Shunt resistances

Tinsley Precision Shunt Resistances

DC and Low  Frequency Current Shunts

The air cooled DC Shunts cover a very  wide range of current from
1.5 Amperes to 20,000 Amperes

>> Model: 2276 Very High Current Air Cooled Shunts, Typically 0.1%
>> Model: 4638 Air Cooled Shunts, Typically  0.03%
 >> Model: 4640 Air Cooled Shunts, Typically 1.0 - 0.1%

Current  Shunts Type 2276

The Type 2276 range of high current shunts are specially designed for
use  up to 20,000 Amperes and maybe used on a steady D.C. load
or for pulse work.
Limit of Error:
Under steady condition the Type 2276 shunts keep within 0.1% up to full 
rated current but this figure is greatly improved if forced air is used for 
cooling.

Stability:
The stability of these shunts under steady conditions is 0.01% or better. 
A typical figure, 20000 Ampere shunt was found to be better than 0.005%.
Compensation for Phase Angle Errors:
When used for pulse work, the mutual inductance between the potential
leads  and the current path in the shunt can be set to compensate for the
phase  angle between the current in the shunt and the voltage
between the potential  points.
The self inductance of the current through the shunt depends on the
arrangement  of the bus bars. If the return bus bar is made to follow the
contours of  the shunt and is kept close to it, the value can be kept
to 0.01mH  or less.
Construction:
The construction of the Type 2276 air cooled shunts is similar to the
Type  4638 but they are usually supplied in a steel lifting frame to
facilitate transporting  them without distortion. They are not supplied
on a base nor fitted with a  protecting cover.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/air-cooled-shunts/2276.htm

Air Cooled Shunts Type 4638

The Type 4638 high current air cooled shunts cover the range 1.5 to
2,000  Amperes and were designed to comply with the E.S.M. Act.
Limit of Error:
The Type 4638 shunts having rated values up to 100 Amperes are
calibrated  to maintain resistance within 0.03% for any current up to full
rated current.  Between 100 and 2,000 Amperes they will keep within
0.05% for any current up  to their full rating.

Stability:
The stability of these shunts under steady current conditions is better
than  0.01%. Their stability with time is of the same order.
Thermal Errors:
Errors due to thermal E.M.F.s are less than 0.01% of the Volt drop with
full  rated current; and under zero current conditions will be a few micro
Volts  only.
Construction:
The shunts are constructed of high grade Manganin, the resistive
elements  being solidly soldered to the current terminals and the whole
assembly is mounted  on a strong base and fitted with a protecting cover
which allows the convection  currents to circulate freely and
effect cooling.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/air-cooled-shunts/4638.htm

Air Cooled Shunts Type 4640

The Tinsley 4640 range of Air Cooled, High Current Shunts offers good
accuracy  at low cost.
Available in four resistance values and a range of Full Load operating
currents  from 50 Amperes to 1,000 Amperes. These instruments are
manufactured  from selected Manganin, specially heat treated for low
temperature coefficient  and long term stability. The instruments are
constructed using a non-metallic  base board with the elements protected
by a mesh cover allowing good air flow  to cool the instrument.

 
For prolonged use under full load conditions we recommend forced air
cooling  to preserve best accuracy. These current shunts are designed to
have minimum  inductance and use the four terminal measurement
principal.
They are suitable for use with DC and also AC at power frequencies.
Instruments  are supplied with a Tinsley "In house" calibration certificate.
A Tinsley calibration certificate can be supplied at extra cost.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/air-cooled-shunts/4640.htm

View other products:
www.tinsley.co.uk