CN201242983Y

CN201242983Y - Main contact device for selective protection circuit breaker

Info

Publication number: CN201242983Y
Application number: CNU2008201280419U
Authority: CN
Inventors: 敖登贵; 邓彦军
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2008-07-15
Filing date: 2008-07-15
Publication date: 2009-05-20
Anticipated expiration: 2018-07-15

Abstract

The utility model relates to a main contact terminal device of a selective protection circuit breaker. The main contact terminal device is provided with a bridge type moving contact terminal of a moving contact, a contact terminal support, a contact terminal spring and a static contact terminal of a static contact. The contact terminal spring is arranged at the inner part of the contact terminal support; one of the two arms of the contact terminal spring acts on the moving contact terminal and the other arm is limited by a pin shaft which is arranged on a shell. The moving contact terminal, the contact terminal support and the contact terminal spring are connected and arranged in a manner of a normally-closed contact terminal structure; a plurality of coupling structures are arranged on the contact terminal support; by the parallelism of the coupling structures, the on/off of a main contact terminal is controlled by an operating mechanism, an electromagnetic system and a short-circuit-proof communication mechanism of the circuit breaker. The main contact terminal device has the characteristics that: the structure is simple and reasonable, the volume is small and the production cost is low; when a short circuit fault is incurred in a circuit, the main terminal device can be opened by the electromagnetic system, thus leading the current to be, converted onto a branch circuit and what is more providing stable and reliable voltage insurance when the main contact terminal device is communciated.

Description

The main contact device of selective protective breaker

Technical field

The utility model relates to the main contact device of a kind of main contact device of low-voltage circuit breaker, particularly a kind of selective protective breaker.

Background technology

At present, miniature circuit breaker is widely used in the terminal distribution system, and miniature circuit breaker has the overload long delay and short circuit wink is moved two segment protects; for the superior and the subordinate's protection; in a single day short trouble appears in circuit or equipment, just may have the overstep tripping phenomenon and take place, and causes large-area power-cuts.Therefore need a kind of circuit breaker, when requiring circuit or equipment in a single day short trouble to occur, the line outage of short trouble only will occur with selective protection function, and other circuit normal power supply still.

Selective protective breaker is in order to realize trip protection function selectively, not only adopted main contact, also adopted secondary contact, this circuit breaker has proposed following necessary function to main contact and has required: the one, and the on/off of contact must be subjected to the parallel control of electromagnetic mechanism, operating mechanism and tripping mechanism; The 2nd, the volume of contact mechanism is as far as possible little, to meet the requirement of miniature circuit breaker; The 3rd, the on/off reliable in action does not allow to return to on-position under short-circuit condition; The 4th, electric arc is little, to guarantee safe class.

The selective protective breaker of prior art is as No. 200520045094 disclosed selective protection switch of Chinese patent; this switch comprises tripping mechanism, operating mechanism, first contact, second contact and electromagnetic mechanism; wherein first contact is the executive component of circuit breaker, is mainly used in the circuit of connection and disjunction major loop.Second contact is used to control the on/off in branch road loop.For two cover contacts from the same circuit breaker of function difference, the contact that will control the major loop on/off usually is referred to as main contact, and the contact of control branch road loop on/off is referred to as secondary contact.

The following problem of main contact device ubiquity of the selective protective breaker of prior art: the one, the spring that contact contact pressure instability, its reason provide the contact contact force is heated when contact is connected, and its elastic force is changed; The 2nd, complex structure, volume are big; The 3rd, do not prevent under short-circuit condition, to return to the mechanism of on-position, at the short circuit current of electromagnetic mechanism when spending the moment of a half-wave zero crossing, might make main contact under short-circuit condition, return to unexpected make position, cause the damage of main contact by open position; The 4th, adopt the single-break formula, electric arc is big and extinguish slow.Therefore, people are devoted to improve the contact system of existing circuit breaker, improve job stability, reliability and the useful life of circuit breaker, reduce difficulty and production cost that low-voltage circuit breaker is made simultaneously.

The utility model content

The purpose of this utility model is to satisfy selective protective breaker of new generation for the requirement of main contact device with overcome above-mentioned defective of the prior art, provide a kind of volume little, simple and reasonable, be easy to make, the main contact device of selective protective breaker that production cost is low.

