... (IEV) IEC 781: 1989, Application guide for calculation of short- circuit currents in low-voltage radial systems IEC 909: 1988, Short- circuit current calculation in three-phase a.c systems SECTION ... different return circuits are: a: return circuit by fourth conductor, b: return circuit by fourth conductor and sheath; c: return circuit by fourth conductor and earth (100 Zzm); d: return circuit by ... différents circuits de retour sont: ``,,,,,``,````,``,,,,`,```,``-`-`,,`,,`,`,,` - a: circuit de retour par un quatrième conducteur, b: circuit de retour par un quatrième conducteur et la gaine; c: circuit...
Ngày tải lên: 04/04/2014, 11:57
... U0 6cm x 6cm, short – circuit current IK < 0,32A) 2,4V MỤC ĐÍCH Khảo sát đặc tính kỹ thuật cấu tạo pin quang điện (Solar battery Cells Voltage U0 2,4V 6cm x 6cm, short – circuit current IK < 0,32A) ... battery Cells Voltage U0 2,4V 6cm x 6cm, short – circuit current IK < 0,32A) 3.1 Cấu tạo pin quang điện Solar battery Cells Voltage U0 6cm, short – circuit current IK < 0,32A) 2,4V 6cm x Pin đƣợc ... tạo pin đặc tính kỹ thuật pin quang điện (Solar battery Cells Voltage U0 2,4V 6cm x 6cm, short – circuit current IK < 0,32A) GVHD: Ths.Lê Văn Nhạn SVTH: Nguyễn Thị Ngọc Huyền Luận văn tốt nghiệp...
Ngày tải lên: 22/12/2015, 11:47
IEC 60909 3 short circuit currents in three phase a c systems currents during two separate sim
... ``,,,,,``,````,``,,,,`,```,``-`-`,,`,,`,`,,` - 5.1.2 Peak short- circuit current, symmetrical short- circuit breaking current and steady-state short- circuit current The peak short- circuit current is calculated according ... Initial line-to-earth short- circuit current " I kEE Initial short- circuit current in the case of two separate simultaneous line-toearth short circuits " I kE2E Initial short- circuit current flowing ... Short- circuit breaking current in the case of two separate simultanious line-toearth short circuits I Etot Total earth current at the short- circuit location I ETn Earth current at the short- circuited...
Ngày tải lên: 04/04/2014, 11:58
báo cáo khoa học: "Electrical short-circuit in b-cells from a patient with non-insulinoma pancreatogenous hypoglycemic syndrome (NIPHS): a case report" pps
... 1974, 10:431-438 doi:10.1186/1752-1947-4-315 Cite this article as: Bränström et al.: Electrical short- circuit in bβ-cells from a patient with non-insulinoma pancreatogenous hypoglycemic syndrome ... inside-out patches (Figure 3b), diazoxide was also able to reverse the blocking effect of ATP The mean current decreased to 2.7 ± 1.2 pA in the presence of 100 μmol/L ATP, compared with 20 ± pA before ... the continued presence of 100 μmol/L ATP, an addition of 325 μmol/L diazoxide increased the mean current to 7.8 ± 2.7 pA (P < 0.05) At the eight-month follow-up, the patient had neither hypoglycemia...
Ngày tải lên: 11/08/2014, 02:21
TÀI LIỆU HAY VỀ TÍNH TOÁN PHÂN TÍCH HỆ THỐNG ĐIỆN (Power system analysis short circuit load flow and harmonics)
... Generators Short- Circuit Current of a Rectifier Short- Circuit of a Charged Capacitor Total Short- Circuit Current DC Circuit Breakers Load Flow Over Power Transmission Lines 10.1 Power in AC Circuits ... synchronism Short- circuits can be studied from the following angles: Calculation of short- circuit currents Interruption of short- circuit currents and rating structure of switching devices Effects of short- circuit ... switching devices Effects of short- circuit currents Limitation of short- circuit currents, i.e., with current- limiting fuses and fault current limiters Short- circuit withstand ratings of electrical...
Ngày tải lên: 21/08/2014, 12:41
transformer substaions theory and examples of short circuit calculations
... reactance, direct axis Sk short- circuit apparent power Ik short- circuit current ip peak current Zk short- circuit impedance Xk short- circuit reactance Rk short- circuit resistance Z… impedance ... 3.95x10-3) Calculation of the short- circuit current Determination of the short- circuit resistance and reactance values of the main elements of a circuit allow the short- circuit currents of the installation ... peak value of the prospective short- circuit current MV/LV transformer substations: theory and examples of short- circuit calculation 15 Calculation of short- circuit currents Since each element with...
