Documents CT-35K 33kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified April 10, 2026 / May 2, 2026 by tianming CT-35K 33kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified Introduction to the CT-35K Current Transformer The CT-35K is a high-reliability, cast-resin insulated current transformer engineered for accurate metering and dependable protection in medium-voltage electrical systems rated at 33 kV (IEC standard), corresponding to domestic 35 kV distribution networks. Designed in […] Read more »
Documents UTF-8 11kV Cast-Resin CT Transformer: IEC 61869-2 Compliant for Metering & Protection for current transformer Applicatio April 9, 2026 / May 2, 2026 by tianming Introduction to the UTF-8 Current Transformer The UTF-8 is a high-accuracy, cast-resin insulated current transformer (CT) engineered for reliable operation in 11kV (IEC standard) or 10kV (domestic equivalent) medium-voltage networks. Designed in strict accordance with IEC 61869-2 and GB/T 20840.2, this instrument transformer serves critical roles in both metering and protective relaying applications across utility […] Read more »
Documents Current Transformer Testing & Calibration Guide: Routine, Type, and Field Commissioning Tests per IEC 61869 & IEEE C57.13 April 7, 2026 / May 2, 2026 by tianming Current Transformer Testing & Calibration Guide: Routine, Type, and Field Commissioning Tests per IEC 61869 & IEEE C57.13 Meta Description: Comprehensive guide on current transformer testing and calibration procedures. Covers factory type tests, routine tests, field commissioning, excitation curve measurement, ratio verification, and compliance with IEC 61869-2 and IEEE C57.13 standards. 1. Introduction Current transformer […] Read more »
Documents UTF-8 11kV Cast-Resin CT Transformer: IEC 61869-2 Compliant for Metering & Protection for current transformer Applicatio April 7, 2026 / May 2, 2026 by tianming Introduction to the UTF-8 Current Transformer The UTF-8 is a 11kV (IEC-rated) cast-resin current transformer engineered for high-reliability metering and protection applications in medium-voltage power systems. Designed in strict compliance with IEC 61869-2 and GB/T 20840.2, it serves as a critical interface between primary conductors and secondary instrumentation, enabling accurate current measurement while ensuring galvanic […] Read more »
Documents UNKNOWN 11kV Cast-Resin Current Transformer Compliant with IEC 61869-2 for Metering & Protection for substation appli… April 6, 2026 / May 2, 2026 by tianming UNKNOWN 11kV Cast-Resin Voltage Transformer for Substation Metering and Protection – IEC 61869-3 Certified Introduction to the UNKNOWN Voltage Transformer The UNKNOWN 11kV cast-resin voltage transformer (VT) is engineered for high-reliability metering and protective relaying applications in medium-voltage distribution networks. Designed in strict compliance with IEC 61869-3 and GB/T 20840.3, this instrument transformer leverages advanced […] Read more »
Documents UTF-8 11kV Cast-Resin CT Transformer: IEC 61869-2 Compliant for Metering & Protection for current transformer Applicatio April 5, 2026 / May 2, 2026 by tianming Introduction to the UTF-8 Current Transformer The UTF-8 is a high-reliability, cast-resin insulated current transformer (CT) engineered for accurate current measurement and protective relaying in medium-voltage power systems operating at 11kV (IEC standard) or 10kV (domestic Chinese grid). Designed in strict compliance with IEC 61869-2 and GB/T 20840.2, this instrument transformer leverages advanced vacuum pressure […] Read more »
Documents Capacitive Voltage Transformer (CVT): Working Principle, Structure, Error Analysis & Selection Guide (IEC 61869-3) April 4, 2026 / May 2, 2026 by tianming Capacitive Voltage Transformer (CVT): Working Principle, Structure, Error Analysis & Selection Guide (IEC 61869-3) Meta Description: Comprehensive guide on Capacitive Voltage Transformers (CVT). Covers working principle, capacitor divider design, electromagnetic unit, frequency response, accuracy classes, transient performance, and selection per IEC 61869-3 and IEEE C57.13. Includes error analysis, damping circuits, and field testing procedures. 1. […] Read more »
Documents UTF-8 33kV Cast-Resin VT Transformer: IEC 61869-3 Compliant for Metering & Protection for voltage transformer Applicatio April 3, 2026 / May 2, 2026 by tianming Introduction to the UTF-8 Voltage Transformer The UTF-8 is a single-phase, indoor/outdoor-rated cast-resin voltage transformer (VT) engineered for high-reliability operation in 33kV transmission and distribution networks. Designed in strict accordance with IEC 61869-3 and GB/T 20840.3, it serves critical roles in metering, protection, and monitoring systems within modern substations. Unlike legacy oil-immersed designs, the UTF-8 […] Read more »
Documents LJ-ZW32-10 11kV Cast-Resin Current Transformer for Precision Metering & Protection – IEC 61869-2 Certified April 2, 2026 / April 28, 2026 by tianming LJ-ZW32-10 current transformer for 11kV applications. Routine testing procedures, maintenance schedule, and troubleshooting guide. Read more »
Documents Current Transformer Secondary Wiring & Burden Calculation Guide: Circuit Design, Voltage Drop & Compliance per IEC 61869-2 April 1, 2026 / May 2, 2026 by tianming Current Transformer Secondary Wiring & Burden Calculation Guide: Circuit Design, Voltage Drop & Compliance per IEC 61869-2 Meta Description: Comprehensive guide on current transformer secondary wiring design and burden calculation. Covers cable sizing, voltage drop analysis, burden matching, multi-point grounding hazards, terminal connection standards, and compliance with IEC 61869-2 and IEEE C57.13. Includes practical calculation […] Read more »
Documents CT-10K 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified April 1, 2026 / May 2, 2026 by tianming CT-10K 11kV Cast-Resin Current Transformer for Substati […] Read more »
Documents UTF-8 11kV Cast-Resin VT Transformer: IEC 61869-3 Compliant for Metering & Protection for voltage transformer Applicatio April 1, 2026 / May 2, 2026 by tianming Introduction to the UTF-8 Voltage Transformer The UTF-8 is a single-phase, indoor/outdoor-rated cast-resin voltage transformer (VT) engineered for accurate voltage measurement and reliable protective relay operation in medium-voltage networks operating at 11kV (IEC standard) or 10kV (domestic Chinese system). Designed in strict compliance with IEC 61869-3 and GB/T 20840.3, this instrument transformer leverages advanced vacuum […] Read more »
