Documents LB-10W Installation Requirements and Maintenance Guidelines: Comprehensive Technical Specifications for 10kV Power Systems — Application Note and Selection Criteria February 25, 2026 by tianming Application Note and Selection Criteria: LB-10W Outdoor Oil-Immersed Current Transformer Figure 1: LB-10W Outdoor Oil-Immersed Current Transformer – Application Overview Overview The LB-10W is an outdoor oil-immersed current transformer designed for 10kV power systems, providing accurate current measurement and protection functions in medium voltage applications. This transformer is specifically engineered for harsh outdoor environments while […] Read more »
Documents LB-10W Installation Requirements and Maintenance Guidelines: Comprehensive Technical Specifications for 10kV Power Systems — Installation and Wiring Guide February 25, 2026 by tianming Installation and Wiring Guide: LB-10W Outdoor Oil-Immersed Current Transformer Figure 1: LB-10W Outdoor Oil-Immersed Current Transformer – Installation Overview Pre-Installation Checks Visual Inspection: Check for physical damage during transportation Documentation Review: Verify product specifications match project requirements Tools Preparation: Gather required tools: torque wrench, insulation tester, grounding equipment Safety Equipment: Ensure proper PPE is available […] Read more »
Documents LB-10W Installation Requirements and Maintenance Guidelines: Comprehensive Technical Specifications for 10kV Power Systems February 22, 2026 / February 22, 2026 by tianming Installation Requirements LB-10W Outdoor Oil-Immersed Current Transformer for 10kV power systems. Installation Environment Location: Outdoor installation Altitude: ≤ 1000 m above sea level Ambient Temperature: -25°C to +40°C Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90% Mechanical Installation Mounting: Use designated fixing holes Clearance: Maintain electrical clearance and creepage distances per IEC 61869 […] Read more »
High-Voltage Metering Box JLSZK-12 IV High Voltage Prepaid Metering Box (6-10kV outdoor) January 28, 2026 / January 28, 2026 by tianming Product Overview The JLSZK-12 IV high-voltage prepaid metering box is an outdoor integrated measurement and control unit that combines a ZW8-12 vacuum circuit breaker (VCB) with built-in voltage transformer (VT/PT) and current transformer (CT) assemblies within a single weather-resistant enclosure. The unit is intended for three-phase 50 Hz medium-voltage distribution systems with rated system voltage […] Read more »
High-Voltage Metering Box ZWJLSZ-12 Prepaid Stainless Steel Cylindrical Metering Box January 27, 2026 / January 28, 2026 by tianming Product Overview The ZWJLSZ-12 prepaid high-voltage metering box is an integrated outdoor metering device combining ZW8-12 AC vacuum circuit breaker with built-in voltage and current transformers, equipped with control and metering enclosure. This device provides prepaid energy metering, circuit protection, and remote control functions for medium-voltage power distribution systems operating at rated frequency of 50Hz […] Read more »
High-Voltage Metering Box ZWJ-12 High Voltage Prepaid Metering Box January 27, 2026 / February 21, 2026 by tianming Product Overview ZWJ-12 series high-voltage prepaid metering boxes are integrated load control and metering devices designed for 10 kV, 50 Hz power distribution systems with capacity up to 5000 kVA. The integrated design combines vacuum circuit breaker (VCB), voltage transformer (PT), and current transformer (CT) in a fully enclosed configuration to provide comprehensive prepaid metering, […] Read more »
Zero-Sequence CT LJM-1, LJM-2, LJM-3, LJM-3 busbar-type zero-sequence current transformers January 27, 2026 / February 21, 2026 by tianming Product Overview LJM series busbar-type zero‑sequence current transformers for medium‑voltage ground fault protection. Functional Definition The LJM-1, LJM-2, LJM-3, and LJM-3L series busbar-type zero-sequence current transformers are precision electromagnetic instruments designed for ground fault protection in medium-voltage AC power systems. These transformers are engineered for reliable detection of residual current in three-phase systems, providing critical […] Read more »
Zero-Sequence CT LJK-φ100~φ240 Zero-Sequence Current Transformer January 27, 2026 / January 27, 2026 by tianming Product Overview Functional Definition The LJK-φ100~φ240 series zero-sequence current transformers are precision electromagnetic instruments designed for ground fault detection, residual current monitoring, and earth leakage protection in low and medium-voltage AC power distribution systems. These transformers utilize electromagnetic induction principles to detect unbalanced current (zero-sequence component) in three-phase systems, providing isolated secondary current signals for […] Read more »
Zero-Sequence CT LJ-2 / LJ-4 / LJ-7 Indoor Zero-Sequence Current Transformers for Ground Fault Protection January 26, 2026 / January 27, 2026 by tianming Product Overview Functional Definition The LJ-2, LJ-4, and LJ-7 series zero-sequence current transformers are indoor-type electromagnetic devices designed for residual (zero-sequence) current detection in low-current grounding systems. They are commonly applied for ground fault protection of generators, synchronous condensers, and motors, and are typically used in conjunction with DD-11/60 relays to form a complete ground […] Read more »
Zero-Sequence CT LXK-120 Split-Core Zero-Sequence Current Transformer for Ground Fault (≤10kV) January 26, 2026 / January 27, 2026 by tianming Product Overview Functional Definition The LXK-120 split-core zero-sequence current transformer (core-balance CT) is a protective current transformer designed for earth-fault (zero-sequence) detection in low and medium-voltage AC power systems up to 10 kV. Based on electromagnetic induction, it detects residual (zero-sequence) current as the vector sum of phase currents passing through the aperture, providing a […] Read more »
Zero-Sequence CT LKZB-0.5 (LBD-LCT) split-core zero-sequence current transformers (6–35kV) January 26, 2026 / January 27, 2026 by tianming Product Overview Functional Definition The LKZB-0.5 (LBD-LCT) series split-core zero-sequence current transformers are precision electromagnetic protection devices designed for residual (zero-sequence) current detection and earth-fault protection in medium-voltage AC cable systems. Based on electromagnetic induction, the transformer monitors the vector sum of three-phase currents (zero-sequence component) to indicate insulation degradation, leakage, or ground fault conditions. […] Read more »
10KV Voltage Transformer RZL-10 / JDZ10 3–10kV Epoxy Resin Voltage Transformer | IEC 61869 January 25, 2026 / January 26, 2026 by tianming Product Overview The RZL-10 and JDZ10-3, 6, 10A(B) series are single-phase, indoor, cast resin (epoxy resin) voltage transformers designed for precise voltage measurement, energy metering, voltage monitoring, and relay protection in 3kV / 6kV / 10kV medium-voltage (MV) AC power systems. These inductive voltage transformers operate on electromagnetic induction and provide galvanically isolated secondary voltage […] Read more » recommended
