Chopped impulse tests, mechanical tests, corrosion resilience evaluation. Why Accessing the IEC 61869-1 Standard is Critical
| Part | Title | Focus | |------|-------|-------| | | General requirements | Core rules for all instrument transformers; covers errors, bandwidth, harmonics, testing | | IEC 61869-2:2012 | Additional requirements for current transformers | Conventional AC CTs | | IEC 61869-3:2011 | Additional requirements for inductive voltage transformers | Conventional inductive VTs | | IEC 61869-4:2013 | Additional requirements for combined transformers | Combined CT/VT units | | IEC 61869-5:2011 | Additional requirements for capacitor voltage transformers | CVTs for HV and EHV | | IEC 61869-6:2016 | Additional general requirements for low-power instrument transformers (LPITs) | Foundation for all LPITs; replaced by IEC 61869-1:2023 | | IEC 61869-7 | (Under development) | Additional requirements for electronic voltage transformers | | IEC 61869-8 | (Under development) | Additional requirements for electronic current transformers | | IEC 61869-9:2016 | Digital interface for instrument transformers | Defines digital communication requirements; based on IEC 61850 | | IEC 61869-10:2017 | Additional requirements for low-power passive current transformers | Passive LPIT current sensors | | IEC 61869-11 | (Under development) | Additional requirements for low-power passive voltage transformers | | IEC 61869-12 | (Under development) | Additional requirements for low-power active transformers | | IEC 61869-13 | (Under development) | Stand-alone merging units (SAMU) | | IEC 61869-14:2018 | Additional requirements for current transformers for DC applications | DCCTs for HVDC and renewables | | IEC 61869-15:2018 | Additional requirements for voltage transformers for DC applications | DCVTs for HVDC and renewables | | IEC 61869-20:2025 | Safety requirements for HV applications | Design, operation, and testing for HV safety | | IEC 61869-99:2022 | Glossary | Standardized terminology for the entire series | | IEC TR 61869-102:2014 | (Technical Report) | Ferroresonance oscillations in substations |
is titled "Instrument transformers – Part 1: General requirements." It serves as the umbrella standard for the entire IEC 61869 series, which replaced the older IEC 60044 series.
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This standard functions as a "master document." It establishes common definitions, environmental limits, structural demands, and testing procedures that apply to all instrument transformers, whether they are traditional inductive types or modern electronic variants. The Evolution from IEC 60044
Checks for immediate insulation defects.
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Transformers must survive physical stresses during shipping, installation, and fault conditions. The standard outlines requirements for: Cantilever strength of primary terminals. Enclosure protection ratings (IP codes). Earthquake-resistant design factors. Wind pressure and ice loading for outdoor units. 4. Thermal and Short-Circuit Capability
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┌─────────────────────────────────┐ │ IEC 61869-1 │ │ General Requirements │ └────────────────┬────────────────┘ │ ┌─────────────────────────┼─────────────────────────┐ ▼ ▼ ▼ IEC 61869-2 IEC 61869-3 IEC 61869-5 Current Transformers Voltage Transformers Capacitor VTs Scope and Key Technical Specifications The Evolution from IEC 60044 Checks for immediate
Must ensure that new instrument transformer models comply with global safety and insulation coordination margins.
: Applies to equipment for applications with a nominal voltage >1.5 kV DC iTeh Standards ⚙️ Key Technical Requirements