ハートの国のアリス～Wonderful Wonder World

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LT3070 Linear Regulator Has Low Dropout Voltage

The LT3070 is a digitally programmable Linear regulator said to have the lowest dropout voltage, lowest noise and fastest transient response of any monolithic 5A LDO currently available. Dropout voltage at 5A is 85mV and output voltage noise at 5A is 25uVRMS over a 10 to 100kHz bandwidth. The LT3070's 1MHz unity-gain bandwidth, coupled with its minimum 15uF ceramic output capacitance, provides 30mV of overshoot/undershoot in response to a 4.5A output load step, saving bulk capacitance, space and cost.

It is suitable for efficiently powering low-voltage, high-current devices such as FPGAs, DSPs, ASICs, microprocessors, sensitive communication supplies, server/storage devices and post-buck regulation applications. The LT3070's output voltage is digitally programmable from 0.8 to 1.8V in 50mV increments. Accuracy is tightly specified at +/-1 per cent over line, load and temperature. A digital margining feature can adjust system output voltage in increments of +/-1, +/-3 or +/-5 per cent, said to be advantageous during a system development debug.

A Powergood flag indicates if output voltage is in regulation or the device is in UVLO and the flag also provides an early warning indication of a thermal fault. The LT3070's input supply-voltage range is 0.95 to 3.0V and its bias supply voltage ranges from 2.2 to 3.6V. The bias supply provides gate drive to the internal NMOS pass device. Multiple LT3070 devices can be easily paralleled for higher output current and to spread heat across a PCB.

A tracking feature can control a buck regulator powering the LT3070's input. This tracking function drives the upstream buck regulator to maintain the LT3070's input voltage at VOUT + 300mV, minimising power dissipation. If output voltage is dynamically changed, the tracking function automatically adjusts the output voltage of the buck regulator to maintain efficiency. Internal protection circuitry includes UVLO, reverse-current protection, precision current limiting with power foldback and thermal shutdown with hysteresis. The LT3070 is offered in a thermally enhanced, low-profile (0.75mm) 28-lead 4 x 5mm QFN package and both E and I grades operate from -40 to 125C junction temperature range.

Voltage-Controlled Oscillator Is RoHS Compliant

Z-Communications has announced an RoHS-compliant Voltage-Controlled Oscillator (VCO), model ZRO2407A1LF in S-band. The ZRO2407A1LF operates at 2,400-2,415MHz with a tuning-voltage range of 0.5-4.5V DC. This VCO features a typical phase noise of -115dBc/Hz at 10KHz offset and a typical tuning sensitivity of 14MHz/V.

It is designed to deliver a typical output power of 3dBm at 5V DC supply, while drawing 21mA (typical) over a temperature range of -40 to 85C. This VCO features typical second harmonic suppression of -18dBc and comes in Z-Comm's standard MINI-16-SM package, measuring 0.5 x 0.5 x 0.22in.

It is available in tape and reel packaging for production requirements. The ZRO2407A1LF is also suitable for automated surface-mount assembly and reflow, as well as fixed-wireless and digital-radio applications that require ultra-low phase-noise performance.

IVT Monitors Current And Voltage In Electric Cars

Isabellenhuette Heusler has introduced a sensor module (IVT) that measures current and voltage during lithium-ion battery charging and discharging periods. It can be configured according to customer requirements. It is suitable for use in hybrid and electric vehicles.

The IVT (shunt measures 20 x 85mm, board measures 20 x 40mm) can perform measurements within a current range of +/- 1,500A at a resolution of 50mA. The sensor module records voltage within a range of +/- 20V at a resolution of 1mV. Measurements are taken via a 100-u-ohm-shunt and measured values are logged by the four-channel 16-bit data-acquisition system ISA-ASIC. For this pre-calibrated sensor module, customer calibration is no longer necessary. Both supply voltage and SPI signal are electrically isolated.

Safety Brake Rectifier Emits Constant DC Voltage

The Roba-multiswitch, developed for switching safety brakes quickly, is capable of emitting a constantly controlled DC voltage, independent of the mains voltage. This means that complex adaptation of magnetic coils to varying input voltages becomes unnecessary. Overexcitation on switch-on ensures that the connected brakes release extremely quickly.

