mechanical endurance class m1 and m2

Please enter a valid email address Activated macrophages are usually divided into two categories, M1-like macrophages and M2-like macrophages. M1 = Currency with public + Demand deposits with the Banking system (savings account, current account). Electrical Engineer. They are continuously updated to reflect the actual status of the respective technologies. Applicants taking the motorcycle skills test should consider the size of the motorcycle they plan to operate. Search topic-related frequently asked questions to find answers you need. Circuit breaker has to undergo power frequency withstand test, in which power frequency voltage is applied to the circuit breaker for 1 min. Mechanical durability M1: Circuit-breaker with normal mechanical endurance as demonstrated by 2000 times operating sequence. It might only take a couple of days. June 25, 2022; 1 min read; advantages and disadvantages of stem and leaf plots; wane weather 15 closings and delays; Therefore, when the decision was made to revise IEC 694 this was largely to take into account items which had not been covered by standards, so far. These parameters are common for all high & extra high voltage class SF6 circuit breakers. Together with the extensive list of options and panel types Xiria Extendable Type is positioned front row for secondary switchgear applications up to 24kV. It is referred in kA peak, as it remain for very short time. endstream endobj 98 0 obj <>stream GEs F35 is also available SF6-free with g3-gas technology, see F35g. Nameplate details of SF6 Circuit Breaker | Explained, https://www.theelectricalguy.in/wp-content/uploads/2020/06/Nameplate-CB-1024x576.jpg, https://secure.gravatar.com/avatar/87a2d2e0182faacb2e003da0504ad293?s=96&d=mm&r=g, Nameplate details of Capacitive Voltage Transformer (CVT) | Explained, Vacuum Circuit Breaker Nameplate Details | Explained, https://www.theelectricalguy.in/wp-content/uploads/2020/07/Thumbnail-1-1024x576.jpg, Isolator/Disconnector Nameplate Details | Explained, https://www.theelectricalguy.in/wp-content/uploads/2020/07/DS-1024x576.jpg, Nameplate Details of Current Transformer | Explained, https://www.theelectricalguy.in/wp-content/uploads/2020/06/CT-1024x576.jpg. Whereas, normal voltage is the voltage which will remain in the system normally. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Knowledge test questions are based on information in this handbook and the California Driver Handbook. California issues the following DL classes for two-wheel vehicle operation: Class M1-You may operate any two-wheel motorcycle, motor-driven cycle, or motorized scooter and all vehicles listed under Class M2. M1 = coins and currency in circulation + checkable (demand) deposit + traveler's checks. Up to 3 bays are assembled together, wired, tested and shipped enabling shorter site works. Mechanical endurance M0 M1 M2 Electrical endurance E0 E1 E2 E3 Restrike probability C1 C2 C = Closing, O = Opening Class E1/E2*, M2, C2 M0 E2 Examples: MMS circuit-breaker MMS disconnector MMS earting device *) E2 if the CB is not for autoreclosing. mechanical endurance class m1 and m2 - hillsboro, ohio newspaper classifieds - hillsboro, ohio newspaper classifieds - The Norfolk and Western Railway's M, M1 and M2 classes were a series of 4-8-0 steam locomotives owned and operated by the Norfolk and Western Railway . Reach out to our customer care team to receive more information, technical support, assistance with complaints and more. And hence youll only find this parameter on the circuit breaker above 245kV level.It becomes important to test the breaker above 245kV voltage level for switching surges. Drive motor operating voltage . This second edition with title "Common specifications for high-voltage switchgear and controlgear" published in 1996 with reference IEC 60694, has, among others, additional chapters which deal with safety aspects of electrical, mechanical, thermal and operational nature. Ferenchick GS, Kirlin PC, Hamlin NJ (1988) Acute myocardial infarction in a 22-year-old world class weight lifter using anabolic steroids. The action you just performed triggered the security solution. This shows the total weight of SF6 gas in the breaker. Joint TheElectricalGuys mailing list, to get the email notification of new posts. Need plates? In my previous article, I explained about the standard IEC 62271-1 and its updates, which you can see here. In addition, the F35 is environmentally friendly and features an advanced SF6 sealing system. Overview [ edit] Initially designed as mainline freight power, 125 class M 4-8-0s were built between 1906 and 1907. If circuit breakers mechanical endurance class and electrical endurance class is different from M1 and E1, then it has to be on nameplate. To obtain your DL, refer to the Requirements for a Motorcycle M1 or M2 License section (see page 5). M1 and M2 money are the two mostly commonly used definitions of money. Release date. Z1n%veJvo 1o" For more details, please read our 28/05/2021), (DOC 650 KB, M1 is an estimate of cash and checking. Let me tell you what is mechanical endurance class and electrical endurance class. The content currently in English is the official and accurate source for the program information and services DMV provides. c),+H5P.)