Low Voltage PTs Low Voltage Potential Transformers JDG4-0.5 indoor dry-type low-voltage Potential transformer May 5, 2026 / June 24, 2026 by tianming JDG4-0.5 indoor dry-type voltage transformer for low-voltage AC systems up to 0.5kV. Designed for voltage measurement, electrical energy metering and relay protection, with 100–1140V/100V ratio options, 0.5 accuracy class, 15VA rated output, 100VA limit output, C-core dry-type structure and fixed indoor installation. Read more »
Low Voltage PTs Low Voltage Potential Transformers JDG-0.5, JDG4-0.5 indoor dry-type low-voltage Potential transformer May 5, 2026 / June 18, 2026 by tianming JDG-0.5 / JDG4-0.5 indoor dry-type voltage transformers for low-voltage AC systems up to 0.5kV. Designed for voltage measurement, electrical energy metering and relay protection, with 220/100V, 380/100V and 500/100V ratios, 0.5/1/3 accuracy classes, 100V secondary output and dry-type fixed installation. Read more »
Documents Electronic & Optical Current Transformers: Rogowski Coil, LPCT, Faraday Effect & IEC 61850-9-2 Digital Output Guide May 5, 2026 by tianming Electronic & Optical Current Transformers: Rogowski Coil, LPCT, Faraday Effect & IEC 61850-9-2 Digital Output Guide Meta Description: Comprehensive guide on electronic and optical current transformers (ECT/OCT). Covers Rogowski coil, low-power coil (LPCT), Faraday effect optical CT, electronic voltage transformers (EVT), merging units, IEC 61850-9-2 digital output, and smart substation integration. Includes selection methodology, testing […] Read more »
Documents Ensure Accurate Metering & Protection with LZZBJ9-10 Cast-Resin CT Maintenance per IEC & GB/T Standards May 5, 2026 / April 22, 2026 by tianming Introduction The LZZBJ9-10 current transformer is a resin-insulated, indoor-type instrument transformer designed for accurate current measurement and protection in 10kV power systems. It conforms to international standards such as IEC 61869 and GB/T 20840, ensuring high reliability, thermal stability, and long service life under normal operating conditions. This device plays a critical role in monitoring […] Read more »
Documents SEL-351 11kV Cast-Resin Current Transformer for Substation Metering and Protection – IEC 61869-2 Certified May 5, 2026 / May 2, 2026 by tianming 11kV Cast-Resin Current Transformer UNKNOWN for Meterin […] Read more »
Documents LZZBJ9-10 11kV Current Transformer: IEC-Compliant Testing & Maintenance Guide for Indoor Metering & Protection May 4, 2026 / April 22, 2026 by tianming 4. Periodic Testing Periodic testing is a scheduled, systematic evaluation of electrical systems and components to ensure ongoing safety, reliability, and compliance with regulatory standards. Conducted at predetermined intervals—such as annually, semi-annually, or quarterly—these tests help identify degradation, wear, or latent faults before they lead to failure or hazards. Key elements include insulation resistance testing, […] Read more »
Documents Precision Installation of LZZBJ9-10 11kV Indoor Current Transformers for Reliable Metering & Protection May 4, 2026 / April 22, 2026 by tianming Introduction The LZZBJ9-10 current transformer is a resin-insulated, indoor-type instrument transformer designed for accurate current measurement and protection in 10 kV AC power systems operating at 50 Hz or 60 Hz. This device plays a critical role in electrical substations, switchgear assemblies, and industrial power distribution networks by providing scaled-down replicas of high primary currents […] Read more »
Documents MER-1 11kV Cast-Resin Current Transformer – IEC 61869-2 Compliant for Metering & Protection Applications May 4, 2026 / May 2, 2026 by tianming IEC 61869-3 Certified 11kV Voltage Transformer MER-1 for Metering & Protection Applications Introduction to the MER-1 Voltage Transformer The MER-1 is a single-phase, indoor/outdoor-rated cast-resin voltage transformer (VT) designed for accurate voltage measurement and reliable protective relay operation in medium-voltage power systems operating at 11kV (IEC standard) or 10kV (domestic Chinese system). It employs vacuum […] Read more »
Documents Bushing CT & Circuit Breaker CT: Design, Selection & Integration Guide for GIS/AIS Substations (IEC 61869-2) May 4, 2026 by tianming Bushing CT & Circuit Breaker CT: Design, Selection & Integration Guide for GIS/AIS Substations (IEC 61869-2) Meta Description: Comprehensive guide on bushing current transformers and circuit breaker integrated CTs. Covers design principles, insulation coordination, accuracy classes, GIS/AIS integration, transient performance, and selection per IEC 61869-2 and IEEE C57.13. Includes installation guidelines, testing procedures, and comparison […] Read more »
Documents UNKNOWN 11kV Cast-Resin Current Transformer Compliant with IEC 61869-2 for Metering & Protection for substation appli… May 4, 2026 / May 2, 2026 by tianming For Substation Metering & Protection: UNKNOWN 11kV […] Read more »
Low Voltage CTs Low Voltage Current Transformers LFZ1D-0.66 low-voltage state grid metering current transformer May 4, 2026 / July 20, 2026 by tianming LFZ1D-0.66 state grid metering current transformer for indoor low-voltage AC systems up to 0.66kV. Designed for current measurement and electrical energy metering, with 5A secondary output, 10A–100A primary current options, 0.5S/0.2S accuracy classes, cast-resin insulation and fixed installation for metering cabinets. Read more »
Low Voltage CTs Low Voltage Current Transformers LFZ1D-0.66, LMZ□D-0.66 State Grid Metering Current Transformer May 4, 2026 / July 20, 2026 by tianming LFZD-0.66, LMZ□D-0.66 series cast-resin current transformers for indoor low-voltage metering systems up to 0.66kV. Designed for current measurement and electrical energy metering, with 5A or 1A secondary output, 0.2/0.2S/0.5/0.5S accuracy classes, fixed installation, and multiple round-hole or rectangular-window structures for 5A–1500A applications. Read more »
