HTM3C electric energy meter external molded case circuit breaker is a comprehensive intelligent plastic case circuit breaker with overload protection, short circuit protection, overvoltage protection, undervoltage protection, phase loss protection, automatic reclosing and communication functions. It is suitable for low-voltage power grids with four-wire neutral point direct grounding (TT) on the low-voltage side of distribution transformers. It is used to provide indirect contact protection against personal electric shock hazards. It can also be used to protect lines or equipment from overcurrent, short circuit, undervoltage, overvoltage, phase loss, etc. and residual current protection.

The circuit breaker has the characteristics of small size, easy installation and use, fixed and adjustable action value, simple operation, etc. It can be applied to users in various places and various environmental needs, especially suitable for national urban and rural power grid JP cabinet transformation or new construction projects.

Comply with standards: GB/T14048.2, and meet some requirements of O/GDW11421-2015 control functions.

Working conditions

Ambient temperature: In addition to meeting the temperature range of -5℃~+40℃ required by the national standard, it can also operate reliably at extreme ambient temperatures such as -25℃~+70℃.

When the maximum temperature is 40℃, the relative humidity of the air shall not exceed 50%, and the monthly average maximum relative humidity of the wettest month shall not exceed 90% when the monthly average minimum temperature does not exceed 25℃, and the daily average maximum relative humidity shall not exceed 95%, and the condensation on the surface of the product due to temperature changes shall be taken into account.

The altitude of the installation site shall not exceed 2000 meters. In high-altitude areas, the capacity should be reduced. It is recommended to reduce the capacity by 10% for every 1000 meters increase in altitude.

Pollution level: Level 3

Installation category: The external magnetic field of the installation site shall not exceed 5 times the geomagnetic field in any direction; there shall be no explosive or corrosive gases; there shall be no rain or snow invasion; it shall be dry and ventilated.

Features

Multi-function: In addition to the three-stage protection of long delay, short delay and instantaneous protection and residual current protection, it also has overvoltage protection, undervoltage protection, phase loss protection, automatic reclosing, communication and other functions. It can display parameters such as load current, three-phase power supply voltage, and residual current of the power grid; it can identify, display, store, query, and delete trip types (overload, undervoltage, residual current, overvoltage, and phase loss).

Small size: It integrates residual current protection, overcurrent protection, and automatic reclosing functions. It is small in size and full in function. It is 20% smaller than conventional products on the market, and can reduce the installation space of the product in the cabinet.

Easy to operate: The human-machine interface is friendly and the buttons are easy to operate.

Intelligent: It uses a high-performance 32-bit ARM microprocessor to perform real-time signal processing and intelligent control. Communicable: 485 communication interface, which can communicate with the host computer to realize the four remote functions, and can record and query detailed data such as the phase sequence, cause, and time of tripping; multiple communication protocols.

Appearance and installation dimensions