The HTM3C external plastic shell circuit breaker for electric energy meters is a comprehensive intelligent plastic shell circuit breaker with overload protection, short circuit protection, overvoltage protection, undervoltage protection, phase loss protection, automatic reclosing, and communication functions. Suitable for low-voltage power grids with four wire neutral points directly grounded (TT) on the low-voltage side of distribution transformers, it is used to provide indirect contact protection against personal electric shock hazards, and can also be used to protect lines or equipment from overcurrent, short circuit, undervoltage, overvoltage, phase loss, and residual current protection functions.

This circuit breaker has the characteristics of small size, easy installation and use, fixed and adjustable action values, and simple operation. It can meet the needs of users in various regions and environments, and is particularly suitable for national urban and rural power grid JP cabinet renovation or new construction projects.

Compliant with standard GB/T14048.2 and partially compliant with the control function requirements of O/GDW11421-2015.

working conditions

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

When the highest temperature is 40 ℃, the relative humidity of the air does not exceed 50%. When the monthly average lowest temperature of the wettest month does not exceed 25 ℃, the monthly average maximum relative humidity of that month does not exceed 90%, and the daily average maximum relative humidity does not exceed 95%, taking into account condensation that occurs on the surface of the product due to temperature changes.

The installation location should not exceed an altitude of 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; No explosive or corrosive gases; No rain or snow invasion; Dry and ventilated.

characteristic

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

Small size: It integrates residual current protection, overcurrent protection, and automatic reclosing functions, with a small size and comprehensive functions. Compared with conventional products in the market, it reduces the volume by 20% and can reduce the installation space of the product in the cabinet.

Easy to operate: The human-machine interface is friendly and the button operation is simple.

Intelligence: Adopting high-performance 32-bit ARM microprocessors for real-time signal processing and intelligent control. Communicable: 485 communication interface, can communicate with the upper computer, achieve four remote functions, can record and query detailed data such as phase sequence, cause, and tripping time that cause tripping; Multiple communication protocols.

Appearance and installation dimensions