Power ntc thermistor description
Power ntc thermistor can be a cost effective device to limit the amount of inrush current in a switching power supply or other devices when the power is first turned on. Power ntc thermistor limits surge current by functioning as a power resistor which drops from a high cold resistance to a low hot resistance when heated by the current flowing through it.
Inrush-current limiters power ntc thermistor protect circuits from undesirably high currents, suppressing high inrush current surges, while its resistance remains negligible low during continuous operation. Thanks to their low resistance in the operating state, power thermistor have a considerably lower power dissipation than the fixed resistors frequently used for this application.
Inrush current limiting power ntc thermistor application
Limiting surge current, suitable for the protection of switch mode power supply, ups power, transformers, motors, various electric heating utensil, energy saving lights, ballast, various power circuit, amplifiers, colored displayer, monitors, color tv, filament protection, etc.
Power thermistor components can also be used for the soft starting of motors, for example in vacuum cleaners with continuous currents of up to 20 a.
Inrush current limiting power ntc thermistor advantages
Low cost solid state device for inrush current supression.
Minimise line current distortion and radio noise.
Protect switches, rectifier diodes and smoothing capacitors against premature failures.
Prevent fuse from blowing in error.
Inrush current limiting power ntc thermistor features
Resin coated disk thermistor with uninsulated lead-wires.
Suitable for both ac and dc circuits up to a voltage of 265 v(rms).
Wide range of resistance, current and dimension.
Excellent mechanical strength.
Suitable for pcb mounting.
Ntc thermistors, ptc thermistors, temperature sensor , medical sensor, medical probe, temperature probe, silicon temperature sensor, inrush current limiting power ntc thermistor, sensing thermistor, control thermistor, fuse thermistor, thermal resistor, current protector.
PTC thermistors current protector, also called PTC thermistor resettable fuses, protect load against over-current, overload, short circuit. No need for replacement, resume protective function after a short cooling-down time.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
PTC Thermistor Over-current Protector Application
It applies in the over-current overload and short circuit protection of transformers, battery charger, switches, switch power supply, adaptor, meter, instrumentation, apparatus, electronic coils, control panels, air conditioner, automotive electron, etc.
Operating Principle of PTC Thermistor for Overload Over-current Protection
The operating principle is as indicated in the following. When a circuit is in the normal status, the current through PTC is lower than the rated current and PTC thermistor protector is in the normal state with small resistance value, which will not affect the normal operation of the protected circuit. In case of some fault in the circuit and the current is greater than the rated current, the PTC thermistor protector will become hot quickly and present a high resistance state, which sets the circuit relatively "off" to protect the circuit from damage. After the fault is removed, PTC thermistor protector will automatically restore its low resistance state and the circuit will resume normal operation.
Normally, when PTC thermistor is used as an overcurrent protection component, it is preferred to select maximum operating current, maximum operating voltage and proper specifications. Furthermore such factors should be taken into consideration as the dimensions of the components, rated zero-power resistance, operating temperature range, etc.
PTC thermistors current protector, also called PTC thermistor resettable fuses, protect load against over-current, overload, short circuit. No need for replacement, resume protective function after a short cooling-down time.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
PTC Thermistor Over-current Protector Application
It applies in the over-current overload and short circuit protection of transformers, battery charger, switches, switch power supply, adaptor, meter, instrumentation, apparatus, electronic coils, control panels, air conditioner, automotive electron, etc.
Operating Principle of PTC Thermistor for Overload Over-current Protection
The operating principle is as indicated in the following. When a circuit is in the normal status, the current through PTC is lower than the rated current and PTC thermistor protector is in the normal state with small resistance value, which will not affect the normal operation of the protected circuit. In case of some fault in the circuit and the current is greater than the rated current, the PTC thermistor protector will become hot quickly and present a high resistance state, which sets the circuit relatively "off" to protect the circuit from damage. After the fault is removed, PTC thermistor protector will automatically restore its low resistance state and the circuit will resume normal operation.
Normally, when PTC thermistor is used as an overcurrent protection component, it is preferred to select maximum operating current, maximum operating voltage and proper specifications. Furthermore such factors should be taken into consideration as the dimensions of the components, rated zero-power resistance, operating temperature range, etc.
