摘要:
Rectangular bus bars (3, 5, 7) alternatively engaged in either of a pair of crossed slots (33, 35) in a support block (23) secured in a panel board (11) are locked in place by a locking device (43) incorporated in a cylindrical terminal portion (15) of each bus bar (3, 5, 7). The locking device (43) includes an expandable ring (45) seated in a circumferential groove (47) in the cylindrical terminal portion (15). A pair of actuating pins (57, 59) are urged radially outward in diametrically opposed bores (53, 55) to wedge the expandable ring (45) against the support block (23), by a tapered screw (61) threaded into a central longitudinal bore (51) in the terminal portion (15) of the bus bar (3, 5, 7).
摘要:
An auxiliary switch tray is provided for an electrical switching apparatus, such as a circuit breaker. The circuit breaker includes a housing, an actuating mechanism, and a plurality of auxiliary switches. The housing has a mounting mechanism. The auxiliary switch tray includes a module having first and second sides, and a plurality of mounts disposed on the first side. At least a plurality of the mounts is structured to receive a corresponding one of the auxiliary switches. A base is disposed on the second side of the module and is coupled to the mounting mechanism in order to install the auxiliary switches in a predetermined position with respect to the actuating mechanism of the circuit breaker. The module, the mounts, and the base comprise one single-piece molded member. At least a plurality of the mounts are molded compartments of the single-piece molded member.
摘要:
An auxiliary switch tray is provided for an electrical switching apparatus, such as a circuit breaker. The circuit breaker includes a housing, an actuating mechanism, and a plurality of auxiliary switches. The housing has a mounting mechanism. The auxiliary switch tray includes a module having first and second sides, and a plurality of mounts disposed on the first side. At least a plurality of the mounts is structured to receive a corresponding one of the auxiliary switches. A base is disposed on the second side of the module and is coupled to the mounting mechanism in order to install the auxiliary switches in a predetermined position with respect to the actuating mechanism of the circuit breaker. The module, the mounts, and the base comprise one single-piece molded member. At least a plurality of the mounts are molded compartments of the single-piece molded member.
摘要:
The contact fingers (49) of electrical switching apparatus (1) have radial convex surfaces (107) centered on the pivot pins (51) which seat on concave surfaces (109) in the molded contact carrier (47) to transmit bending loads on the pin (51) into the carrier (47). A seal member (93) which snaps onto the end of the pivot pin (51) has fins (99) which extend between the contact fingers (49) to block flow of arcing gases through the carrier (47). For lower current ratings, some of the contact fingers (49) are replaced by annular spacers (119) which also transmit bending moments into the carrier (47) and restrict gas flow. A stop ledge (77) on the carrier (47) against which the contact springs (79) bias the contact fingers (49) has a recess (83) which allows the center fingers (49c) to project farther toward the stationary contacts (39, 57) so that the arc toes (55) on these fingers (49c) are the last to separate on opening and the arc is concentrated on them. The drive pin (129) connecting the carrier (47) to the operating mechanism has flats (137) which key it for engagement in a slot (135) in the carrier (47) for installation and removal only with the carrier pivots (73) lifted out of their bearing pockets (113) by removal of the rear casing (7).
摘要:
An integral stationary arcing contact (61) and arc runner (75) for electrical switching apparatus (1) is formed by an electrically conductive member (65) secured to the line conductor (13) adjacent the stationary main contact (19) thereby providing a joint free path for the arc to pass from the arcing contact (61) to the arc runner (75). Preferably, the electrically conductive member (65) is a sheet metal member having a base section (67) secured to the line conductor (13), an arcing contact section (73) adjacent the stationary main contact (19) and extending generally perpendicular to the line conductor (13) and a runner section (75) extending at an obtuse angle (α) to the arcing contact section (71) toward the arc chute (83). A support member (81) between the arcing contact section (71) and the housing (3) transmits reaction forces imposed by the moving conductor assembly (23) on the sheet metal member (65) into the housing (3).
摘要:
The contact fingers (49) of electrical switching apparatus (1) have radial convex surfaces (107) centered on the pivot pins (51) which seat on concave surfaces (109) in the molded contact carrier (47) to transmit bending loads on the pin (51) into the carrier (47). A seal member (93) which snaps onto the end of the pivot pin (51) has fins (99) which extend between the contact fingers (49) to block flow of arcing gases through the carrier (47). For lower current ratings, some of the contact fingers (49) are replaced by annular spacers (119) which also transmit bending moments into the carrier (47) and restrict gas flow. A stop ledge (77) on the carrier (47) against which the contact springs (79) bias the contact fingers (49) has a recess (83) which allows the center fingers (49c) to project farther toward the stationary contacts (39, 57) so that the arc toes (55) on these fingers (49c) are the last to separate on opening and the arc is concentrated on them. The drive pin (129) connecting the carrier (47) to the operating mechanism has flats (137) which key it for engagement in a slot (135) in the carrier (47) for installation and removal only with the carrier pivots (73) lifted out of their bearing pockets (113) by removal of the rear casing (7).
摘要:
An integral stationary arcing contact (61) and arc runner (75) for electrical switching apparatus (1) is formed by an electrically conductive member (65) secured to the line conductor (13) adjacent the stationary main contact (19) thereby providing a joint free path for the arc to pass from the arcing contact (61) to the arc runner (75). Preferably, the electrically conductive member (65) is a sheet metal member having a base section (67) secured to the line conductor (13), an arcing contact section (73) adjacent the stationary main contact (19) and extending generally perpendicular to the line conductor (13) and a runner section (75) extending at an obtuse angle (α) to the arcing contact section (71) toward the arc chute (83). A support member (81) between the arcing contact section (71) and the housing (3) transmits reaction forces imposed by the moving conductor assembly (23) on the sheet metal member (65) into the housing (3).