CN206877791U - High current choking winding - Google Patents
High current choking winding Download PDFInfo
- Publication number
- CN206877791U CN206877791U CN201720335927.XU CN201720335927U CN206877791U CN 206877791 U CN206877791 U CN 206877791U CN 201720335927 U CN201720335927 U CN 201720335927U CN 206877791 U CN206877791 U CN 206877791U
- Authority
- CN
- China
- Prior art keywords
- iron core
- shapes
- high current
- coil
- choking winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
High current choking winding, including E shapes iron core, skeleton and I shape iron cores, the E shapes iron core includes a spreader, two lateral columns on spreader, a center pillar, the center pillar is between two lateral columns, the I shapes iron core is contacted with lateral column, center pillar, and the skeleton is set on center pillar, and the coil on skeleton uses enamel-cover copper conductor, the enamel-cover copper conductor periphery uses one layer of the first adhesive tape winding, and the end of a thread section and line endpiece of the enamel-cover copper conductor are arranged silica gel sleeve pipe respectively.This choking winding avoids the Kelvin effect brought during single line coiling by the way of Double-wire parallel wound, improves the operating efficiency of choking winding；Effectively increase the safety and stability of choking winding in use.
Description
Technical field
The utility model belongs to electronic technology field, and in particular to a kind of high current choking winding.
Background technology
Reactor is also inductor, plays a part of impedance in circuit, and a conductor will be occupied by it when being powered
Certain space scope produce magnetic field, so it is all can the electric conductor of current-carrying have perception in general sense.But the length that is powered
The inductance of straight conductor is smaller, and caused magnetic field is not strong, therefore actual reactor is that wire is coiled into helical form of tubes, is claimed hollow
Reactor；Sometimes for allowing this solenoid that there is bigger inductance, iron core is just inserted in solenoid, claims iron core reactor.
Reactance is divided into induction reactance and capacitive reactance, and the classification for comparing science is that impedor (inductor) and capacitive reactance device (capacitor) are referred to as reactance
Device, the capacitor described in daily people is exactly capacitive reactance device, and reactor refers exclusively to inductor.Reactor is employed, short circuit is occurring
When, the voltage drop on reactor is larger, so also playing the effect for maintaining busbar voltage horizontal, makes the voltage pulsation on bus
It is smaller, it ensure that the stability of user's electric equipment operation on non-fault line.Reactor is as reactive-load compensation means, in electricity
It is indispensable in Force system.
As one kind in core-type reactor, EI type high current anti-current devices, its iron core is by " E " shaped iron core and " I " type
What iron core stacked up, the single angle of single line coil is around being located on " E " shaped iron core.The reactor of this structure, pass through " E " sections
Core and " " shaped iron core is superimposed I, and both contact surfaces have a larger air gap, and the effect of air gap is to reduce magnetic conductivity, makes coil characteristics
The initial permeability of core material is less dependent on, but air gap is excessive so that magnetic resistance is also big, will in the case of reducing magnetic conductivity
Ask wire circle more, related copper loss also increases；And the single angle of single line coil is around being located at " E " shaped iron core, once big electricity
It is out-of-date to flow through, and coil has Kelvin effect, reduces the hindrance function of whole EI types high current anti-current device.
Therefore, there is the shortcomings that volume is big, loss is also high in traditional EI types high current anti-current device, have impact on reactor product
Operating efficiency, reduce the security that reactor uses.
Utility model content
The purpose of this utility model is to solve the problems, such as that traditional EI types high current anti-current body product is big, loss is high, carry
For a kind of high current choking winding.
In order to reach above-mentioned purpose of utility model, the utility model uses following technical scheme：
High current choking winding, including E shapes iron core, skeleton and I shape iron cores, the E shapes iron core include a spreader, located at horizontal stroke
Two lateral columns, a center pillar on post, between two lateral columns, the I shapes iron core contacts the center pillar with lateral column, center pillar,
The skeleton is set on center pillar, and the coil on skeleton uses enamel-cover copper conductor, and the enamel-cover copper conductor periphery uses the first glue
One layer of winding of band, the end of a thread section and line endpiece of the enamel-cover copper conductor are arranged silica gel sleeve pipe respectively.The all exposed list of traditional coiling
Line reduces the operating efficiency of coil directly around being located on skeleton.
