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TXB7S-63 prepaid circuit breaker
1、 Scope of application TXB7S-63 with shunt trip circuit breaker - IC card prepaid circuit breaker, with intelligent shunt trip function, suitable for
Product details
Product Introduction
1、 Scope of application
TXB7S-63 with shunt trip circuit breaker - IC cardPrepaid circuit breakerIt has intelligent shunt tripping function and is suitable for remote control breaking or automatic signal control breaking of circuits with AC 50Hz (or 60Hz), rated working voltage of 230/400V, and rated current of 63A. It also serves as overload and short circuit protection for the circuit and can be used for infrequent operation conversion of the circuit. At present, it is widely used in conjunction with IC card prepaid electricity meters to control the on/off of power lines. The circuit breaker complies with IEC60898, GB10963, GB14048.2 standards and has international advanced level.2、 Model and specifications
3、 Product Features
TXB7S-63 IC cardPrepaid circuit breakerAssembled from TXB7N miniature circuit breaker and intelligent module shunt release. There are two ways to release: instantaneous release and delayed release.The shell is made of flame-retardant, arc resistant, high-strength new plastic, which has good impact resistance and flame retardancy.
The contact system adopts an electric repulsion mechanism, greatly improving the breaking capacity of the circuit breaker and making its function more complete and reliable. The L pole has electromagnetic and thermal protection functions, the N pole has electromagnetic protection function, and the S pole has shunt tripping function.
The fully automatic winding shunt release coil undergoes a 3300V (1.2/50 μ s) voltage test and meets the insulation level III of CEI28-6.
The life of the shunt release exceeds 4000 times.
The shunt trip coil has a current limiting effect, ensuring that the current absorbed by the coil in the shunt trip circuit is within a reliable safety value, which can effectively prevent coil burnout during actual use.
The shunt release device is designed as a single pole with strong anti-interference ability, which can effectively prevent the misoperation of the shunt release under electromagnetic interference and thermal interference.
Prepaid circuit breaker is designed specifically for use with single-phase and three-phase four wire IC card energy meters. It has anti time overload protection and short circuit protection functions, and can receive signals from IC card energy meters to cut off the circuit, preventing users from delaying electricity bills. It has been widely used in the national power grid one household one meter renovation project.
4、 Structural characteristics
（Prepaid circuit breaker）The working voltage of the delayed excitation trip characteristic circuit breaker is any value within the range of 70% to 110%. When in use, a control voltage is applied to the terminals of the circuit breaker and the intelligent excitation trip breaker through a signal line, that is, the signal voltage (which can be provided by a remote control circuit or an IC card electricity meter), and then the circuit breaker handle is pushed to the closed position to close. When remote control is required (or when the IC card meter is overdue), the control voltage can be disconnected through the control system. The circuit breaker should be able to reliably disconnect within 0.5s ≤ t ≤ 2s, and also have short-circuit and overload functions.5、 Main parameters and technical performance
| Rated current | 6A、10A、16A、20A、25A、32A、40A、50A、63A |
| number of poles | 1P+N / 3P+N |
| rated operational voltage | 1P+N 230V |
| 3P+N 400V | |
| frequency | 50Hz |
| Working voltage range | 65%~120% Un |
| Breaking Capacity | 6KA |
| Release curve | C |
| Delay action time (intelligent excitation trip time) | 0.5s~2s |
| Reset time | ＜30s |
| mechanical life | 2000 times |
| Electrical life | 6000 times |
| Current limiting level | 3 |
| impulse withstand voltage | 6kV |
| environment | -25℃~70℃ |
| wire connection | Tunnel type terminal block |
| install | Up and down locking clips for easier installation |
6、 Working principle of IC card prepaid electric meter circuit breaker
Schematic diagram of IC card prepaid electric meter circuit breaker and shunt release
Working principle of IC card prepaid electric meter circuit breaker
With the continuous improvement of people's living standards and the rapid development of industrial automation, the demand for electricity is increasing. Therefore, various relevant departments need to carry out scientific management of electricity demand. Traditional mechanical electric meters are no longer suitable for modern lifestyles, especially in electricity intensive places such as commercial residences, apartments, universities, and storefronts that require intelligent management. At present, many electric fields use IC card prepaid electricity meters to achieve electricity charging, management, and control.