Linear PTC Thermistor (LPTC) resistance increases with the temperature rises in linearity, displays a virtually linear positive temperature coefficient over their entire temperature range, suitable in measurement and control system, temperature compensation. As the construction material is mainly semiconductor monocrystalline silicon, also called silicon temperature sensor, silicon thermistor, sometimes referred to as silistors. As the temperature coefficient is positive, the silicon temperature sensors exhibit fail-safe operation when a system overheats. Furthermore silicon is inherently stable, so silicon temperature sensor are extremely reliable and have very long operational lifetimes. Hermetically sealed glass package, axial leaded, 2 leads, can operate in high temperature and moisture environment. Linear PTC thermistor in small dimension, tightness, convenient for automatic installation.
AMWEI Linear PTC Thermistor (LPTC) Features:
1. Silicon temperature sensors have a TK (temperature coefficinet) which is nearly constant over the complete temperature range. Temperature coefficient a25/50>=0.7%/C.
2. Excellent long term stability, annual diversification rate <=0.01C/per year, temperature drifts during the lifetime of silicon temperature sensor are negligible.
3. Thermal Time Constant: 10 seconds max in still air.
4. Operating temperature range -50C--+150C.
5. Dissipation factor 2.5--5mW/C.
6. Maximum operating current Iopr=1.0mA.
7. Rated power 10mW.
8. Resistance at 25C optional 600 ohm, 1000 ohm, 1600 ohm, 2000 ohm.
For AMWEI AM-LPTC600, AM-LPTC1000 part can be matched with Philips silicon temperature sensors part KTY84, KTY81.
Silicon temperature sensor Application:
1. Industrial automation control equipment.
2. Home appliance temperature detection and compensation.
3.Precision circuit and crystal oscillator temperature compensation.
4.Temperature compensation of silicon semi conducting devices.
5.Temperature compensation of instrumentation amplifier.
6.A/D converter temperature compensation. íñ Micro motor timing control.
7.Automobile temperature detection and control.
8.Medical equipment temperature detection and control.
9.Linear PTC thermistor applications also include transmission, engine oil and coolant, heating system, overheating protection, amplifiers, power supplies, transducers, telemetry, computers, magnetic amplifiers, thermometry, meteorology, temperature regulation and over-temperature protection.
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Temperature Protection PTC Thermistor Description
PTC (positive temperature coefficient )thermistor switches at one particular temperature. Making use of the characteristics that the resistance of PTC thermistor increases sharply above curie temperature, when ambient temperature increases abnormally, protective circuit installed PTC thermistor will turn on or cut off loop through resistance changing, achieving thermal protection purpose. PTC thermistor protect such equipment and components as motors, transformers, power transistors and thyristors against over-temperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more accurately specified. It is also smaller and easier to design-in to electronic circuitry. Therefore PTC thermistor can be ideal devices for temperature detection, monitoring, indicating, limiting and over (excessive) temperature protection.
Typical Application of PTC Thermistor for Temperature Protection and temperature limiting sensors
Limit temperature measurement of Industrial electronics application.
Power supplies, switch power supply.
Home appliances, such as dish washers, washing machines, ironing machines, electric cookers, etc.
Electronic data processing and communications engineering (DC/DC converters).
Motor windings overheating Protection.
Automotive electronics.
Semiconductor heatsinks, enclosure panels, temperature-limited transistors.
Lighting applications.
Features of PTC Thermistor for Temperature Protection and temperature limiting sensors
2 Outlook construction: A-radial leaded epoxy resin coated form, B-metal tag lug form.
PTC Thermistor Protection temperature: 60-130C
Quick response.
Long stability.
Small dimension, convenient for installation.
Do not need to be reset after protection.
Telecom PTC Thermistor Description
This series of ceramic PTC (positive temperature coefficient ) thermistors help provide protection against power cross, power induction surges and lighting surge defined in ITU, Telcordia, UL. Available in chip, radial-leaded coated and non-coated, SMD, twin vertical surface mount configuration. PTC thermistor overcurrent protector provides reversible, self-resetting protection against over-currents of telecommunication line protector units, improve the reliability of custom premises and network equipment.
Ceramic PTC thermistors can be found providing re-settable line protection at the exchange, monitoring hot spots and protecting ringers, battery feeds, transformers and relay circuits. Also used extensively to protect the mobile phone's battery pack against overcharging in land-based and radio mobile communications.
Advanced developments in telecom equipment in recent years have radically altered the protection requirements of both exchange and subscriber equipment. The PTC thermistor must protect the telephone line circuit against overcurrent, which may be caused by the following examples:
Surges due to lighting strikes on or near to the line plant.
Short-term induction of alternating voltage from adjactent power lines or railway systems, usually caused when these lines or systems develop faults
Direct contact between telephone lines and power lines.
To provide good protection under such conditions, a PTC thermistor is connected in series with each line, usually as secondary protection; However, even with primary line protection (usually a gas discharge tube), the PTC thermistor must fulfill severe requirements.