Further, a copper tip is respectively welded in the end of the end of a thread section and the end of line endpiece.
Further, the end of the end of a thread section and the weld of the end of line endpiece and copper tip are provided with heat-shrinkable T bush.
Further, the coil is enamel-cover copper conductor Double-wire parallel wound, and around some layers of skeleton winding, every layer is different or phase
Same some numbers of turn.
Further, the first DMD insulating papers are provided between any two layers in some layer line circles.DMD insulating papers, full name
For polyester film and polyester fibre nonwoven fabric softness composite article, there are good mechanical strength, dielectric properties and higher heat-resisting
Performance.
Further, the 2nd DMD insulating papers are arranged with the outside of the coil.
Further, if the E shapes iron core is formed by stacking by dry plate E shape silicon steel sheets, if the I shapes iron core is by dry plate I shape silicon
Steel disc is formed by stacking, if if being all connected between dry plate E shape silicon steel sheets, between dry plate I shape silicon steel sheets by bolt, nut.
Further, in addition to the second epoxy plate and the 3rd DMD insulating papers, the E shapes iron core, the second epoxy plate, the 3rd DMD
Insulating paper and I shapes iron core stack setting successively.Epoxy plate and the 3rd DMD insulating papers are arranged between E shapes iron core and I shape iron cores
Gap position.Epoxy plate full name is epoxy glass fiber plate, has high machinery and the preferable heat resistance of dielectric properties and moisture resistance
Property.
Further, the coil upper surface, lower surface are located at center pillar both sides, form four with E shapes iron core, I shapes iron core and connect
Contacting surface, is provided with the first epoxy plate between the coil and contact surface, the first epoxy plate plays retarder and E shapes iron core or I shapes
Iron core, the effect for avoiding both from contacting.
Further, the 3rd epoxy plate is provided between the coil and lateral column, while being effectively isolated lateral column with coil, is also risen
The effect of fastening E shapes iron core and coil.
Further, the skeleton uses red steel paper sleeve, if skeleton periphery parcel is provided with the adhesive tape of dried layer second.
Further, the first redwood packing ring, first are sequentially provided between the head of the bolt and E shapes iron core or I shape iron cores
Flat steel washer.
Further, the second redwood packing ring, the second flat steel pad are sequentially provided between nut and E shape iron core or I the shape iron core
Circle.
Further, by setting L-shaped support frame to fix between the lateral column of the E shapes iron core, I shape iron cores.
Further, the E shapes silicon steel sheet, I shapes silicon steel sheet use EI133.2/50W470 models.
Compared with prior art, beneficial effect is the utility model：
1 is directed to high current, and this choking winding avoids the skin effect that becomes brought during single line coiling by the way of Double-wire parallel wound
Answer, improve the operating efficiency of choking winding；
2 wrap up copper cash elder generation winding E shape iron cores before coiling using adhesive tape so that choking winding is resistant to more than 10000 volts
High pressure, prevented short-circuit hidden danger existing for winding inter-turn；
3. a choking winding uses EI133.2/50W470 silicon steel sheets, reduce temperature rise, relative to the transformer of same power,
It is smaller using the volume of transformer of this choking winding；
4. effectively increase the safety and stability of choking winding in use.
Brief description of the drawings
Fig. 1 is the positive direction schematic diagram of choking winding；
Fig. 2 is the left view direction schematic diagram of choking winding；
Fig. 3 is the overlook direction schematic diagram of choking winding.
In figure：E shapes iron core 1, spreader 11, lateral column 12, skeleton 2, I shapes iron core 3, upper surface 31, coil 4, the end of a thread section 41, line
Endpiece 42, copper tip 5, silica gel sleeve pipe 6, heat-shrinkable T bush 7, bolt 8, nut 9, the first flat steel washer 10, the first redwood packing ring 20,
L-shaped clamp bar 30, the first epoxy plate 40, the second epoxy plate 50, the 3rd epoxy plate 60, air gap 70, the 3rd DMD insulating papers 80, installation
Hole 90.
