WO2015075885A1 - 負荷試験装置 - Google Patents
負荷試験装置 Download PDFInfo
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- WO2015075885A1 WO2015075885A1 PCT/JP2014/005601 JP2014005601W WO2015075885A1 WO 2015075885 A1 WO2015075885 A1 WO 2015075885A1 JP 2014005601 W JP2014005601 W JP 2014005601W WO 2015075885 A1 WO2015075885 A1 WO 2015075885A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
Definitions
- the present invention relates to a load test apparatus.
- Patent Document 1 a device for stopping energization of a resistor when a current flowing through the resistor is abnormal in a load test has been proposed.
- an object of the present invention is to provide a load test apparatus capable of appropriately detecting an internal abnormality.
- a load test apparatus includes one or more resistor groups having a plurality of resistors, a resistance unit connected to a test target power source for a load test, a cooling fan that cools the resistors of the resistance unit, A control unit, and the resistor unit detects a current flowing through the resistor unit or a current / voltage detection unit that detects an applied voltage and an exhaust temperature downstream of the resistor unit.
- a temperature detection unit, and the cooling fan includes a rotation state detection unit that detects a rotation state of the cooling fan
- the control unit includes information from the current / voltage detection unit, information from the temperature detection unit, and Based on the information from the rotation state detection unit, off control for stopping the power supply from the test target power source to the resistance unit is performed.
- control unit Since the control unit detects the cooling fan operation status by the rotation status detection unit, the current or voltage status by the current / voltage detection unit, and the exhaust temperature by the temperature detection unit, the control unit performs off control, so there is a problem with the load test device When this occurs, the power supply from the power source to be tested to the load test apparatus (resistor unit) is stopped. For this reason, it is possible to appropriately detect abnormality inside the load test apparatus and prevent further failure of the load test apparatus (particularly, the resistance unit).
- a current / voltage warning unit indicating that the off control is based on information from the current / voltage detection unit and / or light and sound, and the off control is based on information from the temperature detection unit.
- a temperature warning unit indicating that the light is at least one of light and sound, and a cooling fan warning unit indicating that the off control is based on information from the rotation state detection unit. And further comprising.
- the resistance unit includes two or more resistor groups, and includes two or more selection switches used to select whether or not to supply power from the power source to be tested to the resistor groups.
- a voltage / voltage detector is provided for each resistor group, and a lighting device is provided in the vicinity of each of the two or more selection switches as a current / voltage warning unit.
- the failure may be a malfunction of the cooling fan, a failure of the resistance section (and which resistor group is a failure), or any other failure (or an overall failure) ) Or the like can be visually recognized, and the defect can be easily improved.
- the current value flowing through the resistor group or the voltage value applied to the resistor group is the value during normal operation. It is determined whether or not it is within the range, and for the resistor group that is not subject to power supply from the power source to be tested, whether or not current flows through the resistor group or voltage is applied to the resistor group. It is determined whether or not.
- the exhaust outlet downstream of the resistance portion is provided with an exhaust lid that is opened during use, and the exhaust outlet or the exhaust lid is provided with an exhaust opening detection portion that detects an open / closed state of the exhaust lid, Performs off control based on information from the current / voltage detection unit, information from the temperature detection unit, information from the rotation state detection unit, and information from the exhaust opening detection unit.
- the intake port of the cooling fan is provided with an intake lid that opens during use, and the intake port or the intake lid is provided with an intake opening detection unit that detects an open / closed state of the intake lid.
- / Off control is performed based on the information from the voltage detection unit, the information from the temperature detection unit, the information from the rotation state detection unit, the information from the exhaust opening detection unit, and the intake opening detection unit.
- the exhaust lid is opened by driving the actuator, and after the time required for the exhaust lid to open by the actuator has elapsed after the main power source of the load test apparatus is turned on, Off control is started.
- a load test apparatus includes one or more resistor groups having a plurality of resistors, a resistance unit connected to a test target power source for a load test, a cooling fan that cools the resistors of the resistance unit, And an exhaust lid that opens at the time of use at the exhaust outlet downstream of the resistance section, and an exhaust opening detector that detects the open / closed state of the exhaust lid is provided at the exhaust outlet or exhaust lid.
- the unit includes at least one of a resistor, a group of resistors, information on a current flowing through the resistor unit or an applied voltage, information on an exhaust temperature downstream of the resistor unit, information on a rotation state of the cooling fan, and exhaust Based on the information from the opening detection unit, off control for stopping the power supply from the power source to be tested to the resistance unit is performed.
- the off control is performed based on information on a current flowing from the driving power supply that supplies power for driving the cooling fan to the power supply line or a voltage applied from the driving power supply to the load test apparatus via the power supply line.
- a protective relay is further provided.