={qs!NZbo Back to back capacitor bank switching is a special application, and not all the breakers are intended for this. Xiria offers a high level of operational safety and is suitable for applications up to 24 kV. Parameters mentioned on the nameplate of circuit breaker are also in line with the IEC 62271-100. Practice here. The aggregates - MB, M1, and M2 - go up or down as their components are increased or reduced. Click to reveal origins and history of globalization epoch; objects of affection central idea. But it will allow, if this person converts it they will have the ability to write more checks. You can email the site owner to let them know you were blocked. Call Us Now : (714) 903-1155 Beginning May 2020, M2 consists of M1 plus (1) small-denomination time deposits (time deposits in amounts of less than $100,000) less IRA and Keogh balances at depository institutions; and (2) balances in retail MMFs less IRA and Keogh balances at MMFs. 28/05/2021), (PDF 2 MB, %PDF-1.6 % And of course, breaker has to withstand these voltages too. And M2 Pro crushes computeintensive tasks like editing massive images and 8K ProRes video. API 641 (Type Testing of Quarter-turn Valves for Fugitive Emissions, 1st Edition) was published in late 2016 and is applicable to ball, butterfly and plug type valves. ;;H J8p( / t +M;.&i'A6y}"/[*msrjJ0o%ehq!NpjH@'[AP]*HH;'n_[K4H8|df^Au)c|_9-/$)SQW{DJ[}` U[sA;.!=2,)nVUm. If it uses NVMe protocol (PCI-E), it will be much faster than SATA SSD. This is the highest amount of a single capacitor bank current a breaker is capable of breaking. These were the mandatory parameters as per IEC. Which remain in the system for a very short time and then the system goes back to normal. EUROLAB, yokhala ndi ma laboratories ovomerezeka apamwamba komanso gulu la akatswiri, imapereka ntchito zoyesa zolondola komanso zachangu mkati mwa kuyesa kwa GB/T 31484. IEC 62271-100. I'd like to receive news and commercial info from Schneider Electric and its affiliates via electronic communication means such as email, and I agree to the collection of information on the opening and clicks on these emails (using invisible pixels in the images), to measure performance of our communications and improve them. The DMV is unable to guarantee the accuracy of any translation provided by Google Translate and is therefore not liable for any inaccurate information or changes in the formatting of the pages resulting from the use of the translation application tool. of User(s): 1 - Company: CERN DSU-SI Order No. Please note, E2 class is applicable only for distribution circuit breaker below 52kV. Next in line, we have the Swift 5 (7:36), ZenBook 14X (7:39) and the XPS 13 Plus (8:17). The M2 Max MacBook was right behind at 4:06 and then the M1 MacBook with a time of 4:51. It can be 110V DC or 220V DC. V . ';f %^`FZyzoy7LU2tOG[9DWP.6!Vz!W!&o$I{L1Y={\^_5&'e7r q!R.I(!7T5ZT,3t_, '}I0"?h0$!#vpA0|c'@"x$f(TP7^3cPkR~?7mc3XJH@p.+d0"LRw{0F'%E9|`U2+=J>W!psa}rux|>&|)Y+2~n3{49r2T\/7z kZh|/ 8pe/8@QxZ-3b?F=6.! . But of course, some of these parameters may be skipped, if it is mutually agreed between manufacturer and customer. 2.2-4: A 20.8 m long wall bushing is required in order to connect DMVs licensing tests are designed to be scored objectively. * Motor vehicles with a 149 cc or less motor size do not have the engine capability to be safely driven on a freeway or expressway. S1 . What are the different rated values of mechanical endurance for disconnectors according to IEC 62271-102? Easily find the nearest Schneider Electric distributor in your location. It is the power frequency on which electricity is generated, transmitted and distributed. The Relationship between M1 and M2 Money. 