Embodiment
Explanation is further described to the technical solution of the utility model below by specific embodiment so that scheme is more
It is clear.
Embodiment 1
As Figure 1-3, the present embodiment is related to a kind of high current choking winding, includes E shapes iron core 1, skeleton 2 and I shapes
Iron core 3, playing E shapes iron core includes a spreader 11, two lateral columns, 12, center pillars on spreader, and the center pillar is located at two
Between individual lateral column, I shapes iron core 3 is contacted with lateral column 12, center pillar, and the skeleton 2 is set on center pillar, and coil 4 is led using enamel-cover copper
For line around being located on skeleton 2, enamel-cover copper conductor periphery uses one layer of the first adhesive tape winding, the end of a thread section 41 and line of the copper conductor
Endpiece 42 is arranged silica gel sleeve pipe 6 respectively.
Enamel-cover copper conductor periphery uses the first one layer of adhesive tape half-stack package winding, and half-stack package refers to next circle in winding process
There is half overlapping with above one circle.
As a kind of preferable concrete structure, coil 4 uses enamel-cover copper conductor Double-wire parallel wound, some around skeleton winding
Layer, the number of turn of every layer of winding can be similar and different.First adhesive tape is around being located on the periphery of two-wire.
A copper tip 5 is respectively welded in the end of the end of a thread section 41 and the end of line endpiece 52.
The end of the end of a thread section 41 and the end of line endpiece 52 and the weld of copper tip 5 are provided with heat-shrinkable T bush 7.
One layer of the first DMD insulating paper is all set between any two layers.
Embodiment 2
It is not both that in the present embodiment, the 2nd DMD insulating papers are also arranged with the outside of whole coil with embodiment 1.
Embodiment 3
Unlike the embodiments above, E shapes iron core 1, I shapes iron core 3 in the present embodiment are respectively correspondingly-shaped
If dry plate E shapes silicon steel sheet, I shapes silicon steel sheet are superimposed, pass through spiral shell respectively between multiple E shapes silicon steel sheets, between multiple I shapes silicon steel sheets
Bolt, nut are connected.
E shapes silicon steel sheet, I shapes silicon steel sheet in the present embodiment are installed using direct bolt 8 and fixed all using there is hole black-film,
And the insulated paint that active surface is provided with effectively insulate.
Bolt 8 is from the front of E shapes iron core 1 or I shapes iron core 3 through the back side, the back side fixing bolt of nut 9.
Embodiment 4
Unlike the embodiments above, high current choking winding in the present embodiment also includes the second epoxy plate 50 and the
Three DMD insulating papers 80, E shapes iron core 1, the second epoxy plate 50, the 3rd DMD insulating papers 80 and I shapes iron core 3 stack setting successively.
Coil upper surface, lower surface are separated by center pillar, and four contact surfaces, the contact are formed with E shapes iron core, I shapes iron core
Face is provided with the first epoxy plate 40.
In the side line parlor of iron core two, i.e., the 3rd epoxy plate 60 is set between coil 4 and lateral column 11.
Embodiment 5
Unlike the embodiments above, the high current choking winding in the present embodiment is on the head of bolt 8 and E shape iron cores
The first redwood packing ring 20, the first flat steel washer 10 are sequentially provided between 1 or I shapes iron core 3.
Nut and the first redwood packing ring 20, the first flat steel washer 10 are also sequentially provided between E shapes iron core or I shape iron cores.
Embodiment 6
Unlike the embodiments above, the skeleton 2 of the high current choking winding in the present embodiment uses red steel paper sleeve.
In the periphery of skeleton 2, parcel is provided with least one layer of second adhesive tape.
Embodiment 7
It is unlike the embodiments above, the high current choking winding in the present embodiment, E shape iron cores lateral column 12 just
Face or the back side, I shape iron cores front or the back side between by setting L-shaped support frame to fix.