Surge pulses of upto 2KV can occur and in order to withstand short term power induction, the PTC thermistor must withstand high voltages. If the line has primary protection, a 220V to 300V PTC thermistor is adequate. Without primary protection, 600V PTC device is necessary. We can manufacture a series of PTC thermistor fulfilling both requirements.
Typical Application of PTC Thermistor in Telecommunication Protection
Central Office Switching Equipment (C.O), analog and digital line cards, T1/E1 equipment, xDSL modems and splitters, multiplexers, CSU/DSU, servers.
Primary Protection Modules, MDF (main distribution frame) modules, network interface devices (NIC).
Custom Premises Equipment, also known as subscriber terminal equipment (T.E.), IT equipment: Modem, phone sets, fax machines, phone wall outlet (plugs), alarm systems, answering machine, PBX systems, ADSL Splitters, internet appliance, POS terminals.
Access Network hardware, LAN WAN equipment, Powered Ethernet systems, VoIP (voice over IP equipment), Set-top box (S.B), etc.
Telecom PTC Thermistor Features
Compliant with ITU-T K20 K21 K45
Basic level lightning surges (10/700ª¦s)
Basic level power Induction (600V,1A,0.2S)
Power contact criteria A/B (230V,15min.)
Suitable for continuous connection to main voltage 110/230 VAC in tripped (high ohmic) condition.
Thermistors, PTC thermistors, NTC thermistors, thermistor temperature sensor probe, silicon temperature sensor, inrush current limiting power NTC thermistor, sensing thermistor, control thermistor, fuse thermistor, thermal resistor, current protector.
Inrush Current Limiter Power NTC Thermistor MF72 5D-13 5Ohm 13mm 5A For Power Supply
III Description Of Power NTC Thermistor
Inrush Current Limiters are used to reduce the inrush current that occurs when an electrical device is switched on. High inrush current is the result of the maximum instantaneous input current drawn by an electrical device during the initial power up. As technology continues to advance, most systems today run efficiently and maintain a low impedance which in turn contributes to high inrush current.
MF75 Super Power NTC Thermistor For Audio Power Amplifier Inrush Current Protection
I Description Of The MF75 Super Power NTC Thermistor
Inrush current is the momentary surge of current created when power is turned on to motors,transformers,power suppliers and heating elements. The more power required by industrial equipment,the larger the inrush current. It can effectively quench the inrush current by means of in series with power NTC thermistor in return circuit of power supply. The thermistors resistance decreases dramatically following the inrush,allowing the steady state curent to flow with very little resistance.This effect provides inrush current protection, yet allows efficiency during normal operation.The power NTC Thermistor produced by Dongguan Ampfort Electronics Co.,Ltd. with large scale,especially MF73T,MF73,MF74,MF75 serial products with big size,which can be applied in such inrush protection with industrial level as industrial robots and automation.
II Application Of The MF75 Super Power NTC Thermistor
> Nuclear magnetic resonance equipment
> Super power audio power amplifier
> High power circle transformer
> The solar panel arrays with high capacity power inverter
> The industrial robot drived by high voltage power supply
IV Specification Of The MF75 Super Power NTC Thermistor
Body diameter 40mm
P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC
MF75-0.2/55 0.2 2600 55 0.007 30 55 350 8000
MF75-1/45 1 2600 45 0.01 6800
MF75-2/35 2 2600 35 0.014 6800
MF75-5/27 5 3000 27 0.028 4700
MF75-8/22 8 3200 22 0.034 3300
MF75-10/21 10 3200 21 0.038 3300
Body diameter 45mm
P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC
MF75-0.2/70 0.2 2600 70 0.006 45 70 480 11500
MF75-0.5/55 0.5 2600 55 0.007 8000
MF75-1/52 1 2600 52 0.009 8000
MF75-2/45 2 2600 45 0.012 8000
MF75-5/35 5 3000 35 0.025 6800
MF75-10/28 10 3200 28 0.032 4700
Body diameter 50mm
P/N R25±20%() Thermal sensitive index B±10%(K) Max steady state current Imax(A) Approx R of Max current Rmax() Max power dissipation Pmax(W) Dissipation factor(mW/C) Thermal time constant (s) Max impulse capacitance (uF)240VAC
MF75-0.2/90 0.2 2600 90 0.004 55 90 650 15000
MF75-1/60 1 2600 60 0.008 11500
MF75-2/50 2 2600 50 0.011 11500
MF75-5/40 5 3000 40 0.022 8000
MF75-8/32 8 3200 32 0.028 6800
MF75-10/30 10 3200 30 0.03 6800
WE MAY HAVE THE COAL OR PET COKE THAT YOU ARE LOOKING FOR. WE ARE CURRENTLY SHIPPING AT THIS TIME AND WELCOME AN OPPORTUNITY TO BE OF SERVICE.
