JPH05344640A - Protective relay, tester and testing system therefor - Google Patents

Abstract

PURPOSE:To make it possible for a tester to test a protective relay efficiently with no reference to a manual or the like. CONSTITUTION:Prescribed values of operating time, operating value, and the like are stored in the memory section 12 of a protective relay 1 or test procedures such as test items, test conditions, and the like are stored in one of the protective relay 1 or a tester 2, which then performs test based on the prescribed values or according to the test procedures thus stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective relay, a tester, and a test system including the same for testing the operating time and operating current of a protective relay.

[0002]

2. Description of the Related Art A test of a protective relay is performed by applying a quantity of electricity such as a voltage or current for the test from the tester to an input terminal of the protective relay and taking in a contact output of the protective relay from a detection terminal. Operating time, operating current value,
The protection relay is evaluated as to whether it is normal or not.

[0003]

DISCLOSURE OF THE INVENTION In this test,
The measured operating time and operating current value will be compared with the standard value for evaluation, but this standard value includes JIS standards and standards for each manufacturer. It was annoying.
In addition, the test procedure, for example, first test condition 3.0A.
It is troublesome for the tester to proceed with a test procedure such as a series of test items and test conditions, such as performing an operation value test in accordance with the test condition and then performing an operation value test in the test condition of 3.5 A while referring to the manual. It was a thing.

The present invention has been made in view of the above points, and an object thereof is to enable a tester to efficiently perform a test without referring to a manual or the like.

[0005]

In order to achieve the above object, the present invention is configured as follows.

That is, according to the present invention, the operating time and the standard value of the operating value are stored in the protective relay, or the test procedure is stored in either the protective relay or the tester. The test is conducted according to the test procedure.

[0007]

According to the above construction, since the standard value and the test procedure are stored in the protective relay or the tester, the tester
It is possible to proceed with the test without referring to the standard value or test procedure in a manual.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

The test system for the protective relay of this embodiment comprises a protective relay 1 and a tester 2.
As shown in FIG. 2, the tester 2 is arranged in front of the power receiving and transforming board 3 on which the protective relay 1 is installed, and the tester 2 is connected to the protective relay 1. In this embodiment, the lines for communication between the tester 2 and the protective relay 1 and for the output from which the output from the protective relay 1 is given to the tester 2 are the cables 5
The line for input which is connected with the tester 1 and supplies the test relay 1 with the amount of electricity for testing is connected with the cable 6.

The protective relay 1 is a transmission / reception unit 8 for transmitting / receiving information between the test unit 2 and an input unit 7 to which an electric quantity for testing from the test unit 2, that is, an AC signal is input in this embodiment.
An output unit 9 that operates according to an input, a CPU 10 that controls each unit, a settling unit 11 that sets a settling value, and a storage unit 12 that stores the operating time and the standard value of the operating value. ing.

The tester 2 has a control unit 13 for controlling each unit.
And an AC signal generator 14 that generates a test AC signal to be supplied to the protective relay 1, a transmitter / receiver 15 that transmits and receives information to and from the protective relay 1, and an operating time based on the output of the protective relay 1. And a measurement unit 16 that measures an operation value,
The storage unit 17 stores the test procedure.

In this embodiment, in order to know the standard value and the test procedure at the time of the test, it is not necessary to proceed with the test while referring to a manual or the like. ing.

That is, in this embodiment, the protective relay 1
The storage unit 12 stores the standard values of the operating time and the operating value, the tester 2 receives these standard values from the protective relay 1 by communication, and the storage unit 17 stores the test conditions and the test procedure. A signal is stored in the control unit 13, and a signal is sent to the control unit 13 to proceed with the test and evaluate the measured operation time and operation value.

As shown in FIG. 3, the storage unit 17 of the tester 2 stores the test procedure, for example, the test condition 3.0 first.
Perform the operating value test (time limit) in A, and then test conditions 3.
A test procedure including a series of test items and test conditions such as performing an operation value test (time limit) at 5 A is stored. As shown in FIGS. 4 (A) to 4 (C), the storage unit 12 of the protective relay 1 has standard values (10) for the lower limit and the upper limit of the timed current.
%), The standard values of the lower and upper limits of the instantaneous current (20%), the standard values of the timed operation time (300%, 700%), and the like are stored. As shown in FIG. 3 and FIG. 4, each test and each standard value has a command when transmitting from the protective relay 1 to the tester 2, for example, an operating value test (time limit) is IG, and a time limit current of ITL or the like is assigned to the lower limit standard value, and the standard value or the like is transmitted following this command.

In this embodiment, for example, the tests are sequentially carried out as shown in FIG. That is, the tester 2
Requests the protective relay 1 to send the data of the first settling value and standard value to be performed, and the protective relay 1
In response to this, the data such as the set value and the standard value is read from the storage unit 12 and transmitted to the tester 2. The tester 2 prepares for the test according to this test condition, reads the test procedure and the test condition from the storage unit 17, and starts the test.