190.102.41.145 So, on the nameplate youll find it is mentioned as 1.3 (or 1.5). This will vary manufacturer to manufacturer. Commonly used conductors today have a mechanical and electrical endurance in the range of 250,000 to 1,000,000 operating cycles. Two masses m1 and m2 (m1 > m2) are connected by massless flexible and inestensible string passed over massless and frictionless pulley. This is the highest amount of cable charging current a breaker is able to break. Detailed explanation, Series Circuits VS Parallel circuits | Easiest Explanation, Type designation and serial number Type of CB and its serial number, Year of manufacture year in which the breaker is manufactured, Relevant standard standard as per the breaker is manufactured, Rated peak withstand current or rated making current, Rated short duration power frequency withstand voltage (kV) & Rated lighting impulse withstand voltage (kVp), Rated switching impulse withstand voltage, Rated single capacitor bank breaking current, Rated back to back capacitor bank breaking current. On some nameplates, youll find that short circuit current is given as symmetrical and asymmetrical current. Switching class . Its theoretical data transfer speed is 600MB/s. For 145kV, rated voltage is 145kv and normal voltage is 132kV. Naturally, service and test experiences which had been gathered on the basis of the first edition reflected in the revision. None of these persons engage in endurance training which is commonly associated with physiological, i.e. When your chat is over, you can save the transcript. Seasonally adjusted M2 is constructed by summing savings deposits (before May 2020), small . DC component is a DC component of short circuit current. Gain actionable insights on installed equipment health to maximize uptime and boost performance. This current is called as short circuit making current. Videos The motorcycle skills test is conducted in either an actual traffic environment or in a controlled off-street area. M1 and M2 literally mean "first year of master" and "second year of master". - Short-duration power-frequency, phase-to-earth / across isolating distance, - Lightning impulse, phase-to-earth / across isolating distance, Bus-transfer current switching capability, Switching capability - electromagnetic coupling, Switching capability - electrostatic coupling, Smart grid features including full-digital monitoring, control and protection, One of the best experiences and high data reliability, One of the most compact GIS with bay footprint up to 45% below market average depending on kV rating, Up to 2 bays (145 kV), up to 3 bays (72.5 kV), and complete bays (170 kV) assembled, wired, tested and shipped, Isolating device for voltage transformer / surge arrester, Handle more power while reducing energy losses, A compact HV substation fits in the wind turbine. Each pole unit of the M2 delivers 100GB/s of unified memory bandwidth 50 percent more than M1 and can be configured with up to 24GB of fast unified memory. M2 = M1 + Savings deposits of post office savings banks. 60 . Please enter a valid email address, Problem with captcha verification, please check your connection. new eczema treatment 2022 australia . 99=(dpm8:W!8 t~3qAm;wOo{jf yPNSPqWDHOVcpv][}8[aDlMbT7w(Y:905vu ?'Rue=8gFp_[ f?3m%wcv3V0vyQ:= |:FYUv6"H~UEgGjs]FrEg7v_w)!Mni1d,U2{9pR. The DL 389 is valid for 12 months from the issue date. So, in this case, 420kV is the rated voltage and 400kV is normal voltage. For example, the number of test specimen became limited, the conditions for identification of the test object became more pronounced, and the criteria to pass the test were written in a more exact manner. Discover our digital tools to spend less time looking for answers and more time on your business. Apply for a license or ID card (including REAL ID). Renew, reinstate, or apply for a motor carrier permit. E1 stands for Electrical endurance. It looks like you are located in the United States, would you like to change your location? The all-new MacBook Air with the Apple M2 chip is the best option for most buyers today. Starting at $1,199, the notebook is also well-priced, given its power, speed, and battery endurance. PK ! %PDF-1.6 % 3 Classification of circuit-breakers 3.1 General IEC 62271-100 defines the following classes of circuit-breakers: Class E1 and E2 of electrical endurance are defined in 3.4.112 and 3.4.113 of IEC 62271-100:2008; Class C1 and C2 for capacitive current switching are defined in 3.4.114 and 3.4.115 of IEC 62271-100:2008; Class M1 and M2 of mechanical endurance are defined in 3.4.116 and 3.4.117 of IEC 62271-100:2008; Class S1 and S2 for specific system application are defined in 3.4.119 and 3.4.120 of IEC 62271-100:2008. jfXut061>0"St^@hiQ|Z"~.