TXB7N-63 miniature circuit breaker (4.5KA breaking)

TXB7N-63High score cutoffminiature circuit breaker（New C45 Circuit Breaker Switch）After a long period of exploration by Taixi Electric, combined with the requirements of the current power grid and power equipment, a new type of circuit breaker has been developed and manufactured（Low voltage air switch），Circuit breakerIt has the characteristics of advanced structure, fast arc initiation, short arc ignition, reliable performance, high breaking capacity, and compact appearance. The shell and three components are made of impact resistant and highly flame-retardant materials. Suitable for places with AC 50Hz or 60Hz, rated voltage below 230V/400V, and rated current below 63A power line facilities. It is mainly used for overload and short circuit protection of equipment, and can also be used for infrequent line switching under normal circumstances. It can also be used as an isolation switch for disconnecting lines for line and equipment maintenance.
This circuit breaker is suitable for various places such as industry, commerce, high-rise buildings, and residential buildings.
Compliant with standards: IE60898-1 and GB10963.1; This product has obtained China's mandatory CCC certification.

The upper limit of ambient air temperature shall not exceed+40 ℃; The lower limit shall not exceed -5 ℃, and the average temperature shall not exceed+35 ℃.
The installation location generally does not exceed an altitude of 2000 meters.
The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is+40 ℃; Higher relative humidity is allowed at lower temperatures, for example, at a temperature of 20 degrees Celsius, the relative humidity can reach 90%. It should be noted that due to temperature changes, moderate condensation may occasionally occur, and appropriate measures should be taken (such as drainage holes).
The circuit breaker is installed vertically, with an inclination of no more than 5% from the vertical plane.
A place without significant shaking or impact vibration.
If installed inside a closed protective enclosure and multiple units are installed closely together, the capacity reduction factor should be selected from 0.7 to 0.8. For metal protective enclosures, a high value can be used, and for all plastic protective enclosures, a low value can be used!

The components inside the TXB7N series new high breaking miniature circuit breaker are positioned by a plastic casing. The shell is made of flame-retardant and arc resistant high-strength new plastic, with good impact strength and flame retardant performance. The contact system adopts an electric repulsion structure, which has a significant current limiting effect and greatly improves the segmentation ability of the circuit breaker. The release adopts a screw type electromagnetic release, with accurate and stable setting current. Multi pole products are assembled from single poles.
The TXB7N series of new miniature circuit breakers are suitable for use by untrained personnel and do not require maintenance. The protection characteristics of the overcurrent release have been set before leaving the factory, and it is impossible for users to adjust them during use to avoid affecting performance.
The TXB7N series of new circuit breakers can be equipped with various accessories, such as shunt release devices, overvoltage and undervoltage protection devices, and can be retrofitted with DC circuit breakers. Using wire connection method, it can connect up to 25mm ² round copper wire. Install the guide rail using TH35-7.5 standard steel.

The main contact of the TXB7N-63 new miniature circuit breaker is manually operated or electrically closed. After the main contact is closed, the free release mechanism locks the main contact in the closed position. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, while the coil of the undervoltage release is connected in parallel with the power supply. When a short circuit or severe overload occurs in the circuit, the armature of the overcurrent release will engage, causing the free release mechanism to operate and the main contact to disconnect the main circuit. When the circuit is overloaded, the thermal element of the thermal release generates heat, causing the bimetallic strip to bend and pushing the free release mechanism to move. When the circuit is under voltage, the armature of the undervoltage release is released. Also enables the free release mechanism to operate. The shunt release is used for remote control. During normal operation, its coil is de energized. When distance control is required, the start button is pressed to energize the coil, and the armature drives the free release mechanism to operate, causing the main contact to disconnect.

TXB7N-63 New Miniature Circuit BreakerMain specifications of the new C45 circuit breaker switch:

Divided by rated current ln: 1A, 2A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A.
Divided by Polarity (POLE): 1P. Unipolar; 2P. Two poles; 3P. Three poles; 4P. Quadrupole.
According to the form of instantaneous release of circuit breakers: a. B type (3ln~6ln); b. Type C (5ln~10ln); c. D-type (10ln~20ln).
Mechanical and electrical lifespan: a. Electrical lifespan: not less than 4000 cycles; b. Mechanical lifespan: not less than 10000 cycles.

Rated short-circuit capacity

Overcurrent protection characteristics under ambient temperature of 30 ℃~35 ℃

Mechanical and electrical lifespan: The circuit breaker is tested at a frequency of 120 cycles per hour (>32A) or 240 cycles per hour (≤ 32A) to make and break rated currents at a specified rated voltage, with a power factor of 0.85~0.9. Its mechanical and electrical lifespan is 4000 cycles.