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Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC. Equipment for testing, measuring or monitoring of protective measures - Equipment for insulation fault location in IT systems. Original standard BS EN IEC 61557-9-2025 in PDF full version. Additional info + preview on request
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Safety of transformers, reactors, power supply units and combinations thereof - General requirements and tests. Original standard BS EN IEC 61558-1-2019 in PDF full version. Additional info + preview on request
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Safety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications. Original standard BS EN IEC 61558-2-1-2025 in PDF full version. Additional info + preview on request
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Safety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V. Original standard BS EN IEC 61558-2-10-2024 in PDF full version. Additional info + preview on request
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Safety of transformers, reactors, power supply units and combination thereof - Particular requirements and tests for constant voltage transformers and power supply units for constant voltage. Original standard BS EN IEC 61558-2-12-2025 in PDF full version. Additional info + preview on request
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Safety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications. Original standard BS EN IEC 61558-2-13-2025 in PDF full version. Additional info + preview on request
Document status: Active