@.,Y>a=Czy9phQ The scope of maintenance be assessed generically as follows: M1 Aircraft built to CAR 522, 523, 523-VLA, 527, 549, and equivalent standards, but excluding turbojet aircraft. YUMPU automatically turns print PDFs into web optimized ePapers that Google loves. Therefore, the breaker must withstand this high current and the mechanical forces caused by this current. This application is restricted to circuit-breakers used for overhead lines. The used materials are shaped specifically to provide optimum insulation combined with excellent thermal characteristics. Now breaker will remain in open condition for 3 mins. What are M1 and M2? For more information, contact CMSP at 1-877-RIDE-411 or visit www.motorcyclesafetyca.com. 50kA. Performance & security by Cloudflare. Isolator rated for 72.5 kV and below shall be of extended mechanical endurance class - M1 as per IEC-62271-102. Xiria Metering Solutions offers flexibility. 22 TR 62271-306 IEC:2012(E) The experience with this standard on common specifications was very positive. Introducing a bold, new digital ecosystem and an open, global community of innovative problem solvers. This had, in particular, consequences for the rules for design and construction as well as tests which now, also, covered topics such as interlocking, position indication, degree of protection by enclosures and tightness. To locate a DMV field office that offers the motorcycle skills test and/or to schedule an appointment, visit www.dmv.ca.gov, Notice of Transfer and Release of Liability, Special Interest and Personalized License Plates Orders, New Trailer and Off-Highway Vehicle (OHV) Report of Sale, Vehicle & Occupational Licensing Industry News Memos, Vehicle Industry Services Resources & Links, Industry Business Center Case Status Request, Occupational Licensing Status Information System, The History of the Department of Motor Vehicles, Department of Motor Vehicles Strategic Plan: 2021-2026, Small Business and Disabled Veteran Business Enterprise Program, Department of Motor Vehicles Field Office Wait Times Reports, Department of Motor Vehicles Performance Reports, Privacy Policy Statement (Privacy/Security), install the Google Toolbar (opens in new window). This benefits small floor spaces. Certificates of Completion of Motorcycle Training, Complete a Driver License or Identification Card Application (DL44 or DL44C), Parent(s) or guardian(s) signature (if a minor), *Pass the applicable knowledge and skills tests, Have an instruction permit for at least 6 months. Grid Solutions is focused on addressing the challenges of the energy transition by enabling the safe and reliable Basic vehicle control skills are included in the motorcycle skills test to determine your ability to maneuver in normal traffic situations. Class M1 . Breaker has to undergo test for this also. Motor operation availability . Saamme toimimaan sen, mill on merkityst. It is generally 2.5 times the rated short circuit current. It is given as times the normal system voltage. D,l]-^/bF6F9#b. Fasteners conforming to the requirements of ISO 898 are used in applications ranging from 50 C to +150 C. Contact of one pole will open before the other two. Google Translate is a free third-party service, which is not controlled by the DMV. Note 4: The Class M1/M2 instruction permit includes the following restrictions: Motorcycle applicants under 21 years old are required to complete a CMSP training course before receiving a motorcycle instruction permit. After 0.3 sec, it will close and if the fault is cleared it will remain close. It has a fresh new design, a similar silhouette to the range-topping MacBook Pros, futureproof specs, and best-in-class performance and battery life. Within Xiria both the primary parts and the mechanisms are contained in a fully enclosed housing which protects the whole system against environmental influences. This is the rated pressure of the SF6 gas in the breaker. The Xiria product family is designed around Eatons proven vacuum interrupters, which require no maintenance and are certified for 30,000 operation cycles. Your IP: Mills CD, Ley K (2014) M1 and M2 macrophages: the . The DL 389 is valid for 12 months from the issue date. Home > HV/MV Equipment > Gas-Insulated Substations > GIS, GE's F35 GIS is a field-proven solution with high availability that meets the challenges of networks up to 170 kV for power generation, transmission, distribution, tertiary and heavy industry applications. fmoD90K?zb[fd3sfO[9]CfXxyD}+,s_Cfg~ The CMSP training course provides hands-on motorcycle knowledge and skill training for beginner and experienced riders. A new and important item that was introduced was electromagnetic compatibility (EMC). While switching back to back capacitor banks, inrush current is very high and hence there is a high possibility that the arc will restirke. Enquiries to Email: custserv@iec.ch - Tel. From rich presentations to immersive gaming, M2 flies through work and play. The difference is that, Symmetrical