Two designs are sufficient to cover all mains voltages worldwide, from 100 to 250V AC or 200 to 500V AC, and mains frequencies of 50 to 60Hz. The Roba-multiswitch for the mains voltage range from 200 up to 500V AC is conceived for the operation of safety brakes with 104V DC coils. The constant output voltage is produced using phase segment control. When switched on, the device temporarily (0 to 50ms) emits a bridge voltage, equalling 90 per cent of the applied mains voltage, rectified to the magnetic coil.

After this very short phase, a controlled overexcitation voltage of 180V DC is applied. The overexcitation time - up to the switchover to the operating voltage of 104V DC - can be selected via DIP switch to the levels 0.15s, 0.45s, 1s, 1.5s and 2s. The Roba-multiswitch for mains voltages of 100 to 250V AC works using a controlled overexcitation voltage of 90V DC. The selectable overexcitation times remain the same. The operating voltage (coil nominal voltage) is 52V DC.

Seaward Unveils High-Voltage Test Range

Seaward Electronic has announced a range of high-voltage test equipment. The range is designed for the safe and practical detection of voltages on electrical systems in the power generation and distribution, rail network, petrochemical, and electrical service and maintenance industries. The high-voltage safety testing equipment available includes neon and digital voltage indicators, safe discharge units, neon and digital phasing equipment, insulator leakage detectors and current clamps.

The KDIE high-voltage indicators include neon and digital systems to confirm the presence of voltage on earthed neutral electrical circuits up to 33kV. These are supported by a range of high-voltage phasing rods that enable phase comparisons to be made at the point of paralleling two circuits, without the interposition of voltage transformers or secondary wiring circuits. A neon-type instrument is available for use on circuits up to 11.5kV, and digital versions are available for use on systems of up to 15kV and 33kV.

The range of HV indicators and phasing units is supported by a hook ammeter for accurately measuring current flow on overhead power lines, and a large jaw clamp meter for the measurement of current flow through large conductors. In addition to the standard range of test equipment, specialist testers are available for the safe discharge of stored energy in large capacitors and electrically charged equipment. A dedicated airfield ground lighting voltage detector has also been introduced, for proving dead-on AGL systems up to 5kV.

All high-voltage test and measurement equipment in the Seaward range complies with international safety standards and is manufactured in accordance with IEC 61243. As well as specialist carrying cases, a range of accessories is available in support of the main high-voltage test instruments. These comprise proving units, battery chargers, overhead line extensions and bend-end adaptors for specialist switchgear locations.

SymCom MotorSaver Model 202 3-Phase Voltage Monitors

SymCom MotorSaver Model 202 is an auto-ranging voltage monitor designed to protect three-phase motors regardless of size. It is used on 190-480 VAC, 50 to 60 Hz motors to prevent damage caused by single phasing, low voltage, high voltage, phase reversal, or voltage unbalance. A unique microcontroller-based voltage and phase sensing circuit constantly monitors the three phase voltages to detect harmful power line conditions.

When a harmful condition is detected, the MotorSaver's output relay is deactivated after a trip delay. The output relay reactivates after power line conditions return to an acceptable level for the selected amount of time (Restart Delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

Note: To obtain UL listing for the MS202, use insulated 1/4" UL recognized female quick connects.

Features:

• Compact design saves precious panel space.
• 0.25" hole allows easy OEM mounting.
• Diagnostic bicolor LED indicator light is green in normal conditions, red during trip conditions, blinking green while in restart delay mode and blinking red when reverse phased.
• Universal range from 190-480 VAC 50/60 Hz provides the versatility needed to handle global applications.
• Transient protected to meet IEC 1000-4-5,±4kv.
• Detects single phase conditions regardless of regenerated voltages.

Protects 3-Phase motors from:

• Loss of any phase (single phasing)
• High and low voltage
• Voltage unbalance
• Phase reversal

Standard Features:

• UL and cUL recognized
• 5 year warranty
• Made in USA
• Manual, 2-300 sec. variable restart delay
• Mounts on panel surface

Terminal Blocks - Entrelec By ABB Low Voltage

For over 50 years, Entrelec® By ABB Low Voltage has been one of the leading manufacturers of terminal blocks, with products in use all over the world. All terminal blocks are manufactured using only the highest quality materials and carry UL, CSA, VDE, IEC and other worldwide approvals. Entrelec® by ABB offers space savings, industry standard DIN rail mountable terminal blocks and a variety of colors, functions and connection technologies that customers demand.

