Howard Butler Ltd

Howard Butler Ltd has been manufacturing panel meters, current transformers, relays, transducers and associated products in our UK factory for over 85 years.

Howard Butler Ltd has ISO 9001:2008 approval with a constantly reviewed quality policy. This ensures that through our  vigilance, control, design methods and accountability throughout all stages of design and manufacture quality is designed and built into our products. Our in-house design engineers are able to work with customers to provide custom solutions where our standard product range is not applicable. Our policy is one of continuous improvement, therefore the HOBUT range is regularly added to with new products, mostly designed to IEC, BS, or DIN specifications.

 

We hold extensive stocks of vital components to ensure quick delivery of both standard and special
products. Customer satisfaction is central to the aims of Howard Butler Ltd, with our fully integrated
computer system closely controlling orders, enquiries and stock.

 

  1. Frequency Meter

    Frequency Meter
    Frequency meter available in sizes D48, D72 and D96. Accurate to 0.5%. Available in a wide selection of frequency ranges. Ranges incorporating RPM also available.
  2. Frequency Transducers

    Frequency Transducers
    The M100 series of frequency transducers are designed to measure frequency in single and 3 phase systems. The A.C. Input is converted to a D.C. output that is directly proportional to the change in input frequency within a specified span. The M100-FA1 is self powered (No auxiliary required). The working voltage range is 75% to 125% of the nominal voltage. The M100-FL1 is auxiliary powered. The outputs are live zero, either 4mA or 1 volt. The auxiliary enables the working voltage range to be 15%-125% The M100-FX1 is essentially the same as the FA1 but an auxiliary is provided to enable the unit to have a working voltage range of 15%-125%. All types of the above frequency transducers are typically used to monitor and control frequency in such applications as 3 phase mains supplies, A.C. Generating sets and processing control etc.
  3. Generator Protection Relays

    Generator Protection Relays
    Generator Protection Relays supplied by Howard Butler Ltd
  4. Kilowatt Hour Meters

    Kilowatt Hour Meters
    DIN96 kilowatt hour meters for measuring kWh of individual machines or complete systems. Manufactured to BS5685, IEC521 with a class accuracy of 1% to IEC1036, and supplied in a 96 x 96 mm DIN case. The kilowatt hour meter has a 7 digit non resettable mechanical counter. Pulsed output is available to send to PLC's data loggers and computers.Analogue mA output is also available. For monitoring the consumption of electricity in a single or 3 phase system. Savings can made by monitoring and using electricity at the optimum time.
  5. M550 Powercom multifunction transducer complete with RS485 output

    M550 Powercom multifunction transducer complete with RS485 output
    DIN Rail mounting multifunction transducers supplied in 100 x 112mm DIN rail cases. The M550 PowerCom is a complete 1 phase or 3 phase multifunction AC power transducer with RS485 output.
  6. M560 Powersig multifunction transducer complete with 3 analogue outputs

    M560 Powersig multifunction transducer complete with 3 analogue outputs
    DIN Rail mounting multifunction transducers supplied in 100 x 112mm DIN rail cases. The M560 PowerSig is a complete 1 phase or 3 phase multifunction AC power transducer with 3 analogue outputs
  7. M850-LCD Multifunction Meters

    M850-LCD Multifunction Meters
    The new range of Hobut multifunction panel meters feature 96 x 96mm moulded cases and selectable three colour backlight LCD screens. The range is easy to use, features user-programmable CT & VT ratios, and can be used on any single or 3 phase system with any input voltage without re-programming. The range is a cost effective replacement for traditional panel meters and is suitable for low, medium and high voltage control panels, gensets, building management systems, power management and more.
  8. M850 Multi-function Meters

    M850 Multi-function Meters
    The new range of Hobut multifunction panel meters feature 96 x 96mm sizes complete with unique blue LED screen, which can be seen in direct sunlight. The range is easy to use, features user-programmable CT & VT ratios, and can be used on any single or 3 phase system with any input voltage without re-programming. The range is a cost effective replacement for traditional panel meters and is suitable for low, medium, and high voltage control panels, gensets, building management systems, power management and more.
  9. Maximum Demand Indicator

    Maximum Demand Indicator
    D96MD maximum demand indicator, accurate to 3%. 5A CT operated with 1.2 overload scaling to 6A. Available with time lag of 15, 20 or 30 minutes. Range of interchangeable scales available for 5A CT's
  10. Meters - Electrical, Analogue

    Meters - Electrical, Analogue
    Meters - Electrical, Analogue supplied by Howard Butler Ltd