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.
Cd-x08 series 3 digital temperature controller
Feature
1. New algorithm using fuzzy logical pid control
2. Six alarm mode setting freely
3. Tc input, rtd input, voltage input, ampere input
4. Relay output, voltage output, ampere output
5. 3 digit led display
Model and parameter
1.How to select input type
Rtd Pt100(0-499.9ípc) No need custom-mode; free exchange the input way
Tc K(0-600ípc)
R(0-1600ípc), s(0-1600ípc)ú¼bú¿0-1800ípcú¬ú¼eú¿0-1000ípcú¬ú¼nú¿0-1200ípcú¬ú¼jú¿0-800ípcú¬ú¼tú¿0-400ípcú¬ Need custom-mode
2.Technical parameters
Measuring accuracy Less ía0.5%f.Síal dig
Control mode On/off control, pid direct action, pid reverse action
Control accuracy ía1ípc
Control output Relay output, voltage output
0-10madc output, 4-20madc output
Relay contact burden 3a/250vac
Power 90-250vac 60hz
Anti-interference Iec 3g
Cd-xoo series 4 digital temperature controller with following details.
Feature
1. New algorithm using fuzzy logical pid control
2. Six alarm mode setting freely
3. Tc input, rtd input, voltage input, ampere input
4. Relay output, voltage output, ampere output
Model and parameter
1.How to select the type
Standard signal 0-5vdc input, 1-5vdc input
0-10madc input
4-20madc input Level input is 0-50dvc
Rtd Pt100 (0-499.9íµ), gu50(0-99.9íµ) No need custom-made; freee
Exchange the input way
Tc K(0-600íµ), j(0-800íµ), t(0-400íµ
R(0-1600íµ), s(0-1600íµ), b(0-1800íµ), e(0-1000íµ), n(0-1200íµ), l Need custom-mode
2.Technical parameters
Measuring accuracy Less ía0.5%f.Síal dig
Control mode On/off control, pid direct action, pid reverse action
Control accuracy ía1ípc
Control output Relay output, voltage output
0-10madc output, 4-20madc output
Relay contact burden 3a/250vac
Power 90-250vac 50hz/ 60hz
Anti-interference Iec 3g
VA1 is a bi-metal constructed thermostat/thermal protector with low resistor circuit and gold diffused point devise inside. Its tiny size and constant temperature controlled make it exceptionally suitable for electric blanket, heating pad and household appliance.
24.3 x 9.5 x 4.4 mm
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Model VC1 is type of thermostat/thermal protector consisted of bimetal construction. Low resistor circuit with gold diffused point devise inside .It is suitable for household electrical appliance, dynamoelectric tool and battery that required thermal resistance protect.
V6AP A is actuated by current passing through it and by the heat received from the ambient temperature. It has compact design, long lifecycle, reliability and more features. A variety of standard terminal, configurations is available to allow the easiest mounting and handling. Precise tripping time prevents motor overheating.
V8AM is a small metal cased thermal protector, Provide both thermal and current overload protector . Apply to motor AC or DC , Lighting, Transformer, Battery packs, Ballasts and small household application
The energy monitor is helping to change the energy usage habits of households and help family to save energy, money and do something for environment protection.
1) with wireles tranmitting, receiver display the current power information, the money you are spending on power.
2) history power charge you had spent for monthly and annal. Up to 2 years information can be preserved.
3) check from a single location if appliances before leaving your home. Be safe every time you leave your home.
4) an audible alarm for excessive electricity usage
5) power supply: 2pcs aa for receiver; 2pcs aaa for transmitter (not include)
6) wireless transmitting range: up to 30m in room.
7) display currencies: ú, $ & euros
8) day/week/month usage view and daily/weekly/monthly average view
9) clock/date display
10)accessories: 1 receiver, 1 transmitter with, 1 dc adaptor, 1 clip on sensor, 1 instruction manual.
Packingindividual packing: 1pc/pv bag, 1set/ plain paper box; 20pcs/ctn
Carton size:480x250x260mmcarton cbm:0.0312
Qty per carton20pcs/ctncartons per 20' container:833
Gross weight: 12kg/ctnqty per 20' container:16640
Labotrix analysis software
In line with standard for science lab equipment in primary & secondary schools issued by the ministry of education, july 19, 2006. With online and offline capabilities; multichannel data acquisition, completelyindependent research and development. Domestic embedded acquisition system, 7inch highdefinition digitallcd touchscreen. Specific features are as follows:
1, inch lcd color digital display.