Ngày tải lên: 01/11/2015, 08:43
Giao trinh bai tap power system analysis short circuit load flow and harmonics
Ngày tải lên: 09/12/2016, 07:12
4 short circuit modeling
... permission 10-9 Type WTG Short Circuit Current 3-ph Fault to 20% Voltage • Initial transient current – ~ p.u symmetrical • Current regulator quickly takes control • Current order increased for ... dc decrement – WTG short- circuit contribution may not have current zeroes until a number of cycles following a three-phase terminal fault – Fault resistance and grid short- circuit contribution ... induced current – Chopper on dc bus – Shorting device on rotor circuit – Bypass through converter bridge • Results in highly discontinuous fault behavior – Substantial complication of short- circuit...
Ngày tải lên: 19/12/2016, 12:53
Input Output short notes
... the additional outputs manufacturing and nonmanufacturing must produce in order to have one more unit of nonmanufacturing output available for sale to final demand They are called output multipliers ... The first column of this table gives the output multipliers for sector 1, the second column gives the output multipliers for sector and the third gives the output multipliers for a direct payment ... (1-a11)(1-a22)-a12a21 The first column of this table gives the output multipliers for sector and the second column gives the output multipliers for sector Thus the direct + indirect effect on...
Ngày tải lên: 17/12/2017, 22:38
IEC 62271 100 high voltage switchgear and controlgear high voltage alternating current circuit
... 6.103 Test circuits for short- circuit making and breaking tests .197 6.104 Short- circuit test quantities .199 6.105 Short- circuit test procedure 225 6.106 Basic short- circuit ... value of breaking current, less than rated short- circuit breaking current, at which the arcing time is a maximum and is significantly longer than at the rated short- circuit breaking current It will ... either side of the circuit- breaker 3.7.119 short- circuit making capacity [IEV 441-17-10] 3.7.120 short- circuit breaking capacity [IEV 441-17-11] 3.7.121 short- time withstand current [IEV 441-17-17]...
Ngày tải lên: 04/04/2014, 12:34
Lightning return stroke current from a new distributed circuit model and electromagnetic fields generated by tortuous lightning channels
... Return Stroke Current 63 Table 4.2 Circuit Element Values for 30 kA Return Stroke Current 64 Table 4.3 Circuit Element Values for 80 kA Return Stroke Current 65 Table 5.1 Lightning Current Measured ... stroke current in the DU model 31 Chapter Lightning Return Stroke Models The current waveform is similar to a measured lightning return stroke current The peak current is 30 kA and the maximum current ... Circuit 4.2 40 41 4.2.2 Derivation of Equations Defining Return Stroke Current 44 4.2.3 Profile of Circuit Elements 4.3 EVALUATION OF PROPOSED MODEL 56 58 CHAPTER APPLICATION OF DISTRIBUTED CIRCUIT...
Ngày tải lên: 12/09/2015, 08:19
A LTPS TFT pixel circuit for active matrix organic light emitting diode based on improved current mirror
... circuit takes the advantage of current compensation and avoids the disadvantage of using constant current sources The improved current mirror can make the input voltage (VDD) and the output current ... typical mirrored current programmed pixel circuit( CPPC) is shown in Fig 1(b)[7] In this work, an improved current mirror pixel circuit is proposed which uses voltage driving and provides current compensation ... conventional 2T1C pixel circuit; (b)the typical mirrored current programmed pixel circuit (CPPC) Fig.2 (a)Equivalent circuit of the proposed driving scheme; (b)signal timing diagram Fig.3 (a )Output characteristics...
Ngày tải lên: 10/03/2017, 19:34
Thực hành với Circuit Maker
... Thực hành với Circuit Maker 1.3 Bắt đầu mô mạch số Để chọn chế độ mô mạch số ta làm sau: chọn menu Simulation|Digital ... số Những công cụ khác chọn chế độ mô tương tự Công cụ mô số GVHD: Vũ Thị Ngọc Quý Thực hành với Circuit Maker Bài 2: Mạch đa hợp giải đa hợp 2.1 Mạch dồn kênh sang A, Bảng hoạt động Ngõ vào chọn ... 2DT-K7 U2A U3A U2B L1 U4A U2C U3B U2D 2.2 Mạch tách kênh sang GVHD: Vũ Thị Ngọc Quý Thực hành với Circuit Maker A, Bảng hoạt động Ngõ vào chọn S A B ngõ 0 Y0 Y1 Y2 1 Y3 Từ bảng thật, dùng phương...