To achieve these goals, the main contact device of selectivity circuit breaker of the present utility model has adopted following technical scheme.Comprise bridge-type double break point moving contact and contact support thereof in the shell of described selective protective breaker with moving contact, fixed contact with fixed contact, at least one is used to provide the touch spring of the closed contact force of main contact, operating mechanism and electromagnetic system, described touch spring (19 and/or 20) is installed in contact and supports 13 inside, described moving contact 16, contact support 13 and touch spring (19 and/or 20) are pressed the connection of normally closed interlock version, so that described main contact device is under no external force effect, two moving contacts (2,10) respectively with two fixed contacts (4,12) auto-closing; Described electromagnetic system 106 is provided with anti-short circuit making mechanism, is used to prevent that main contact from returning to on-state by the disjunction state under the not cut as yet situation of short circuit current; Support to be provided with a plurality of coupled structures on 13 at described contact, be used to accept the coupling of the anti-short circuit making mechanism of the operating mechanism 101 of described selective protective breaker and/or electromagnetic system 106 and/or electromagnetic system.

When the anti-short circuit making mechanism of described operating mechanism 101 and/or electromagnetic system 106 and/or electromagnetic system by described coupled structure when contact support 13 applies a elastic acting force greater than touch spring (19 and/or 20), moving contact 16 is with the fixed contact disjunction and/or rest on the disjunction state; When the anti-short circuit making mechanism of described operating mechanism 101 and/or electromagnetic system 106 and/or electromagnetic system did not all have active force to contact support 13, moving contact 16 can be automatically and the fixed contact closure.

Described normally closed interlock structure is that an arm by touch spring is connected in moving contact 16, forms and another arm of touch spring is connected in the bearing pin 5 that is fixed on the shell 1.Described touch spring is a torsion spring, and it is sleeved on the pivot 15 fixing on the described shell 1.

Described coupled structure is formed in convex surface 50 and/or the groove 30 and/or the arm of force 40 in the contact support 13.Described release pin 7 couplings that are formed on groove 30 with the operating mechanism 101 of selective protective breaker of the coupled structure in the contact support 13.Described STATEMENT OF FEDERALLY SPONSORED 60 couplings that are formed on convex surface 50 with the electromagnetic system 106 of selective protective breaker of the coupled structure in the contact support 13.Described anti-short circuit making mechanism constitutes by being arranged on the fork 80 on the electromagnetic system 106 and stopping arm 90, by with described contact support 13 on the coupling of the arm of force 40 form.

Described

fixed contact

4,12 is connected with the binding post of the major loop of selective protective breaker respectively, and with the on/off of control major loop, and described

fixed contact

4,12 is U type structural configuration, and this U type structure can improve the arc extinction performance of circuit breaker.Described bridge-type double-breakpoint structure, it is the two sides that is individually fixed in the two ends of moving contact 16 by two moving

contacts

2,10, the centre of moving contact 16 is by fixture 14 or be fixedly welded on contact and support an end of 13, and contact support 13 is installed on the pivot 15 pivotally.

The main contact of circuit breaker of the present utility model can be opened by electromagnetic system when circuit is short-circuited fault, and current conversion is gone to the branch road loop, and what is more important provides pressure stable to guarantee in the time of can connecting for main contact device.It can not only parallelly accept the on/off operation of multichannel controlling organizations such as operating mechanism, electromagnetic mechanism, and can also cooperate with electromagnetic mechanism, avoid occurring in the short circuit current zero crossing during moment main contact return to the danger of on-position by open position.Its functional performance can not only satisfy the requirement of selective protective breaker well, but also can satisfy the requirement of other miniature circuit breaker.

Description of drawings

Fig. 1 is the fundamental diagram of an embodiment of selective protective breaker of the present utility model, there is shown the control and the matching relationship of other parts of main contact device and circuit breaker.

Fig. 2 is the structural representation of first embodiment of the main contact device of selective protective breaker of the present utility model, and main contact is in off-state among the figure.

Fig. 3 is the structural representation of first embodiment of the main contact device of selective protective breaker of the present utility model, and main contact is in closure state among the figure.

Fig. 4 is the structural representation of touch spring of first embodiment of main contact device.

