JPH02137740U

JPH02137740U -

Info

Publication number: JPH02137740U
Application number: JP4659389U
Authority: JP
Priority date: 1989-04-20
Filing date: 1989-04-20
Publication date: 1990-11-16

Description

[Brief explanation of the drawing]

第１図Ａは釈放電磁石のプランジヤが吸着され
た状態でのこの考案の実施例における釈放機構の
側面図、第１図Ｂは同じくプランジヤが突出した
状態での側面図、第２図は第１図の釈放機構を備
えた回路遮断器の要部縦断面図、第３図は第２図
から釈放機構を取り除いた回路遮断器の要部縦断
面図、第４図は第３図の回路遮断器がトリツプし
た瞬間を示す要部縦断面図、第５図は第３図の
−線に沿う要部正面図、第６図は従来装置を示
す要部側面図である。１……導体、２……変流器、４……釈放電磁石
、６……プランジヤ、１４……釈放機構、４３…
…ラツチレバー、４７……ラツチレバーの復帰ば
ね、４８……釈放板、５１……釈放板の係止部、
５２……引外しばね。 FIG. 1A is a side view of the release mechanism in the embodiment of this invention with the plunger of the release electromagnet being attracted, FIG. 1B is a side view of the release mechanism with the plunger protruding, and FIG. Fig. 3 is a vertical cross-sectional view of the main part of the circuit breaker with the release mechanism shown in Fig. 2, Fig. 4 is a longitudinal cross-sectional view of the main part of the circuit breaker with the release mechanism removed from Fig. 2, and Fig. 4 is the circuit breaker of Fig. 3. FIG. 5 is a longitudinal sectional view of the main part showing the moment when the device trips, FIG. 5 is a front view of the main part taken along the - line in FIG. 3, and FIG. 6 is a side view of the main part showing the conventional device. DESCRIPTION OF SYMBOLS 1... Conductor, 2... Current transformer, 4... Release electromagnet, 6... Plunger, 14... Release mechanism, 43...
...Latch lever, 47...Latch lever return spring, 48...Release plate, 51...Release plate locking part,
52...Tripping spring.

Claims

[Scope of utility model registration request]

In a circuit breaker tripping device equipped with a release electromagnet that detects the current flowing in the conductor of the circuit breaker via a current transformer and projects a plunger when the current exceeds a certain value, the device is fixed in position by a return spring. When the plunger of the held release electromagnet projects, the latch lever rotates from the fixed position in response to the projecting force, and the latch lever and the locking portion engage with each other under the spring force of the stored trip spring. The circuit breaker is characterized by a release mechanism having a release plate that is disengaged when the latch lever rotates from the home position and is projected by the spring force of the tripping spring to disengage the tripping mechanism of the circuit breaker. tripping device for circuit breakers.