2, fullfunction touch operation
3, 4 data acquisition channels, 4 analog channels, 4 digital channels, enabling the connection to four sensors.
4, plug and play sensors and automatic identification
5, 12bit high precision a/d sampling accuracy, up to 420k/s data sampling rate.
6, three standard usb interface, easy connection to keyboard, mouse, memory and other peripheral usb devices.
7, one usb_device standard interface, enabling the synchronization with the pc.
8, one sd interface for easy data storage, system upgrading.
9, builtin network card enabling the access to the internet, lan, pc for data transmission.Builtin supercapacity 4400mah rechargeable battery pack enabling 8hours power supply in the fieldwork.
Advantages
1. Hardware highly concentrated, small size, leegant shape, without external power supply, the use of usb-powered and transmittiong data directly, . Convenient, safe, stable, high-speed, and providing professional experimental integrated solutions
2. Friendly software interface, teaching oriented, graphical operationg interface, simple and poweful.
3. Operating software support for multiple languages, operationg interface can be made to meet usersdemands.Language option switch languge to help reading: french german italian russian spanish portuguese
Overview
Hart intelligent integration temperature transmitter is adopt the latest international digital integrated technology and automatic control with the domestic industry in accordance with the actual needs but the entire research and development of a new generation of intelligent flow totalizer, well-structured, nice appearances, the hardware use such less components and parts, no potentiometer and moving parts, full-featured, easy operation, reliability, high stability, applicable to chemical, petroleum, metallurgy, light industry, food, electricity, energy management and other fields.
Display windows : 320í-240 high resolution chart blue-white LCD
Input accuracy: í+ (0.2%F.S+1) digit
Input type: Standard voltage 0-5V, 1-5V
Standard current 0-10mA, 4-20mA
T.C: K, S, B, T, E, J, Wre325, N
RTD: Pt100, Cu50, Cu100
specially input: R, WRe526, the mV signal, other
output types: Switch output: Relay contact output (resistance 250VAC/0.8A or 250VAC/3A)
the SSR trigger (12V/50mA)
DC12V/50mA
DC24V/50mA
DC5V/50mA
transform output: 4-20mA (the load <650ª+)íó1-5V
0-10mAú¿the load <1000ª+ú¬íó0-5V
Communication connection: RS232 or RS485
storage medium: U disk/256M, U disk/512M
Record : 16 pens
without U disk, 23.6 days /pen (1 sceond interval) ~15 years /pen (4 minutes interval)
U disk/256M, 256/4í-[23.6 days /pen (1 sceond interval) ~15 years /pen (4 minutes interval)]
Storage time: T=storage capacity/ the sum of the reciprocal of each open channelí»s record interval; when storage data is temple, the storage capacity also the total storage is 4000í-504.
For example: when the storage data is temple, the open channels are 1, 3, 5, 7, the record interval of every channel is 1second, 5seconds, 10 seconds, 20seconds, then
T= 4000í-504/(1/1+1/5+1/10+1/20)=1493333 seconds=414.8 hours=17.28days.
(note: the total storage is 976í-504 when channelsí_8)
cut off protection time: the data can be stored forever when the electricity is cut off for it adopts FLASH MEMORY, it can run accurately when cut off if hard clocks is equipped.
Power source: Switch power supply 85VAC-264VAC, 50Hzí+1Hz, power consumption 12W
Ambient temperature: 0-45 íµ
ambient humidity: 0-85%RH.
1.Fast response , high sensitive.
2.Glass sealing, able to stand for low temperature
3.Coaxial structure makes it easy to install and can stand for high temperature
R value :10k--5000k
B value :3950, 3899, 4020, 4050, 4200, etc.
Precisionú¦+/-1%--+/-10%
I.Functional Characteristics
1.Provides remote start port, time setting function of delayed start and stop ;can control genset to start , stop and load automatically.
2.All the relay output contact capacity is over 10A.
3.Convenient ATS control function, with mains supply output and genset emergency supply output.
4.Two connecting ways of Coolant temperature and oil pressure:analog measurement and alarm switch
5.Auto-record the running time of genset.
6.Protection functions: low oil pressure, high coolant, over speed, emergency stop and over crank, ect.
II.Functional Characteristics
1.Dual processing chip, real virtual value measurement, agile reaction
2.Mains supply and genset power supply management, ATS control
3.Large screen backlight character LCD display
4.Chinese and English menu, interactive operation. Can be set and operated without computer.
5.Auto start, auto protection
6.Perfect auto protection, direct character display alarm details and working state, more than 50 fault records.
7.Large numbers of connected parameters: double coolant temp., double oil pressure, fuel level and oil temp. etc.