Fig. 5 is the structural representation of second embodiment of the main contact device of selective protective breaker of the present utility model, there is shown the situation of the servicing unit coupling of main contact device and electromagnetic system and electromagnetic system, and main contact is in closure state among the figure.

Fig. 6 is the structural representation of second embodiment of the main contact device of selective protective breaker of the present utility model, and main contact is in the disjunction state of large opening among the figure.

Fig. 7 is second structural representation of implementing of the main contact device of selective protective breaker of the present utility model, and main contact is in the off-state of short circuit current zero crossing during moment among the figure.

Embodiment

Below in conjunction with the non-limiting examples shown in the accompanying drawing 1-7, describe the main contact device of selective protective breaker of the present utility model in detail.Understanding of the present utility model is not limited to the description of following specific embodiment.

As shown in Figure 1; selective protective breaker has major loop and branch road loop; string has electromagnetic system 106, main contact device 102 and major loop bimetal leaf 107 on the described major loop, and string has branch road loop contact apparatus 103, branch road loop bimetal leaf 104 and current-limiting resistance 105 on the branch road loop.Described branch road loop is parallel to the two ends of main contact device 102.The main contact device 102 of selective protective breaker of the present utility model is crucial parts in the selective protective breaker, and it carries out the disjunction/closure of major loop under operating mechanism 101 and electromagnetic system 106 parallel controls.

Normal the combined floodgate is that main contact device and branch road loop contact mechanism all are under the situation of closure state, because string has current-limiting resistance 105 in the branch road loop, so electric current mainly is to flow through from major loop through main contact device.When being short-circuited fault, after electromagnetic system 106 is pushed main contact the disjunction state of large opening to by closure state, because short circuit current can make electromagnetic system forfeiture work magnetic force at zero crossing during moment, so existence main contact when short circuit current does not cut off is as yet returned to the possibility of closure state by the disjunction state, in a single day this may becoming a reality, then will burn out contact, even security incident will take place.For fear of the generation of this danger, adopting a kind of main contact that can stop when short circuit current does not cut off as yet is very necessary by the anti-short circuit making mechanism that the disjunction state returns to closure state.Circuit breaker of the present utility model has solved this problem well, when short trouble occurring, electromagnetic system 106 is pushed to main contact the disjunction state of large opening by closure state, thereby cut-out major loop, electric current changes automatically from branch road loop stream mistake, promptly when short-circuit state occurring, the electric current on the major loop can be transformed into the branch road loop and get on, and realizes the current selective function of circuit breaker.This moment, selective protective breaker still was in the connection operating state, but the restriction of short circuit current restricted flow resistance 105 reduces greatly.If this moment, the next stage circuit breaker was in time carried out tripping operation cutting-off of short-circuit electric current; then electromagnetic system is lost thrust to main contact device because of the magnetic force of losing the job; make main contact device return to closure state automatically, selective protective breaker returns to normal "on" position again.If the next stage circuit breaker is not in time carried out tripping operation cutting-off of short-circuit electric current; then the tripping mechanism that branch road loop bimetal leaf 104 and/or main circuit bimetal leaf 107 can control operation mechanisms 101 after is after a while threaded off; make the selective protective breaker disjunction; main contact remains on the disjunction state under the control of tripping mechanism, can not return to closure state automatically.Can learn from the control and the controlled operation principle of above main contact device selective protective breaker; design the control and a required coupled structure of Be Controlled that can satisfy the various controlling organizations of selective protective breaker to main contact device; it is a difficult point of main contact device design; by this coupled structure, should make main contact device can accept control, Be Controlled and/or the operation of operating mechanism, electromagnetic system and anti-short circuit making mechanism at least.

Shown in Fig. 2,4, main contact device 102 is installed in the shell 1 of circuit breaker, and it comprises: the bridge-type double break point moving contact 16 that is provided with moving

contact

2,10; Contact supports 13; Be provided with the fixed contact 4 of fixed contact 3; Be provided with the fixed contact 12 of fixed contact 11; Fixed contact 4 is U type structural configuration with fixed contact 12; A pivot 15 that is fixed on the shell 1; Two

touch springs

19,20 of closed contact force being provided for main contact 16; A bearing pin 5 that is fixed on the shell 1.Contact supports 13 to fixedly connected with bridge-type double break point moving contact 16 by rivet 14 or by the mode of welding in the centre position of bridge-type double break point moving contact 16, and is installed in pivotally on the pivot 15 on the shell 1.Fixed contact 4 with fixed contact 3 cooperates with bridge-type double break point moving contact 16 with the fixed contact 12 with fixed contact 11, realizes the disjunction/closure of major loop.Touch

spring

19,20 is installed in contact and supports 13 inside, and is sleeved on the pivot 15.Touch

spring

19,20 has

arm

9,18 and 6,17 respectively, and wherein

arm

9,17 acts on the moving contact 16, and

arm

6,18 is connected bearing pin 5.

