JP2666425B2 - Trigger gap trigger device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear synthesis test device, and particularly to a trigger gap trigger device.

B. Summary of the Invention The present invention relates to an apparatus for triggering a trigger gap as a switch means of a synthetic test apparatus, wherein a trigger pulse of a high voltage and a large current is supplied by supplying a trigger pulse from a power supply capacitor through an auxiliary trigger gap and an impedance element. A pulse can be generated and a stable trigger can be performed.

C. Prior Art In order to verify the performance of a switch such as a circuit breaker or a grounding device, a synthesis test using a current source and a voltage source is often employed. In such a synthesis test device, a trigger gap is used as a switch means. In the trigger gap, withstand voltage characteristics are obtained by the distance between the electrodes (gap length) of the gap and the like, and discharge is obtained by applying a trigger voltage that promotes the start of discharge between the electrodes.

Conventionally, as shown in FIG. 2, a trigger gap trigger device has a high-voltage winding between a perforated main electrode 2 and a trigger pin 3 with respect to a trigger gap including a main electrode 1, a perforated main electrode 2 and a trigger pin 3. Is connected to the primary side of the pulse transformer 4 to which a pulse voltage is applied.

D. Problems to be Solved by the Invention Conventionally, when used in a synthetic test apparatus, a trigger gap has been required to withstand a high voltage and to have a severe operation duty of being able to trigger under a low voltage applied state. From this,
In the trigger device, the energy of the trigger pulse is sufficiently large and the voltage value is large enough to induce a stable discharge between the electrodes 1 and 2 by causing a discharge between the electrodes 2 and 3 when the voltage between the main electrodes 1 and 2 is low. A sufficiently high one is required.

Under such severe conditions, a high voltage and a large current can be applied to the pulse transformer 4, a relatively large capacity for the pulse power source is required, and a small power source having little energy and voltage is required. Then, it was easy to cause a trigger time delay and a variation in the trigger time.

An object of the present invention is to provide a trigger device that can generate a high-voltage, large-current trigger pulse and can perform a stable trigger.

E. Means and Action for Solving the Problems In order to achieve the above object, the present invention, in a trigger gap as a switch means of a switch synthesis test apparatus, is precharged between a perforated main electrode and a trigger pin of the trigger gap. A series connection circuit of a power supply capacitor, an auxiliary trigger gap, and a trigger current / time constant setting impedance element, a trigger voltage setting impedance element is provided between the perforated main electrode and a trigger pin, and the auxiliary trigger gap is triggered. And a trigger pulse amplifying and stabilizing circuit for the main trigger gap is constituted by the auxiliary trigger gap, the power supply capacitor and the impedance element.

F. Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, a power supply capacitor 5 is charged to a predetermined voltage by a charger 6, and one end is connected to the trigger pin 3 of the main trigger gap and the other end is connected to the trigger pin of the auxiliary trigger gap 7. The main electrode of the auxiliary trigger gap 7 is connected via an impedance element 8 to the perforated main electrode 2 of the main trigger gap. Further, an impedance element 9 is provided between the perforated main electrode 2 and the trigger pin 3.

In the auxiliary trigger gap 7, a trigger pulse is applied from the trigger circuit 10 between the perforated main electrode and the trigger pin. The trigger circuit 10 includes, for example, a conventional pulse transformer and a pulse power supply, and its trigger pulse output is configured to have a voltage and a current value necessary for triggering the auxiliary trigger gap 7.

In such a configuration, the main trigger gap (1 to
In the trigger of 3), the auxiliary trigger gap 7 is discharged by a trigger pulse from the trigger circuit 10, and this discharge causes a discharge current to flow from the capacitor 5 through the path of the trigger pin 3, the impedance element 9, the impedance element 8, and the auxiliary trigger gap 7. . At this time, the impedance element 9
The applied voltage between the trigger pin 3 and the perforated main electrode 2 is determined by the impedance, and the trigger pulse in which the time constant (rising of the trigger current) between the trigger current and the capacitor 5 is determined by the impedance of the impedance element 8 is supplied.

Therefore, the auxiliary trigger gap 7 is used as auxiliary switch means for obtaining the trigger pulse of the main trigger gap, and the trigger pulse is supplied by the trigger of the auxiliary trigger gap 7. At this time, the voltage of the trigger pulse is stabilized by the charging voltage of the capacitor 5 and the impedance elements 8 and 9 without causing a time delay or variation in the trigger of the main trigger gap, and a sufficient peak value can be obtained. Is stable and a sufficient value can be obtained by the impedance element 8. Also,
The trigger circuit 10 is only required to be capable of stably and reliably triggering the auxiliary trigger gap 7. The trigger circuit 10 has a small capacity and a small configuration for generating a trigger pulse of relatively low energy and voltage. Trigger can be obtained.

G. Effects of the Invention As described above, according to the present invention, the trigger pulse is amplified and stabilized by the auxiliary trigger gap, the power supply capacitor, and the impedance element. There is an effect that sufficient voltage and energy can be provided for a trigger with a stable trigger gap.

[Brief description of the drawings]

FIG. 1 is a trigger circuit diagram showing an embodiment of the present invention, and FIG. 2 is a conventional trigger circuit diagram. 1 ... main electrode, 2 ... perforated main electrode, 3 ... trigger pin,
5 ... power supply capacitor, 6 ... charger, 7 ... auxiliary trigger gap, 8, 9 ... impedance element, 10 ... trigger circuit.

Claims (1)

(57) [Claims] In a trigger gap as a switch means of a switch synthesizing test apparatus, a power supply capacitor precharged between a perforated main electrode of the trigger gap and a trigger pin, an auxiliary trigger gap, and an impedance for setting a trigger current and a time constant. A trigger gap trigger device, comprising: a series connection circuit of elements; a trigger voltage setting impedance element between the perforated main electrode and a trigger pin; and a trigger circuit for triggering the auxiliary trigger gap. .