Documents Testing JDZ9-10 11kV Cast-Resin Voltage Transformer Compliant with IEC 61869-3 for Substation & Grid Applications May 27, 2026 / April 24, 2026 by tianming JDZ9-10 11kV Cast-Resin Voltage Transformer – IEC 61869-3 Compliant Application Scenarios JDZ9-10 11kV Cast-Resin Voltage Transformer – IEC 61869-3 Compliant Application Scenarios Introduction The JDZ9-10 11kV voltage transformer is a cast-resin insulated instrument transformer engineered to meet the stringent requirements of IEC 61869-3:2011, the international standard governing inductive voltage transformers for measurement and protection applications. […] Read more »
Documents Instrument Transformer Oil Analysis & DGA Guide: Dissolved Gas, Moisture & Furan Testing (IEC 60422, IEEE C57.106) May 27, 2026 by tianming Instrument Transformer Oil Analysis & DGA Guide: Dissolved Gas, Moisture & Furan Testing (IEC 60422, IEEE C57.106) Meta Description: Comprehensive guide on instrument transformer oil analysis and dissolved gas analysis (DGA). Covers sampling, testing, interpretation, moisture, furan, and PCB testing, compliance with IEC 60422 and IEEE C57.106, and practical engineering examples for oil-immersed CTs and […] Read more »
Documents Maintenance Guide for REL-10 11kV Cast-Resin Voltage Transformer Compliant with IEC 61869-3 May 26, 2026 / April 24, 2026 by tianming REL-10 11kV Cast-Resin Voltage Transformer – IEC 61869-3 Compliant Applications REL-10 11kV Cast-Resin Voltage Transformer – Application Scenarios per IEC 61869-3 Introduction The REL-10 11kV cast-resin voltage transformer (VT) is engineered to meet the stringent requirements of IEC 61869-3, the international standard governing instrument transformers for measurement and protection in alternating current systems. Designed specifically […] Read more »
Documents JDZW-35 33kV Cast-Resin Current Transformer for Substation Metering & Protection – IEC 61869-2 Compliant May 26, 2026 / May 2, 2026 by tianming For Substation Metering & Protection: JDZW-35K 11kV Cast-Resin Voltage Transformer per IEC 61869-3 Introduction to the JDZW-35K Voltage Transformer The JDZW-35K is a single-phase, outdoor-rated cast-resin voltage transformer (VT) designed for accurate voltage measurement and reliable protective relay operation in medium-voltage distribution systems operating at 11kV (IEC standard) or 10kV (domestic Chinese system). As a […] Read more »
Documents Outdoor RZL-10 11kV Cast-Resin Voltage Transformer Compliant with IEC 61869-3 for Substation & Grid Use May 26, 2026 / April 24, 2026 by tianming RZL-10 11kV Cast-Resin Voltage Transformer – IEC 61869-3 Compliant Applications RZL-10 11kV Cast-Resin Voltage Transformer – Application Scenarios per IEC 61869-3 Introduction The RZL-10 11kV cast-resin voltage transformer is engineered to meet the stringent requirements of the international standard IEC 61869-3, which governs the performance, safety, and reliability of inductive voltage transformers used in alternating […] Read more »
Documents CT Secondary Circuit Troubleshooting Guide: Open Circuit, Short Circuit & Grounding Faults (IEEE C57.13, IEC 61869-2) May 26, 2026 by tianming CT Secondary Circuit Troubleshooting Guide: Open Circuit, Short Circuit & Grounding Faults (IEEE C57.13, IEC 61869-2) Meta Description: Comprehensive guide on current transformer (CT) secondary circuit troubleshooting. Covers open circuit, short circuit, grounding faults, polarity errors, and burden issues. Includes step-by-step diagnostic procedures, safety precautions, and compliance with IEEE C57.13 and IEC 61869-2 for MV/HV […] Read more »
Documents Indoor ZW-10 11kV Cast-Resin Current Transformer Compliant with IEC 61869-2 for Substation & Industrial Use May 25, 2026 / April 24, 2026 by tianming ZW-10 11kV Cast-Resin Current Transformer – IEC 61869-2 Compliant Application Scenarios ZW-10 11kV Cast-Resin Current Transformer: Application Scenarios Under IEC 61869-2 Introduction The ZW-10 11kV cast-resin current transformer (CT) is engineered to meet the stringent requirements of IEC 61869-2, the international standard governing instrument transformers for alternating current. Designed specifically for use in 11kV medium-voltage […] Read more »
Documents Cast-Resin CT-10KV 11kV Current Transformer | IEC 61869-2 Certified for Substation & Industrial Use May 25, 2026 / April 24, 2026 by tianming CT-10KV 11kV Cast-Resin Current Transformer – IEC 61869-2 Compliant Applications CT-10KV 11kV Cast-Resin Current Transformer – Application Scenarios Under IEC 61869-2 Introduction The CT-10KV 11kV cast-resin current transformer is engineered to meet the stringent requirements of the international standard IEC 61869-2 for instrument transformers. Designed specifically for use in 11kV (IEC-rated) medium-voltage power systems, this […] Read more »
Documents PT Selection for Metering & Revenue Applications: Accuracy, Burden & Compliance Guide (IEC 61869-3, ANSI C57.13) May 25, 2026 by tianming PT Selection for Metering & Revenue Applications: Accuracy, Burden & Compliance Guide (IEC 61869-3, ANSI C57.13) Meta Description: Comprehensive guide on potential transformer (PT) selection for metering and revenue applications. Covers accuracy classes (0.15, 0.3, 0.6), burden calculation, compliance with IEC 61869-3 and ANSI C57.13, and practical engineering examples for utility revenue metering and energy […] Read more »
Documents LJ-ZW32-10 11kV Cast-Resin Current Transformer Compliant with IEC 61869-2 for Power Systems for substation applications May 24, 2026 / April 29, 2026 by tianming JDZ-10 11kV Cast-Resin Voltage Transformer – IEC 61869-3 Compliant Applications JDZ-10 11kV Cast-Resin Voltage Transformer – Application Scenarios under IEC 61869-3 Introduction The JDZ-10 11kV cast-resin voltage transformer is a precision instrument designed for accurate voltage measurement and protection in medium-voltage (MV) electrical distribution networks operating at the standardized IEC system voltage of 11kV. Compliant […] Read more »
Documents SZF-3 11kV Cast-Resin Voltage Transformer: IEC 61869-Compliant for Metering & Protection May 24, 2026 / April 22, 2026 by tianming Introduction The SZF-3 voltage transformer is a critical component in medium-voltage power systems, specifically engineered for reliable and accurate voltage measurement and protection in 10kV networks. As part of the resin-cast, indoor-type instrument transformer family, the SZF-3 offers excellent insulation performance, compact design, and long-term operational stability under varying electrical and environmental conditions. Its primary […] Read more »
Documents CT for Differential Protection: Selection, Matching & Saturation Analysis (IEC 61869-2, IEEE C37.112) May 24, 2026 by tianming CT for Differential Protection: Selection, Matching & Saturation Analysis (IEC 61869-2, IEEE C37.112) Meta Description: Comprehensive guide on current transformer (CT) selection, matching, and saturation analysis for differential protection of transformers, busbars, and generators. Covers IEC 61869-2 and IEEE C37.112 compliance, including knee-point voltage, ratio matching, transient performance, and practical engineering examples. 1. Introduction Differential […] Read more »