- the power supply source (auxiliary power supply and cable) is detected abnormally, and the auxiliary power supply operates normally.
- the power supply source auxiliary power supply and cable
- the load test apparatus 1 in the first embodiment includes a cooling fan 10, a resistance unit 20, a housing 30, a main switch 50, an operation unit 60, and a control unit 80, and a load of a power supply device (test target power supply) such as a generator. Used to perform tests (see FIGS. 1-6).
- a power supply device such as a generator. Used to perform tests (see FIGS. 1-6).
- the cooling fan 10 is a device that sends cooling air to the resistance unit 20, and the resistance unit 20 is disposed above the cooling fan 10.
- the cooling fan 10 is provided with a rotation state detection unit 10a that detects the rotation state of the fan, such as a fiber sensor, a laser sensor, a photoelectric sensor, or a wind pressure sensor.
- a rotation state detection unit 10a that detects the rotation state of the fan, such as a fiber sensor, a laser sensor, a photoelectric sensor, or a wind pressure sensor.
- the rotation state detection unit 10 a detects the rotation speed of the cooling fan 10 and transmits information related to the rotation speed to the control unit 80.
- the resistance unit 20 includes a plurality of bar-shaped resistors extending in the horizontal direction at predetermined intervals, and one or more resistors connected in series or in parallel are provided. Is supplied with power from the power source to be tested to a part or all of the resistor group.
- the resistor is not limited to one composed of heating wires, but may be one that can store electric power inside a battery or the like.
- the resistor unit 20 is connected to a bus bar or an electric cable connected to a resistor, such as an ammeter or a voltmeter, and detects a current flowing through the resistor or a voltage applied to the resistor.
- a temperature detection unit 20b that detects the exhaust temperature above the resistance unit 20 is provided.
- the current / voltage detection unit 20a detects a current flowing through the resistor or a voltage applied to the resistor, and transmits information on the current or voltage to the control unit 80.
- the current / voltage detection unit 20a is preferably arranged for each resistor group. However, the current / voltage detection unit 20a is set to 1 before the power supplied from the power source to be tested via the main switch 50 is distributed to each resistor group. Only one may be arranged. Moreover, the form by which the electric current / voltage detection part 20a is arrange
- the power source to be tested is a three-phase AC power source
- a configuration may be adopted in which only three powers are provided for each of the U phase, the V phase, and the W phase in a portion before the power supplied from the test target power supply via the main switch 50 is distributed to each resistor group. .
- resistor groups with a rated capacity of 5 kW (first resistor group G1, second resistor group G2) and two resistor groups with 10 kW are used for a load test of a three-phase AC power supply.
- An example is shown in which a total of four resistor groups (third resistor group G3, fourth resistor group G4) are provided.
- Each resistor group includes two resistors (first resistor R 1 and second resistor R 2 ) connected in series for the U phase connected to the R phase terminal of the test target power source, and the test target power source.
- Two resistors (third resistor R 3 and fourth resistor R 4 ) connected in series for the V phase connected to the S phase terminal of W, and for the W phase connected to the T phase terminal of the power source to be tested
- Two resistors connected in series (fifth resistor R 5 , sixth resistor R 6 ), between the first resistor R 1 and the second resistor R 2 , and the third resistor R 3 and between the fourth resistor R 4, a switching device (relay) SW is provided between the fifth resistor R 5 of the sixth resistor R 6.
- the switching device SW is on / off controlled in response to an on / off operation of a first switch S1 to a fourth switch S4, which will be described later, so that a current flows through the corresponding resistor in the on state.
- the switching device SW may be a triple switch in which a U-phase relay, a V-phase relay, and a W-phase relay are operated on and off in conjunction with each other.
- a continuous switch may be used.
- One terminal of the second resistor R 2 in each of the resistor group is connected to a U-phase line UB extending from the U-phase terminal U 1 to be connected to the R phase terminal under test power supply, a fourth resistor R 4 one terminal of is connected to the V-phase line VB which extends from the V-phase terminal V 1 to be connected to the S phase terminal tested power, one terminal of the sixth resistor R 6 is, T phase tested power It is connected to the W-phase line WB extending from the W-phase terminal W 1 to be connected to the terminal.
- One terminal of the first resistor R 1 , one terminal of the third resistor R 3 , and one terminal of the fifth resistor R 5 in each resistor group are short-circuited.
- the number of resistor groups, each rated voltage and rated capacity, and the wiring of the resistors and switching device SW are not limited to the above-described configuration.
- a current meter for U phase it is provided at a portion connecting the first resistor R 1 of the switching device SW in each resistor group, ammeter for the V-phase is provided at a portion connecting the third resistor R 3, ammeter for W phase is considered a form provided in a portion connected to the fifth resistor R 5.
