Mains Transformers Types

 Electrical, Power Electronics  No Responses »
Sep 222008
 
Mains Transformers Types

These are Transformers Made by Hammond Manufacturing Classic Transformer Terminals Transformer PCB Transformer Toroidal Transformer Split bobbin assures product safety. Easy Cabinet or Panel mount. Wires for connection-termination. Mechanically Sturdy, use ‘lock nuts’. Easy replace on service. Panel-Cabinet Mount. Clamp Serves as Shield. Split Bobbin Insulation. Mount on PCB and Solder. More Reliability, no-wires. Winding slip not possible. Make Modular supply card. High Efficiency. Low Heat inside box. Low Profile and space. Long Life and low EMI. Hammond Transformer Technical section. Output Transformer Design and Winding ETE 3 Phase Transformer Info How transformers, chokes and inductors work, and Properties of [Read More ....]

 Posted by at 7:19 am

Tacho Counter for Speed and Quantity Measurement

 Process Control  No Responses »
Sep 222008
 
Tacho Counter for Speed and Quantity Measurement

This was a Custom Built Product for Converting a 10-100 V Signal from a Motor Tacho to pulses, to indicate the distance moved by Conveyor belt with Job Material. The Digital Indicator would indicate the speed and the Mechanical Counter would Log Quantity of Materials Moved. Voltage to Frequency Converter ICL8038

 Posted by at 6:00 am  Tagged with:

Temperature Calibrator Milli Volt Source

 Instrumentation  No Responses »
Sep 212008
 
Temperature Calibrator Milli Volt Source

This is a Milli-Volt and Milli-Amp Source for Calibration of Temperature Measurement and Control Instruments using Thermocouples. There is also a Passive Variable Resistance Source for Simulating a PT-100 RTD Sensor. This calibrator was a simple solution i built. This instrument itself was calibrated by Instruments like the Calibrators from Omega which are the best you can get. Related Resources – Temperature, Thermometer, Thermister and RTD Calibrator Cole-Parmer Catalog – Calibration Equipment Temperature Calibration in Industrial Processes Martel Calibrators – Temperature Calibrators Thermocouple Calibration Furnace Thermocouple Simulator-Calibrator

 Posted by at 5:10 pm  Tagged with:

Temperature Controller 48-96

 Process Control  No Responses »
Sep 212008
 
Temperature Controller 48-96

A 1/8 DIN Indicating Temperature Controller. This is a Analog Controller built around ICL7107. Read more here Temperature Measurement and Control. This is a 48-96 DIN Temperature Controller, it is mains operated, it is in a Industrial Plastic Housing. It is not meant for very harsh environments. Suitable for Control Panels in Control Rooms. It has a accuracy and linearity of 0.5%. It had options of on-off or time proportional control Related Resources 1/8 DIN Digital Proportional On/Off Temperature Controller Temperatur control simulation Automatic Temperature Controller West Instruments – Danaher Sensors and Controls

 Posted by at 7:30 am

Megger or Insulation Tester

 Electrical, Instrumentation  No Responses »
Sep 202008
 
Megger or Insulation Tester

Decades ago, when a customer found that my Tera Ohm Meter expensive, He suggested the specs for this low cost scaled-down model. This was found useful for people sub-contracting Telecom Equipment Manufacturing. Related Resources – Megger – Electric Power Test Equipment Megger-Wikipedia Megger instrument for measuring the insulation resistance High voltage ohmmeters Insulation Testers / Earth Tester Electrical Insulation Testing Products Insulation Resistance Tester

 Posted by at 7:20 pm  Tagged with:

Design of a Constant Current Source

 Uncategorized  No Responses »
Sep 202008
 
Design of a Constant Current Source

This article will explain the way a simple transistor based current source is designed, this will give an idea on how some components can be used in a practical way to make the circuit do some function, the objective is not design but to become familiar with the basic ideas. Requirement. We need a fixed current around 20mA for a voltage variation of 10V to 20V to drive a LED flasher circuit. Component Selection. The transistor should handle 20V * 2 = 40V and a current of 20mA * 5 = 100mA. We have to overrate the components for long [Read More ....]

 Posted by at 8:51 am

Three Phase Solid State Relay

 Electrical, Power Electronics  No Responses »
Sep 202008
 
Three Phase Solid State Relay

This is R-Y-B three phase 40A 440V AC Solid State Relay with 3-30 V DC Control Signal. It has Built in HeatSink and Fan. It is good for Controlling a Bank of heaters. This model could go upto 120A with SSR’s in parallel for Proportional Control. Solid State Relays SSR. This is a Contacter replacement, it will switch R-Y-B phases. It is a high power SSR. In some places it is unwise to use an SSR, a Electromechanical Contacter will perform better. The merit of SSR is fast switching, no wear and tear. No dust humidity influence.

 Posted by at 7:00 am  Tagged with:

Relays and Contactors

 Electrical  No Responses »
Sep 192008
 
Relays and Contactors

Smart Contactors. Timer, Thermostat. Over Current or Voltage. Trip or Limit. Three Phase Trip. High Power. Solenoid hammer. Power Contactors. High Power. Nut-Bolt Mounting. Solenoid hammer. Special Contacts. Special Plastics. Heaters and Motors. Din Rail Contactors. High Power. Easy Replace Rail Mount. Solenoid hammer. Heaters and Motors. Modular, Stackable. SCADA, Control Panels. example Allen Bradley example Moeller example Moeller Medium Power. Solder Terminations. Panel Mount. Solenoid hammer. Low Cost. Time Tested Design. Commercial. Low Power DPDT. PCB Mount. Solenoid hammer. Visual Isolation. Switches Two Loads. Industrial. Low Power. Small Footprint. Solenoid hammer. Communications. Appliance Control. Low Cost. example Alltronics example [Read More ....]

 Posted by at 3:18 pm  Tagged with:

Tera Ohm Meter and Insulation Tester

 Electrical, Instrumentation  No Responses »
Sep 192008
 
Tera Ohm Meter and Insulation Tester

This is a 20 Tera Ohm Insulation Tester I made around 20 Years Back. It had even Polarization Index for Transformer Insulation. It generated 1000V DC Regulated Voltage and the pA leakage Current was Measured. See more here Insulation tester or Tera ohm meter. A regulated, low ripple, high voltage of very low current capability is applied by instrument on a DUT (device under test). The leakage current in nA or pA (picoamps, nanoamps) is measured and readout, The Innovation i did was to measure the current in Vref and not Vin of ICL7107, this made the 1/x computation. Also [Read More ....]

 Posted by at 7:56 am
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