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# Description Comments
1 Coking Coal Low Vol, Mid Vol and High Vol Coal
Tonnage Available 65K MT-100K MT/Month/36 Months
Delivery Port East Coast USA (Norfolk or Baltimore)
2 Thermal Coal Sulfur: <1.0%, <2.0%, <3.0%
Tonnage Available 100K MT/Month/36 Months
Delivery Port Gulf Port USA (New Orleans or Mobile)
3 Green Petroleum Coke Sulfur: <5.0%, <7.0%
Tonnage Available 55K â?? 70K/Month/36 Months
Delivery Port Gulf Port USA (Houston)
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Giva Agro's Hydrosols: A Pure, Versatile Essence for Natural Well-being
At Giva Agro, our hydrosols, also known as floral waters, are a testament to our commitment to providing natural, pure, and sustainable wellness solutions. Derived from the steam distillation process of plant materials, our hydrosols capture the essence of the plant in a form that's gentle yet potent, offering a multitude of uses in skincare, aromatherapy, and holistic health practices.
What Makes Our Hydrosols Special?
Pure and Natural: Each batch is distilled from high-quality, organic plant material, ensuring that every drop is as pure and natural as possible.
Sustainably Sourced: We prioritize sustainability in our sourcing, working closely with local farmers and suppliers who share our commitment to the environment and ethical practices.
Versatile Applications: Giva Agro's hydrosols are incredibly versatile, suitable for use in cosmetics, aromatherapy, medicinal applications, and even culinary uses, providing our B2B customers with a wide range of possibilities.
Quality Assurance: Adhering to our stringent quality standards, our hydrosols are free from preservatives, alcohol, and additives, ensuring they retain their natural properties and benefits.
Our Range of Hydrosols
We offer an extensive selection of hydrosols to cater to various needs and preferences, including but not limited to:
1.Lavender Hydrosol: Perfect for soothing the skin and calming the mind.
Rose Hydrosol: Ideal for hydrating and revitalizing skin, as well as enhancing mood.
2.Chamomile Hydrosol: Known for its anti-inflammatory properties, great for sensitive skin.
Peppermint Hydrosol: Refreshing and cooling, excellent for mental clarity and digestion.
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Giva Agro is dedicated to harnessing the gentle power of nature through our hydrosols, providing natural, effective solutions for a wide range of applications. Whether you're a spa, wellness center, cosmetic brand, or a business looking to incorporate natural ingredients into your offerings, our hydrosols are designed to meet your needs, ensuring purity, potency, and sustainability.
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Visit our website or contact us to learn more about our products and how we can support your business.
We have 4sets of used Detroit generators that were used as emergency power sources (Standby only) at a municipal water drainage plant in Korea. Please review the attached documents and assess
ENGINE SPECIFICATION
ENGINE MODEL Detroit Diesel 8163-7416 1232HP
ENGINE NO. 16VF013546
RPM 1,800
Cylinder 16
Injection method Direct injection
Cooling method Water Cooled
Fuel consumption rate 246â??/h
GENERATOR SPECIFICATION (AC Generator, 3Ã??, 60Hz, Brushless type
Generator Model DIG 4800
Emergency output 990 kVA / 792 kW
Continuous output 900kVA / 720kW
Voltage and Current 600 v x 86.6 A
Revolution 1800RPM
Excitation Voltage/Current 65V/10A
Power Factor 80%
Insulation Class F
We raise many different varieties of apples and do our best to keep up with the availability on the chart below. Please keep in mind that some varieties are in very limited supply, and we are at the mercy of Mother Nature. If you are making a special trip based on this chart, give us a call to confirm that your favorite apple hasnâ??t recently just sold out! Please note: these apples are available for sale and may not be the variety for pick-your-own. Please check with our market for a schedule for apple picking or check the front page of the website for the current schedule
ICUMSA : 45 RBU ICUMSA
Attenuation index units Method # 10-1978
ASH CONTENT : 0.04% Maximum by Weight
MOISTURE : 0.04% Maximum by Weight
MAGNETIC PARTICLES : mg/kg 4
SOLUBILITY : 100% DRY & Free Flowing
GRANULATION : Fine Standard
POLARIZATION : 99.80º Minimum
Max AS : 1 P.P.M.
