The above pictures are all updated to the latest version of the circuit board pictures. This version is the latest version. The latest version of the circuit is more optimized than the previous version, and the performance is more stable.
High current is routed at the top and bottom,
Version 1: Two 40cm cable with thermostat included, no other accessories.
Version 2: Contains 2 40cm flat cables, 2 75°C thermostats, copper pillars, and a set of screws.
PCB size: 9.3*7.8cm
The kit adopts NE555 time base chip circuit, all in-line resistors adopt 5-ring precision resistors and high-power thermistors to ensure the good quality of the soft start board.
The main function:
1: Suppress the instantaneous surge current when the power amplifier is turned on. Due to the large power of the Class A and high-power amplifier transformers, the extremely low load impedance and the large capacity of the power supply filter capacitor, the current is too large when the power amplifier is turned on, and the rectifier bridge and the filter capacitor are easily damaged.
2: This kit does not need high-power switches to control, only low-power switch control (low-power self-locking switches and light touch switches can be used)
This kit is the anti-impact delay start of the power amplifier power supply, install this kit in front of the transformer to delay the start
The principle of time-delay anti-impact starting power supply: turn on the (AC220V IN) power supply, and one of the 30A relays will be closed after the control terminal is short-circuited, so that the thermistor will be connected in series. After 2-3 seconds, the main 30A relay will be turned on The whole (AC220V) OUT) Power on
This kit sets the delay time to 2-3 seconds
Relay rated current 30A
The high current is the top and bottom wiring,
One set of power input, 2 sets of output
2 sets of temperature control switch terminals,
1 set of tact switch terminals
1 set of self-locking switch terminal zi
The soft start board installation needs to select the switch type:
1: The self-locking switch and light touch switch of this soft start board are compatible. If you use a self-locking switch (need to short-circuit the terminal of the light touch switch with a wire), if you use a light touch switch (need to use a wire for the terminal of the self-locking switch) Connection short-circuit)
2: Temperature control switch type (normally open), no need to connect the short-circuit thermostat socket without using the thermostat
(0.022UF) The capacitor is a spark-extinguishing capacitor (that is, the capacitor is connected to both ends of the relay. When the relay is closed, a spark is generated, and the capacitor is used to eliminate the spark). Some friends will say that the board is not connected The load is measured with a multimeter. When the switch is not turned on, there will be a 220V voltage output at the output end? Since the internal resistance of the multimeter is as high as tens of M, the measurement is an induced voltage, which is coupled through a 0.022UF capacitor, and there is nothing when the load is connected. . The principle is the same as when the host computer in your home is not connected to the ground wire and the shell will be charged.
The light switch in your home is a self-locking switch, and the power switch of your mobile phone and the remote control button of your home TV are just touch
The soft-start board of this power supply uses two-color LED light-emitting diodes to display red when it is in standby, and green when it works after a delay.