- the number of resistor groups, the rated voltage and rated capacity of each, the wiring of resistors, and the arrangement of ammeters and voltmeters are not limited to those described above.
- the current / voltage detection unit 20a may be configured to detect at least one of current and voltage, but in order to accurately detect an abnormality, a mode of detecting both current and voltage is desirable.
- the temperature detection unit 20 b detects the exhaust temperature at the upper part (downstream) of the resistance unit 20 and transmits information related to the exhaust temperature to the control unit 80.
- the housing 30 is a case for holding a load testing device such as the cooling fan 10, the resistance unit 20, the main switch 50, the operation unit 60, and the control unit 80.
- An intake port 31 is provided on the side surface (upstream) of the casing 30 below the cooling fan 10, and an exhaust port 33 is provided above (downstream) the resistor portion 20.
- the intake port 31 is provided with an intake lid 32 that is opened during use and closed when not in use, and the exhaust port 33 is provided with an exhaust lid 34 that is opened during use and closed when not in use.
- the intake lid 32 opens and closes via a first actuator 32a that operates in conjunction with the on / off operation of the operation unit 60.
- the intake lid 32 includes a proximity sensor, a limit switch, and the like, and is provided with an intake opening detection unit 32b that detects whether the intake lid 32 is open or closed, that is, whether the intake port 31 is open.
- an intake opening detection unit 32b that detects whether the intake lid 32 is open or closed, that is, whether the intake port 31 is open.
- the intake opening detection unit 32b detects whether or not the intake lid 32 is open, and transmits information regarding whether or not the intake lid 32 is open to the control unit 80. However, it may be configured to detect the opening / closing degree of the intake lid 32 more finely.
- the exhaust lid 34 opens and closes via a second actuator 34 a that operates in conjunction with the on / off operation of the operation unit 60.
- the exhaust lid 34 includes a proximity sensor, a limit switch, and the like, and is provided with an exhaust opening detection unit 34b that detects whether the exhaust lid 34 is opened or closed, that is, whether the exhaust port 33 is open. Note that the exhaust lid 34 may be manually opened and closed without being limited to automatic opening and closing using the second actuator 34a.
- the exhaust opening detection unit 34b detects whether or not the exhaust lid 34 is open, and transmits information regarding whether or not the exhaust lid 34 is open to the control unit 80. However, it may be configured to detect the opening / closing degree of the exhaust lid 34 more finely.
- the intake lid 32 and the exhaust lid 34 are described as being configured with hinged doors, but may be configured with other door structures such as sliding doors.
- the main switch 50 is composed of a vacuum circuit breaker (VCB: Vacuum Circuit Breaker) or the like, and is connected between the resistance unit 20 and the power source to be tested (on the U-phase line UB, on the V-phase line VB, on the W-phase) Provided on the main line WB), power from the test target power source is supplied to the resistor unit 20 in the on state, and power supply from the test target power source to the resistor unit 20 is stopped in the off state.
- VVB Vacuum Circuit Breaker
- the main switch 50 While the load test apparatus 1 is operating normally, the main switch 50 is turned on, but the control unit 80 is one of the members constituting the load test apparatus 1 based on information from each detection unit. When it is determined that is not operating normally (when an abnormality is detected), the main switch 50 is turned off, that is, the off control for stopping the power supply from the power source to be tested to the resistance unit 20 is performed. Done.
- an on / off operation switch 60a for turning on or off the power supply of the load test apparatus 1 and a load amount are adjusted (a resistor group that supplies power from the test target power supply is selected. )
- a selection switch 60b (first switch S1 to fourth switch S4) is provided.
- the first actuator 32a When the on / off operation switch 60a is operated to turn on the main power supply of the load test apparatus 1, the first actuator 32a is turned on based on the power supplied from the drive power supply (auxiliary power supply) of the load test apparatus. In operation, the intake lid 32 opens, the second actuator 34a operates, and the exhaust lid 34 opens. The fan of the cooling fan 10 rotates, and the air taken in from the opening of the intake lid 32 is sent to the upper resistance unit 20. Further, based on the power supplied from the driving power source (auxiliary power source) of the load test apparatus, the control unit 80, the rotation state detection unit 10a, the current / voltage detection unit 20a, the temperature detection unit 20b, and the intake opening detection unit 32b. The exhaust opening detector 34b is activated.
- An on / off switch for the cooling fan 10 is provided separately from the on / off operation switch 60a, and the on / off switch for the cooling fan 10 is turned on when the on / off operation switch 60a is operated to turn on the main power supply of the load test apparatus 1.
- a mode in which the switch is operated to start rotation of the cooling fan 10 may be employed.
- the selector switch 60b (the first switch S1 to the fourth switch S4) is operated so that the resistance unit 20 can be energized.