The IC card prepaid electricity meter is a payment before use electricity consumption method that solves the problems of difficult meter reading, difficult charging, and large human resources for the energy management department. The use of prepaid electricity meters frees the management department from the heavy and cumbersome management methods, allowing them to have more energy to standardize the use of electricity, improve service quality and management level, and provide more energy resources for society.
In practical use, the IC card prepaid electricity meter first inputs the electricity in the IC card into the electricity meter. When the remaining electricity reaches the alarm threshold, an alarm signal is issued. After the electricity is used up, the relay in the electricity meter disconnects to stop the user's power supply. At this time, although the user has lost power, the user's line is not completely isolated from the incoming circuit. The electricity meter itself is not disconnected from the incoming circuit and continues to operate, which poses energy consumption and certain safety hazards. In general use, circuit breakers are mostly used to isolate the electricity meter from the power line, protect the line from overload and short circuit, and infrequently connect and disconnect the user line. However, ordinary circuit breakers can connect and disconnect the line even when there is no power in the IC card prepaid electricity meter, so the electricity meter may still be in a live state. Therefore, designing a fully functional and protective circuit breaker with a shunt release that can be used with prepaid electricity meters is also an important part of the research on circuit breaker protection function.
The specific working principle of the IC card prepaid electric meter circuit breaker and shunt release is shown in Figure 1.
When there is remaining power in the IC card prepaid electricity meter, there is a voltage signal at the control terminal K. The voltage signal is rectified by diode D2, reduced by resistors R1 and R2, filtered by current limiting capacitor C1, and sent to the base of transistor VT1 to make transistor VT1 conductive. The base of transistor VT2 is at a low level. When transistor VT2 is cut off, the shunt release is not powered. At this time, the circuit breaker can be closed and the user can use electricity.
When the remaining power of the IC card prepaid electricity meter is used up, there is no voltage signal at the control terminal K. The base of the transistor VT1 is at a low level. The transistor VT1 cuts off the L-phase voltage, which is then rectified by the diode D1, and the resistors R3 and R4 are used to reduce the voltage and limit the current to charge the capacitor C2. When the charging reaches a voltage higher than the conduction voltage of the voltage regulator VZ2, the voltage regulator VZ2 conducts, and the transistor VT2 also conducts. The shunt release circuit breaker is turned on to disconnect the user from power. After the circuit breaker is opened, the shunt release also loses power to prevent the shunt release from being burned out due to long-term power on. At this time, if the user manually closes the circuit breaker again, the control circuit will delay the charging of capacitor C2 and then open again to remind the user to recharge the IC card prepaid electricity meter.
When the prepaid electricity meter is recharged successfully, the IC card prepaid electricity meter will reconnect to the K control terminal. The action process is the same as when the IC card prepaid electricity meter has remaining power. At this time, the shunt release is not powered on, and the user can close the circuit breaker.
RV in the circuit serves as a varistor for lightning protection, preventing damage to electronic components such as diodes and transistors in the control circuit caused by high-voltage pulses from lightning strikes. The circuit shown in the figure is also applicable to three-phase circuits when applied to single-phase circuits.
Specific Application of IC Card Prepaid Electric Meter Circuit Breaker
The wiring for single-phase application is shown in Figure 2. The schematic diagram of the shunt release circuit for three-phase application is shown in Figure 3.
Figure 2
Fig 3
The circuit breaker is installed at the user's incoming and outgoing terminals, connected to the IC card prepaid electricity meter. The control terminal K of the circuit breaker shunt release is connected to the control terminal of the IC card prepaid electricity meter. If the control terminal of the IC card prepaid electricity meter is not set, it can also be connected to the phase line output terminal of the IC card prepaid electricity meter according to the dashed line in Figure 2 and Figure 3.
7、 Appearance and installation dimensions
8、 Ordering Notice
When placing an order, please indicate the following points:
Product model and name: such as TXB7S-63Circuit breakers for prepaid electricity meters/ TXB7SPrepaid electric meter dedicated circuit breakerInstantaneous tripping rated current: such as 32A.
Polar number: 1P+N
Order quantity: such as 3210 pieces.
Example of ordering: TXB7S-63Prepaid electric meter circuit breaker， 1P+N，32A， 6110 pieces.
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