From the above description as can be seen, the main contact device of selective protective breaker of the present utility model has following design feature.At first be to have adopted the bridge-type double-breakpoint structure, promptly have 3,11 and two moving

contacts

2,10 of two fixed contacts, the two sides, two ends that two moving

contacts

2,10 are formed on same moving contact 16 makes moving contact 16 form the bridge form of touching, the advantage of bridge-type double-breakpoint structure is: can obtain higher voltage-current characteristic under less clearance, to dwindle the disjunction distance of dynamic and static contact, make more compact structure, the volume of main contact device littler, also can reduce electric arc simultaneously and accelerate arc extinction, thereby improve the breaking capacity of main contact.Next is to have adopted rotation on/off structure, promptly two moving

contacts

2,10 are with the form of rotating around pivot 15 and fixed

contact

3,11 disjunctions/closure, the advantage of rotary on/off structure is: the moving equilibrium of moving contact 16 is reliable, the stress balance of main contact system, be easy to realize supporting 13 1 elements and the parallel coupling of a plurality of controlling organizations, and make coupled structure simpler, more reliable by contact.The 3rd is that fixed contact (4,12) is U type structural configuration, and this U type structure can improve the arc extinction performance of circuit breaker.The 4th has adopted the normally closed interlock structure, be that main contact often is in closure state under no external force effect, the closed contact force of dynamic and static contact is provided by the

touch spring

19,20 of self, the advantage of this structure is: be convenient to realize accepting the coupling of a plurality of parallel controlling organizations, make coupling and control between main contact device and the controlling organization become very simple.When power of input, just the main contact disjunction can be made, when cancelling the power of input, just the main contact closure can be made; Do not disturb because dynamic and static contact has external force when closure, therefore closed contact force is stable, reliable.

The mounting structure of

touch spring

19,20 is convenient to the heat of moving contact 16 is better distributed by pivot 15 and bearing pin 5, heat is evenly distributed, avoid heat to focus on casing and make its distortion or heat concentrate on touch spring the closed contact force of dynamic and static contact is reduced.

Support an end of 13 at contact, be provided with a plurality of coupled structures, convex surface 50, groove 30 or the arm of force 40 of these coupled structures as shown in Fig. 2,5.Masterpiece of arbitrary controlling organization output in the controlling organization of selective protective breaker (as operating mechanism, electromagnetic system) is used contact and is supported convex surface 50 or the groove 30 or the arm of force 40 in the coupling mechanism on 13; all can make contact support 13 make the counter clockwise direction shown in Fig. 1 and rotate, drive dynamic and static contact and be converted to disjunction state (state shown in Fig. 2,6) by closure state (state shown in Fig. 3,5).Under the disjunction state, there is a resistance shelves thing in the backhaul track of the convex surface 50 in the selective protective breaker, groove 30 or the arm of force 40, all can make dynamic and static contact by disjunction state (state shown in Fig. 2,6) and stop at disjunction state shown in Fig. 2,7.Have only after the controlling organization in the selective protective breaker is all withdrawn from active force (as thrust, barrier force) to main contact device, the moving contact 16 of main contact device is just got back to the closure state (state shown in Fig. 3,5) with fixed contact automatically under the elastic force effect of touch spring.

