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  • Three-phase four-wire phase lack protection circuit

    2016-09-11 13:34:3860

    Because the current transformer's testing cost is too high, and the volume is big, so the switching power supplies always use the electronic phase lack...

  • Overvoltage Protection(LM317)

    2016-09-11 12:52:5261

    This article describes the Overvoltage Protection (LM317). The principle is very simple, very practical. The circuit components can help you understand...

  • Overvoltage_protection_for_telephone_equipment

    2016-09-11 12:36:2460

    This circuit shows two SIDACs that are connected to protect the telephone Subscriber Loop Interface Circuit (SLIC) and associated electronics from volt...

  • _5V_WITH_PROTECTION_

    2016-09-11 12:28:1760

    Switching- type short-circuit protection network uses R7 connected to Schmitt trigger Q6-Q7. Ground is provided by Q7 which is normally conducting. ff ...

  • Soft Start for Loudspeaker with DC Protection

    2016-09-11 09:33:4160

    Figure 1 The circuit was designed for the purpose of providing protection to the loudspeaker and also incorporating soft touch technology for powering ...

  • The protector circuit of 555 air-conditioning

    2016-09-11 07:48:2160

    When the air-conditioner is at the wind gear(or cold gear) and it is on, as the voltage on C2 can not mutate, so 555 is offset, J2 keeps still, J2-2 is...

  • Op amp power supply over-voltage protection circuit diagram

    2016-09-11 07:38:4260

    Power supply over-voltage protection circuit is shown as above. Figure (a) is simple and practical over-voltage protection circuit, which uses Zener di...

  • zero sequence current protection with ultilizing third harmo

    2016-09-11 07:07:4460

    The shown circuit is suitable for △ or Y-shaped connection of the three-phase motor with rather great capacity. Off phase is to adopt a speed differe...

  • Overvoltage Protection and Overcurrent Protection

    2016-09-11 05:50:0460

    When the voltage in a circuit or part of it is raised above its upper design limit, this is known as overvoltage. The conditions may be hazardous. Depe...

  • Overvoltage Regulator with 250V Surge Protection

    2016-09-11 05:44:5360

    View Full Size Image View Original Datasheet The LT4363 surge stopper protects loads from high voltage transients. It regulates the output during an ov...

  • SOLAR_POWER_OVERCHARGE_PROTECTION

    2016-09-11 05:23:5060

    Voltage regulator is connected across solar-cell away as shown to prevent damage to storage battery by overcharging. Series diode prevents array from d...

  • Over-voltage protection circuit uses the two-way trigger dio

    2016-09-11 04:50:1862

    The over-voltage protection circuit which is composed of the two-way trigger diode and the two-way thyristor is as shown in figure 1. When the voltage ...

  • Reverse Polarity Protector

    2016-09-11 04:10:3961

    A series diode is often used as a means of protecting equipment from accidental power supply reversal, particularly in battery-powered equipment. Due t...

  • 555 household electron protector circuit

    2016-09-11 03:58:1760

    As shown in the figure 10-16, 555 obtains VDD=+12V supply voltage from hypotension rectifier circuit. 555 is in reset state, J has no action, it transm...

  • SCR over-current protection circuit with the Hall components

    2016-09-11 03:50:3660

    Related components PDF download:ULN302067L070Here we introduce one kind of SCR over-current protection circuit that uses the Hall components as the sen...

  • RS-232 surge protection

    2016-09-11 02:01:3360

    RS-232C serial port lines are quite prone to be damaged byovervoltages. The damaged to computer serial ports have becomemore and more expensive to repl...

  • Automotive Braking Air Under Pressure Protector One

    2016-09-11 00:58:0060

    Work of the circuitThe circuit consists of control implementation circuit, low-frequency oscillator, audio oscillator, the pressure sensor SP, relay K ...

  • Household Robots ? They Are Not Responsible to Protect The U

    2016-09-10 22:48:2460

    Nowadays, people are mostly depend on the household appliances, especially the household robots to perform the daily tasks, such as communication, ente...

  • Over Voltage Protector Circuit

    2016-09-10 22:15:5260

    Here is Simple Over Voltage Protector. This circuit protect your circuit from over voltage. A silicon-controlled rectifier is installed in parallel wit...

  • SG201 leakage protection IC diagram

    2016-09-10 22:14:3360

    SG201 is the specific leakage protection integrated circuit, which is widely used in a variety of leakage protection. 1. Features of functionsSG201 IC ...

  • The simple protection plug circuit of color TV

    2016-09-10 22:12:2461

    The circuit of the device is shown in Figure 1, which consists of VDR MY and the dual-way SCR VS. The main function of MY is to absorb the flooding wav...

  • The grid voltage fault protection indicating circuit

    2016-09-10 19:19:1560

    The indicating circuit of grid voltage fault discovery In the figure, the output terminal of the D/A converter DAC-08 is directly connected with the DC...

  • POWER_SUPPLY_PROTECTION_CIRCUIT

    2016-09-10 18:43:4560

    Circuit NotesWhen using a regulated supply to reduce a supply voltage there is always the danger of component failure in the supply and consequent dama...

  • 555 household electron protector circuit

    2016-09-10 17:53:1660

    As shown in the figure 10-16, 555 obtains VDD=+12V supply voltage from hypotension rectifier circuit. 555 is in reset state, J has no action, it transm...

  • Three-phase three-wire system open phase protection circuit

    2016-09-10 17:09:1860

    This is an openphase protection circuit for three-phase three-wire power supply. A, B, C are lack of any one phase, the optocoupler output level is low...

  • Refrigerator automatic protector

    2016-09-10 16:53:3860

    BT33 forms a delay circuit. When the power is turned on, the relay J1 does not work, contact J1-2 disconnects for five minutes, due to the charging vol...

  • Speaker Protector Circuit

    2016-09-10 16:02:3673

    Most of the transistors in this speaker protector function as switches. Normally, Q4, Q5, and K1 are on and the speakers are connected to the amplifier...

  • THYRATRON_PROTECTION_IN_HIGH_VOLTAGE_SWITCH

    2016-09-10 15:15:1460

    C1 is charged to some value up to 400 V, then discharged into load R5 by gas tube represented by S1. V2 acts as cathode follower to charge C1 as long a...

  • diode protection circuit

    2016-09-10 14:37:5260

    The protection circuit which utilizes commutation of diode and the characteristic of low forward-direction voltage drop is shown as picture a,b.Just as...

  • EIA-422-A input protection circuit diagram

    2016-09-10 13:24:3161

    The figure shows two signal lines transmit digital signal EIA-422-A input protection circuit. Resistor R and diode VD1 ~ VD2 are used for protection....

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