TWI549395B - Device and method for automatically detects abnormal of capactor trip device - Google Patents

Description

Method and device for automatically detecting abnormality of capacitor tripping device

This case is an automatic detection method and improved device for the capacitor tripping device, especially for the method that the appearance indication is clear and easy to install and easy to identify and has an external alarm contact, and has an internal automatic detection loop, which can enhance the power supply quality and improve it. Device.

Capactor Trip Device (CTD) is a very popular product, but it is often overlooked! 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. The general capacitor tripping device is used as a power supply for the VCB or GCB tripping circuit, or to protect the working power of the battery, and the power supply of the capacitor tripping device can be utilized. 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.

High-voltage isolation equipment (HVCB) is a command to receive a relay, as a high-voltage circuit breaker, to isolate the main source of power (in Taiwan, the power supply line of Taiwan Power Company) . Therefore, if the circuit breaker cannot be in a certain business unit as scheduled, The electric side will jump off immediately in the event of a short circuit accident, which will cause damage to the high-voltage isolation equipment (H.V.CB), and will affect the main power supply line to supply power to other institutions (power receivers), resulting in chain industry 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 Capacitor tripping devices used in digital electric picks shall not be used for circuit breakers or other equipment. This is an ideal, accident, often comes from ideal conditions. In practice, the continuous power system will almost always fail after one or two years, but the business unit will not notice that it is usually found that there is a short circuit accident and high voltage isolation equipment is found. (HVCB) will not trip, and found that the uninterruptible power system can not supply the 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 voltage, and an indication of the apparent condition. It cannot be shared inside and outside the disk. There is no clear indication that the voltage value is too low, and there is no external output contact indication, alarm or connection to the central control room. There is no automatic detection function inside. When the capacitor is attenuated due to time, the capacitor trip device will be disabled. And if there is no warning, indication and warning device function, it will cause the high voltage disk to have no working power when the system is faulty. It is impossible to isolate the serious situation of the accident point.

The method provided in the present case is for automatically detecting the abnormality of the capacitor tripping device, and first setting up a control circuit; and setting up an electric circuit in the control circuit component. The electric raft is electrically connected to the circuit breaker at the main power supply end, and the electric smash is locked with a shackle switch to prevent the circuit from being energized, and even if the mortice switch is pressed by mistake, the capacitor tripping device will not be burned. And the circuit breaker at the main power supply end will not trip. In addition, an alarm circuit and a set of comparison voltage circuits are also set up, and when the voltage of the capacitor trip device is lower than the set voltage value, an indicating unit and the alarm circuit are driven.

The method for automatically detecting an abnormality of the capacitor tripping device further includes: setting a test button switch; and automatically detecting the line when the set time is established. In addition, when the test button switch is activated, the capacitance inside the control circuit component is forcibly discharged, and when the voltage is lowered to a preset value, the indication unit is driven and the alarm contact is turned on. The method for setting the automatic timing detection may be constituted by a built-in program, or by setting an external point control to adjust the time for setting the timing automatic detection loop.

The Capactor Trip Device (CTD) provided in this case can improve the limitations of the previous capacitive tripping device. Both the disk surface and the fixed type can be used. There are clear indications and automatic detection functions to achieve the customer's actual situation. Strict requirements to prevent faults in the capacitor trip (CTD) when preventing faults.