Fig. 2,3 shows first embodiment of the operating mechanism coupling of main contact device of the present utility model and selective protective breaker; as shown in the figure; the release pin 7 of operating mechanism 101 is supported 13 movement locus by the contact that groove 8 stretches to main contact device, and supports a groove 30 of the coupled structure on 13 to be coupled with contact.When operating mechanism 101 is carried out closing operation, release pin 7 on it arrives position shown in Figure 3, this moment, release pin 7 did not contact with groove 30, main contact device is in no external force active state, thereby moving contact 16 from trend fixed contact closure, connects major loop under the elastic force effect of touch spring 19,20.When operating mechanism 101 is carried out sub-switching operation or the tripping operation of breaking down (tripping operation of being carried out by the operating mechanism of major loop bimetal leaf 107 controls when overload current occurring as major loop), release pin 7 on it is mobile to counterclockwise along groove 8, and promote contact supports 13 by groove 30 and rotate counterclockwise, stop and stop the backhaul of contact support 13 up to position shown in Figure 2, thereby make dynamic and static contact be converted to the disjunction state and moving contact 16 is stabilized in disjunction state shown in Figure 2, major loop is disconnected by closure state.

Fig. 5,6,7 shows the electromagnetic system of main contact device of the present utility model and selective protective breaker and second embodiment of anti-short circuit making mechanism coupling.The groove 30, the arm of force 40 and the convex surface 50 that are formed in the contact support 13 all are described coupled structures, groove 30 is used for the coupling (this coupling being described specifically at first embodiment) with operating mechanism 101, the arm of force 40 is used for the coupling with anti-short circuit making mechanism, and convex surface 50 is used for the coupling with electromagnetic system 106.Described anti-short circuit making mechanism is meant and prevents that main contact from being returned to the mechanism of on-state by the disjunction state under the not cut as yet situation of short circuit current, this mechanism is auxiliary to be arranged on the electromagnetic system 106, at least constitute by pivot pin 70, fork 80 and obstruction arm 90, so also cry auxiliary body.One end of fork 80 is installed on the pivot pin 70, and around its rotation, the other end be provided with one with fork 80 with stop the idle stroke syndeton that arm 90 is connected, make obstruction arm 90 moved as straight line by the driving of fork 80.Because described idle stroke syndeton is provided with idle stroke, institute is so that the swing that can lag behind fork 80 is moved in the revolution of obstruction arm 90.Be under the normal "on" position at selective protective breaker, operating mechanism 101, electromagnetic system 106 all do not apply active force for main contact device, make dynamic and static contact be in closure state, major loop connection.When short circuit current appears in major loop; electromagnetic system 106 produces magnetic force and promotes the convex surface 50 of main contact device by the gangbar on it 60; make contact support the 13 related arm of forces 40 and moving contact 16 to rotate counterclockwise; up to position shown in Figure 6; in this process; the obstruction arm 90 that the magnetic force that electromagnetic system 106 produces promotes anti-short circuit making mechanism by fork 80 extend in the backhaul track of the arm of force 40 of main contact system shown in Figure 6; make; fixed contact is in the disjunction state; major loop disconnects; but because of electric current is automatically brought to the branch road loop, so selective protective breaker still is in on-state.At this state; if electromagnetic system 106 loses magnetic force temporarily because of current zero-crossing point moment; then STATEMENT OF FEDERALLY SPONSORED 60 can be return certain distance and be arrived position shown in Figure 7; contact supports that 13 also can be at touch spring 19; return to position shown in Figure 7 to clockwise direction under 20 the elastic force effect; but because anti-short circuit making mechanism has the idle stroke syndeton; make the revolution that stops arm 90 move the swing that can lag behind fork 80; still be trapped in the origin-location so stop arm 90; and stopped the arm of force 40 backhauls of main contact device and stoped moving contact 16 to the fixed contact closure; prevented under short-circuit condition moving; the connection of quiet head; make major loop disconnect (as shown in Figure 7), selective protective breaker still is in on-state.At this state: if the next stage circuit breaker has cut off short circuit current, then lose magnetic force fully because of electromagnetic system 106, then STATEMENT OF FEDERALLY SPONSORED 60 can return to position shown in Figure 5, the obstruction arm 90 of anti-short circuit making mechanism is under the driving of the fork 80 of electromagnetic system, remove stopping and return to position shown in Figure 5 to the arm of force 40, main contact device returns to the state of no external force effect again, thereby make dynamic and static contact apparatus return to closure state, main circuit recovery connection again, selective protective breaker recovers on-state; If the next stage circuit breaker does not have cutting-off of short-circuit electric current; then branch road loop bimetal leaf 104 and/or major loop bimetal leaf 107 can generate heat crooked; when the short circuit short time delay arrives thresholding; trigger action mechanism 101 threads off; the release pin 7 of operating mechanism 101 is done moving counterclockwise shown in Fig. 2; and promote contact supports 13 by groove 30 and arrive and rest on position shown in Figure 2; make dynamic and static contact be in disjunction state, major loop disconnection; selective protective breaker is in tripped condition, and this moment, the branch road loop also disconnected simultaneously.The beneficial effects of the utility model one are to improve the connection and the breaking capacity in loop, the 2nd, the pressure stable assurance is provided when connecting for main contact device, and the 3rd, effectively prevent the phenomenon that the shell of circuit breaker is heated and deforms.

