JPH08516U - Test input device for protective relay panel - Google Patents

Abstract

(57) [Summary] [Purpose] When the connector of the test input device is connected to or disconnected from the relay element in order to perform a forced operation test of the protective relay elements collectively arranged in the protection relay panel, the original power source of the protection relay panel is removed. Make it possible to do without turning on and off. [Structure] A power supply circuit of the test input device is provided with an auxiliary relay contact, and this auxiliary relay is operated by a push button switch and self-held, or a self-holding release push button switch is operated to release self-holding. The power supply for forced operation test can be closed or opened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a test input device for forcibly operating each relay element of a protective relay board to perform a sequence operation test of wiring in the board.

[0002]

[Prior art]

 In protective relay boards installed in substations, etc., a large number of protective relay elements are collectively arranged in the board, and the density is increasing, but there is a strong demand for a reduction in the installation area as the land price rises. , The miniaturization is progressing more and more recently.

For this reason, even in the protective relay panel, the test input circuit for the forced operation test, which was provided along with the input circuit for each relay element in order to confirm the sequence operation in the panel, is protected from the main body of the protective relay panel. Removed, externally attached only when necessary such as at the time of product shipment, installation completion, repair inspection, etc., to give input for forced operation to each relay element, confirm operation / non-operation and sequence operation status, A method of removing the test input device for such forced operation during operation is used.

FIG. 2 shows an example of a conventionally used external test input device 20 for forced operation test (hereinafter, simply referred to as test input device). Reference numeral 1 denotes a panel surface of a relay panel 30. 2 to 4 are power terminals of the connector 1, which are respectively connected to power terminals 32 to 34 of the connector 31 on the relay board side, P is a positive voltage terminal, N is a negative voltage terminal, and C is a zero potential terminal. It shows that it is a common terminal. 5 to 9 are input terminals for test input for forced operation to each relay element that is housed together on the relay board side, and 11 to 15 are for determining whether or not to supply the test input to the input circuit of each relay element. An input setting toggle switch for setting, 16 is a rotary switch for selecting the polarity of the set voltage that becomes the forced operation test input signal. Fig. 3 shows such an external test input device 20 as a protective relay panel. It shows the situation where it is mounted on the panel surface of 30 with connectors 1 and 31 for connection, and when all the relay elements are stored in the protective relay board 30 during the completion test of the factory, the inside of the board in the completed state. This is a simple device for performing sequence tests, sequence test tests after local delivery, relay tests after inspection and repair, and sequence tests in the panel.

[0005]

[Problems to be solved by the device]

 When using the test input device, first open all input setting switches on the panel surface of the test input device to set whether to supply the test input to the forced operation test input circuit of the relay element. Set to. The standard procedure is to set again "open" or "closed" according to the function of each element, attach it to the protective relay panel with a connector, and then turn on the original power of the protective relay panel. .

However, in actual use, it takes a lot of time and effort to open and close the power supply of the protective relay panel each time the connector for connection of the test input device is attached / detached, and the power supply of the relay panel is inadvertently mistaken. If the detachable connector of the test input device is attached or detached while it is still inserted, there is a problem that the relay element is operated unnecessarily and the sequence test is confused.

[0007]

[Means for Solving the Problems]

 The power supply circuit of the test input device has a contact for the auxiliary relay, and this contact can be held or released by self-holding so that the power supply for the forced operation test can be opened and closed.

[0008]

[Work]

 Since an auxiliary relay contact for opening and closing is provided in the power circuit of the test input device and the power of the test input device can be opened and closed by a push-button switch, the forced operation test input for each relay element is set before the power is turned on. In addition, if the test input device is inadvertently removed from the protective relay panel without turning off the power to the protective relay panel, the self-maintenance of the auxiliary relay is released and the power of the test input device is surely opened. It returns to the state of ".

In this state, even if the connecting connector is attached or detached, the auxiliary relay X wave difference does not occur, so that power is not supplied to the forced operation test input circuit at the same time as the attaching and detaching.

[0010]

【Example】

 FIG. 1 is a circuit diagram of a main part of a test input device according to the present invention. Although detailed description will be given below with reference to the drawings, the same portions as those described in FIG. 3 are denoted by the same reference numerals to avoid duplication.

In the figure, reference numeral 21 denotes a drive coil of an auxiliary relay, which receives power from a power supply terminal 3 and a power supply terminal 4 of a connector. 22 is a push button switch A having an a contact, 23 is a push button switch B having a b contact, and 24 to 27 are auxiliary relays X21, each of which is an a contact, and the contact point 27 therein is the self-holding of the auxiliary relay X21. Is used for

[0012] The test input device having the above-mentioned configuration prevents the power from reaching the forced operation test input circuit of each relay element unless the push button switch A is pressed, so that the positive, negative and common terminals are all connected. Since the a contact is provided at the front of the protective relay panel, the test input device can be attached or detached even when the main power is on to the protective relay panel. When the toggle switch for input setting is visually checked, the push button switch A By pressing, it is possible to supply the forced operation test input to each relay element. When push button switch A is pressed once, self-holding is applied by contact 27 of auxiliary relay X, and forced operation test input is input to each relay element of the protective relay panel until push button switch B is pressed to release self-holding. To be done. At this time, even if the connecting connector of the test input device is accidentally pulled out from the protective relay panel without pressing push button switch B, the self-holding of auxiliary relay X21 is released and the contact returns to the initial state. When the test input device is attached to the protective relay panel, the test can be performed regardless of the "on" or "off" status of the original power source of the protective relay panel.

[0013]

[Effect]

 Since the auxiliary relay contacts that simultaneously open and close all three terminals of positive, negative, and common that compose the power supply circuit of the test input device are arranged and self-held, the main power of the protective relay panel is switched on and off. The test input device can be installed and removed at any time regardless of the "OFF" state, and the forced operation test input of the relay element can be set, confirmed, and executed.Also, when the test input device is removed from the protective relay panel, the auxiliary relay must be used. Even if X and its contacts return to the initial state and are mounted again in this state, the auxiliary relay X will not operate as it is, so it is efficient without being caught in the operating procedure when attaching or detaching the test input device. It has the effect of enabling a relay test.

[Submission date] December 9, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

In this state, even if the connecting connector is attached / detached, the auxiliary relay X does not operate, so that power is not supplied to the forced operation test input circuit at the same time as attachment / detachment.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a main part of a test input device according to the present invention.

FIG. 2 is a circuit configuration diagram of a main part of a conventional test input device.

FIG. 3 is an explanatory diagram showing a situation in which a test input device is used by being mounted on a protective relay panel.

[Explanation of symbols]

1, 31 ... · connector, 2-4, 32-34
··· Power supply terminals 5 to 9, 35 to 39 ··· Test input terminals for forced operation 11 to 15 ··· Input setting switch 16 ··· Rotary switch 20 ··· Forced operation test input Device, 21 ...
・ Auxiliary relay X22,23 ... ・ Pushbutton switch 24,2
5, 26... Contact of auxiliary relay X 27... Self-holding contact of auxiliary relay X 30... Protective relay panel

Claims (1)

[Scope of utility model registration request] 1. A test input device provided with a circuit for externally providing an input for a forced operation test to a group of relay elements, such as a protective relay panel, comprising: A test input device for a protective relay panel, comprising a dedicated push button switch, and a contact circuit self-held by an auxiliary relay is arranged in all power supply circuits from each power supply terminal.