The capacitor tripping device provided in the present case may be a capacitor tripping device with a type of the same electric meter type, or a capacitor tripping device fixed in the disc body. It has an AC input terminal and a DC output terminal. There are also low voltage warning contacts and insufficient capacity warning contacts. There is a meter on the panel to indicate the status voltage, and there is normal, low voltage, and insufficient capacity on the panel. Light group. There is a warning light and a flashing warning. There is a test button to simulate the state of the capacitor tripping device during power-off, and it is known whether the capacity is sufficient and the reaction time. The warning light will flash or the indicator will light when the voltage is set. In addition to the manual test, the internal circuit contains a set of voltage comparison voltages in addition to the normal capacitor trip circuit, and a variable resistor can be used to obtain a set voltage value. When the set value is lower than the set value, the electronic circuit drives a group of circuits. The warning light is activated, and the other group activates the auxiliary electric power to the low voltage warning contact. And let the low voltage light group on the panel operate. There is a timing automatic detection loop inside, and there is a time circuit inside to output a pulse for a period of time, and the manual test part is automatically switched to prevent short circuit and malfunction. The timing auto-detects the loop establishment timing method, which can be configured by a built-in program or by external point control.

In addition, during the time pulse, when the voltage is insufficient, the automatic detection circuit drives a set of auxiliary power to the insufficient capacity warning contact, and causes the warning light to be lit or flashed, and the insufficient capacity indicator on the panel is instructed. . Furthermore, one of the best methods for the normal, under-voltage, and under-capacity lamp groups on the panel is three different color indicator groups for identification. One of the best choices for the warning light is a flashing indicator light. And when the capacitor trip device is in the test state, the power input indicator on the panel must be turned off. Eli knows that the capacitor tripping device is in a state where the PT secondary power supply side is turned off, and no visual misunderstanding occurs, and the state at the time of the actual fault occurrence is simulated.

In summary, such a capacitive trip device (CTD) can increase the reliability and the power quality can be improved. The capacitor tripping device provided in this case has various advantages. The voltmeter can understand the actual state, and has a manual test structure, and an internal automatic detection loop, and distinguishes the state of the capacitor tripping device with different colors of lights, and provides a capacitor jump. When the device is faulty, the warning flashes The flashing light and the fault state alarm contact can be used for various monitoring and control purposes to solve the problem that the capacitor tripping device is not known in the past.

10‧‧‧ Ontology

11‧‧‧Electrical 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‧‧‧ vents

27‧‧‧Replaceable fuse set FUSE

28‧‧‧ surge absorber

29‧‧‧Terminal group

30‧‧‧Electric meter

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

32‧‧‧ flashing lights

33‧‧‧Status indicator light group

34‧‧‧Insufficient voltage output contacts

35‧‧‧Insufficient capacity output contacts

36‧‧‧External Control Points

37‧‧‧Detection

38‧‧‧Fixed holes

39‧‧‧Back terminal fixing plate

40‧‧‧Comparative voltage loop

41‧‧‧Internal set time circuit

42‧‧‧ cooling fan

FIG. 1 is a perspective view showing the appearance of an apparatus for automatically detecting an abnormality of a capacitor trip device according to the present invention.

Figure 2 is a schematic diagram of the external contacts of the device for automatically detecting the abnormality of the capacitor tripping device of the present invention.

Figure 3 is a schematic diagram of a comparison circuit of the device for automatically detecting the abnormality of the capacitor tripping device of the present invention.

Fig. 4 is a schematic diagram showing the actual capacity loop detection of the device for automatically detecting the abnormality of the capacitor tripping device of the present invention.

Figure 5 is a comparison loop control diagram of the apparatus for automatically detecting the abnormality of the capacitor tripping device of the present invention.

Figure 6 is a timing capacity detection diagram of the apparatus for automatically detecting the abnormality of the capacitive trip device of the present invention.

Figure 7 is an internal circuit diagram of the apparatus for automatically detecting the abnormality of the capacitor tripping device of the present invention.

According to the present invention, a preferred embodiment of the apparatus for automatically detecting the abnormality of the capacitor tripping device is as shown in FIG. 1 and referred to FIG. 2, which has a three-dimensional box-shaped body 10; An electric meter panel 11 is pivotally mounted on the body 10. It can be fixed on the disk surface. Further, all control circuit components, including a capacitor trip device (CTD) control circuit component 20, a comparison circuit 40, and an internal set time circuit 41 are fixed in the body 10 of the capacitor trip device. The control circuit assembly has a terminal group 29 having two AC input terminals 21 for input AC power (AC) and two DC output terminals 22 for DC output; wherein the DC output can supply power to the main power supply terminal. Circuit breaker (CB) or protection power. The control circuit assembly 20 has a full-wave rectifying unit 23 and an isolation transformer (PT) 24 for transforming the AC rectification into an appropriate DC power.