L-shaped support frame includes orthogonal first paragraph and second segment, and the top of first paragraph is connected with I shape iron cores by bolt
Connect, bottom and the E shape iron cores of first paragraph are bolted；Second segment is vertical with E shapes iron core (or I shapes iron core).
At least one mounting hole 90 is offered on second segment.
Embodiment 8
A kind of manufacture method for being used to manufacture above-mentioned high current coil, comprises the following steps：
1. enamel-cover copper conductor two-wire is parallel, bag 1/2 winding, one layer of first adhesive tape will be being folded on the periphery of parallel two-wire；
The adhesive tape of skeleton periphery winding second；
2. if by the enamel-cover copper conductor winding skeleton dried layer provided with the first adhesive tape, some circles of every layer of winding；Interlayer pads one
First DMD insulating papers；
3. the DMD insulating papers of winding the 2nd outside the coil that whole enamel-cover copper conductor winding is completed；
4. the end of a thread section, line endpiece in enamel-cover copper conductor are arranged silica gel sleeve pipe, the end of the end of a thread section, the end weldering of line endpiece
Copper tip is connect, heat-shrinkable T bush is arranged in weld；
5. silicon steel sheet is using there is pore structure, if including the superposition of dry plate E shapes silicon steel sheet, if dry plate I shapes silicon steel sheet is superimposed, bone
Frame is set on the center pillar of E shape iron cores, is bolted respectively between multiple E shapes silicon steel sheets, between multiple I shapes silicon steel sheets solid
It is fixed；
6. the second epoxy plate, the 3rd DMD insulating papers, E shapes iron core, the second epoxy plate, the 3rd DMD insulating papers and I shapes are set
Iron core stacks setting successively；
7. in the upper surface of coil, lower surface, positioned at center pillar both sides, four contact surfaces are formed with E shapes iron core, I shapes iron core,
First epoxy plate is set between coil and contact surface；3rd epoxy plate is set between coil and lateral column；
8. between the head of bolt and E shapes iron core or I shape iron cores, nut and between E shapes iron core or I shape iron cores all successively
Provided with the first redwood packing ring, the first flat steel washer；
By setting L-shaped support frame to fix between the lateral columns of 9.E shape iron cores, I shape iron cores.
Embodiment 9
As a kind of embodiment of specific data of embodiment 8, comprise the following steps and technical parameter：
1. coil turn is 41Ts, according to Fig. 1-3 using the two-wires of QZ-2/ Φ 2.24 clockwise and around every layer around 10+9+8+7+
For 7Ts altogether around 5 layers, interlayer pads a 0.5*62*320mmDMD paper, and 0.5*62*340mmDMD paper is opened in outsourcing one；Coil copper conductor
Start coiling after 2.24 two one layer of 1/2 half-stack packages of KPTON adhesive tapes with 0.025*20mm of Φ；The end of a thread and line tail are inserted in Φ 5*
In 70mm white silica gel sleeve pipe, sleeve pipe exposes skeleton 30mm；The end of a thread and line tail tighten fixation with abrasive band/adhesive tape respectively；
2. the end of a thread stays length to expose 40 ± 5mm of skeleton；The end of a thread welds OT14-6 copper tip；Weld set Φ 14*35mm
Black heat-shrinkable T bush；
3. silicon steel sheet material, which is 50W470, hole black-film；Inserted sheet is inserted using a knife, and it is 55mm to fold thickness；Iron core both sides L-shaped
One piece of 1*21*75mm epoxy plates isolation iron core is respectively put on clamp bar stationary positioned, the side of coil four；L-shaped clamp bar and M5*65mm ten are used below
Word screw rod is tentatively fixed；Intermediate air gap pads 2.0*55*133mm epoxy plates and each one piece of 0.25*55*133DMD paper, folds I shapes above
Piece, then respectively squeeze into 1 5*15*75 epoxy plates fastening iron core and coil in the side line parlor of iron core two；Iron core must consolidation, smooth, most
Tensioning threaded rods (+1 nut of+2 redwood packing rings of the flat steel washer of 1 screw rod+2) afterwards.
