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ZK type SCR voltage regulator is used with SCR, it can adjust the load heating power, phase-shifting triggering mode have depth voltage negative feedback, so it has a good adjustment linear, the impact of network fluctuating will be the smallest. Zero-crossing triggering modeâs instrument design have network voltage fluctuation compensation function, it can stabilize different power voltage heating power
2.1 Design newlyï¼on the plane built-in big ammeter is for output indication, legible to read and adjust the machine to zero. The instrumentâs depth cut normal production down to half than, weight lighten 2kg, shock-resistant feature is goodï¼anti-jamming ability is strong.
2.2 When load is short circuit or overcurrentï¼the instrument can close automatically SCRâs trigger signal in 1ï½2 periodï¼let SCR carry current and protect from damageï¼at the same time it have indication function when load is short circuit.
2.3 Directly get synchronizing signals from the network, applies to the â Y â method connection, control is stable and reliable.
3. Model explanation: ZK type SCR voltage (average power ) regulator
Size unitï¼ mmï¼ Exterior size Install size Exterior size Install size
Single phase voltage regulator ZK-1ï¼160Ã80Ã130ï¼ 152Ã76ï¼ ZKA-1ï¼96Ã96Ã130ï¼ 92Ã92
Three phases voltage regulator ZK-3ï¼160Ã80Ã130ï¼152Ã76ï¼ ZKA-3ï¼96Ã96Ã130ï¼ 92Ã92
4. Main technical indicatorsï¼
4.1 Input signalï¼0~10mAï¼Input Impedance 800Î©ï¼or 4ï½20mAï¼Input Impedance 250Î©ï¼;
4.2 Output pulseï¼Amplitude value is not less than 3VãWidth is not less than 50uS (20Î© load);
4.3 Phase â shift trigger maximum conduction angleï¼not less than 150Â°;
4.4 Working environmentï¼
Temperature: 0ï½50âï¼relative humidityâ¤85ï¼ ï¼without corrode and strong electric radiation;
4.5 Power supplyï¼AC220VÂ±15%, 50Hz about 3VA
4.6 Weightï¼about 0.8Kg
5.1 Inspect the instrument accessoriesï¼two mounting screwsãtwo mounting boardsï¼
5.2 Connect inputãoutputï¼SCR control electrodeâs G1ãG2 and Kï¼1ãK2ï¼ãfeedbackãpowerãground and furnace wires according to the specification.
5.3 When adopt âï¼¹â method connectionï¼SCRâs resist pressure must be over 600V. SCRâs rated current must be more than 1.5 times of practical using electric currents. SCR must be used with radiator of area big enough, and pay attention to air ventilationï¼assure that SCRâs temperature does not excees120â under any condition. When control method is half-controlled, diodeâs resist pressureãcurrent index are as single phase SCR.
5.4 Three fuses (connected serially SCRâs anode ) need connect phase line input terminal, and shall not connect other locations.
5.5 If the SCRâs radiator is alive, when install, you should give full consideration to prevent getting an electric shock and short circuit between SCR.
5.6 If connect amperemeter, you must connect serially SCRâs anode, donât let the trigger signal move through amperemeter.
5.7 Every SCRâs trigger signal line and other wires should be separate wiring, prevent interfereing with each other and lead to SCR trigger losing control.
6.Operating and Adjustingï¼
6.1 Put the âmanual ~ automaticâ toggle switch to the âmanualâ position, turn counterclockwise the â manual regulationâ spin on the panel, plugged in the power switch, the power indicator light is light switch, the instrument can work.
6.2 Adjust the â manual regulationâ spin on the panel, reflecting furnace heating voltage ammeter reading will increase from 0 to 90% about, then decrease the ammeter reading to 40% about, wait a moment, the furnace temperature increase, it means that the instrument manual work normally.
6.3 If the instrument cooperate with the meter having current output ï¼°.I.D adjustingï¼put the âmanual ~ automaticâ toggle switch to the âautomaticâ position, the load heating voltage is automatically controlled P.I.D adjusting meterâs output current value.
6.4 Put the âmanual ~ automaticâ toggle switch to the âmanualâ position, adjust the â manual regulationâ spin, heating voltage is adjusted to the needed valueï¼at the moment the instrumentâs function is like a manual voltage regulator.
6.5 If load design heating power is large, or low temperature low internal impedance object initial heat, you can limit the maximum heating power by adjusting the âfeedbackâ potentiometer on the panelï¼at the moment indicate output ammeter reading diminishï¼it can protect load or SCR from being damaged in the current. In general conditions, put the instrument to the âautomaticâ function, when full inputï¼if 10mAï¼, adjust the âfeedbackâ potentiometer again, let load voltage value subject to 90% of supply voltage.
6.6 Donât drive inductive load, such as induction furnaceãstep-down transformer, avoid SCR damage.
6.7 If a phase SCR can not full conduct or output serious shake, you can exchange the phase trigger signal output connection.
6.8 The instrumentâs all internal adjustment potentiometer have been transferred before leaving factory, in general conditions, donât transfer random.