- the switch 50 is turned on, the switching device SW of the resistor group corresponding to the selection switch 60b (such as the first switch S1) selected to be energized is turned on, and the power supply to be tested is connected via the main switch 50 Therefore, electric power is supplied to the resistor group that can be energized in the resistance unit 20.
- the first switch S1 and the second switch S2 when the first switch S1 and the second switch S2 are turned on and the third switch S3 and the fourth switch S4 are turned off, the first switch S1 and the second switch S2 correspond to the first switch S1 and the second switch S2.
- the switching devices SW of the first resistor group G1 and the second resistor group G2 having the rated capacity of 5 kW are turned on, and power from the power supply to be tested is supplied to the first resistor group G1 and the second resistor group G2.
- the third resistor group G3 having a rated capacity of 10 kW corresponding to the third switch S3 and the fourth switch S4 and the switching device SW of the fourth resistor group G4 are turned off, and the third resistor group G3
- the fourth resistor group G4 is not supplied with power from the test target power source.
- the operation unit 60 includes an intake lid warning unit 61a, an exhaust lid warning unit 61b, a cooling fan warning unit 61c, a current / voltage warning unit 61d, and a temperature warning unit 61e.
- the voltage warning unit 61d and the temperature warning unit 61e perform warning output.
- the intake lid warning unit 61a is provided in the vicinity of the “intake lid” column provided in the operation unit 60.
- the intake lid warning unit 61a is lit for warning, and the off control detects the intake opening detection. The fact that it is based on the information from the part 32b is indicated by light.
- the exhaust lid warning unit 61b is provided in the vicinity of the “exhaust lid” column provided in the operation unit 60. When the exhaust lid 34 is not fully opened, the exhaust lid warning unit 61b is lit for warning and the off control is performed to detect the exhaust opening. Light indicates that the information is based on information from the unit 34b.
- the cooling fan warning unit 61c is provided in the vicinity of the “cooling fan” column provided in the operation unit 60.
- the cooling fan warning unit 61c is turned on for warning, and the OFF control is in the rotation state. Light indicates that the information is based on information from the detection unit 10a.
- the first warning unit 61d1 to the fourth warning unit 61d4 included in the current / voltage warning unit 61d are provided in the vicinity of the first switch S1 to the fourth switch S4, respectively, and correspond to the first switch S1 to the fourth switch S4.
- the current / voltage detection unit Light indicates that it is based on information from 20a.
- the first warning unit 61d1 provided near the first switch S1 in the current / voltage warning unit 61d. Is turned on for warning, and light indicates that the off control is based on information from the current / voltage detector 20a provided in the first resistor group G1.
- the temperature warning unit 61e is provided in the vicinity of the “exhaust temperature” column provided in the operation unit 60. When the exhaust temperature is high and the resistor is not normally cooled, the temperature warning unit 61e is lit for warning and the off control is performed. It is indicated by light that it is based on information from the temperature detection unit 20b.
- All of the intake lid warning unit 61a, the exhaust lid warning unit 61b, the cooling fan warning unit 61c, the current / voltage warning unit 61d, and the temperature warning unit 61e operate normally in addition to warning lighting (for example, red lighting). It may be configured to light in another color (for example, light in green).
- the control unit 80 is a device that controls each part of the load test apparatus 1 such as the switching device SW, the cooling fan 10, and the main switch 50.
- the operation state of the cooling fan 10 by the rotation state detection unit 10a the current / voltage detection unit.
- the operation state of the resistance unit 20 by 20a current flowing through the resistor group and the state of applied voltage
- the openings (intake port 31 and exhaust port 33) in the casing 30 by the intake opening detection unit 32b and the exhaust opening detection unit 34b.
- the exhaust temperature downstream of the resistor 20 by the temperature detector 20b are detected, and then the main switch 50 is turned off (power supply from the test target power supply to the resistor 20 is turned off).
- control unit 80 includes information from the intake opening detection unit 32b, information from the exhaust opening detection unit 34b, information from the rotation state detection unit 10a (information about the rotation state of the cooling fan 10), and current / voltage detection unit 20a. OFF control is performed on the basis of information (information on the current flowing through the resistor or the voltage applied to the resistor) and information from the temperature detection unit 20b (information on the exhaust temperature downstream of the resistor). .
- step S11 to S20 The procedure of the off control by the control unit 80 will be described using the flowchart of FIG.
- the control in steps S11 to S20 is performed for a predetermined time (for example, every minute) until the off control is performed after the main power supply of the load test apparatus 1 is turned on. Note that, after the time required for the intake lid 32 and the exhaust lid 34 to be opened by the first actuator 32a and the second actuator 34a has passed, not immediately after the main power supply of the load test apparatus 1 is turned on, It is desirable to start the procedure such as step S11.