Max OS : 2 P.P.M.
Max CU : 3 P.P.M.
COLOUR : Sparkling White
SEDIMENTS : NONE
SO : mg/kg 20
REDUCING SUGAR : 0.010% Maximum in Dry Mass
RADIATION : Normal w/o presence of cesium or iodine SO2: Certified
SUBSTANCE : Solid, Crystal
SMELL : Free of any Smell
HPN STAPH AUREUS : per 1 gram NIL
MICROBIOLOGICAL LIMITS : Pathogenic Bacteria including Salmonella per 1 gram NIL Bacillus per 1 gram NIL
PESTICIDE TRACES : Maximum mg/kg Basis DDT 0.005 PHOTOXIN 0.01 HEXACHLORAN GAMMA ISOMER 0.005
CROP: :Current Year
Packing: In 50 KG Bags
Inspection: SGS at loading port and sellers cost,
Product: white refined beet ICUMSA 45 conforming to the following specifications and/or international standard specifications, fit for human consumption CONSUMPTION
BEET SUGAR: REFINED TO ICUMSA 45 RBU STANDARDS
COLOR: WHITE
POLARIZATION AT 20C: 99,8% MIN.
ASH CONTENT: 0,04% MAX.
MOISTURE: 0,04% MAX.
REDUCING SUGAR: 0,05% MAX. BY WEIGHT
PB CONTENT 1 PPM MAX.
AS CONTENT 1 PPM MAX.
CU CONTENT 3 PPM MAX.
HPN STAPH AUREUS: NL (100 MC)
SUBSTANCE: CRYSTALS
SOLUBILITY: 100% DRY AND FREE FLOWING
SEDIMENTS: NONE
GRANULATION: MEDIUM TO FINE
MAGNETIC PARTICLES: 4MG/KG MAX.
SO2 CONTENT: 20 MG/KG MAX.
RADIATION: CS-137
During last decade Guar has immerged as an important industrial raw material and Produced by man for thousands of years. India has been the single largest producer and exporter of Guar gum accounting for more than 80 percent of the global output and trade.
Guar has now assumed a larger role among the domesticated plants due to its unique functional properties.
India Ranks First in the production of guar which is grown in the North Western part of the Country which mainly includes the states of Rajasthan, Gujarat, Haryana and Punjab. Other main countries are Pakistan, U.S.A and Brazil
The by-product of Guar Gum industry consisting of the outer seed coat and germ material is called guar meal. The Guar meal after gum Extraction is a potential source of protein and contains about 42% crude protein which is one and a half times more than the level of protein in guar seed. The protein content in guar meal is well comparable with that of oil cakes. It is used as a feed for livestock including poultry. Guar meal contains two deleterious factors i.e. residual guar gum and trypsin inhibitor, Toasting of Guar Gum improves its nutritive value in chicks. Toasted guar Meal can be used in limited quantity i.e. Up to 10% in Poultry diet. However it can replace groundnut cake by almost 100% in animal feeds.
Guar Gum (Galactomanan) is a high molecular weight carbohydrate polymer made up of a large number of mannose and galactose unit linked together. The crude Guar Gum is a greyish white powder 90% of which dissolves in water. It is non ionic polysaccharide based on the milled endosperm of the guar bean whose average.
Composition is:
Hydrocolloid: 23%
Fats: 40%
Proteins: 34%
The most important property of the Guar is its ability to hydrate rapidly in cold water to attain a very high viscosity at relatively low concentrations. Its specific colloidal nature gives the solution an excellent thickening power which is 6 to10 times thicker than that obtained from starch. It is stable over a wide range of PH and it also improves the flow ability and pump ability of the fluid. It is a superior friction loss reducing agent.
Single phase & three phase distribution transformers, power transformers, dry type ct pt (current transformer potential transformer), electric meters, drop out fuses & lightning arresters, high tension switchgear & substation equipment, spun prestressed concrete (spc) poles amongst other varieties of elements of a distribution grid..
Dolomite powder is used as a raw material for the production of high-grade glassware, medicine bottles and optical glass.
Dolomite powder has limited dosage in paints, confined to be used as filler, mainly playing the role of white pigment. However, due to the coarse particles, refractive index and paint solvent similar to the covering power is weak, there is no certain special role in the application, just for the body pigment filler paint.- Used in the building materials and refractory materials, chemical and agricultural, environmental protection, energy conservation and other fields.
- Used in the production of glass and ceramic ingredients;
- Used as refractory inner layer, slag making agent, cement raw material, glass flux, kiln industry, building and decoration stone material, paint;
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