Howard Butler Ltd

The range features 2 synchroscopes : LED synchroscope & LED synchroscope with check sync relay, both housed in 96x96mm DIN cases. The LED Synchroscope is used for manual synchronisation and optically indicates the electrical phase difference between two ac voltages. The LED synchroscope with check sync relay has a relay output which is controlled in Live Bus situations by differential voltage and phase angle and in dead bus where no system voltages are detected. The input voltages are detected by the input resistor and power supply transformer and the microcontroller is programmed to operate the relay according to the preset options.

The M100-TAP measures the value of resistance on tap position changers, typically used on high voltage transformers. Each position on the selector has an equal value of resistance so that as the tap position is increased or decreased the value of resistance increases or decreases respectively, The M100-TAP measure the value of this resistance and provides an output proportional to the value of the number of taps selected. The M100-TAP can also be used to measure variable resistance 2 or 3 wire systems.

Test Equipment - Automotive supplied by Howard Butler Ltd

Test Equipment - Automotive, Electrical supplied by Howard Butler Ltd

The M100-TJ1 and TK1 measure the millivolt drop of J and K type thermocouples respectively. Thermocouples are made from two dissimilar metals and as the temperature rises, the mV accross the thermocouple increases. The millivolts voltage developed corresponds to the change in temperature, thermocouple manufacturers provide tables showing temperature versus voltage drop. The M100 TJ1/TK1 measures this voltage change and converts it to an output signal that corresponds to the temperature being monitored. The output from the M100-TJ1/TK1 is not linearised. Thermocouple temperature measurement is used in a variety of applications, including monitoring of temperature of furnaces etc. The M100 thermocouple transducer is provided with automatic cold junction temperature compensation over the range 0-50ºC. Also provided is thermocouple break protection should the thermocouple leads break, the output from the transducer will go to its maximum or minimum output value, depending on which option is chosen at the time of ordering.

A range of ring type current transformers suitable for primary currents from 1A-5000A with 1A or 5A secondaries. This standard range of measuring and protective current transformers is available as resin coated or tape wrapped. Suitable for measuring or protective applications with accuracies of class 0.2, 0.5, 1, 3, 5P10, 10P10 etc.

Here at Howard Butler we manufacture instrumentation and control products including:

• Current transformers
• Power meters
• Digital panel meters
• Transducers

For over 100 years we have been manufacturing in the UK and we export worldwide. Please visit our website or contact us for more information.

Transducers - Frequency supplied by Howard Butler Ltd

Transducers - Linear Displacement supplied by Howard Butler Ltd

Transducers - Power Factor supplied by Howard Butler Ltd