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.
Filter products and services
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Combined Maximum Demand Indicator
D96CMD 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'sRequest a Quote Supplied by Howard Butler Ltd -
Compact brass ended shunts
Highly accurate manganin resistance d.c shunts. When a current is passed through the shunt a proportional millivolt output is produced. Our special Compact Brass Ended Shunt is often requested for special applications due to its small size. manufactured to BS89/IEC51 class 1 it can be current rated from 5A to 50A, with 25mV, 50mV, 60mV, 75mV or 100mV output.Request a Quote Supplied by Howard Butler Ltd -
Core Balance CTs
A range of moulded case core balance current transformers available with various internal diameters, also referred to as zero phase CTs. The products are compact in design and supplied complete with inbuilt mounting feet. Specifically designed for use with the HOBUT range of Earth Leakage Relays. Specification of tripping current is not required as this is set automatically by the relay.Request a Quote Supplied by Howard Butler Ltd -
CT75 Series 3 Phase Moulded Case Current Transformers
Miniature three phase current transformers suitable for primary ranges from 80-160A with 5A secondary. Supplied with terminal cover and integral foot mount. The products have an overall width of 75mm allowing installation of 75mm allowing installation directly on top of moulded case circuit breakers. They can also be used independantly in 3 phase applications.Request a Quote Supplied by Howard Butler Ltd -
CTH101L Series Moulded Case Current Transformers
A range of compact moulded case current transformers suitable for primary currents up to 4000A with built in terminal covers. For transforming various primary current into 5A or 1A standard secondary using upto 100 x 50mm busbarsRequest a Quote Supplied by Howard Butler Ltd -
Current Transformers
Current Transformers
A range of compact moulded case current transformers suitable for primary currents up to 6000A with built in terminal covers. For transforming various primary current into 5A or 1A standard secondary using upto 127 x 38 or 127 x 54 busbars.
Request a Quote Supplied by Howard Butler Ltd -
Current Transformers with 6.3mm Fast-On Terminals
A range of moulded case current transformers suitable for primary currents from 40A to 4000A complete with 6.3mm fast-on terminals. For transforming various primary currents into 5A standard secondary using various cable primaries. The 6.3mm fast-on terminals allows for fast assembly/connection.Request a Quote Supplied by Howard Butler Ltd -
D96 Power Factor Indicator
Power factor indicator, size D96. For 3 phase, 3 or 4 wire balanced loads (separate transducer required for single phase). Accuracy 1.5%.Request a Quote Supplied by Howard Butler Ltd -
D96 Wattmeter
Watt meter, size D96. Accurate to 1.5%. For 1A or 5A ct operated systems.Request a Quote Supplied by Howard Butler Ltd -
DC Current Or Voltage 1 In 3 Out
The M100-DM3 takes 1 DC Input and provides 3 isolated outputs all directionally proportional to the input. The outputs can all be of the same D.C. Value or can be diffrent. Typically this product is used to prevent earth loops between measuring devices. For example the M100-DM3 could have its input signal provided by a M100-WA4 watt transducer with 4-20mA output. The 3 outputs from the M100-DM3 could be as follows: Output A = 4-20mA fed to a PLC Output B = 0-20mA fed to an analogue meter scaled in kW Output C = 1-5V fed to a chart recorder The isolation between the Input/Output/Case is 1.5kV and the isolation between each output is 500VRequest a Quote Supplied by Howard Butler Ltd
