Documents JDZ9-10 10kV Voltage Transformer: IEC-Compliant Indoor Cast-Resin VT for Metering & Protection May 20, 2026 / April 22, 2026 by tianming Introduction The JDZ9-10 voltage transformer is a critical component in medium-voltage power systems, specifically engineered for accurate voltage measurement and reliable protection in 10 kV networks. As a resin-insulated, indoor-type instrument transformer, the JDZ9-10 offers high dielectric strength, excellent thermal stability, and long-term operational reliability under varying load conditions. Its compact design and robust construction […] Read more »
Documents CT Selection for Generator Protection: Transient Performance, Saturation & Relay Coordination Guide (IEC 61869-2, IEEE C57.13) May 20, 2026 by tianming CT Selection for Generator Protection: Transient Performance, Saturation & Relay Coordination Guide (IEC 61869-2, IEEE C57.13) Meta Description: Comprehensive guide on current transformer (CT) selection for generator protection. Covers transient performance, saturation, relay coordination, and compliance with IEC 61869-2 and IEEE C57.13. Includes selection methodology, testing procedures, and troubleshooting for generator differential, stator ground fault, […] Read more »
3kV-12kV Indoor CTs LZZBJ9-10C8/210/2S (4S) Indoor Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming Product Overview The LZZBJ9-10C8/210/2S and LZZBJ9-10C8/210/4S current transformers are indoor epoxy cast-resin, fully enclosed support-type current transformers for medium-voltage switchgear. This combined product page covers both the 2S dual-secondary configuration and the 4S multi-secondary configuration under the same 210 structural platform. The C8/210 platform is designed for medium- and high-current indoor switchgear applications where stable […] Read more »
3kV-12kV Indoor CTs LZZBJ9-10(225b) Indoor Epoxy Cast-Resin High-Voltage Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-10(225b) indoor epoxy cast-resin High-Voltage current transformer for 10kV, 11kV and 12kV class switchgear. Designed for 3000A to 5000A feeder applications, with 30VA output, 63kA short-time thermal current, 160kA dynamic current and large 225b support body for busbar connection. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/185b/4S, AS12/185b/4S Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/185b/4S, also supplied as AS12/185b/4S, is an indoor epoxy cast-resin current transformer for 10kV, 11kV and 12kV class switchgear. The 185b support body and 4S multi-secondary design support metering, measurement, relay protection and backup protection, with 1A or 5A secondary output, 12/42/75kV insulation coordination and IEC-oriented technical selection. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/185b/2S Indoor Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/185b/2S indoor epoxy cast-resin current transformer for 10kV, 11kV and 12kV class switchgear. The 185b support body and 2S dual-secondary configuration support current measurement, energy metering and relay protection, with 1A or 5A secondary output, 12/42/75kV insulation coordination and IEC-oriented technical selection. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/150b/4S, AS12/150b/4S Epoxy Resin Casting Type Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/150b/4S, also supplied as AS12/150b/4S, is a 12kV indoor epoxy resin cast current transformer for 10kV, 11kV and 12kV class switchgear. The compact 150b body and 4S multi-secondary design support metering, monitoring, relay protection and backup protection, with 1A or 5A output and IEC-oriented technical selection. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/175b/4S, AS12/175b/4S Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/175b/4S, also supplied as AS12/175b/4S, is an indoor epoxy cast-resin current transformer for 10kV, 11kV and 12kV class switchgear. The 175b support body and 4S multi-secondary design support metering, monitoring and relay protection, with 1A or 5A secondary output, 12/42/75kV insulation level and project-based accuracy combinations. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/175b/2S, AS12 Indoor Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/175b/2S, also supplied as AS12/175b/2S, is an indoor epoxy cast-resin current transformer for 10kV, 11kV and 12kV class switchgear. The 175b body and 2S dual-secondary design support metering and relay protection circuits, with 1A or 5A secondary output, 12/42/75kV insulation level and optional live display device integration. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/150b/2S Epoxy Resin Casting Type Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/150b/2S indoor epoxy resin cast current transformer for international 10kV, 11kV and 12kV class switchgear. Also known as AS12/150b/2S, it is designed for current measurement, energy metering and relay protection, with 1A or 5A secondary output, 12/42/75kV insulation level and 2S dual-secondary configuration. Read more »
3kV-12kV Indoor CTs LZZBJ9-12/190b/4S, AS12 Indoor Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-12/190b/4S, AS12/190b/4S and AS12/190b/4S indoor epoxy cast-resin current transformer for international 10kV, 11kV and 12kV class switchgear. Designed for current measurement, energy metering and relay protection, with 1A or 5A secondary output, 190b/4S multi-core structure, dry-type fully enclosed insulation and metering/protection accuracy combinations. Read more »
3kV-12kV Indoor CTs LZZBJ9-10C3, LZZBJ9-10C3Q3/Q4 Indoor Epoxy Cast-Resin Current Transformer May 19, 2026 / July 20, 2026 by tianming LZZBJ9-10C3 / C3Q3 / C3Q4 indoor epoxy cast-resin current transformer for international 10kV, 11kV and 12kV class switchgear. Designed for current measurement, energy metering and relay protection, with 1A or 5A secondary output, current range up to 3150A, 0.2S/0.5/5P20 accuracy options and high-current terminal arrangements. Read more »
