Smart Capacitor Switching Switch YDCK
I. Overview
Our compound switch is an ideal product for on-off control of low-voltage power capacitors. It is used to detect over-cut capacitors by detecting external control signals and is groundbreaking.
The increased data communication function greatly reduces the complicated procedures of the complete wiring.
Its main advantages are: automatic search for voltage zero-crossing input, search for current zero-crossing cut-off, no surge current switching; magnetic holding relay, low power consumption, no
Harmonic injection: It has perfect self-diagnosis and protection functions to realize voltage abnormality protection, phase loss protection and fault self-diagnosis.
Second, technical parameters
Rated working voltage: AC380V/AC220V
Control capacitor capacity: three-phase ≤ 50kvar, △ type connection
Single phase ≤15kvar, Y-connection
Rated current: 100A/60A/45A
Allowable deviation: three-phase voltage synchronous change <±20%
Circuit power consumption ≤1.5VA
Service life: 2 million times
Contact buck ≤100mA
Switch withstand voltage ≥ 2500V
Response time ≤100ms
Each turn-on and turn-off interval ≥1s
3. Main technical features
1) Zero-crossing
The basic working principle of the composite switch is to achieve voltage zero-crossing and current zero-crossing.
2) Low power consumption
Since the magnetic holding relay is used, the control device consumes power only at the moment of switching, and since the contact resistance of the magnetic holding relay is small, it does not generate heat.
No need to add heat sinks or fans to reduce losses. It does not cause harm to other electrical systems running on the same machine, and truly achieves the goal of energy saving.
3) Using single-chip microcomputer to control switching, and intelligently monitor the relay and input power and load operation status, thus providing perfect protection function
Power supply voltage phase loss protection: When the system voltage is supplied, the switch refuses to engage the brake; if there is a phase loss after the closing, it will automatically open the gate.
Automatic judgment of fault protection: The system automatically monitors the running state of the magnetic holding relay. If there is a fault, the switch refuses to close, and the fault is automatically opened after the fault is turned on.
No-load protection: When the load is not connected, the switch refuses to close
Power failure protection: When a sudden power failure occurs after closing, the switch automatically trips and disconnects
4) The input signal is electrically isolated from the capacitor switching switch and has 485 communication control. It can be used with conventional controllers, and it can be matched with our controller (485 communication).
use. And using 485 communication control, wiring is simple, user installation and debugging is convenient
5) Strong anti-interference ability, safe and reliable work
5, matters needing attention
wiring:
1) AC input and output are strictly prohibited
2) DC control mode: the level signal input polarity should be connected correctly.

3) AC control mode: Please confirm the control voltage
4) 485 communication control mode: the data cable is plugged in correctly and in place
5) It must be noted that the switch matches the capacity of the capacitor to be connected.
6) The three-phase sequence of the main circuit A and B.C of the power supply must be connected correctly.
6, the method of operation
Power-on self-test function
1) Automatically detect the state of the capacitor switching switch and automatically return to the normal working state.
2) The power light is always on or flashing, and the composite switch is working normally.
When the A B C lamp is given an external control signal, it will light up accordingly.
The fault light will turn red when the composite switch self-test error
7, installation
The device is installed on the 380V power distribution network for the on/off control of the low voltage reactive compensation capacitor. The user can install in the low-voltage reactive power compensation capacitor cabinet or other suitable position, generally adopting the hanging installation method.