The buckle switch 25 is preferably an illumination type push button switch (PBL), and is preferably externally fixed to the electric meter type panel 11 (refer to FIG. 1), and the light can be used as a power source indication, and The internal cooling fan 42 is used to drive the air through the cooling hole 26 to cool down, and it is displayed whether the current capacitor is continuously stored with electric energy and has a function to be tested. 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. . Because the contacts of 1a, 1b, and 2C are used, in addition, the control circuit component 20 further includes a DC output meter 30 having a function of indicating a voltage value, and a display lamp (PL, commonly known as a PL lamp) 31 is externally mounted thereon. On the meter panel 11 (refer to FIG. 1); and preferably, a replaceable fuse set FUSE27 is attached to the meter panel 11. Further, a surge absorber 28 can be included to protect the device from damage during pulse generation.

As shown in Fig. 7, when the alternating current is transformed by the isolating transformer 24, it is ready to detect whether there is power in the secondary side of the PT. In order to prevent the capacitor from overheating, the cooling fan 42 is cooled to ensure the quality of operation. The detection result is displayed by the output meter 30. Referring to FIG. 3, the DC output terminal 22 is fed back (block 50) to the comparison voltage loop 40 for comparison and selection (block 51). If it is higher than the set voltage value (block 52), the panel 11 status indication is displayed. The normal light in the light group 33 is illuminated (block 53). In contrast, if the DC voltage value of the DC output point 22 is lower than the set voltage value in the comparison circuit 40 (block 54), the indicator light group 33 will be illuminated (block 55) except for the low voltage state indicator in the panel 11. The flashing warning light 32 also operates (block 56), and 37 is operated, the dry contact (A contact) is turned on, and the voltage is insufficient to the output contact 34 (block 57). The variable resistor is used to adjust the set voltage value (block 55).

As shown in Figures 4 and 5, there is a set time circuit 41 inside the device of the present invention. (Block 60), a pulse such as every 4 sec can be continuously outputted 24 hours a day and night, as shown in Fig. 4, and a detection battery 37 is driven (block 61), and when the operation of the power supply 37 is detected, it is as Interlocking the test circuit shown in Figure 7 with the manual PBL will cut the manual test (block 62) to prevent short circuit conditions. The manner in which the pulse is actuated can also be generated by an external control point (block 63). The pulse is outputted by the CTD direct current output terminal 22 at a DC voltage (block 50) for a period of, for example, 4 seconds, and then compared to the internal comparison circuit 40 (block 51). If it is higher than the set voltage value (block 52), the panel 11 state indicates that the normal light in the light group 33 is on (block 53); if the direct current output point 22 has a DC voltage lower than the set voltage value of the comparison circuit 40 (block 54), Then, in addition to the insufficient capacity status indicator in the panel 11 indicating that the light group 33 is on (block 55), the flashing warning light 32 is activated in the panel 11 (block 56), and the detecting power 37 is activated, and the dry contact (A) The contact is turned on and connected to the DC output terminal 35 (block 64).

The capacitor tripping device provided in the present case has various advantages as described above, and the voltage state can be known from the appearance, the meter type is easy to be read, all the states are clear on the panel surface, and the indicator group with clear indication and the blinking blinking indicator are provided. It is better to have a warning dry contact, easy to monitor, and completely overcome the difficulty of maintenance. Improve the quality of electricity, so that the stability of the high-voltage switchboard is more secure.

