3kV-12kV Indoor CTs LZZBJ6-12Q / LZZJB6-12Q Indoor Epoxy Cast-Resin Current Transformer May 17, 2026 / May 17, 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 / May 17, 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 / May 17, 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 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 »
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 »
3kV-12kV Indoor CTs LAJ-10 / LFZBJ-10 Wall-Through Epoxy Cast-Resin Current Transformer May 16, 2026 / May 16, 2026 by tianming Product Overview The LAJ-10 / LFZBJ-10 current transformer is an indoor epoxy cast-resin wall-through current transformer designed for medium-voltage switchgear applications. These two model references can be combined into one product family because both are used for current measurement, electric energy metering, and relay protection in indoor AC power systems. For international project documentation, the […] Read more »
3kV-12kV Indoor CTs LMZB6-10Q(L)/150 Cast-Resin Cable/Busbar-Through Current Transformer May 16, 2026 / May 16, 2026 by tianming LMZB6-10Q(L)/150 indoor fully enclosed epoxy cast-resin cable/busbar-through current transformer for 10kV, 11kV and 12kV class switchgear. Designed for high-current measurement, energy metering and relay protection, with 1500A–5000A current range, 1A or 5A secondary output, 12/42/75kV insulation level and 0.2S/0.5/5P accuracy options. Read more »
3kV-12kV Indoor CTs LMZB6-10Q/160 Epoxy Cast-Resin Cable/Busbar-Through Current Transformer May 16, 2026 by tianming LMZB6-10Q / 160 indoor epoxy cast-resin cable/busbar-through current transformer for 10kV, 11kV and 12kV class switchgear. Designed for high-current measurement, energy metering and relay protection, with 1000A–5000A current range, 1A or 5A secondary output, 12/42/75kV insulation level and 0.2(S)/0.5(S)/5(10)P accuracy options. Read more »
Documents SEL-351 21kV Cast-Resin Voltage Transformer for Substation Metering and Protection – IEC 61869-3 Certified May 16, 2026 / May 2, 2026 by tianming SEL-351 21kV Cast-Resin Voltage Transformer for Substation Metering and Protection – IEC 61869-3 Certified Introduction to the SEL-351 Voltage Transformer The SEL-351 is a 21kV (IEC-rated) cast-resin voltage transformer (VT) engineered for high-reliability metering and protective relaying applications in medium-voltage power systems. Designed in strict accordance with IEC 61869-3 and GB/T 20840.3, this instrument transformer […] Read more »
3kV-12kV Indoor CTs LMZBJ17-12L(Q)/170 Epoxy Cast-Resin Cable/Busbar-Through Current Transformer May 16, 2026 / May 16, 2026 by tianming LMZBJ17-12L / LMZBJ17-12Q / 170 indoor epoxy cast-resin cable/busbar-through current transformer for 10kV, 11kV and 12kV class switchgear. Combines Q/170 and Q/L variants, with 1500A-5000A current range, 1A or 5A secondary output, 12/42/75kV insulation level and 0.2S/0.5/5P protection combinations. Read more »