- the control unit 80 determines whether or not the intake lid 32 is sufficiently open based on the information regarding the open / close state of the intake lid 32 from the intake opening detection unit 32b (see step S11), and determines that the intake lid is not open. In this case, the main switch 50 is turned off, and the power supply from the test target power supply to the resistance unit 20 of the load test apparatus 1 is stopped. Further, a warning that “the intake port 31 is not normally opened” is given (see step S12).
- a mode in which the intake lid warning unit 61a provided in the vicinity of the “intake lid” column in the operation unit 60 can be considered (see FIG. 5).
- a display device 70 capable of displaying characters may be provided on the operation unit 60 and the like, and a message “Please open the intake lid because the intake port is not fully open” may be displayed. (See FIG. 6).
- the control unit 80 determines whether or not the exhaust lid 34 is sufficiently open based on the information on the open / close state of the exhaust lid 34 from the exhaust opening detection unit 34b (see step S13), and determines that the exhaust lid 34 is not open. In this case, the main switch 50 is turned off, and the power supply from the test target power supply to the resistance unit 20 of the load test apparatus 1 is stopped. Further, a warning that “the exhaust port 33 is not normally opened” is given (see step S14).
- the exhaust lid warning unit 61b provided in the vicinity of the “exhaust lid” column in the operation unit 60 can be considered.
- a display device 70 capable of displaying characters may be provided on the operation unit 60 or the like, and a message such as “Open the exhaust lid because the exhaust port is not fully open” may be displayed. .
- the control unit 80 determines whether or not the cooling fan 10 is operating sufficiently based on the information regarding the number of rotations of the cooling fan 10 from the rotation state detection unit 10a (for example, the number of rotations of the cooling fan 10 rotates more than a threshold value). (Refer to step S15), and when it is determined that it is not operating, the main switch 50 is turned off, and the power from the power source to be tested to the resistance unit 20 of the load test apparatus 1 Stop supplying. Further, a warning that “the cooling fan 10 is not operating normally” is given (see step S16).
- a mode in which the cooling fan warning unit 61c provided in the vicinity of the “cooling fan” column in the operation unit 60 can be considered. Further, a display device 70 capable of displaying characters is provided on the operation unit 60 and the like, and a message “Please check the cooling fan because the cooling fan is not operating sufficiently” is displayed. Also good.
- the control unit 80 For each resistor group supplied with power from the test target power supply, the control unit 80 is based on the information about the current flowing through the resistor group from the current / voltage detection unit 20a or the voltage applied to the resistor group. When it is determined whether the current flowing through the resistor group or the voltage applied to the resistor group is within the normal operation range (see step S17), and when it is determined that the current is out of the normal operation range Then, the main switch 50 is turned off, and the power supply from the test target power supply to the resistance unit 20 of the load test apparatus 1 is stopped. In addition, a warning that “the current value flowing through the resistor group or the voltage value applied to the resistor group is not normal” is issued (see step S18).
- the determination in step S17 may be a mode in which current detection or voltage detection is performed only for the resistor group selected as the power supply target by operating the selection switch 60b (first switch S1 to fourth switch S4).
- current detection and voltage detection are also performed for the resistor group selected as not being supplied with power by operating the selection switch 60b (the first switch S1 to the fourth switch S4). It is also possible to check whether a voltage is applied.
- a malfunction occurs in the current / voltage warning unit 61d (first warning unit 61d1 to fourth warning unit 61d4) provided in the vicinity of the first switch S1 to the fourth switch S4 in the operation unit 60. It is possible to turn on the one corresponding to the resistor group. Further, a display device 70 capable of displaying characters is provided in the operation unit 60 or the like, for example, “the value of the current flowing through the first resistor group corresponding to the first switch or the voltage value applied to the resistor group is The message “Please check the first resistor group because it is not normal.” May be displayed.
- the control unit 80 determines whether or not the exhaust temperature exceeds the temperature threshold based on the information regarding the exhaust temperature from the temperature detection unit 20b (see step S19).
- the switch 50 is turned off, and the power supply from the power source to be tested to the resistance unit 20 of the load test apparatus 1 is stopped. Further, a warning that “the resistor is not properly cooled” is given (see step S20).
- a form in which the temperature warning unit 61e provided near the “exhaust temperature” column in the operation unit 60 is turned on can be considered. Further, a display device 70 capable of displaying characters is provided in the operation unit 60 or the like, and a message “Please check each part because the resistor is not properly cooled.” Is displayed. Good.
- the cooling fan 10 When the load test apparatus 1 is operating normally, the cooling fan 10 is sucked from the opening (intake port 31) where the intake lid 32 is opened, and the ventilation from the cooling fan 10 passes through the resistance unit 20, The exhaust lid 34 is discharged from an opening (exhaust port 33).