10‧‧‧ Ontology

11‧‧‧Electrical panel

25‧‧‧ buckle switch

26‧‧‧ vents

27‧‧‧Replaceable fuse sets

29‧‧‧Terminal group

30‧‧‧Electric meter

31‧‧‧ display lights

32‧‧‧ flashing lights

33‧‧‧Status indicator light group

38‧‧‧Fixed holes

Claims (11)

A method for automatically detecting an abnormality of a capacitor tripping device includes: setting up a control circuit; setting an electric circuit in the control circuit component; electrically connecting the electric circuit to a circuit breaker at a main power supply end, and causing the electric circuit to A buckle switch lock prevents the line from being energized, even if the button switch is accidentally pressed, the capacitor trip device will not be burned, and the circuit breaker at the main power supply end will not trip; and an alarm circuit is set up. With a set of comparison voltage circuits, when the voltage of the capacitor trip device is lower than the set voltage value, an indicating unit and the alarm circuit are driven. The method for automatically detecting the abnormality of the capacitor tripping device according to the first aspect of the patent application includes: setting a test button switch; setting a time to automatically detect the line; and setting the control button to activate the control The capacitor inside the circuit component is forcibly discharged, and when the voltage is lowered to a predetermined value, the indicating unit is driven and the alarm contact is turned on. For example, in the method of automatically detecting the abnormality of the capacitor tripping device described in the second item of the patent application, the time of setting the timing automatic detecting loop is adjusted by the external point control. The device for automatically detecting the abnormality of the capacitor jumping device comprises: a box-shaped body having a panel; a transparent cover unit being sealed on the panel; a latch switch fixed to the panel and an indicating unit; 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 rectifies the AC power into a suitable working DC power; the control circuit The component is provided with a circuit breaker electrically connected to the main power supply end, and the electric switch is locked with the buckle switch to prevent the line from being accidentally pressed when the line is energized, and the capacitor tripping device is not burned, and the main The circuit breaker at the mains end of the power supply will not trip; and an alarm circuit; the control circuit component has a set of comparison voltage circuits that, when lower than the set voltage value, will drive the alarm contact of the indicating unit and the alarm circuit. The device for automatically detecting the abnormality of the capacitor tripping device described in claim 4, further comprising: a manual test button switch disposed on the panel; and an automatic detecting circuit disposed inside the body; When the button switch is manually tested, the capacitance inside the control circuit component can be forcibly discharged. When the voltage is lowered, the indicator unit will be driven and the alarm contact will be turned on. The device for automatically detecting the abnormality of the capacitor tripping device described in claim 4, further comprising: an illumination type test button switch disposed on the panel; and an automatic detection circuit disposed inside the body; When the illumination test button switch is operated, the capacitance inside the control circuit component can be forcibly discharged, and when the voltage is lowered, the indication unit is driven and the alarm contact is turned on. The device for automatically detecting the abnormality of the capacitor tripping device as described in claim 4 of the patent scope, the panel The indicating unit is provided with indicating means for displaying normal, low voltage and insufficient capacity. The device for automatically detecting the abnormality of the capacitor tripping device according to the fourth aspect of the patent application, the indicating unit comprises a general indicator light or a flashing indicator light. The device for automatically detecting the abnormality of the capacitor tripping device described in claim 4 of the patent scope further includes a timing automatic detecting loop for automatically forcing the capacitor to discharge a time value within a set time, when the voltage of the control circuit component is internal Below the set voltage value, the indicator unit will be driven and the alarm contact will be turned on. For example, the device for automatically detecting the abnormality of the capacitor tripping device described in claim 4 of the patent scope is an indicating panel, which is indicated by a different color indicator light or an LCD panel when the voltage is normal, the voltage is insufficient, or the capacity is insufficient. For example, the apparatus for automatically detecting the abnormality of the capacitor tripping device described in claim 9 of the patent scope, wherein the timing of the timing automatic detecting loop is controlled by an external point to adjust the set time of the automatic detecting.