CN1021168C - Oprating mechanism of an auxiliary trip unit for modular circuit breaker - Google Patents

Oprating mechanism of an auxiliary trip unit for modular circuit breaker Download PDF

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Publication number
CN1021168C
CN1021168C CN89101031A CN89101031A CN1021168C CN 1021168 C CN1021168 C CN 1021168C CN 89101031 A CN89101031 A CN 89101031A CN 89101031 A CN89101031 A CN 89101031A CN 1021168 C CN1021168 C CN 1021168C
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CN
China
Prior art keywords
lever
tripping
relay
plate
involution
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Expired - Lifetime
Application number
CN89101031A
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Chinese (zh)
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CN1036862A (en
Inventor
德·罗伯特斯·帕特克
古伊隆·帕特克
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Schneider Electric SE
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Merlin Gerin SA
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Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1072—Release mechanisms which are reset by opening movement of contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages

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  • Breakers (AREA)

Abstract

An auxiliary tripping block for a modular circuit-breaker comprises a tripping relay and a plate, with catch , associated with an energy-storing spring. The plate carries a lug for transmitting the tripping order to the switching mechanism of the circuit-breaker, and an articulation spindle for a tripping lever, this comprising a first arm interacting with the catch , and a second arm separated from the relay by a resetting lever mounted in free rotation on a spindle. The relay serves to unlock the catch so as to release the plate which, under the relaxation of the spring , transmits the tripping force to the circuit-breaker and ensures the automatic resetting of the relay by way of the resetting lever. The relay of the actuating mechanism of the auxiliary block requires a reduced tripping force. Applications: differential trip, with transmission MX and under-voltage MN.