Claims

1. the main contact device of a selective protective breaker; comprise operating mechanism and electromagnetic system in the shell of described circuit breaker; described main contact device comprises bridge-type double break point moving contact and the contact support thereof with moving contact, the fixed contact with fixed contact, at least one is used to provide the touch spring of the closed contact force of main contact, it is characterized in that:

Described touch spring (19 and/or 20) is installed in the inside of contact support (13),

Described moving contact (16), contact support (13) and touch spring (19 and/or 20) are pressed the connection of normally closed interlock version, so that described main contact device is under no external force effect, two moving contacts (2,10) respectively with two fixed contacts (4,12) auto-closing;

Described electromagnetic system 106 is provided with anti-short circuit making mechanism, is used to prevent that main contact from returning to on-state by the disjunction state under the not cut as yet situation of short circuit current;

In described contact support (13), be provided with the coupled structure of coupling of the anti-short circuit making mechanism of the operating mechanism (101) of the described selective protective breaker of a plurality of acceptance and/or electromagnetic system (106) and/or electromagnetic system; When the anti-short circuit making mechanism of described operating mechanism (101) and/or electromagnetic system (106) and/or electromagnetic system by described coupled structure when contact support (13) applies a elastic acting force greater than touch spring (19 and/or 20), moving contact (16) is with the fixed contact disjunction and/or rest on the disjunction state; When the anti-short circuit making mechanism of described operating mechanism (101) and/or electromagnetic system (106) and/or electromagnetic system to contact support (13) when all not having active force, moving contact (16) is automatically and the fixed contact closure.

2. the main contact device of selective protective breaker according to claim 1; it is characterized in that: described normally closed interlock structure; be that a arm (9 and/or 17) by touch spring (19 or 20) is connected in moving contact (16), form and another arm (6 and/or 18) of touch spring (19 or 20) is connected in the bearing pin (5) that is fixed on the shell (1).

3. the main contact device of selective protective breaker according to claim 1, it is characterized in that: described coupled structure is formed in convex surface (50) and/or the groove (30) and or the arm of force (40) in the contact support (13).

4. according to the main contact device of claim 1 or 3 described selective protective breakers, it is characterized in that: described release pin (7) coupling that is formed on groove (30) with the operating mechanism (101) of selective protective breaker of the coupled structure in the contact support (13).

5. according to the main contact device of claim 1 or 3 described selective protective breakers, it is characterized in that: described STATEMENT OF FEDERALLY SPONSORED (60) coupling that is formed on convex surface (50) with the electromagnetic system (106) of selective protective breaker of the coupled structure in the contact support (13).

6. according to the main contact device of claim 1 or 3 described selective protective breakers; it is characterized in that: described anti-short circuit making mechanism constitutes by being arranged on the fork 80 on the electromagnetic system (106) and stopping arm (90), by with described contact support (13) on the coupling of the arm of force (40) form.

7. the main contact device of selective protective breaker according to claim 1 and 2, it is characterized in that: described touch spring (19 and/or 20) is a torsion spring, it is sleeved on described shell (1) and goes up on the fixing pivot (15).

8. the main contact device of selective protective breaker according to claim 1, it is characterized in that: described fixed contact (4,12) is U type structure, is connected with the binding post of the major loop of selective protective breaker respectively, with the on/off of control major loop.

9. the main contact device of selective protective breaker according to claim 1; it is characterized in that: described bridge-type double-breakpoint structure; it is the two sides that is individually fixed in the two ends of moving contact (16) by two moving contacts (2,10); the centre of moving contact (16) is by fixture (14) or be fixedly welded on an end of contact support (13), and contact support (13) is installed on the pivot (15) pivotally.