TWM468081U - Capacitor trip device - Google Patents

Description

Capacitor trip device

This case is an improved device for the capacitor trip device, especially for a capacitor trip device with safety protection and preventing malfunction.

Capacitance tripping devices (CTD) are a very common product, but often overlook the importance of it! There was an accident caused by high-pressure CB explosion. When the quality control personnel read the fault record on the electronic instrument, it found a blank, and found that the electric capacitor-specific capacitor tripping device did not operate, resulting in high-pressure CB without isolation accident, resulting in secondary accident. . Therefore, the components of the capacitor tripping device are small, but sufficient capacity and discharge time must be carefully selected. Otherwise, the high-voltage CB cannot effectively isolate the accident when an accident occurs. Generally, the capacitor tripping device is used as a power supply for the VCB or GCB tripping circuit, and is also suitable for the power supply of the capacitor tripping device when the undervoltage electric shock is operated when the power is turned off. Therefore, after the VCB is powered off, if you want to automatically re-power, you must handle it carefully. In particular, if you want to power off the power station, and the situation is that VCB detects the short-circuit fault of the load due to over-current protection, it is not recommended to automatically reset the power supply before the fault has been cleared.

The existing power supply system is a one-line diagram as shown in Figure 1, and a very important device in the high-voltage isolation device (HVCB) is a command for receiving a relay, as a jump-off of a high-voltage circuit breaker. The main power supply line (in Taiwan, refers to the supply of Taiwan Power Company) The electric mains are isolated from the source of the accident. Therefore, if the circuit breaker cannot jump off immediately in the event of a short-circuit accident in a certain business unit (power receiving party), the high-voltage isolation device (HVCB) will be damaged, and the power supply to the main power supply mains will be extended to other businesses. The unit (power receiving party) causes a chain of industrial losses. Whether the high-voltage circuit breaker can jump in time, controlled by whether the relay can immediately issue a command, therefore, when the working power supply for protecting the power supply has a problem, the protection power will not operate; the protection power When the 驿 will not move, the high-pressure CB will not move when the accident occurs, and it is impossible to isolate the accident point of the public institution, causing a serious secondary accident and even affecting the Taipower power supply feeder to jump off! Don't be careless. Because this high-risk industrial safety incident often leads to accidents due to misjudgment, the operator of the mains supply line (Taiwan Electric Power Company) can prevent the electric breaker from jumping out of the circuit breaker due to the sudden voltage drop. The flow is saturated and slow, and the institution is required to install its protection system according to the regulations, and then the power supply is promised. The main provisions are: when the secondary side power supply of the comparator is used, it should be supplemented by a capacitive tripping device (CTD) or a capacitor tripping device and then connected to the uninterruptible power system (UPS), and electronically or The Capacitor Trip Unit (CTD) used in digital power units shall not be used for circuit breakers or other equipment. This is an ideal, accident, often comes from ideal conditions. In practice, the UPS will almost always fail after one year, but the business unit will not notice that high-voltage isolation equipment is usually found when there is a short-circuit accident. (HVCB) will not trip, and then find that the UPS cannot supply working power to the relay, but it is too late.

However, observing the conventional capacitive tripping device, placed in the disk body, is not obvious. There is also no indication of the input power, an explicit indication of the output, and an indication of the apparent condition. And CB and RY cannot be shared. There is also no foolproof device, which will explode when pressed. There is no isolation transformer for isolation, no way to suppress the wrong voltage, the output has no protective cover, and the disk surface or cover must be opened in case of emergency. Then press PBL or PB and other shortcomings. The conventional capacitor tripping device has the above disadvantages, and the most important one is that it is incompatible and not easy to mark, and often fails, and these problems have long been to be improved.

The Capactor Trip Device (CTD) provided in this case can improve the limitations of the previous capacitive tripping device, and the foolproof type will not be malfunctioned, and there are obvious indications and operation modes to meet the customer's current situation. Demanding.