current is the AC component of short circuit current which is equal to rated short circuit current. Your IP: This is the DC voltage on which closing and tripping coil works. A model of it was first displayed at the 2014 Singapore Airshow. Xiria Block Type offers high operational safety and availability in an environmentally friendly and compact design. E2- Not required any maintainance during expected operating cycle (1-52 kV) Two types of mechanical endurance ratings are established : - Class M1 circuit-breakers require mechanical endurance of 2,000 CO cycles; - Class M2 circuit-breaker have an extended mechanical endurance of 10,000 CO cycles. Mechanical endurance: M2 class: M2 class: M2 class: Capacitive switching: C2 class: C2 class: C2 class: Disconnector and low-speed earthing switch ratings: Capacitive current switching: 0.1 A: 0.1 A: 0.1 A: Bus-transfer current switching capability: 1600/10 A / V: 2520/20 A / V: 1600/10 A / V: Mechanical endurance: M2 class: M2 class: M2 class . We empower all to make the most of their energy and resources, ensuring Life Is On everywhere, for everyone, at every moment. It is the best choice for power supply which provides safer power usage environment. 97 0 obj <>stream Like the M1, it combines CPU and GPU onto one die (one piece of silicon) with shared memory for dramatically faster performance than systems that separate CPU and GPU into discrete chips. This website is using a security service to protect itself from online attacks. extended mechanical endurance class - M2 as per IEC-62271-102. 5 5 5 Capacitive current class class C2 C2 C1 General information Insulator type Polymetric bushings If the breaker is used for synchronising two different system, it may happen that the breaker has to open when the systems are in synchronism procedure. M2 = M1 + savings deposits + money market funds + certificates of deposit + other time deposits. The DMV is unable to guarantee the accuracy of any translation provided by the third-party vendors and is therefore not liable for any inaccurate information or changes in the formatting of the content resulting from the use of the translation service. This is the highest amount of line charging current a circuit breaker is capable of breaking. Graphitic stem packing for API 624 certified valves must comply with API 622. Safe riding requires knowledge and skill. After 3 mins the breaker will close again, and if the fault is cleared it will remain close. A circuit-breaker class E1 has a basic electrical endurance, whereas a circuit-breaker of class E2 is designed such as not to require maintenance of the interrupting parts of the main circuit during its expected operating life. Eaton on lykkiden shknhallintaratkaisujen valmistaja, joka on sitoutunut parantamaan elmnlaatua ja suojelemaan ymprist kaikkialla maailmassa. Breaker with class C1 indicates, Low probability of restrike during breaking of capacitive currents. In other words, if a 1TB SSD is specified for 1 DWPD, it can withstand 1TB of data written to it every day for the warranty period. These parameters depends upon some specific condition, which is also given below. Mechanical endurance class M1 and M2 Two classes are defined: - Class M1, normal mechanical endurance, a circuit-breaker mechanically type tested for 2 000 operations; - Class M2, extended mechanical endurance, a circuit-breaker mechanically type tested for 10 000 operations). Welcome the the Schneider Electric French website. Technical Specification Disconnecting Circuit Breakers Specification identification: DCB 72,5 - 800 kV Create date: 2015-10-23 2(20) Technical Specification for Disconnecting Circuit Breakers between 72.5 - 800 kV Based on International Electrotechnical Commission (IEC) TABLE OF CONTENT 1Disconnecting circuit breakers3 1.1Scope3 The different classes and their specific applications are discussed in detail in this subclause. A two- or three-wheeled device, capable of no more than 30 mph on level ground, and equipped with fully operative pedals for human propulsion or having no pedals if powered solely by electrical energy, a motor producing less than four gross brake horsepower, and an automatic transmission. cm. