GTMA member Helander, a Calder
Group Company, manufactures
mission-critical components, kits
and assemblies for the Nuclear and
Oil & Gas sectors.
In Nuclear operations, it has built a
successful track record over 15 years
and supplies products in compliance
with stringent Nuclear safety class 1
requirements. The scope of work
undertaken covers a wide range of decommissioning and life-extension
projects, and the company is also part of
the Fit-for-Nuclear (F4H) programme in
readiness to support the UK nuclear
new build programme. In the Oil & Gas
arena, Helander has over 35 years of
expertise in the directional drilling sector,
and has particular skills in making critical
and complicated parts from very difficult
The company, with some 100 talented
engineering staff at its modern facilities in
Tewkesbury, has comprehensive (30
machines) in-house CNC manufacturing
facilities for parts ranging from 3mm to
3m in size. It also acts as an Integrator
by managing an approved supply chain
for added value processes thereby providing a full turnkey
GTMA member Ringspann is a solutions
provider for industrial and renewable
energy systems and among other projects has been the design of a cost
effective technical solution for a high
voltage switch application where there
had been significant problems. Ringspann designed the solution for a world
leading manufacturer of High Voltage
The project involved the way contacts in a
high voltage switch system must be opened
in a few milliseconds to switch off an electric
current. If it takes longer an electric arc is
produced which burns out the contacts and
this leads to costly downtime for the
provider - and misery for the consumer.
The high force needed for such a short
switching time is provided by an accumulator
spring which is pre-loaded and activates
when a detent latch holding the contacts in
place is opened.
Previously a reduction gearbox connected
to an electric motor was used to pre-load
the accumulator spring between switching
cycles, but this was expensive because of
initial outlay and running costs.
Ringspann's solution uses a lower power
motor with a cam and a special double
freewheel incorporating an indexing freewheel (which operates
with the cam to preload the spring) and a backstop
(to prevent the crank from running backwards
and damaging the spring).
The end result is lower running costs of the
smaller motor (the freewheels are more efficient than the reduction
the motor can be downsized) and a lower
initial outlay as the freewheel solution is
much more cost effective than a reduction gearbox.
Innovative achievements like this have
made Ringspann one of the world's
leading manufacturers of power transmission products
to international markets
with a product portfolio consisting of
freewheels, brakes, shaft-hub connections, torque
limiters and couplings.
WORLD LEADER FINDS
THE RIGHT TECHNICAL SOLUTION
'GOING THE EXTRA MILE'
With a turnover of around £16 million
Helander is experiencing high growth and is
also a leading supplier to the aerospace
and defence sectors. It is proud to hold the
aerospace sector SC21 Bronze award in
recognition of its high levels of customer
service in terms of quality and delivery performance, and is also ISO9001 accredited.
Going the 'extra mile' Helander welcomes
the opportunity to advise customers at an
earlier stage with assistance in 'design for
manufacture' which often leads to 'costdown' and 'performance-up' gains.