The capacitor tripping device provided in the present invention comprises: a box-shaped body having a three-dimensional space and an opening; and a panel pivoted on the body to close the opening. A control circuit assembly is fixed in the body, and has an AC input terminal and a DC output terminal. The control circuit assembly has a full-wave rectifying unit and an isolating transformer for rectifying the alternating current into a suitable working direct current. The control circuit component has a circuit breaker electrically connected to the main power supply main line end, and the electric switch is locked with a push button switch to control the alternating current and the direct current power, and the electric contact is normally open (Normal Open). The technique of not being able to energize at the same time as Normal Close prevents the circuit from accidentally pressing the button switch when the power is turned on, and does not burn the capacitor trip device, and the circuit breaker at the main power supply end does not trip. The push button switch is preferably an illuminated push button switch (PBL), and is preferably fixed on the panel, and the light can be used as a power indicator to indicate whether the current capacitor is continuously stored with power and has protection Staying function. In addition, the control circuit component further includes a DC output electric meter and a display lamp externally mounted on the panel; and preferably, an automatic reset type overload trip switch or a replaceable fuse set (TH-RY) ). Further, a surge absorber can be included to protect the device from damage during pulse generation.

In summary, the capacitor tripping device provided in the present case has various advantages, including no need to change Fuse, environmental protection, foolproof, and not easy to malfunction. In addition, on the panel or panel, rather than in the disc body, the high-voltage isolation device can be tripped directly in accordance with the optical button switch in an emergency, effectively isolating the electrical connection of the accident end.

10‧‧‧ Ontology

11‧‧‧ panel

20‧‧‧Control circuit components

21‧‧‧AC input terminal

22‧‧‧DC output terminal

23‧‧‧Full-wave rectification unit

24‧‧‧Isolation transformer (PT)

25‧‧‧ buckle switch

26‧‧‧Electricity

27‧‧‧Automatic reset type overload trip switch or replaceable fuse set (TH-RY)

28‧‧‧ surge absorber

29‧‧‧Terminal group

30‧‧‧Electric meter

31‧‧‧ display lights (PL, commonly known as PL lights)

Figure 1 is a schematic diagram of a single line of the system used in the system power supply circuit.

Figure 2 is a schematic view of the appearance of the capacitor jumper.

Figure 3 is a schematic diagram of the terminal group of the capacitor jump device.

Figure 4 is a schematic diagram of the control flow of the control circuit component of the capacitor jumping device.

Figure 5 is a circuit diagram of the control circuit component of the capacitor jumper device.

Referring to FIG. 2, the capacitor trip device of the present invention has a box-shaped body 10 having a three-dimensional space and an opening; and a panel 11 is pivoted on the body 10 to close the opening. Furthermore, the control circuit assembly 20 as shown in Fig. 5 is fixed in the body 10 of the capacitive trip device. The control circuit assembly 20 has a terminal set 29 (refer to FIG. 3) having at least two AC input terminals 21 for input AC power (AC) and two or four DC output terminals 22 for DC (DC) The output; wherein the DC output supplies current to the circuit breaker (CB) of the main supply rail terminal, and a battery (RL) 26. The control circuit assembly 20 has a full-wave rectifying unit 23 and an isolation transformer (PT) 24 for rectifying the alternating current into a suitable working direct current.

The electric switch 26 is electrically connected to the circuit breaker at the main power supply end, and the electric switch 26 is locked with a push switch 25 to prevent the electric switch from being accidentally pressed when the line is energized. The device, and the circuit breaker at the main power supply end will not trip. The push button switch 25 is preferably an illuminated push button switch (PBL), and is preferably externally fixed to the panel 11 (refer to FIG. 2), and the light can be used as a power indicator to display the current Whether the capacitor is continuously stored with electrical energy and has a foolproof function. The illuminating push button switch (PBL) 25 has a foolproof function because, in the external voltage power transmission, even if the illuminating push button switch 25 is pressed by a malfunction, the power supply is not affected unless the internal circuit is not short-circuited. . In addition, the control circuit assembly 20 further includes a DC output meter 30, and a display lamp (PL, commonly known as PL lamp) 31 externally mounted on the panel 11 (refer to FIG. 2); and preferably, there is an automatic reset A type overload trip switch or a replaceable fuse set (TH-RY) 27 is attached to the panel 11. Further, a surge absorber 28 can be included to protect the device from damage during pulse generation.

