The intelligent hybrid switch combines the advantages of low energy consumption of mechanical contacts and no operating arc of solid-state relays to realize zero-crossing
No inrush current connection and no arc breaking of the relay, and ensure voltage zero-crossing input and current zero-crossing cut-off when switching capacitors
The voltage drop is small during operation, the energy consumption is low, and no harmonics are generated
The intelligent hybrid switch combines the advantages of low energy consumption of mechanical contacts and no operating arc of solid-state relays to realize zero-crossing, no inrush current connection and no arc breaking of the relay, and ensure voltage zero-crossing input and current zero-crossing cut-off when switching capacitors. When the switch is on and off, the inrush current is small, there is no overvoltage, and the contacts are not sintered; the voltage drop is small during operation, the energy consumption is low, and no harmonics are generated. It is suitable for the control of low-voltage reactive power compensation capacitors, heating wires, lamps, motors, resistors and other loads. It is a new type of green and eco-friendly intelligent low-voltage switch.
Using single-chip microcomputer to control switching and intelligently monitor the operation status of thyristor and load, with the following protection functions
1、Voltage fault and loss phase protection
2、Self-diagnostic fault protection
3、No load protection
4、Power failure protection
Note: The magnetic latching relay is used inside the intelligent composite switch. If a strong impact is encountered during transportation, the contacts may be closed and the switch will be in a conductive state. If this happens, you can connect the three-phase input terminal of the switch to 380V power supply, wait for 10 seconds and then cut off the power supply, and the switch will automatically return to the “OFF” state.
Using the industry-leading core patented technology, the on-on time of the thyristor of the intelligent switch is less than a quarter of a cycle (typical value 1 millisecond), and the on-off time is less than half a cycle (typical value 2 milliseconds). It has a very high tolerance to the instantaneous load fault surge current, can effectively resist the self-healing discharge current of the load capacitor, and greatly reduces the fault probability of the switch. It solves the problems of short electrical life, large inrush current, fast burning of mechanical contacts, adhesion, and easy breakdown and poor reliability of traditional composite switch in the market.
Adopting unidirectional thyristor design, compared with the traditional composite switch using bidirectional thyristor, it has extremely high dv/dt and di/dt suppression ability, avoiding problems such as thyristor breakdown caused by misconduction.
The patented technology of capacitive energy storage zero-crossing trigger effectively avoids the problems of easy breakdown and misconduct of high-voltage optocouplers, and electromagnetic interference caused by the use of trigger transformers.
Environment temperature | -25℃～+45℃ |
Rated frequency | 50/60Hz |
Power consumption | ≤1VA |
Contact voltage drop | ≤0.1V |
Relative humidity | At 40℃，20%～90% |
Rated working voltage | 450V/250V AC |
Phase number | three-phase (△ type connection, angle involution connection), single-phase (Y type connection) |
Each turn-on and turn-off interval | ≥1s |
Interval between two consecutive connections | ≥10s |
Contact withstand voltage | ≥1600V DC |
Control signal | 12V DC |
Service life | 500,000 times |
Note: The reactor is selected according to the needs, and the capacitive load can be other loads
Phase | Model | Capacity | Mark |
Three-phase | LFK400-25-3 | ≤25kvar | |
LFK400-30-3 | ≤30kvar | ||
LFK400-40-3 | ≤40kvar | ||
LFK400-45-3 | ≤45kvar | ||
LFK400-50-3 | ≤50kvar | ||
Single-phase | LFK230-20-1 | ≤6.7kvar | |
LFK230-25-1 | ≤8.3kvar | ||
LFK230-30-1 | ≤10kvar | ||
LFK230-40-1 | ≤13.3kvar | ||
LFK230-45-1 | ≤15kvar | ||
LFK230-50-1 | ≤16.7kvar | ||
LFK400-25-1 | ≤8.3kvar | Angular inseam； Separable phase compensation | |
LFK400-30-1 | ≤10kvar | ||
LFK400-40-1 | ≤13.3kvar | ||
LFK400-45-1 | ≤15kvar | ||
LFK400-50-1 | ≤16.7kvar |
Note: Control voltage and current: 6~16VDC, 5~20mA, can also be selected according to customer requirements.
| Classify | Title | Download |
|---|---|---|
| Opzts Intelligent Composite Switch V1.0 | ||
| Opzts Thyristor Switch Operation Manual V2.0 |
Leave your contacts and our engineers will help you to find the solution you are looking for.
The power factor controller is the main component of the reactive compensation (filtering), it can automatically break the capacitor in steps to achieve economically and effective operation.
KNOW MORE
Lafaelt Electirc emphasizes on the production technology and eco-friendly concept, by adopting unique professional technology and accumulated experience in capacitor manufacturing for many years.
KNOW MORE
Hvpcap high-voltage power factor correction capacitors are used in power systems with a frequency of 50/60Hz to increase system power factor
KNOW MORE
The intelligent shunt capacitor is an independent and complete intelligent compensation unit composed of intelligent measurement and control unit, zero-crossing switching relay, protective unit and two (△ type) or one (Y type) low-voltage self-healing capacitor.
KNOW MORE
Lafaelt detuned reactor is used in the low-voltage power compensation cabinet and is connected in series with power factor correction capacitor. It can absorb the grid harmonics effectively, improve the voltage waveform and increase the power factor, and can effectively suppress the clothing inrush current and operating overvoltage
KNOW MORE
Lafaelt dry-type iron-core high-voltage reactor is mainly used in power systems below 35KV to be connected in series with high-voltage capacitor banks to form a high-voltage reactive power compensation device.
KNOW MORE
With the rapid development of science and technology, power electric technology is constantly updated and applied to various occasions on a large scale, the requirements for the power system is getting higher and higher
KNOW MORE
The thyristor switch adopts the zero-crossing trigger technology, and is the ideal solution for dynamic power factor correction.
KNOW MORE
Hi! Welcome back.
How are you doing?
Let s talk! We’ll provide the perfect solution for you！
Since its establishment, Lafaelt Electric has focused on comprehensive solutions for power quality and energy management. It has excellent quality in designing, researching, producing and manufacturing.
Sales Center Add: 2nd Floor, No. 268, Tongxie Road, Changning District, Shanghai, China
Factory Add:No. 79, Qunxing Road, Xinwu District, Wuxi City, Jiangsu Province, China
English
Russian
French
Spanish
Arabic
Thai