Ngày tải lên: 09/10/2012, 09:19
Circuit theory of finance and the role of incentives in financial sector reform
... pay out their short- term debt with the banking system The circuit may start anew with new short- term bank credit extended to capital good producers for new production In fact, the circuit may start ... integral nature of the circuit is such that misbehavior from agents upstream in the circuit may disturb the circuit functioning downhill he process Also, in a repeated-game context, circuit closure ... investment in a circuit framework Over the last twenty-five years, the link has been studied more systematically by monetary circuit theory1, which analyzes the properties of the circuit process...
Ngày tải lên: 24/10/2012, 09:33
Fundamentals of RF Circuit Design With Low Noise Oscillators
... h21 (short circuit current gain) when placed directly in a common emitter circuit is fβ = fT/hfe Therefore fβ = 50MHz As: CR = then 2π f β (1.24) CR = 3.18 × 10−9 As h21 is the short circuit current ... and a controlled current source If a base current, ib, is applied to the base of the device a collector current of βib flows through the collector current source The emitter current, IE, is therefore ... is now shown as (β+1)re and the output current source remains the same Another format for the π model could represent the current source as a voltage controlled current source of value gmV1 The...
Ngày tải lên: 08/04/2013, 10:50
bài giảng-vhdl - Very High speed integrated circuit Description Language
... Kế Hệ Thống Số Phần VHDL L1: if N = generate OUTPUT
Ngày tải lên: 12/09/2013, 22:38
Allen and Holberg - CMOS Analog Circuit Design
... design specifications Allen and Holberg - CMOS Analog Circuit Design Page I.2-4 COMPARISON OF ANALOG AND DIGITAL CIRCUITS Analog Circuits Digital Circuits are discontinuous in Signals are continuous ... are adjustable 1992 ? Digitally assisted analog circuits ? Allen and Holberg - CMOS Analog Circuit Design Page I.2-2 DISCRETE VS INTEGRATED ANALOG CIRCUIT DESIGN Activity/Item Discrete Integrated ... approach • Sub-blocks → Blocks → Circuits → Systems Examples to illustrate the concepts Allen and Holberg - CMOS Analog Circuit Design Page I.2-1 I.2 ANALOG INTEGRATED CIRCUIT DESIGN ANALOG DESIGN...
Ngày tải lên: 18/10/2013, 12:15
LoopStar® 700 Circuit Emulation Technology Extends TDM Services Over Packet Networks
... devices Ethernet / IP Network Circuits In (T1, E1, J1) LS 700 Transmit Packets Circuits Out (T1, E1, J1) Receive Packets LS 700 The LoopStar 700 delivers carrier-quality TDM circuits over a packet network ... provisioning end-to-end services To provision a T1 circuit, for example, an operator simply specifies the destination IP address and port of the circuit Unlike TDM systems, there are no intermediate ... highest priority to circuit emulation traffic Even if the packet transport network delivers disappointing performance, the LoopStar 700 continues to deliver no compromise circuit emulation service...
Ngày tải lên: 18/10/2013, 19:15
Cổng mạch (Circuit Gateways)
... tương ứng bị huỷ khỏi bảng mạch đóng lại ATMMT - TNNQ 30 Cổng mạch (Circuit Gateways) Cấu trúc ATMMT - TNNQ 31 Cổng mạch (Circuit Gateways) Cấu trúc Trong thực tế, tổ chức thường phân tách mạng ... 3 Cổng mạch (Circuit Gateways) Cấu trúc Đối tượng cổng mạch chuyển tiếp kết nối TCP host nội host bên ngồi Do ... port host nội thị cho gateway thực thi kết nối host ngoại vi host nội ATMMT - TNNQ 32 Cổng mạch (Circuit Gateways) Cấu trúc Do đó, gói tin độc hại vào mạng nội qua kênh thiết lập sẵn Vì vậy, cổng...
Ngày tải lên: 19/10/2013, 03:20
How To Make Printed Circuit Boards
... boards for testing circuit i deas Parts are simply plugged into one of these boards with no permanent connections, such as soldering The circuit is powered up for testing and circuit changes are ... Printed Circuit Prototypes" Comprehensive Datak Instructions for Printed Circuit Prototyping (Making Positive Artwork continued.) Draw the layout on graph paper before committing material to circuit ... Comprehensive Datak Instructions for Printed Circuit Prototyping Before you use the solderi ng iron Methods continued from page one.) "Breadboarding" a circuit is a term from our grandfather's days...
Ngày tải lên: 19/10/2013, 10:15