Referring to Figures 4 and 5, when the AC power is transformed by the isolation transformer 24, it is ready to detect whether the PT secondary power supply has power. The result is displayed by the output meter 30. If there is electricity, the representative battery 26 keeps moving, and the PL lamp 31 will be bright at this time; if there is no power, the battery 26 will not operate, and the PL lamp 31 will not light. When it is detected that there is no power, it is necessary to detect whether an abnormal accident has occurred. If so, it is necessary to quickly operate the high voltage circuit breaker (refer to Figure 1) to isolate the electrical connection of the accident end. If not, the Capacitor Trip Unit (CTD) power supply is continuously supplied. Of course, in an emergency, the power can be forced to be powered by pressing the illuminated push button switch (PBL) 25 to operate the high voltage circuit breaker and isolate the accident end. As mentioned above, when detecting that the secondary side power supply of the PT is powered, the power supply 26 remains in operation, and the special circuit design of the present creation will continue to lock the internal circuit, so that the push button switch (PBL) 25 cannot be pressed. Discharge, and continue to detect whether the line is abnormal, if there is an abnormal fault, the capacitor trip device (CTD) The output will be driven to operate the high voltage circuit breaker (refer to Figure 1) to isolate the electrical connection at the accident end. If there is no abnormality, the battery 26 is operated to keep the PL lamp 31 on, and the internal line is locked, so that it cannot be accidentally discharged according to the optical button switch (PBL) 25.

The capacitor tripping device provided in the present case has various advantages as described above, including at least the PT has a power source, does not need to change the Fuse, can save space, is environmentally friendly, is foolproof, and does not malfunction. In addition, on the disk surface, rather than in the disk body, the high-voltage isolation device can be tripped according to the light button switch in an emergency, effectively isolating the accident.

10‧‧‧ Ontology

11‧‧‧ panel

25‧‧‧ buckle switch

27‧‧‧Automatic reset type overload trip switch or replaceable fuse set (TH-RY)

30‧‧‧Electric meter

31‧‧‧ display lights

Claims (6)

A capacitor tripping device for controlling and electrically connecting to a main power supply mains breaker comprises: a box-shaped body having a three-dimensional space and an opening; a panel pivoting on the body to close the opening; a buckle switch; A control circuit component is fixed in the body, and has an AC input terminal and a DC output terminal, the control circuit component has a full-wave rectification unit and an isolation transformer, and the AC rectification is transformed into an appropriate working DC power; the capacitor jumps The improvement device is characterized in that: the control circuit component is provided with a circuit breaker electrically connected to the main power supply main line end, and the electric switch is locked with the push button switch to prevent the line from being accidentally pressed by the push button switch when the line is energized. The capacitor trip device will be burned out, and the circuit breaker at the main power supply end will not trip. The capacitor tripping device of claim 1, wherein the control circuit assembly further comprises an electric meter externally mounted on the panel. The capacitor tripping device according to claim 1, wherein the control circuit component has a terminal group having at least two points for inputting an alternating current power source and two points for outputting a direct current power source; wherein the direct current power source output is supplyable to the main power supply The circuit breaker at the trunk end and the electric raft. The capacitor tripping device according to claim 1, wherein the latching switch is an externally mounted latching switch mounted on the panel to display a capacitor storage electrical condition and has a foolproof function. The capacitor tripping device according to claim 1, wherein the control circuit component has an automatic reset type overload trip switch or a replaceable fuse set externally mounted on the panel. The capacitor tripping device of claim 1, wherein the control circuit component further comprises a multi-tap output isolation transformer with a surge absorber to protect the device from damage.