Description

Oprating mechanism of an auxiliary trip unit for modular circuit breaker
The present invention relates to a kind of auxiliary trip unit with the mold insulation shell, it can be connected with a multipole circuit breaker in the side and be coupled.Multipole circuit breaker comprises a pair of separable contact and a switching mechanism of getting in touch with heat, magnetic master tripgear at least.The shell of auxiliary unit holds an operating mechanism, and it comprises:
Tripping lever by tripping relay control with an actuating coil and tripping operation cap;
One is sent to trip signal on the machine driving bar of the switching mechanism of breaker unit by the relay cap, to cooperate with above-mentioned relay coil, makes circuit breaker trip;
A hook that is installed between a handle and the plate, this plate pivotally are installed on first stationary spindle between carrying position and the unloading position;
An energy-stored spring, it shifts plate onto unloading position when tripping lever separates hook;
And the automatic involution lever in the centre of a relay since the action of plate it move to unloading position, this lever is spliced on second stationary spindle of shell.
Known by No. the 3114717th, Deutsche Bundespatent, this pattern device is applied in a kind of low pressure releasing device of standard type circuit breaker.The involution of relay is by firm and hard existing, and this plate acts on the involution lever, and this involution lever is the same with tripping lever to be pivotally mounted on the same axle.By the supporting base that is fixed on the tripping lever underarm, realize the coupling of mechanical trip connecting rod and breaker unit.The plate of auxiliary unit also makes the switching mechanism tripping operation of breaker unit, but this tripping operation has been unclamped after certain time-delay is just moved at hook.
The objective of the invention is to shorten the trip time of the breaker unit mechanism that gets in touch with the relay of an auxiliary unit.
Auxiliary trip unit is characterised in that: plate is supporting short column and tripping lever the 3rd hinge axle of a mechanical trip connecting rod; This tripping lever comprises that a first arm that matches with hook makes it second arm that separates with relay tripping operation cap with one by being installed in the involution lever that freely rotates on second axle.
The function of relay only is hook is unclamped, and then plate is discharged.Along with the mechanical energy that the extension of energy-stored spring obtains, can be used for transmitting tripping force and two purposes of release relay of breaker unit.
Relay is after the involution, and when handle was driven to make position and hook and makes spring remain on the carrying position, mechanical energy was stored in the energy-stored spring of plate once more.
The involution lever is equipped with a damping spring, and when plate moved to unloading position, a protuberance of plate at first acted on the damping spring.This spring is set, is applied to involution power on the relay cap with adjustment.It is favourable that this damping spring is processed into cylindricality, be installed on second axle of shell at the involution lever before, it is installed on the involution lever in advance.Location (polarization) spring and involution lever are got in touch, and when plate was in the carrying position, this spring was pressed on the tripping lever involution lever.When adjusting relay, the tripping operation cap separates a predetermined interval with the involution lever.
From the following explanation to one embodiment of the present of invention, its additional advantage and feature will be clearer, and this embodiment is only as a kind of non-limiting example, and represent in the following drawings, in the accompanying drawing:
Fig. 1 is the operating mechanism front view of an auxiliary trip unit, circuit breaker is shown is in the close position;
Fig. 2 is the view identical with Fig. 1 with Fig. 3, represents the circuit breaker trip process respectively, and the position behind the circuit breaker trip.
Referring to figs. 1 to 3, the auxiliary trip unit 10 with mold insulation shell 12 can be connected with a multipole circuit breaker unit (not shown) that disposes in pairs in the side and be coupled.
Each utmost point of breaker unit all is provided with a switching mechanism, and for example french patent application the 2nd, 616, the pattern of narration in No. 583.Switching mechanism and a pivotally supported manual operation handle are got in touch, and be used for heat, magnetic master tripgear that monitoring stream crosses electrode current intensity with a design and get in touch, a pair of separable contact moves together with switching mechanism, so that the electric loop that is provided with between two splicing ears of this utmost point opens circuit or closure.
Auxiliary trip unit 10 accommodates an operating mechanism 14 and the breaking coil relay 18 by 16 controls of involution handle.Mechanism 14 from relay 18, is sent to breaker unit through a mechanical trip connecting rod 19 with trip signal.Constitute this contact by a short column 20, move with trip(ping) bar (not shown) together with the breaker unit switching mechanism by shell 12 openings 22.
Auxiliary unit 10 can or constitute differential trip unit, or constitutes undervoltage tripping device MN, or constitutes shunt trip MX.Operating mechanism 14 is standardized, and relay 18 is applicable to the tripgear of various types.
For differential trip unit, relay 18 and a differential sensor are electrically connected, and this detector has a totalizing current transformer, and measurable flow is crossed the summation of the electric current of each active input conductor of breaker unit.When insulation was broken down, differential sensor made the coil stimulating of relay 18, and relay causes operating mechanism 14 tripping operations, and made the breaker unit cascade tripping by mechanical linkage 19.
For low-voltage tripping device MN, when monitored power-supply system loss of voltage or when reaching a value that is lower than the pre-tuning starting value, relay 18 actions.This just causes breaker unit with the automatic trip of low-voltage mode.