Product Offering

• Accessories
• Mini Terminal Blocks
• AMS 500 Marking Systems
• PCB Connection Devices
• ATEX Terminal Blocks
• PLC Wiring System
• Blocks for 5.08mm Connections
• Power Terminal Blocks
• Cable Management System
• Screw Clamp Terminal Blocks
• Distribution Terminal Blocks
• Specific Terminal Blocks
• IDC (ADO) Terminal Blocks
• Spring Clamp Terminal Blocks
• Test Connectors

The industry’s most identifiable termination technologies are:

• Screw Clamp technology remains the most popular in connection devices.
• Spring Clamp technology is a fast growing standard in screw-less connection.
• IDC (insulation displacement connection) technology is the newest, fastest, and most innovative of screw-less connections.

In addition to general purpose terminal blocks, Entrelec® by ABB offers definite purpose products such as Distribution, 5.08mm connection, Power, Mini, ATEX , and Railway terminal blocks to satisfy the specialty needs of their customers. Terminal Blocks entrelec® by ABB's dedication to its customers is proven by offering FREE software to assist in rail design and operating a 24 hour hotline for orders.

Markets and applications include:

• Process Control
• Large and small panel building
• Machine Tool
• Energy/Utility
• Railway/Transport
• Chemical/Petrochemical
• HVAC
• Ship Building
• Building Automation
• Instrumentation
• Utilities
• Automobile

Motortronics VMX Series Low Voltage Soft Starters

Flexibility of Control, Multiple ramp profiles, Pump-FlexTM Decel, process control timers and advanced motor protection make Motortronics VMX Series Soft Starter adaptable to a wide variety of AC motor applications, no need for add-on modules or costly auxiliary devices.

Compact packaging has become critical in more and more electrical installations. The VMX Series meets this need without compromising features and ratings. By using a highly engineered packaging design and the latest generation microprocessor, all the control and protection features you need are in the VMX Series. Narrow and shallow dimensions are perfect for integrating the VMX Series into motor control centers (MCCs), pump control panels, and retrofit starter enclosures.

Integral Bypass Contactors are standard on all sizes and provide maximum efficiency of panel space while maintaining the Motortronics reputation for being able to soft start most any load. The VMX Series is the only fully integrated, compact, world-class design offering uncompromised power and control capabilities.

Power Components 6 SCRs in inverse parallel pairs for full phase angle soft start control 1600V PIV rating on all units RC snubber for dv/dt protection of each SCR pair	Jog Dry contact closure selects a non-ramping Jog function at an adjustable torque
Line Voltage Range 200 to 600 VAC, 3 phase +10% -15% on all units, 50/60Hz	Kick Start 10 - 100% starting torque for 0.1 - 2 seconds
Current Ratings 18 - 1250A depending on unit selection Range of each unit is 50-100% of maximum	Pump-Flex™ Deceleration Ramp Fully adjustable to match field conditions: Begin Decel setting, 0 - 100% of line voltage Decel ramp time, 1 - 60 seconds End Decel setting (Off ), 0 - 1% of Begin setting
AC Supply Voltage User supplied 120VAC +10% -15% tolerance, 60Hz Optional 240VAC 50Hz control available	Restart Delay Timer (Sequential Start Delay) Programmable time delay 1 - 999 seconds after loss of control power for staggered restarts
Overload Capacity (% of motor FLA) Standard Duty: 350% for 30 seconds, 1.0 SF Heavy Duty: 500% for 30 seconds, 1.15 SF	Time Clock Controller 24 hour/7 day time clock to provide automatic start Up to 7 start events per day Select operation from 1 through 7 days per week Run time determined by process control timer
Bypass Contactor Standard on all units Standard Duty: Shunt rated bypass Heavy Duty (Across-the-Line) line start rated bypass	Process Control Timer (choice of either) Minimum Run (Batch) Timer 1- 999 minutes Runs until time expires, resets only if expired Resumes and finishes if stopped or power is lost Permissive Run Timer 1- 999 minutes Only allows operation during active run time
Start/Stop Control Choices 2-wire Run-Stop using dry contacts 3-wire Start/Stop with built-in seal in contact N.C. Interlock input (dry contact) for remote devices	RS-485 Serial Communications Up to 247 starters per link Modbus RTU protocol built-in Full programming over the serial link Programmable remote starter control
Ramp Control Choices (4 built-in) Voltage Ramp Voltage Ramp with Current Limit CLT© Closed Loop Torque Ramp (Current Ramp) Current Step (current limit only) Ramp times adjustable 1 - 120 seconds Current Limit adjustable 200 - 600% of FLA	Operator Interface Tactile feedback keypad Easy to read LED display Run and fault status indicators
Dual Ramps Select via dry contact closure between any combinations of the above	Electronic Shear Pin Protection Trip level: 100 - 300% of motor FLA with trip delay
Start & Run Protection Two programmable overload trip curves allow for the thermal capacity required to start the load while providing motor overload protection needed during the run time. Start: Programmable for Class 5 - 30 Run: Programmable for Class 5 - 30, enabled when starter detects motor is "At-Speed" Reset: Manual or automatic, selectable via programming. Remote reset available.	Motor Duty Cycle Protection Back-spin/coast-down, starts-per-hour or minimum time between starts lockouts. Restart delay after a power failure.
Real-Time Thermal Modeling Continuously calculates motor operating temperature even when the motor is not running.	Short Circuit Trips at 10x unit current rating during run. Checks for shorted load prior to each start.
Retentive Thermal Memory Remembers the thermal condition of the motor even in the event of a power brown-out or black-out when power is restored. Extrapolates motor temperature using a real-time clock.	Shorted SCR Locks out on any single shorted SCR (defeatable) or can provide shunt trip function if multiple SCRs short or bypass contactor is welded closed.
Dynamic Reset Capacity Overload will not reset until thermal capacity in the motor is sufficient for a successful restart. Starter learns and retains this information from previous starts.	Metering Monitors phase current, ground current and motor thermal capacity.
Motor Temperature PTC thermistor input can also be used for E-stop or external overload relay.	Phase Loss Trips on phase current or voltage loss
Equipment Ground Fault Residual current method with adjustable trip delay.	Phase Rotation Phase rotation trip can be set to A-B-C, A-C-B or disabled.

