Documents MER-1 11kV Cast-Resin Current Transformer for Substation Metering & Protection – IEC 61869-2 Compliant May 8, 2026 / May 2, 2026 by tianming For Substation Metering & Protection: JDJ-3 11kV Cast-Resin Voltage Transformer per IEC 61869-3 Introduction to the JDJ-3 Voltage Transformer The JDJ-3 is a single-phase, indoor-type cast-resin voltage transformer (VT) engineered for precise voltage transformation in 11kV (IEC-rated) or 10kV (domestic system) medium-voltage networks. Designed in strict accordance with IEC 61869-3 and GB/T 20840.3, it serves […] Read more »
Documents LAJ-10Q 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified May 7, 2026 / April 27, 2026 by tianming LAJ-10Q 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified Introduction to the LAJ-10Q Current Transformer The LAJ-10Q is a high-voltage, indoor-type cast-resin current transformer (CT) engineered for precise current measurement and robust protection functionality in 11kV (IEC-rated) or 10kV (domestic system equivalent) medium-voltage networks. Designed in strict compliance with IEC […] Read more »
Documents 11kV Substation Protection: UNKNOWN Cast-Resin Current Transformer Compliant with IEC 61869-2 May 7, 2026 / May 2, 2026 by tianming UNKNOWN 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified Introduction to the UNKNOWN Current Transformer The UNKNOWN 11kV cast-resin current transformer (CT) is engineered for high-reliability applications in medium-voltage power systems, specifically designed to meet the dual demands of accurate metering and robust protective relaying. This device operates on the […] Read more »
Documents Current & Voltage Transformers in Ring Main Units (RMU) & Switchgear: Integration, Selection & Testing Guide (IEC 62271-200) May 7, 2026 by tianming Current & Voltage Transformers in Ring Main Units (RMU) & Switchgear: Integration, Selection & Testing Guide (IEC 62271-200) Meta Description: Comprehensive guide on integrating current and voltage transformers in Ring Main Units (RMUs) and medium-voltage switchgear. Covers sensor types, space constraints, protection schemes, testing procedures, and compliance with IEC 62271-200 and IEC 61869. Includes selection […] Read more »
Documents Compliant 11kV LZZBJ9-10 Cast-Resin Current Transformer Meets IEC 61869-2 for Substation & Grid Applications May 7, 2026 / April 24, 2026 by tianming LZZBJ9-10 11kV Cast-Resin Current Transformer – IEC 61869-2 Compliant Applications LZZBJ9-10 11kV Cast-Resin Current Transformer – Application Scenarios per IEC 61869-2 Introduction The LZZBJ9-10 11kV current transformer (CT) is a cast-resin insulated instrument transformer designed for accurate current measurement and protection in medium-voltage electrical systems operating at the standardized IEC voltage level of 11kV. Developed […] Read more »
Zero Sequence CT LXK-φ80, φ100, φ120, φ180-φ260 Split-Core Zero Sequence Current Transformer May 6, 2026 / June 18, 2026 by tianming LXK-φ80/φ100/φ120/φ150/φ180/φ200/φ240/φ260 split-core zero sequence current transformers for indoor cable earth fault protection and residual current monitoring. The open-type epoxy cast-resin CT can be installed around existing cable groups, with 0.72/3kV insulation level, 50Hz/60Hz operation, 5A or 1A secondary output, 10P5 to 10P20 protection classes and 1VA to 15VA output options. Read more »
Zero Sequence CT LXK Series Epoxy Resin Cast Unitary Zero Sequence Current Transformer May 6, 2026 / June 18, 2026 by tianming LXK series indoor epoxy resin cast unitary zero sequence current transformers for cable earth fault protection in small-current grounding systems up to 35kV. Models cover φ80 to φ260 window sizes, with 0.72/3kV insulation level, 50Hz/60Hz operation, 5A or 1A secondary output and 10P5 to 10P20 protection classes. Standard type is integrated non-split; split clamping structure can be customized. Read more »
Zero Sequence CT LXC-10/155-300-60/80 Double Cable Track Type Zero Sequence Current Transformer May 6, 2026 / June 18, 2026 by tianming LXC-10/155-300-60 and LXC-10/155-300-80 indoor cast-resin double cable track zero sequence current transformers for grouped cable earth fault protection and residual current monitoring. Split-core resin-cast structure allows installation around existing cable groups, with 0.72/3kV insulation level, 50Hz/60Hz operation, 5A or 1A secondary output, and 10P5/10P10 protection classes. Read more »
Zero Sequence CT LXKW-120/75/57 Indoor Cast-Resin Open Zero Sequence Current Transformer May 6, 2026 / June 18, 2026 by tianming LXKW-120/75 and LXKW-120/57 indoor cast-resin open zero sequence current transformers for cable earth fault protection and residual current monitoring. Designed with a φ120 mm inner window, 0.72/3kV insulation level, 50Hz/60Hz operation, 5A or 1A secondary output, 10P5/10P10 protection classes, and 57 mm or 75 mm body thickness options for different cabinet layouts. Read more »
Documents LZZBJ9-10 11kV Current Transformer Selection: 0.2S Accuracy Cast-Resin CT for IEC Metering & Protection May 6, 2026 / April 22, 2026 by tianming Introduction The LZZBJ9-10 current transformer is a widely used indoor-type, resin-cast, through-core instrument transformer designed for 10kV power systems. It serves critical roles in electrical energy metering, protective relaying, and system monitoring by accurately transforming high primary currents into standardized, lower secondary currents suitable for connected instruments and relays. Constructed with high-quality epoxy resin and […] Read more »
Zero Sequence CT LMZC-0.5 φ80, φ100, φ120 Split-Core Current Transformer epoxy cast-resin May 6, 2026 / June 18, 2026 by tianming LMZC-0.5 split-core current transformer for 6kV to 35kV indoor ring network cabinets and cable head outlet protection. The epoxy cast-resin open-type CT can be installed around existing cables without disconnection, with LMZC-80/100/120 sizes, Φ60-Φ120 aperture options, 10P10 protection class, 50A-400A primary current ratings and 1.5VA/3.75VA/5VA rated outputs. Read more »
Zero Sequence CT LJZ-φ65, φ80, φ100, φ120, φ165 Epoxy Resin Cast Zero Sequence Current Transformer May 6, 2026 / June 18, 2026 by tianming LJZ-φ65, φ80, φ100, φ120, φ165 indoor epoxy resin cast zero sequence current transformers for cable earth fault detection, residual current monitoring and grounding protection. The series provides φ65, φ80, φ100, φ120 and φ165 cable window options, 0.72/3kV insulation level, 50Hz/60Hz operation, 5A or 1A secondary output, and 10P protection classes for relay protection systems. Read more »