For shunt trip MX,, make relay 18 excitations from the outside by means of distant place control circuit by a button or controller control.This forces tripping operation with regard to a distant place that causes breaker unit.
The operating mechanism 14 of auxiliary trip unit 10 comprises a plate 24, and this plate pivotally is installed on first stationary spindle 26 that carries between position (Fig. 1) and the unloading position (Fig. 3).Plate 24 is supporting the short column 20 and the 3rd axle 28 of mechanical trip connecting rod 19.On the 3rd axle, be provided with a tripping lever 30, its top the first arm matches with a hook lever 31 at locked position of coupler, forms hook 32.Hook lever 31 is that limited pivoted is installed on the axle 34 of plate 24, and links by a drive link 36 and handle 16.Involution handle 16 is installed in rotation on the fixing axle 38.Toggle pin joint 40 is eccentric with respect to the axle 38 of handle 16.
Tripping lever 30 is biased to locked position of coupler by an elastic tongue piece 42 that plays the resetting spring effect.Be provided with the middle involution lever 44 of a relay 18 between relay 18 and plate 24, an end of lever 44 is installed on second axle 46 free to rotate.Matching with the driving cap 50 of relay 18 in 48 left sides, opposite end, and matches with bottom second arm of tripping lever 30 in the right.Between the two ends of involution lever 44, be provided with a pillar 52.One column spring 54 is housed on the pillar 52, and when tripping operation took place in mechanism 14, a jut 56 of an end steel thigh 53 backup plates 24 of spring 54 moved, and the steel thigh 58 of the other end for good and all is pressed on the protuberance of end 48.
The energy-stored spring 60 of operating mechanism 14 is made of the torque spring on the coaxial axle 26 that is installed in plate 24.This spring 60 is pressed on the protrusion 62 of insulation crust 12, and after the cap 50 by tripping relay 18 causes hook to disconnect, impels plate 24 anti-clockwise movements to unloading position (Fig. 3).(see figure 3) when handle 16 reaches the open position of circuit breaker, block 64 make plate 24 stop motions.
The top margin of plate 24 is equipped with an indicator mark 66, and it can be towards a display aperture 68 location of the front panel that is located at shell 12.To indicate because the circuit breaker trip that the action of the mechanism 14 of auxiliary unit 10 causes.This indicator mark 66 has a color region, by hole 68 obviously as seen.
Operating mechanism 14 actions of auxiliary trip unit 10 are as follows:
Circuit breaker is in make position
In the carrying position, as shown in Figure 1, handle 16 is in stable right positions in auxiliary unit 10, and the little gap that is separated by, the end 48 of cap 50 and involution lever 44.Energy-stored spring 60 is stretched, and by tripping lever 30 hook 32 is pinned, thereby maintains the motion contact between plate 24 and the handle 16.
The tripping operation process of circuit breaker
Under the excitation situation of relay 18, tripping operation cap 50 is seen Fig. 2 by arrow F() direction is driven, and affact on the involution lever 44 of axle 46 inhour rotations, the motion of involution lever 44, drive tripping lever 30 from the locked position of coupler to the unloading position, throw off so that link up with 32, and the motion contact between handle 16 and the plate 24 is disconnected.Be subjected to the release action power of energy-stored spring 60, then plate 24 arrives position shown in Figure 3 round its axle 26 counter rotations, realized two distinct functions, that is: made first function of breaker unit arranged side by side tripping operation and make second function of relay 18 involutions.
First trip avoidance function realizes that by the post 20 of plate 24 it makes the arc opening 22 of mechanical linkage 19 along shell, moves to a high position (Fig. 3) from low level (Fig. 2), causes the tripping operation of breaker unit switching mechanism, and makes each utmost point contact automatic disconnection.
The second involution function of relay 18 realizes that by thrust 56 it contacts with the steel thigh 53 of spring 54, involution lever 44 in the middle of driving clockwise, and cap 50 inwardly promotes (see figure 3) tripping.When plate 24 contacts with block 64, relay 18 involutions, and handle 16 is in stable leftward position, and this position is corresponding to the open position of breaker unit.This position in Fig. 3, hook 32 is automatically blocked once more, has rebulid the motion contact between handle 16 and the plate 24.Damping spring 54 can flexibly be eliminated any excess of stroke of operating mechanism 14, and the involution power of restriction on relay 18 caps 50.As long as plate 24 is pressed on the block 64, energy-stored spring 60 keeps unloaded state.
The final involution of auxiliary unit
Auxiliary unit 10 final involutions are that wearing or featuring stage armour hand 16 forwards right positions (Fig. 1) clockwise to from leftward position (Fig. 3) and finishes.This motion of handle 16 makes plate 24 move to the carrying position from unloading position.In the motion process of plate 24, energy-stored spring 60 is stretched automatically, and the short column 20 of the connecting rod 19 that will trip is shifted the bottom standby position that can make breaker closing onto.
Swing handle 16 makes auxiliary unit 10 final involutions, can manually or automatically realize.In manual case, handle 16 is irrelevant with the switching mechanism of the breaker unit that links to each other.At automatic condition, handle 16 links to each other with switching mechanism by a mechanical involution connecting rod.
Can notice that involution lever 44 is provided with a retainer spring 70, when plate 24 was in the carrying position, this spring leaned against on bottom second arm of tripping lever 30 above-mentioned lever 44.When relay 18 carrying, the end 48 of cap 50 and the involution lever 44 constant minimum range (see figure 1) of being separated by.
When trip signal was sent to switching mechanism, this device can make the circuit breaker response time reduce.

