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441H generator backup protection relay
The generator backup protection relay is designed for the protection of thermal and hydroelectric generating units with a capacity of 10 MW or less, and works in conjunction with the AGP-441H differential protection device to provide protection. Its primary scope of…

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443H Motor Self-Balancing Differential Protection
Overview For motors adopting self balancing differential protection motor schemes, medium voltage motor differential protection and the self-balancing differential protection function must be properly configured; this device is applicable to the protection and monitoring of both high‑voltage and low‑voltage asynchronous…

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610H Intelligent Small Current Grounding Line Selection
Small Current Grounding Line Selection Overview The Small current grounding line selecting device is suitable for identifying single-phase ground faults in power systems with an ungrounded neutral or a neutral grounded through a resistor or an arc-suppression coil. Widely used…

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APQ-9100H Power Quality Monitors
Overview of Power Quality Monitors As a professional Power Quality Monitor among Power Quality Products, it delivers real-time monitoring of critical grid parameters for Power of Quality assessment, including harmonic content up to the 63rd order, total harmonic distortion (THD),…

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ASB-4401H Intelligent Transformer Protection Relays
Overview The ASB-4401 Digital Plant Service Transformer Protection, Measurement, and Control Unit belongs to transformer protection relays, suitable for high-voltage and low-voltage plant service transformers, and integrates protection, measurement, control, and communication functions. Protection Functions (with ANSI Codes) Combined undervoltage…

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ASC-441H capacitor bank protection relay
Overview of Protective Relays In power system and substation automation, capacitor bank protection relay is a widely applied type of relay protection product, and the ASC-441H digital capacitor protection and control unit is perfectly suited for medium- and low-voltage shunt…

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ASD-441H Motor protection relay
The ASD-441H Motor protection relay is primarily designed to protect motors.It is suitable for high-voltage motors in 3 kV to 35 kV systems, and serves as bay-level equipment, performing protection, measurement, control, and communication functions. Product Functions (ANSI) 50/51/46/47/48/49/27/50N/51N/59/66/60/74 Communication…

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ASF-441H Anti-islanding protection products
Overview The ASF-441H Anti-Islanding Protection Device is a new-generation protection device independently developed and manufactured by our company. It is designed to disconnect specified power equipment (such as transmission lines or unit transformers) when the system frequency or voltage drops,…

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ASF-441H System Separation Protection 78
Product Overview The System Separation Protection Device is a new-generation product independently developed and manufactured by our company. It is suitable for substations or interconnections operating with small power sources connected to medium- and low-voltage grids. In the event of…

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ASF-442H Advanced Voltage and Frequency Control
Overview of Voltage and Frequency Control System The ASF-442H Frequency and Voltage Stabilization Control Unit is a core device for voltage and frequency control in power system, control of frequency and voltage, and professional frequency and voltage control. Communication Mode:Optional: RS-485,…

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ASK-43H Transformer gas and temperature protection
Product Overview Transformer gas and temperature protection consists of three non-electrical protection boards, which primarily provide non-electrical output functions. Product Functions (ANSI) Buchholz / Gas Protection Light gas 71G‑L Heavy gas 71G‑H Temperature Protection Oil temperature 26‑O Winding temperature 26‑W…

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ASL-441H line protection relay
Overview The ASL-441H Digital Line Protection and Monitoring Unit, as one of the professional transmission line protection relays and digital relays for transmission line protection, is a high-performance line protection relay suitable for low-current grounding systems with ungrounded neutral points…

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ASL-441XLH line differential protection relay
Overview As a numerical line differential protection relay and protective relay for transmission line, the line differential protection relay — line optical fiber differential protection and control unit — can be installed locally in switchgear cabinets or in a centralized…

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ASL-446H Differential Line Protection
Overview of differential line protection The ASL-446 digital line differential protection device is a relay used for phase fault protection of short transmission lines, and it supports differential line protection for short-circuit faults on lines of various voltage levels. Differential…

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ASL-7615 line distance protection relay
Overview Distance protection measures the distance (or impedance) between the fault location and the protection installation point. Distance relay protection of transmission lines, also referred to as line protection with distance relays, adopts distance relays as the core protective devices,…

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ATN-400 Transformer protection panel
The transformer protection panel is a comprehensive protection, measurement and control cabinet specially configured for the main transformer. It is generally installed in the high‑voltage distribution room. The standard cabinet dimension is 800×600×2260 mm, and non‑standard customized sizes are available…

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