KY-SFK-10*3 Composite Switch

Instructions

　　I. Overview:

　　KY-SFK-10*3 composite switch is developed to overcome the shortcomings of SCR contactless solid state relay and AC contactor in the application of low voltage reactive power compensation. It combines the advantages of AC contactor and SCR, and uses computer to control SCR to close at zero voltage and zero current. No inrush current and low overvoltage when switching on and off, which is borne by SCR. It has the functions of anti-interference, lightning protection, power supply phase-absence, load phase-absence and no-load tripping. The response time is less than 200 mS. It is especially suitable for fast switching capacitors. It can also be used for starting control of motor system and resistance load switching. It does not need to be installed in bulk. Heater.

　　Ⅱ. Type Naming:

　　Ⅲ. Main parameters:

　　1. Technical parameters

　　1.1 rated operating voltage: 400VAC 50Hz

　　1.2 rated working current 25A 40A 60A

　　1.3 Rated Control Voltage: 12VDC

　　2. Technical requirements:

　　2.1 Control Function

　　2.1.1 Switching Action: Closing at Zero Voltage and Switching at Zero Current.

　　2.1.2 Automatically searches for the best input point and responds quickly.

　　2.1.3 Response time: <200 mS

　　3. Protection function

　　3.1 The output circuit is excised by abnormal power supply, and the output circuit is excised by operating power supply voltage loss.

　　3.2 Blocking the output when the power supply and load circuit are disconnected.

　　3.3 Conditions of Use

　　3.3.1 Elevation not exceeding 2000 m

　　3.3.2 Ambient temperature: -20 ~60.

　　3.3.3 Relative humidity: +40 C, not more than 90%

　　3.3.4 Working Voltage Range: 380V+15% Three-phase AC

　　Ⅳ.wiring diagram:

　　Ⅴ. Notes:

　　1. AC input and output are strictly prohibited.

　　2. The control voltage input polarity V and Ka (Kb, Kc) should be connected correctly.

　　Common end of V-connection controller (+12VDC)

　　Ka connects the output of the controller (one of the 1-12 terminals)

　　If the connection of Y-type Kb and Kc is shown in the wiring diagram of reactive power compensation controller

　　3. When transporting, the composite switch may cause the magnetic retaining relay to be turned on in case of strong vibration, but when electrified, the switch will automatically reset and return to normal state without manual reset.