- the cooling fan 10 is operating normally, and the current flowing through the resistor or the applied voltage is within a normal range, the resistor is cooled by air blown from the cooling fan 10. Then, the hot air is discharged from the exhaust port 33, and the load test can be performed safely.
- the resistor If the resistor is damaged or dust adheres, the current flowing through the resistor increases (or the voltage applied to the resistor increases) due to a short circuit or the like, and the cooling fan 10 operates normally. However, the resistor becomes difficult to be cooled.
- the cooling fan 10 Even if each device is operating normally, the cooling fan 10 is within the normal operation range, but the rotation speed is low (close to the lower limit value of the normal operation range), and the current flowing through the resistor also operates normally. If the cooling capacity is low and the temperature of the object to be cooled is high, such as the current value is high within the range (close to the upper limit of the normal operating range), the resistor may be difficult to cool. . In addition, even when a foreign substance is mixed into the resistor unit 20 and the like, the cooling fan 10 operates normally, and a current in a normal range flows through the resistor group, the resistor may not be easily cooled.
- the control unit 80 controls the operation state of the cooling fan 10 by the rotation state detection unit 10a, the current or voltage state of the energized resistor group by the current / voltage detection unit 20a, the intake opening detection unit 32b, and the exhaust.
- the opening detection unit 34b After detecting the opening state of the opening (intake port 31 and exhaust port 33) in the housing 30 by the opening detection unit 34b and the exhaust temperature downstream of the resistance unit 20 (near the exhaust port 33) by the temperature detection unit 20b, In order to perform the off control of the switch 50, when a problem occurs in the load test apparatus 1, the power supply from the test target power supply to the load test apparatus 1 (resistor unit 20) is stopped. For this reason, it is possible to appropriately detect abnormality in the load test apparatus 1 and prevent further failure of the load test apparatus 1 (particularly, the resistance unit 20).
- the temperature detection unit 20b detects that the exhaust temperature is higher than the normal value. It is possible to detect anomalies as a whole.
- control unit 80 relates to the information about the current flowing through the resistor, the resistor group, or the resistor unit 20 or the applied voltage, the information about the exhaust temperature downstream of the resistor unit 20, and the rotation state of the cooling fan 10. Based on at least one of the information and information from the exhaust opening detection unit 34b, an off control for stopping power supply from the power source to be tested to the resistance unit 20 may be performed.
- a warning using the intake lid warning unit 61a or the like is given, and the location of the malfunction is indicated, so that it may be a problem of the opening of the lid, the malfunction of the cooling fan 10, or the malfunction of the resistance unit 20 (and which one) It is possible to visually check whether there is a defect in the resistor group) or other defects (or an overall defect), and there is an advantage that the defect can be easily improved.
- the load test apparatus 1 can be applied to a low-voltage load test apparatus corresponding to a low-voltage power supply as shown in FIG. 7, or can be applied to a high-voltage power supply as shown in FIG. It can also be applied to a high-pressure load test apparatus.
- the warning may be in the form of an output using light to make the user visually recognize, may be in the form of audio output, or may be in the form of warning using both.
- auxiliary power supply drive power supply for the load test apparatus
- the off control may be performed.
- each part of the load test apparatus 1 (cooling fan 10, rotation state detection unit 10a, current / voltage detection unit 20a, temperature detection unit 20b, first actuator 32a, intake opening detection unit 32b, first unit from the auxiliary power supply 2, a protective relay 90 is provided on a power line for supplying power to the actuator 34a, the exhaust opening detector 34b, and the controller 80 (particularly on the power line to the cooling fan 10).
- the protective relay 90 detects a voltage applied to the load test apparatus 1 (such as the cooling fan 10) via the power line or a current flowing through the power line.
- the protective relay 90 When the detected voltage value or current value is outside the predetermined range, the protective relay 90 is turned off via the control unit 80 (or directly without going through the control unit 80). In other words, off control is performed to stop the power supply from the power source to be tested to the resistance unit 20.
- the warning may be in a form in which characters are displayed on the display device 70 to indicate an abnormality in power supply from the driving power supply, or in a form in which a warning part other than the intake lid warning part 61a is provided.
- the warning unit 61a, the exhaust lid warning unit 61b, the cooling fan warning unit 61c, the current / voltage warning unit 61d, and the temperature warning unit 61e may all be lit to notify the abnormality.
- each part of the load test apparatus 1 may not operate correctly, such as the cooling fan 10 does not rotate sufficiently, sensors such as the rotation state detection unit 10a do not operate correctly, and the control unit 80 does not operate correctly.
- the load test cannot be performed normally.
- abnormality detection of the power supply source is performed based on the power supply state from the auxiliary power supply that drives each part of the load test apparatus 1, and normal operation is performed from the auxiliary power supply.