Sola Hevi/Duty Constant Voltage Transformers

Sola/Hevi-Duty offers a broad range of transformers to meet many applications. These dry-type transformers are offered encapsulated, ventilated or non-ventilated, 600 Volt Class, isolation type, single and three phase, through 500 kVA. Indoor and outdoor models are available.

General Purpose Transformers can be located close to the load. No vaults are required for installation and no long, expensive feeder lines are needed. Common applications include inductive and resistive loads such as motors, lighting and heating. Hevi-Duty general purpose transformers are manufactured to meet applicable industry standards, are listed in accordance with UL 506 and UL 1561 specifications and are classified as isolation transformers. The family of transformers includes:

• Distribution Transformers
  
• General Purpose


• Low Temperature Rise


• K-Factor


• Copper Wound


• Automation Transformers
  
  
  
  • General Purpose
  
  
  • Hazardous Location
  
  
  • Buck-Boost
  
  
  • Drive Isolation
  
  
  • Industrial Control

ABB Installation Contactors

ABB Low Voltage Installation Contactors are designed according to international standards (IEC), European standards (EN) and French standards (NF CUTE, DIN-VDE, BS).

We consider 2 types of "Installation Contactors" for different applications : "Normal " Installation and "Day-Night" Installation. They are essentially used in automated building equipment, industry and offices for terminal circuit controlling less than 40 kW AC-1 (incandescent lamps, fluorescent lamps, convectors heating, batteries, regulation systems, ovens, drying systems), small motors controlling less than 15 kW AC-3 (ventilation, air conditioning, pumping, watering, automatic systems) and unbalasting systems in energy management (possibly enslavement from clocks, unballasting relays, telebreakers, thermostats).

Mounting

• Mounting on rail DIN 35 mm (EN 50022) for switchboard.
• Mounting depth: 58 mm
• Width included from 1 to 3 modules (1 module = 17.5 mm)
• The magnetic circuit design ensures a completely silent operation, the coil is supplied by AC (type ESB 20) or by an integrated diode rectifier (type ESB 24, ESB 40, ESB 63)
• Terminals are delivered in open position
• Protection against accidental direct touch
• Extensions 2, 3,or 4 poles depending on the ratings, without built-in auxiliary contacts

Accessories

• 2-pole auxiliary contacts for type ESB 24, ESB 40, ESB63 (addition of one 2-pole block type EH 04 .. for module).
• Sealing cover
• Distance piece