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Faster Power-Efficient Performance The new CPU features faster performance cores paired with a larger cache, while the efficiency cores have been significantly enhanced for even greater performance gains. What is a Gas Insulated Switchgear (GIS)? E0 weights would only be used as a master . Following are some of the standard values of rated normal current-. Are you sure you want to delete your template? M2 = M1 + marketable securities + other less liquid bank deposits M3 = M2 + money market funds M4 = M3 + least liquid assets These measures of money supply usually vary depending on the country. Or it is also called as rated peak withstand current. V!4|&qk/viY0=Q"xxCo_z->%)lKr[@*E~xy)afxDkK|"vqq5K:e9T03D[5%PKJ8N$tJ#T*-pT27|j2E5w1k As the name suggest, these parameters are mandatory. Mechanical properties - Steel Screws and Bolts ISO 898-1 EN 20898-1. You have already flagged this document.Thank you, for helping us keep this platform clean.The editors will have a look at it as soon as possible. Kaikki oikeudet pidtetn. Electrical endurance 274 (Class E2) Mechanical endurance 10,000 (Class M2) Rated operating sequency/duty: O-.3s-CO-3min-CO Rated closing time ms: 60 Rated opening time ms 50 Rated breaking time ms 60 Standard trip/close supply Vdc 30/110 Standard motor charging supply Vdc (Vac) 30/110 (240Vac) An M.2 SSD can support AHCI or NVMe protocol. And hence, breaker shall withstand power frequency voltage caused by these reasons. M2: Circuit-breaker for special service require-ments and designed so as to require only limited maintenance as demonstrated by 10,000 times operating sequence. But, if the fault is still there then the breaker will open immediately. An observation road test is required for applicants who have never been licensed for any class of motor vehicle and apply for a motorcycle only license.Note 1: Minors 15 years old or older, but under 17 years old, must submit a DL 389, bring proof of completion of both driver education and driver training or have a Class C driver license, and pass both the driver knowledge and the motorcycle driver knowledge test.Note 2: Applicants 18 years old or older, but under 21 years old, must submit a DL 389, and pass both the driver knowledge and the motorcycle driver knowledge test.Note 3: While not a requirement, motorcycle license applicants 21 years old or older, are encouraged to enroll in the California Motorcyclist Safety Program (CMSP) training course. In this tutorial, well look at the all these parameters mentioned on nameplate of SF6 circuit breaker. Whereas, C2 class breaker indicates, very low probability of restrike during breaking of capacitive currents. 14/06/2021). and industries worldwide with equipment, systems and services to bring power reliably and efficiently from the point of generation to Search for a solution on your own, or connect with one of our experts. A whole F35-72,5 kV gas-insulated substation fits into the most advanced and powerful wind turbine towers, enabling them to handle more power while reducing energy losses. Money Stock M2. Logical mechanical and electrical interlocks prevent mal operation Highly flexible Complete range of panel types, including extendable Multiple configurations Low total cost of ownership Maintenance free vacuum circuit-breaker and load-break switch Primary parts and mechanism installed in a fully sealed for life enclosed housing Lets see that. Condition : Applicable only for circuit breakers including & above 72.5kV. Mechanical endurance class class M2 M2 M2 Number of mechanical operations ops. The acceleration of centre of mass is Class 11 >> Physics >> Systems of Particles and Rotational Motion >> Motion of Centre of Mass and Problems on it >> Two masses m1 and m2 (m1 > m2) are conne Question You will receive your welcome message soon. Related Interests Electrical Equipment Components Equipment Power (Physics) Electromagnetism To provide a foundation for the complexity of in vivo macrophage phenotypes, we performed . Switching of capacitive and inductive current is a bit difficult task for the breaker. As per IEC 62271-1 there are two alternatives for operating sequence,O t CO t COCO t CO, where,O = Opening operationC = closing operationt,t,t = time intervals between successive operations. Lighting impulse voltage is generally generated due to lighting strokes. IEC 62271-310 proposes a unified test procedure for this class E2. M with condition L (includes M1 and M2-L): for mopeds and motorized scooters (also called "limited-speed" motorcycles). What's the monetary base? The motorcycle skills test includes the following: Pre-trip Inspection You will be asked to identify the following items on your motorcycle: You will be asked to demonstrate the following skills: When interacting with the Department of Motor Vehicles (DMV) Virtual Assistant, please do not include any personal information. This type of current is generated because of the switching of loaded or unloaded overhead lines. The monetary base (MB), for example, varies as the Federal Reserve buys or sells certain assets, such as Treasury securities, while MI varies as loans by depository .