This choking winding uses EI133.2/50W470 silicon steel sheets, and choking winding is resistant to more than 10000 volts of high pressure.
Embodiment 10
Unlike the embodiments above, on the front of the E shape silicon steel sheets in this programme, specially lateral column is connected with spreader
Place is provided with first through hole, and first through hole is provided with the first flange, and the first flange sets the back side of E shape silicon steel sheets, so that E shape silicon
When steel disc is superimposed, superposition can be directly accurately positioned, avoids the superposition of E shape silicon steel sheets from misplacing.
The front of I shape silicon steel sheets is provided with the second through hole, and the second through hole is provided with the second flange, and the second flange sets E shape silicon steel
The back side of piece.The setting enables multiple I shapes silicon steel sheet stack added-time to be accurately superimposed
The lower surface both ends of I shape silicon steel sheets have groove, and the groove is used for the lateral column for accommodating E shape silicon steel sheets
End.During so that multiple I shapes silicon steel sheets fastening with I shapes silicon steel sheet, the upper end of lateral column can be inserted directly into groove, installed
Without carrying out other processes again after preliminary fixation with bolt by hand in journey.
The upper end of groove and lateral column coordinates for gap.
Carried out after the completion of whole piece safeties, then with bolt, various pads etc. through first through hole or the second through hole
Finally it is fastened and fixed.
Center pillar in E shape silicon steel sheets could be arranged to be less than lateral column.Most preferably lateral column of the height of center pillar more than 1/2 is high
Degree.Raw material is reused, reduces silicon steel sheet cost.
Embodiment 11
As different from Example 10, the silicon steel sheet that the E shapes silicon steel sheet of this programme, I shapes silicon steel sheet use is closed using Si-Fe
Jin Gang, the component and percentage of the Si-Fe steel alloys are as follows：
Silicon Si 4.79%,
Carbon C 1.9%,
Manganese Mn 0.23%,
Phosphorus P 0.13%,
Sulphur S 0.09%,
Tantalum Ta 0.007%,
CNT 0.002%,
Carbon black 0.05%,
Phenolic resin 0.28%,
Dissolved aluminum 0.006%,
Molybdenum 0.076%
Surplus is iron Fe.
This steel alloy has a higher-strength, and magnetic conductivity is good.
As preferable, ethylenediamine tetra-acetic acid 0.015% is further comprises in above-mentioned steel alloy.
It is above preferred embodiment of the present utility model, the scope of protection of the utility model is not limited, for ability
The deformation and improvement that field technique personnel make according to mentality of designing of the present utility model, should all be considered as protection of the present utility model
Within the scope of.
Claims (10)
1. high current choking winding, including E shapes iron core, skeleton and I shape iron cores, the E shapes iron core includes a spreader, located at spreader
On two lateral columns, a center pillar, the center pillar is between two lateral columns, and the I shapes iron core contacts with lateral column, center pillar, institute
State skeleton to be set on center pillar, it is characterised in that the coil on skeleton uses enamel-cover copper conductor, and the enamel-cover copper conductor periphery is adopted
With one layer of the first adhesive tape winding, the end of a thread section and line endpiece of the enamel-cover copper conductor are arranged silica gel sleeve pipe respectively.
2. high current choking winding according to claim 1, it is characterised in that the end of the end of a thread section and the end of line endpiece
A copper tip is respectively welded.
3. high current choking winding according to claim 2, it is characterised in that the end of the end of a thread section and line endpiece
The weld of end and copper tip is provided with heat-shrinkable T bush.
4. high current choking winding according to claim 1, it is characterised in that the coil be enamel-cover copper conductor two-wire simultaneously
Around around some layers of skeleton winding, every layer is similar and different some numbers of turn.
5. high current choking winding according to claim 4, it is characterised in that in some layer line circles any two layers it
Between be provided with the first DMD insulating papers.
6. high current choking winding according to claim 1, it is characterised in that be arranged with the 2nd DMD on the outside of the coil
Insulating paper.