Claims (9)

1, the auxiliary trip unit (10) of a band mold insulation shell (12), it can be connected with a multipole circuit breaker in the side and be coupled; Multipole circuit breaker comprises pair of separable contact and a switching mechanism that interrelates with pyromagnetic main tripgear at least; The shell (12) of auxiliary unit (10) holds an operating mechanism (14), and it comprises:
Tripping lever (30) by tripping relay (18) control with actuating coil and tripping operation cap (50);
Cap by relay (18) (50) passes to trip signal on the mechanical trip connecting rod (19) of the switching mechanism of breaker unit, to cooperate with above-mentioned relay (18) coil, makes circuit breaker trip;
A hook (32) that is installed between a handle (16) and the plate (24), this plate (24) pivotally are installed on first stationary spindle (26) that carries between position and the unloading position;
An energy-stored spring (60), when tripping lever (30) separated hook (32), it shifted plate (24) onto unloading position;
And the automatic involution lever in the centre of a relay (18) (44) since the action of plate (24) it move to unloading position, this lever (44) is hinged on second stationary spindle (46) of shell (12);
It is characterized by:
Plate (24) is supporting the 3rd hinge axle (28) of the short column (20) and the tripping lever (30) of mechanical trip connecting rod (19); Tripping lever (30) comprises that one makes it second arm that with the tripping operation cap (50) of relay (18) separate with one by being installed in the involution lever (44) that freely rotates on second axle (46) with the first arm that matches of hook (32).
2, according to the auxiliary trip unit of claim 1, it is characterized by: involution lever (44) is equipped with a damping spring (54), plate (24) comprises a thrust (56), when plate (24) when moving to unloading position, thrust (56) at first acts on the damping spring (54), and the involution power on spring (54) is applied to relay (18) with adjustment the cap (50) is set.
3, according to the auxiliary trip unit of claim 2, it is characterized by: damping spring (54) is processed into cylindricality, and before second axle (46) that involution lever (44) is installed to shell (12) went up, it installed on the involution lever (44) in advance.
4, according to the auxiliary trip unit of claim 1, it is characterized by: plate (24) is provided with an indicator symbol (66), it is towards a display aperture (68) of the front panel that is located at shell (12), and when plate (24) was in stable unloading position, indication auxiliary unit (10) tripped.
5, according to the auxiliary trip unit of claim 1, it is characterized by: involution lever (44) interrelates with a retainer spring (70), when plate (24) is in the carrying position, this spring (70) leans against on second arm of tripping lever (30) above-mentioned lever, and in the carrying position, tripping operation cap (50) separates a predetermined distance with involution lever (44) at relay (18).
6, according to the auxiliary trip unit of claim 1, it is characterized by: hook (32) comprises a hook lever (31), it is upward installed for limited rotationally in the 4th axle (34) of plate (24), and by a drive link (36) and handle (16) mechanical couplings.
7, according to the auxiliary trip unit of claim 1, it is characterized by: the actuating coil of tripping relay (18) links to each other with a differential current detector.
8, according to the auxiliary trip unit of claim 1, it is characterized by: the actuating coil of tripping relay (18) constitutes a shunt trip MX thus by an external remote control circuit controls.
9, according to the auxiliary trip unit of claim 1, it is characterized by: tripping relay (18) works to operating mechanism (14) according to the magnitude of voltage that monitors, and constitutes a undervoltage tripping device MN thus.
CN89101031A 1988-03-04 1989-03-03 Oprating mechanism of an auxiliary trip unit for modular circuit breaker Expired - Lifetime CN1021168C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802907A FR2628262B1 (en) 1988-03-04 1988-03-04 CONTROL MECHANISM OF A TRIGGERING AUXILIARY BLOCK FOR MODULAR CIRCUIT BREAKER
FR8802907 1988-03-04

Publications (2)

Publication Number Publication Date
CN1036862A CN1036862A (en) 1989-11-01
CN1021168C true CN1021168C (en) 1993-06-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN89101031A Expired - Lifetime CN1021168C (en) 1988-03-04 1989-03-03 Oprating mechanism of an auxiliary trip unit for modular circuit breaker

Country Status (6)

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EP (1) EP0331586B1 (en)
JP (1) JP2778974B2 (en)
CN (1) CN1021168C (en)
DE (1) DE68907424T2 (en)
FR (1) FR2628262B1 (en)
ZA (1) ZA891136B (en)

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EP0331586A1 (en) 1989-09-06
ZA891136B (en) 1989-10-25
FR2628262B1 (en) 1995-05-12
CN1036862A (en) 1989-11-01
FR2628262A1 (en) 1989-09-08
EP0331586B1 (en) 1993-07-07
JP2778974B2 (en) 1998-07-23
DE68907424D1 (en) 1993-08-12
JPH0210622A (en) 1990-01-16
DE68907424T2 (en) 1994-02-03

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