- power supply source auxiliary power supply or cable
Abstract
Description
抵抗器は、電熱線で構成されたものに限らず、バッテリーなど内部に電力を蓄積出来るものであってもよい。
スイッチング装置SWは、図3のように、U相用のリレーとV相用のリレーとW相用のリレーが連動してオンオフ動作する三連スイッチでもよいし、それぞれが単独でオンオフ動作する単連スイッチであってもよい。
また、操作部60などに、文字表示が可能な表示装置70を設けて、「吸気口が十分に開いていないので、吸気蓋を開けてください。」というメッセージを表示させる形態であってもよい(図6参照)。
また、操作部60などに、文字表示が可能な表示装置70を設けて、「排気口が十分に開いていないので、排気蓋を開けてください。」というメッセージを表示させる形態であってもよい。
また、操作部60などに、文字表示が可能な表示装置70を設けて、「冷却ファンが十分に動作していないので、冷却ファンを確認してください。」というメッセージを表示させる形態であってもよい。
また、操作部60などに、文字表示が可能な表示装置70を設けて、たとえば、「第1スイッチに対応する第1抵抗器群に流れる電流値若しくは、抵抗器群に印加された電圧値が正常ではないので、第1抵抗器群を確認してください。」というメッセージを表示させる形態であってもよい。
また、操作部60などに、文字表示が可能な表示装置70を設けて、「抵抗器が正常に冷却されていないので、各部を確認してください。」というメッセージを表示させる形態であってもよい。
警告は、駆動用電源からの電力供給異常を示すために、表示装置70に文字表示させる形態や、吸気蓋警告部61aなどとは別の警告部を設ける形態であってもよいし、吸気蓋警告部61a、排気蓋警告部61b、冷却ファン警告部61c、電流/電圧警告部61d、温度警告部61eの総てを点灯させて、異常を知らせる形態であってもよい。
10 冷却ファン
10a 回転状態検知部
20 抵抗部
20a 電流/電圧検知部
20b 温度検知部
30 筐体
31 吸気口
32 吸気蓋
32a 第1アクチュエータ
32b 吸気開口検知部
33 排気口
34 排気蓋
34a 第2アクチュエータ
34b 排気開口検知部
50 メインスイッチ
60 操作部
60a オンオフ操作スイッチ
60b 選択スイッチ
61a 吸気蓋警告部
61b 排気蓋警告部
61c 冷却ファン警告部
61d 電流/電圧警告部
61d1~61d4 第1警告部~第4警告部
61e 温度警告部
70 表示装置
80 制御部
90 保護継電器
G1~G4 第1抵抗器群~第4抵抗器群
R1~R6 第1抵抗器~第6抵抗器
S1~S4 第1スイッチ~第4スイッチ
SW スイッチング装置
U1 U相端子
UB U相用線
V1 V相端子
VB V相用線
W1 W相端子
WB W相用線
Claims (9)
- 複数の抵抗器を有する抵抗器群を1以上含み、負荷試験用に試験対象電源と接続される抵抗部と、
前記抵抗部の抵抗器を冷却する冷却ファンと、
制御部とを備え、
前記抵抗部には、前記抵抗器、若しくは前記抵抗器群、若しくは前記抵抗部に流れる電流若しくは印加された電圧を検知する電流/電圧検知部と、前記抵抗部の下流における排気温度を検知する温度検知部とが設けられ、
前記冷却ファンには、前記冷却ファンの回転状態を検知する回転状態検知部が設けられ、
前記制御部は、前記電流/電圧検知部からの情報、前記温度検知部からの情報、および前記回転状態検知部からの情報に基づいて、前記試験対象電源から前記抵抗部への電力供給を停止するオフ制御を行うことを特徴とする負荷試験装置。 - 前記オフ制御が、前記電流/電圧検知部からの情報に基づくものであることを、光と音の少なくとも一方で示す電流/電圧警告部と、
前記オフ制御が、前記温度検知部からの情報に基づくものであることを、光と音の少なくとも一方で示す温度警告部と、
前記オフ制御が、前記回転状態検知部からの情報に基づくものであることを、光と音の少なくとも一方で示す冷却ファン警告部とを更に備えることを特徴とする請求項1に記載の負荷試験装置。 - 前記抵抗部は、前記抵抗器群を2以上有し、
前記抵抗器群に、前記試験対象電源からの電力を供給するか否かを選択するために使用される選択スイッチを前記2以上備え、
前記電流/電圧検知部は、前記抵抗器群ごとに設けられ、
前記電流/電圧警告部として、点灯装置が、前記2以上の選択スイッチのそれぞれの近傍に設けられることを特徴とする請求項2に記載の負荷試験装置。 - 前記選択スイッチを介して、前記試験対象電源からの電力供給対象に選択された抵抗器群については、前記抵抗器群を流れる電流値若しくは前記抵抗器群に印加された電圧値が正常動作時の範囲内であるか否かが判断され、前記試験対象電源からの電力供給対象外とされた抵抗器群については、前記抵抗器群に電流が流れているか否か若しくは前記抵抗器群に電圧が印加されているか否かが判断されることを特徴とする請求項3に記載の負荷試験装置。
- 前記抵抗部の下流の排気口には、使用時に開く排気蓋が設けられ、