8.All the relays contact capacity is over 10A/250VAC/30VDC.
9.Electronic speed governing and mechanical speed regulation (controlling DC motor directly arecompatible. Many user-defined settings: timing start or stop etc.
10.RS232 communication, attached fªfour-remote controlfª monitoring software
11.Unique rubber bearing design with waterproof, dustproof and shock absorption features.
1. Fractional horsepower motor
2. Fluorescent ballasts
3. Motor of washer
4. Motor of
5. Transformers
6. Lighting lamps
7. Dc motor of automobile
8. Battery changer
9. Household electric appliances
10. Oa-machines etc.
Key specifications/special features:
1. Dimension case: 18.5mmx6.7mmx3.6mm
(with leading wire 45mm-5mm normally)
2. Rated voltage: ac250v/125v (50/60hz)
3. Rated current: 6a/12a
4. Rated open temperature range: 45~145 degrees centigrade, in steps of 5 degrees centigrade.
5. Tolerance: (+/-)5 degrees centigrade
6. Resetting temperature: lower than rated open temperature 30(+/-)15 degrees centigrade
7. Switching cycles in: 10, 000 cycles
8. Contact arrangement: normally closed
9. Standard contact resistance: ≤50mª+
Pack information: to be informed
Third party certificates:
Vde ul
Product sample availability policy:
Free below 10 pcs samples but transport charge
Order lead times(days):
7~10 days
Minimum order quantity:
No
Ptc thermistors are used to monitor temperature in machines and installations. The design ensures short response times and easy installation.
The product sells point
Ptc thermistors acc. To din 44081(triple sensors acc. To din 44082) are used to protect electrical machines against thermal overload. Thermistors have an even steeper r/t characteristic as that defined in the din standard. The temperature range is from 60 to 180. Ptc thermistors beads with different rated response temperatures can be connected in series. This permits an optimal and economic thermal protection of machines and windings with different limit tempratures.
Key specifications/special features
Single triple
Max.Operating voltage 30 30 v
Rated response temperature tk60-18 c
Tolerance of tk ía5 ía5 k
Resproducibility of tk ía0.5 ía0.5 k
Resistance r25 ín100 ín300 ª+
Resistance at a temperature of tk-5k ín550 ín1650 ª+
Resistance at a temperature of tk +5k í²1330 í²3990 ª+
Resistance at a temperature of tk +15k í²4 í²12 kª+
Thermal response time td ín5 ín5 s
Insulation test voltage v ac2.5 ac2.5 kv
Max.Operating temprature 200 200 c
Max.Storage temperature 160 160 c
Min.Srorage temperature -25 -25 c
Weight 2 3.5 g
1.Hid ballast,
2.Battery packs,
3.Fractional power motor,
4.Ac brushless motor and pump,
5.Dc motor, heating appliance
(best replacement of ys-11 and st22)
The product sells point
1.Club-shape contact, jointing better with spot welding
2.Miniature size
3.Positive make and break with snap-action disc
4.Repeatable temperature performance over life
5.Various resistances of bimetal avaliable
6.Gasketed case suitable for most impregnation processes
7.Substitute ys-11, st22 series
Key specifications/special features
Maximum contact ratings10k(10a/24vdc 5a/250vac)
Opening temperature 30~155 ípc
Telorance ía5 ípc
Resistance less than 25 mª
1.It is made of specular stainless steel(304 in China) and semicirular arcs at corners ensures easy cleaning.
2.Microprocessor temperature controller makes temperature stability.
3.Door temperature controller prevents dewfall on glass door of incubator effectively.
4.Microorganism filter at inlet provides 100% filtrated gases.
5.Main parts are all imported,equipped with CO2 pressure releasing valve.(Special for CO2 incubator)
Model HHCP-T(80L)with UV light
Electrical Requirement 220V 50HZ
Input Power (W) 450
Heating Method Air-jacket
Temperature Range(Degree) RT+5~50
Temperature Control (Degree) 0.1
Temperature Stability(Degree) 0.3
CO2 Range 0~20%
CO2 Recovery Calibration*1.2min
Humidifying Method Natural Evaporization
Ambient Temperature(Degree) +5~35
Cubage(L) 80L
W*D*H Interior Dimension(mm) 500*400*400
W*D*H Overall Dimension(mm) 570*570*820
Shelves per Chamber 2PCS .
Packing Style: Standard Export Packing Style
W*D*H Packing Dimension(mm): 710*710*920
Gross Weight: 67KG
Net Weight: 51.5KG.
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