Thermomagnetic overload adjustable current protection module and circuit breaker
A protection module and current regulation technology, applied in the direction of adjustment of protection switch conditions, protection switch operation/release mechanism, etc. Small size and compact structure
Pending Publication Date: 2021-06-01
SHANGHAI RENMIN ELECTRICAL APP WORKS
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Problems solved by technology
[0005] At present, for the 63A frame molded case circuit breaker, due to the small size of the 63A frame molded case circuit breaker, often the 63A frame thermal magnetic molded case circuit breaker does not have the overload adjustable function, or the circuit breaker with the overload adjustable function The overall volume of the release is large, and the existing release modules are difficult to meet the requirements, or it is difficult to realize short-circuit protection, overload protection and adjustable functions at the same time
Method used
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Embodiment
[0051] Such as figure 1 , 2 , 6. A thermal-magnetic overload adjustable current protection module, taking a four-pole circuit breaker as an example, including:
[0052]A module base 300 is used to install each component; four electromagnetic components 100 are installed in a row in the module base 300, and then loaded into the limit block 301 to limit the initial position, and a locking lever mechanism 200 is installed on the module base 300 The upper part is matched with the electromagnetic assembly 100. A reset push rod 600 is set on the module base 300. The bottom of the reset push rod 600 is provided with a third elastic reset member 601. The reset push rod 600 matches the tripping shaft 800 of the circuit breaker mechanism. , the third elastic reset member 601 is a spring A, and the spring A makes the reset push rod turn over toward the tripping shaft 800 of the circuit breaker mechanism. When the current is overloaded or short-circuited, the reset push rod 600 pushes a...
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The thermomagnetic overload adjustable current protection module comprises a module base, an electromagnetic assembly, a lock catch rod mechanism and a reset push rod, wherein the electromagnetic assembly comprises a magnet yoke, a pull rod, a bimetallic strip and a thermal element, and the lock catch rod mechanism is matched with the electromagnetic assembly and comprises a shaft A and a lock catch rod. A flange matched with the pull rod, a supporting part matched with the bimetallic strip and a hook are respectively arranged on the lock catch rod; in a normal state, the hook is clamped on the reset push rod; when current is in an overload or short circuit state, the electromagnetic assembly acts on the lock catch rod, the hook and the reset push rod are tripped, and after tripping, the reset push rod abuts against a tripping shaft of the circuit breaker mechanism to disconnect a main circuit of the circuit breaker. Compared with the prior art, the protection module is compact in overall structure, and can realize short-circuit protection, overload protection and adjustable functions after being installed in a molded case circuit breaker body.
Description
technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a thermal-magnetic overload adjustable current protection module and a circuit breaker. Background technique [0002] People's requirements for electricity safety are becoming increasingly strict, and plastic case circuit breakers with current protection action are widely used because of their compact structure, small size and high cost performance. The release is an important mechanism in the circuit breaker. The function of the release is to convert electrical energy into mechanical action, and make the molded case circuit breaker open when receiving the trip signal. Traditional releases are divided into electronic releases and thermal magnetic releases, etc., which are generally installed inside the circuit breaker and cooperate with the drawbar of the molded case circuit breaker to realize the tripping action. [0003] At present, the tripper of the mold...
Claims
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IPC IPC(8): H01H71/40H01H71/74
CPCH01H71/40H01H71/74
Inventor 赵轶磊
Owner SHANGHAI RENMIN ELECTRICAL APP WORKS