TWM511706U - Device for automatically detects abnormal of capacitor trip device - Google Patents

Description

Device for automatically detecting abnormality of capacitor tripping device

This case is an automatic detection and improvement device for the capacitor tripping device, especially for the improved device with clear appearance, easy to install and easy to identify and has an external warning contact, and an internal automatic detection circuit to enhance the power supply quality.

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 (H.V.CB) is an instruction to receive a relay. As a way to jump off the high-voltage circuit breaker, the main power supply line (in Taiwan, the power supply main line of Taiwan Power Company) will be 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 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. The decay of the capacitance time will cause the capacitor tripping device to be disabled. If there is no warning, indication and warning device function, the high voltage disc will cause the system to malfunction. The tripping loop has no working power, and the accident point cannot be isolated. Serious situation.

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 a normal, low voltage, and insufficient capacity display panel on the panel. 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 light groups on the panel is three different color display light groups for identification. One of the best choices for warning lights is a flashing indicator. 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 flashing light and the fault state warning contact can be used as various monitoring and control to solve the problem that the capacitor tripping device is not known.

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‧‧‧ 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

40‧‧‧Comparative voltage loop

41‧‧‧Internal set time circuit

42‧‧‧ cooling fan

The first figure is a schematic diagram of the stereoscopic body of the device for automatically detecting the abnormality of the capacitor jumping device.

Figure 2 is a schematic diagram of the rear end wiring fixing plate of the device for automatically detecting the abnormality of the capacitor jumping device.

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

Figure 4 is a schematic diagram of the actual capacity loop detection of the device for automatically detecting the abnormality of the capacitor trip device.

Figure 5 is a comparison circuit control diagram of the device for automatically detecting the abnormality of the capacitor tripping device.

Figure 6 is a diagram showing the timing capacity detection of the device that automatically detects the abnormality of the capacitor trip device.

Figure 7 is a circuit diagram of the control circuit component of the device for automatically detecting the abnormality of the capacitor tripping device.

The device automatically detects the abnormality of the capacitor tripping device, and the preferred embodiment is implemented as shown in FIG. 1 and refers to FIG. 2, which has a three-dimensional box-shaped body 10; The 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 tripping device (CTD) control circuit component 20, a comparison voltage loop 40, and an internal set time circuit 41 are fixed in the body 10 of the capacitor tripping 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 In order to use the contacts of 1a, 1b, 2C, 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 voltage circuit 40 (block 54), the indicator light group 33 will be illuminated (block 55) except for the low voltage state in the panel 11. In addition, the flashing light 32 is also activated (block 56), and the detecting switch 37 is actuated, 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 Figs. 4 and 5, the time circuit 41 is set inside the device of the present invention (block 60), and a pulse such as every 4 sec can be continuously outputted 24 hours a day and night, as shown in Fig. 4, and When a detection port 37 is driven (block 61), when the detection port 37 is activated, the detection circuit shown in Fig. 7 is interlocked with the manual PBL, and the manual test is cut off (block 62) to prevent the occurrence of a short circuit condition. The manner of the pulse action can also be generated by an external control point 36 (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 voltage circuit 40 (block 51). If it is higher than the set voltage value (block 52), face The state of the board 11 indicates that the normal light in the display group 33 is on (block 53); if the DC voltage of the DC output terminal 22 is lower than the set voltage value of the comparison voltage loop 40 (block 54), then the capacity is insufficient in the panel 11 In addition to indicating that the light group 33 is on (block 55), the panel 32 is flashing to display the light 32 (block 56), and the detecting switch 37 is actuated, the dry contact (A contact) is guided, and the capacity is insufficient. Output contact 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 interpret, all states are clearly visible on the panel surface, and the indicator lamp group with clear indication and the blinking display lamp are clearly displayed. 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‧‧‧ panel

25‧‧‧ buckle switch

26‧‧‧ vents

27‧‧‧Replaceable fuse set FUSE

29‧‧‧Terminal group

30‧‧‧Electric meter

31‧‧‧ display lights

32‧‧‧ flashing lights

33‧‧‧Status indicator light group

38‧‧‧Fixed holes

Claims (6)

An apparatus for automatically detecting an abnormality of a capacitive tripping device comprises: a box-shaped body having a panel; a latching switch fixed to the panel and an electric meter; and a control circuit component fixed in the body, having a 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 power is rectified and transformed into an appropriate working DC power; the control circuit component is provided with an electric circuit electrically connected to the main power supply end of the main circuit The electric switch is locked with the latch switch to prevent the line from being accidentally pressed when the line is energized, and the capacitor tripping device is not burned, and the circuit breaker at the main power supply end does not trip; The control circuit component has a set of comparison voltage loops. When the voltage is lower than the set voltage value, the device that drives the capacitor trip device with low voltage abnormality is driven; the internal set time circuit, within the set value of the time, drives a group of auxiliary powers when the voltage is insufficient.驿 容量 容量 容量 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 警 The device for automatically detecting the abnormality of the capacitor jumping device according to the first aspect of the patent application, 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 capacitor inside the control circuit component can be forcibly discharged. When the voltage is lowered, the indicator unit will be driven and the warning contact will be turned on. For example, the device for automatically detecting the abnormality of the capacitor tripping device described in the first claim of the patent scope includes Included: an illumination test button switch is disposed on the panel; and an automatic detection circuit disposed inside the body; when the illumination test button switch is actuated, the capacitance inside the control circuit component is forcibly discharged, When the voltage is lowered by the set value, the indicating unit will be driven and the warning contact will be turned on. The device for automatically detecting the abnormality of the capacitor tripping device according to the first aspect of the patent application, the indicating unit provided on the panel includes indicating means for displaying normal, low voltage and insufficient capacity. The device for automatically detecting the abnormality of the capacitor tripping device described in claim 1 of the patent scope further includes a set of internal set time circuit for automatically forcing the capacitor to discharge a time value within a set time, when the voltage inside the control circuit component is low When the voltage value is set, the indicating unit will be driven and the warning contact will be turned on, and the external control point can be forced to operate. The device for automatically detecting the abnormality of the capacitor jumping device according to the first aspect of the patent application, the panel is an indicating panel, and is indicated by a display lamp or an LCD panel of different colors when the voltage is normal, the voltage is insufficient, or the capacity is insufficient.