For example, in the case of the operating time test (time limit), the test is performed as shown in the flowchart of FIG.

That is, the tester 2 reads the settling value, for example, 10 seconds, 5 A read from the storage section 12 of the protective relay 1 and transmitted (step 1), and further,
The standard value read from the storage unit 12 of the protective relay 1 and transmitted, for example, ± 10% is read (step 2). Next, the test current value, for example, 15A, which is 300% of 5A, is calculated (step 3), and the judgment value, for example, 9 to 11 seconds is calculated from the standard value and the settling value (step 4), and the test is performed. A current is passed (step 5) and a timer is started (step 6). And the protective relay 1
It is judged whether or not there is an output from (step 7), and when it is judged that there is an output, the timer is stopped (step 8), and it is judged whether or not the measured time is within the judgment value 9 to 11 seconds. The pass and fail are evaluated (step 9).

In this way, the operation time test is completed.

Referring again to FIG. 5, when the protective relay 1 operates and the test is completed, the tester 2 transmits the data such as the following set values and standard values to the protective relay 1. Request, the protective relay responds to this by the storage unit 1
The following setting values and standard values are read from 2 and transmitted to the tester 2. The tester 2 prepares for the next test according to this test condition, reads the test procedure and the test condition from the storage unit 17, and starts the test.

Thereafter, the tests are sequentially carried out in the same manner.

As described above, since the set values and the standard values stored in advance in the protective relay 1 are transmitted to the tester 2 to proceed with the test and evaluate each test, the tester is tested as in the conventional example. However, it becomes possible to proceed with the test efficiently without referring to the manual.

As another embodiment of the present invention, as shown in FIG. 7, the test procedure is stored in the protective relay 1 side,
The test procedure may be read first and the tester 2 may proceed with the test according to this test procedure.

[0024]

As described above, according to the present invention, the operating time and the standard value of the operating value are stored in the protective relay, or the test procedure is stored in either the tester or the protective relay. Since the test is performed according to the standard value or the test procedure, the tester can proceed with the test without referring to the standard value or the test procedure manually, and the test can be performed efficiently. It will be.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a connection state between a tester and a protective relay.

FIG. 3 is a diagram showing an example of a test procedure.

FIG. 4 is a diagram showing an example of standard values.

FIG. 5 is a diagram sequentially showing operations of the protective relay and the tester during the test.

FIG. 6 is a flowchart provided for explaining the operation.

FIG. 7 is a diagram sequentially showing the operations of the protective relay and the tester during the test of another embodiment of the present invention.

[Explanation of symbols]

 1 Protective relay 2 Tester 11 Settling unit 12 Storage unit 16 Measuring unit

Front page continuation (72) Inventor Toshimori Fujieda 918-1 Minamisayama, Nakagami, Ijuma City, Saitama Prefecture Musashi Electric Co., Ltd. (72) Osamu Fukui 918 Minamisayama, Nakagami, Iruma City, Saitama Prefecture -1 Inside Musashi Electric Instruments Co., Ltd.

Claims (6)

[Claims] 1. A test system for a protective relay, comprising: a protective relay; and a tester which is connected to the protective relay to supply a quantity of electricity for testing and to which an output of the protective relay is given. Has a storage unit that stores the operating time and the standard value of the operating value, the tester, the operating time and the operating value measured based on the output of the protective relay, the standard transmitted from the protective relay. A test system for protective relays characterized by being evaluated based on values. 2. A protective relay to which a tester for supplying a quantity of electricity for testing is connected, the protective relay having a storage section in which operating time and standard values of operating values are stored. 3. A tester which is connected to a protective relay to supply a quantity of electricity for testing and to which an output of the protective relay is given, the operating time and the operation being measured based on the output of the protective relay. A tester characterized by evaluating a value based on a standard value sent from a protective relay. 4. A protection relay test system comprising a protection relay and a tester connected to the protection relay to supply a quantity of electricity for testing and to which an output of the protection relay is provided, wherein One of the test devices has a storage unit in which a test procedure including a plurality of test items and test conditions corresponding to each test item is stored, and the test device performs a test of the protective relay according to the test procedure. A test system for protective relays, characterized in that 5. A protective relay, to which a tester for supplying a quantity of electricity for testing is connected, having a storage unit in which a test means including a plurality of test items and test conditions corresponding to each test item is stored. A protective relay characterized by the following. 6. A tester which is connected to a protective relay to supply a quantity of electricity for testing and to which an output of the protective relay is given, including a plurality of test items and test conditions corresponding to each test item. A tester having a storage unit in which a test procedure is stored.