 5A). The capacity and the
maximum one-way wiring length from the CT to the SVG shall be calculated according
to the following formula:
𝐿
𝑃 𝑃 1
𝐼
∙
𝑆
𝜌
∙
1
2
Use four M4 screws
to fix the module
and the customized
cabinet.
Use four M6 screws to fix the module
and the customized cabinet.