前記排気口若しくは前記排気蓋には、前記排気蓋の開閉状態を検知する排気開口検知部が設けられ、
前記制御部は、前記電流/電圧検知部からの情報、前記温度検知部からの情報、前記回転状態検知部からの情報、および前記排気開口検知部からの情報に基づいて、前記オフ制御を行うことを特徴とする請求項1に記載の負荷試験装置。 - 前記冷却ファンの吸気口には、使用時に開く吸気蓋が設けられ、
前記吸気口若しくは前記吸気蓋には、前記吸気蓋の開閉状態を検知する吸気開口検知部が設けられ、
前記制御部は、前記電流/電圧検知部からの情報、前記温度検知部からの情報、前記回転状態検知部からの情報、前記排気開口検知部、および前記吸気開口検知部からの情報に基づいて、前記オフ制御を行うことを特徴とする請求項5に記載の負荷試験装置。 - 前記排気蓋は、アクチュエータの駆動により開動作が行われ、
前記負荷試験装置のメイン電源がオン状態にされてから、前記アクチュエータによって前記排気蓋が開くのに必要な時間が経過した後で、前記オフ制御が開始されることを特徴とする請求項5に記載の負荷試験装置。 - 複数の抵抗器を有する抵抗器群を1以上含み、負荷試験用に試験対象電源と接続される抵抗部と、
前記抵抗部の抵抗器を冷却する冷却ファンと、
制御部とを備え、
前記抵抗部の下流の排気口には、使用時に開く排気蓋が設けられ、
前記排気口若しくは前記排気蓋には、前記排気蓋の開閉状態を検知する排気開口検知部が設けられ、
前記制御部は、前記抵抗器、若しくは前記抵抗器群、若しくは前記抵抗部に流れる電流若しくは印加された電圧に関する情報と、前記抵抗部の下流における排気温度に関する情報と、前記冷却ファンの回転状態に関する情報の少なくとも一つと、前記排気開口検知部からの情報に基づいて、前記試験対象電源から前記抵抗部への電力供給を停止するオフ制御を行うことを特徴とする負荷試験装置。 - 前記冷却ファンを駆動する電力を供給する駆動用電源から電源線に流れる電流若しくは、前記電源線を介して前記駆動用電源から前記負荷試験装置に印加された電圧に関する情報に基づいて、前記オフ制御を行う保護継電器を更に備えることを特徴とする請求項8に記載の負荷試験装置。
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RU2015131845/28A RU2577081C1 (ru) | 2013-11-20 | 2014-11-07 | Испытательное нагрузочное устройство |
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CA2888376A CA2888376C (en) | 2013-11-20 | 2014-11-07 | Load testing apparatus |
JP2015510539A JP5758059B1 (ja) | 2013-11-20 | 2014-11-07 | 負荷試験装置 |
TW103139962A TWI516783B (zh) | 2013-11-20 | 2014-11-18 | 負載測試裝置 |
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JP2019124557A (ja) * | 2018-01-16 | 2019-07-25 | 株式会社辰巳菱機 | 負荷試験装置 |
JP7109859B2 (ja) | 2018-01-16 | 2022-08-01 | 株式会社辰巳菱機 | 負荷試験装置 |
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US20150198636A1 (en) | 2015-07-16 |
RU2577081C1 (ru) | 2016-03-10 |
JP5551324B1 (ja) | 2014-07-16 |
SG11201503241VA (en) | 2015-06-29 |
CA2888376C (en) | 2016-06-28 |
TWI516783B (zh) | 2016-01-11 |
KR101550657B1 (ko) | 2015-09-08 |
CN104937430A (zh) | 2015-09-23 |
EP2913686A4 (en) | 2016-08-03 |
JPWO2015075761A1 (ja) | 2017-03-16 |
EP2913686B1 (en) | 2017-02-01 |
CN104937430B (zh) | 2016-08-31 |
MY171669A (en) | 2019-10-22 |
TW201531724A (zh) | 2015-08-16 |
EP2913686A1 (en) | 2015-09-02 |
CA2888376A1 (en) | 2015-06-26 |
US9389250B2 (en) | 2016-07-12 |
WO2015075761A1 (ja) | 2015-05-28 |
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