I. Introduction to the principle and function of frame circuit breaker:
Frame circuit breaker function introduction: The circuit breaker is three-dimensional arrangement, contact system, instantaneous overcurrent decoupling left and right side plates are installed on an insulated plate. The upper part is equipped with an arc extinguishing system, and the operating mechanism can be installed in front or on the right side, with "split" and "close" instructions and manual disconnect buttons. The upper left side is equipped with a shunt striker, and the back is equipped with an undervoltage striker connected to the striker half-shaft. Fast saturation current transformers or current-voltage converters are mounted on the lower busbar. The undervoltage delay device, thermal relay or semiconductor striker can be mounted underneath respectively.
HKW15-2000, 3200, 4000, 6300 circuit breakers are arranged in three-dimensional form, consisting of base frame, side plates and crossbeams, with each phase contact system installed on the base frame and interrupter chamber above. The operating mechanism is in front of the right side of the breaker and is connected to the contact system through the main shaft. The electric operating mechanism is installed in the lower part of the circuit breaker through the square shaft and the mechanism as a whole, which is used for storage or direct closure of the circuit breaker, and the closure after storage is undertaken by the energy-releasing solenoid. An anti-bounce mechanism is installed above the left side plate to prevent the breaker from bouncing when it is disconnected.
Various kinds of overcurrent detriggers are installed under the circuit breaker according to different requirements, undervoltage, shunt detriggers and electric operation control parts are installed on the left side, where undervoltage, shunt detriggers are connected to the amplifying mechanism through the detriggers to reduce the detriggering force of the circuit breaker. 12 pairs of auxiliary contacts are available for the user to connect the secondary circuit, and the panel has an indicator board "1" showing the working position of the circuit breaker. ""0" and "storage energy" instructions, and for closing and breaking with the button "1" "0 "HKW15-1000 and 1600 circuit breakers are equipped with frontal manual operation handle; HKW15-2500 and 4000 are equipped with manual operation handle for maintenance (both can be removed).
II, the internal structure of the produced frame circuit breaker is roughly as follows:
The circuit breaker is arranged in three-dimensional form, with contact system, instantaneous overcurrent decoupler and left and right side plates installed on an insulated plate. The upper part is equipped with an arc extinguishing system, and the operating mechanism can be installed in front or on the right side, with "divide" and "close" indication and manual disconnect button. The upper left side is equipped with a shunt striker, and the back is equipped with an undervoltage striker connected to the striker half-shaft. Fast saturation current transformers or current-voltage converters are mounted on the lower busbar. The undervoltage delay device, thermal relay or semiconductor striker can be mounted underneath respectively.
The specific HKW15-2000 is an example: the circuit breaker is arranged in three-dimensional form, consisting of a base frame, side plates and crossbeams, and each phase contact system is installed on the base frame with an interrupter chamber above. The operating mechanism is in front of the right side of the circuit breaker and is connected to the contact system through the main shaft. The electric operating mechanism is installed in the lower part of the circuit breaker through the square shaft and the mechanism as a whole, which is used for the storage or direct closure of the circuit breaker, and the closure after storage is undertaken by the energy-releasing solenoid. An anti-bounce mechanism is installed above the left side plate to prevent the breaker from bouncing when it is disconnected.
Various kinds of overcurrent detriggers are installed under the circuit breaker according to different requirements, undervoltage, shunt detriggers and electric operation control parts are installed on the left side, where undervoltage, shunt detriggers are connected to the amplifying mechanism through the detriggers to reduce the detriggering force of the circuit breaker. 12 pairs of auxiliary contacts are available for the user to connect the secondary circuit, and the panel has an indicator board "1" showing the working position of the circuit breaker. ""0" and "storage energy" instructions, and for closing and breaking with the button "1" "0 "HKW15-1000 and 1600 circuit breakers are equipped with frontal manual operation handle; HK15-2500 and 4000 are equipped with manual operation handle for maintenance (both can be removed).
In addition, the company produces intelligent frame circuit breaker for AC 50Hz, rated voltage 380V, 660V, rated current of 200A-6300A distribution network, mainly used to distribute electrical energy and protect the line and power supply equipment from overload, under voltage, short circuit, single-phase grounding and other fault hazards, the circuit breaker has a variety of intelligent protection functions, can do selective protection, with action Accurate, to avoid unnecessary power outages and improve the reliability of power supply. The frame circuit breaker is used to distribute electrical energy and protect the line and power supply equipment from overload, undervoltage, short circuit, etc. Under normal conditions, it can be used for infrequent conversion of the line. 1250A or less circuit breaker can be used to protect the motor from overload and short circuit in the network of AC 50Hz voltage 380V. Under normal conditions, they can also be used for infrequent starting of motors.