7. high current choking winding according to claim 1, it is characterised in that also including the second epoxy plate and the 3rd DMD
Insulating paper, E shapes iron core, the second epoxy plate, the 3rd DMD insulating papers and the I shapes iron core stack setting successively.
8. high current choking winding according to claim 1, it is characterised in that the coil upper surface, lower surface are located at
Center pillar both sides, four contact surfaces are formed with E shapes iron core, I shapes iron core, the first epoxy plate is provided between the coil and contact surface.
9. high current choking winding according to claim 1, it is characterised in that the 3rd is provided between the coil and lateral column
Epoxy plate.
10. high current choking winding according to claim 1, it is characterised in that if the E shapes iron core is by dry plate E shape silicon
Steel disc is formed by stacking, if the I shapes iron core is formed by stacking by dry plate I shape silicon steel sheets, if if between dry plate E shape silicon steel sheets, dry plate I
All it is connected between shape silicon steel sheet by bolt, nut, between the head of the bolt and E shapes iron core or I shape iron cores successively
Provided with the first redwood packing ring, the first flat steel washer, the second redwood is sequentially provided between nut and E shape iron core or I the shape iron core
Packing ring, the second flat steel washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720335927.XU CN206877791U (en) | 2017-03-31 | 2017-03-31 | High current choking winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720335927.XU CN206877791U (en) | 2017-03-31 | 2017-03-31 | High current choking winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206877791U true CN206877791U (en) | 2018-01-12 |
Family
ID=61325566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720335927.XU Expired - Fee Related CN206877791U (en) | 2017-03-31 | 2017-03-31 | High current choking winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206877791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109308965A (en) * | 2018-09-14 | 2019-02-05 | 江西欧美亚电子有限公司 | A kind of transducer air conditioning reactor |
-
2017
- 2017-03-31 CN CN201720335927.XU patent/CN206877791U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109308965A (en) * | 2018-09-14 | 2019-02-05 | 江西欧美亚电子有限公司 | A kind of transducer air conditioning reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107369534A (en) | A kind of three-phase solid laminated core transformer | |
| CN204407147U (en) | A kind of grounding transformer | |
| CN206877791U (en) | High current choking winding | |
| CN202221691U (en) | Resin pouring three-dimensional rolled iron core amorphous alloy dry type transformer | |
| CN101436461A (en) | Structure of amorphous alloy oil immersion type distribution transformer and manufacturing method thereof | |
| CN206134459U (en) | Many windings high -frequency transformer | |
| CN109494060A (en) | A kind of low pressure multi-tap transformer being capable of providing multiple voltage grade | |
| CN201859744U (en) | Return yoke pull rod clamping structure for oil-immersed electric reactor | |
| CN107154305A (en) | High current choking winding | |
| CN206864283U (en) | A kind of resistance to shorting structure of amorphous alloy transformer | |
| CN101192467B (en) | Amorphous alloy ground transformer body structure | |
| CN201673789U (en) | Three-phase amorphous alloy all-aluminum epoxy resin dry type power transformer core | |
| CN205881649U (en) | Transformer | |
| CN201812647U (en) | Dry type grounding transformer | |
| CN205881642U (en) | Unshakable in one's determination and have this transformer unshakable in one's determination | |
| CN201315231Y (en) | An oil-immersed transformer low-voltage winding | |
| CN206163284U (en) | Anti short circuit transformer | |
| CN207233531U (en) | A kind of three-phase solid laminated core transformer | |
| CN208157216U (en) | A kind of 220kV Three-phase oil immersion type hollow current-limiting reactor | |
| CN106373756A (en) | Anti-short circuit transformer and preparation technology thereof | |
| CN201681701U (en) | Amorphous alloy transformer | |
| CN202018872U (en) | A voltage transformer and an iron core assembly thereof | |
| CN101471170A (en) | Amorphous alloy oil immersion type distribution transformer body structure and manufacturing method thereof | |
| CN206742029U (en) | A kind of R types discharge coil | |
| CN205900254U (en) | Two paper tinsels of formula of opening are around three -dimensional book dry -type transformer unshakable in one's determination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180112 Termination date: 20210331 |