Instructions for the Use of KY-ZB3 Zero-Crossing Cycle Trigger

　　

I. overview

　　KY-ZB3 cycle trigger is the most widely used SSR signal processing controller in industrial electric heating system. There are two control modes: periodic zero-crossing (PWM duty cycle control) and cyclic zero-crossing (CYC variable cycle control). The trigger adopts phase-locked loop synchronous circuit and automatically distinguishes phase. It can be used as single-phase power regulation, three-phase three-control and three-phase two-control zero-crossing trigger control. Its superior zero-crossing control makes the on-off of load current uniformly distributed according to sinusoidal wave. It improves the accuracy of regulation and utilization efficiency of power supply, avoids the phenomenon of needle punching, and has obvious power saving effect. It is mainly used in resistive load, temperature control unit and various industrial furnaces.

　　

Ⅱ. Performance characteristics

　　○ It can be used in power supply of 220 V/380 V power supply frequency 50/60 Hz power grid.

　　○ It can directly interface with the output signals of various control instruments (temperature controllers) and microcomputers at home and abroad.

　　○ Suitable for resistive load, high control precision and obvious power saving effect.

　　○ It has superior zero-crossing output control of cycle wave and avoids the phenomena of needle punching.

　　○ Restrict output function (range 0-100%).

　　○ Two output control modes (PWM duty cycle output and CYC cycle output control).

　　○ Slow start-up in 0.15 seconds is used to reduce the average power of cold start-up.

　　○ Integrative structure: It integrates power supply and digital trigger control circuit. Structural tightness, easy debugging, simple wiring.

　　○ It is safe, convenient, dustproof and reliable by fixing the shell and fixing the chute.

　　

Ⅲ. Main Technical Indicators and Their Use

　　Input signal: 4-20mA DC 0-5V DC 0-10V PWM input 10K potentiometer (manual adjustment)

　　Output specifications: three-phase three-control, three-phase two-control (users need to tell me the company to adjust before choosing).

　　Indicative function:

　　IN_Input Instruction

　　OUT_Cycle Output Indicator

　　Power usage: AC1 and AC2 are connected to 220VAC. Power consumption 3W.

　　Load test: SCR can not work properly without load or current less than 0.5A when testing trigger. So the load current should be greater than 0.5A.

　　

IV. Working methods

　　1. Selection of PWM and CYC: Selection of control output type through internal PC jumper.

　　2. Limitation of output power: Limit output by adjusting internal adjustable potentiometer VR (range 0-100%).

　　3. Load connection mode: single-phase control reverse parallel connection, three-phase three-control triangle connection and star connection can not connect the middle line, three-phase two-control pure resistive load.

　　4. Proportional period of PWM input: pulse width modulation (duty cycle) pulse, fixed for 2 seconds, maximum input current allowed 20 mA.

　　5. Three-phase load current detection: Because the center zero of SSR is floating (zero-crossing SSR can not be turned on at the same time), sometimes it will inevitably cause the load current at the same phase end of the controller power supply to be larger than the other two phases. In application, the power symmetry of the heater or the switching input phase can be adjusted to adjust the balance. If the three-phase central grounding or PWM mode is adopted, the load current is basically balanced.