3kV-12kV Indoor CTs LZZBJ9-10E Indoor Economy-Type Epoxy Cast-Resin Current Transformer May 18, 2026 / July 20, 2026 by tianming LZZBJ9-10E indoor economy-type epoxy cast-resin current transformer for 11kV and 12kV class switchgear. Designed for current measurement, energy metering and relay protection, with 800A / 0.2S / 15VA project configuration, 5A or 1A secondary output, 12/42/75kV insulation level and IEC 61869-2 oriented technical documentation. Read more »
Documents Choose the Right ZW-10 CT for 10kV Systems—Cast-Resin, 1A/5A Outputs, Protection Class Certified May 18, 2026 / April 22, 2026 by tianming Introduction The ZW-10 Current Transformer is a critical component in medium-voltage power systems, specifically engineered for reliable and accurate current measurement and protection in 10kV networks. As part of the broader family of instrument transformers, the ZW-10 enables safe interfacing between high-voltage primary circuits and low-voltage secondary instrumentation—such as relays, meters, and monitoring devices—by stepping […] Read more »
Documents Outdoor/Indoor 11kV Cast-Resin Current Transformer LFS-10 – IEC 61869-2 Compliant for current transformer Applications May 18, 2026 / May 2, 2026 by tianming Outdoor/Indoor 11kV Cast-Resin Current Transformer LFS-10 – IEC 61869-2 Compliant Introduction to the LFS-10 Current Transformer The LFS-10 is a high-voltage, cast-resin insulated current transformer (CT) engineered for precise current measurement and robust protection functions in 11kV (IEC standard) or 10kV (domestic system equivalent) alternating current networks. Designed for both indoor switchgear panels and outdoor […] Read more »
Documents CT-10KV 11kV Cast-Resin Current Transformer Selection Guide: IP54 Outdoor Metering & Protection May 18, 2026 / April 22, 2026 by tianming Introduction The CT-10KV current transformer is a critical component in medium-voltage electrical power systems, specifically engineered for applications operating at up to 10 kilovolts (kV). Designed to provide accurate current measurement and reliable protection functions, this instrument transformer isolates high-voltage primary circuits from low-voltage secondary instrumentation, thereby enhancing safety and enabling precise monitoring. Current transformers […] Read more »
Documents MV Switchgear Insulation Coordination: BIL, Withstand Voltage & Clearance Guide (IEC 62271-1, IEEE C37.20) May 18, 2026 by tianming MV Switchgear Insulation Coordination: BIL, Withstand Voltage & Clearance Guide (IEC 62271-1, IEEE C37.20) Meta Description: Comprehensive guide on medium-voltage switchgear insulation coordination. Covers BIL, power-frequency withstand voltage, clearances, creepage distances, and compliance with IEC 62271-1 and IEEE C37.20. Includes selection methodology, testing procedures, and troubleshooting for air-insulated (AIS) and gas-insulated (GIS) switchgear. 1. Introduction […] Read more »
3kV-12kV Indoor CTs LZZBJ6-12Q / LZZJB6-12Q Indoor Epoxy Cast-Resin Current Transformer May 17, 2026 / July 20, 2026 by tianming LZZBJ6-12Q / LZZJB6-12Q indoor epoxy cast-resin current transformer for 10kV, 11kV and 12kV class switchgear. Designed for current measurement, energy metering and relay protection, with 5A or 1A secondary output, 12/42/75kV insulation level, 0.2S/0.5S metering classes and 5P/10P protection options. Read more »
3kV-12kV Indoor CTs LDZB(J)7-10L, TPOL-10 Wall-Through Cast-Resin Current Transformer May 17, 2026 / July 20, 2026 by tianming LDZB(J)7-10L / TPOL-10 Type indoor wall-through epoxy cast-resin current transformer for 11kV and 12kV class switchgear. Designed for TPOL-10 replacement, current measurement, energy metering and relay protection, with 20A–2000A primary range, 1A or 5A secondary output, IEC-oriented insulation design and 0.2S/0.5/5P/10P accuracy options. Read more »
3kV-12kV Indoor CTs LFZBJ7-11kV Indoor Wall-Through Epoxy Cast-Resin Current Transformer May 17, 2026 / July 20, 2026 by tianming LFZBJ7-11kV indoor wall-through epoxy cast-resin current transformer for 11kV and 12kV class switchgear. Designed for busbar-connected current measurement, energy metering and relay protection, with 5A, 1A or 2A secondary output, 12/42/75kV insulation level, standard and L-type variants, and 0.2/0.5/10P protection options. Read more »
Documents Selecting Cast-Resin 0.2S Accuracy CTs: LJ-ZW32-10 for 10kV Metering & Protection Systems May 17, 2026 / April 22, 2026 by tianming Introduction The LJ-ZW32-10 Current Transformer is a high-performance, outdoor-type instrument transformer specifically engineered for accurate current measurement and protection in 10kV medium-voltage power systems. Designed with robust epoxy resin insulation and a compact, maintenance-free structure, this transformer ensures reliable operation under harsh environmental conditions, including high humidity, dust, and temperature fluctuations. Its primary applications include […] Read more »
Documents For Substation Metering & Protection: UNKNOWN 11kV Cast-Resin Current Transformer Compliant with IEC 61869-2 May 17, 2026 / May 2, 2026 by tianming Model DEL-11385 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified Introduction to the DEL-11385 Current Transformer The DEL-11385 is a medium-voltage cast-resin current transformer (CT) engineered for reliable operation in 11kV distribution systems per IEC standards, with compatibility for domestic 10kV networks. Designed in strict compliance with IEC 61869-2 and […] Read more »
Documents 11kV Cast-Resin CT Burden Calculation Guide: IEC 61869 Compliance for Metering & Protection Circuits May 17, 2026 / April 22, 2026 by tianming 5. Burden Calculation The burden of a current transformer (CT) is the total impedance presented to its secondary winding, comprising connected devices (relays, meters, etc.) and wiring resistance. Accurate burden calculation ensures CTs operate within accuracy limits specified by standards such as IEC 61869 or IEEE C57.13. Burden is typically expressed in volt-amperes (VA) at […] Read more »
Documents CT for Motor Protection & VFD Applications: Selection, Transient Response & EMC Guide (IEC 61869-2, IEEE C57.13) May 17, 2026 by tianming CT for Motor Protection & VFD Applications: Selection, Transient Response & EMC Guide (IEC 61869-2, IEEE C57.13) Meta Description: Comprehensive guide on current transformers (CTs) for motor protection and variable frequency drive (VFD) applications. Covers selection, transient response, EMC compliance, and per IEC 61869-2 and IEEE C57.13. Includes selection methodology, wiring practices, and troubleshooting for […] Read more »
