Carbon Brushes And Holders

The range of standard brush holders are very adaptable and lend themselves to both fast and slow moving applications.

Standard construction is brass with copper foil or braid connections (although variations can be requested). Double spring versions and brushes are available where specified.

The range varies from simple calipers and cartridges to advanced fixed box holders with constant force springs and 22KV collectors.

• Single Leg
• Double Leg / Caliper
• Paratec
• Custom / Special
• Power Brush Holders
• Lightning Protection
• Earthing

Single Leg Brush Holder

Designed for use with both fast moving slip rings i.e. Alternators and slip ring motors, and slow moving high current density applications such as cable reeling drums and leisure rides.

Single Leg brush holders are therefore very adaptable and lend themselves to many varied applications. Current ratings are available upon request.

Double Leg Brush Holder

Designed for use with both fast moving slip rings i.e. Alternators and slip ring motors, and slow moving high current density applications such as cable reeling drums and leisure rides.

Similar to the Single Leg, these units are therefore very adaptable and lend themselves to many varied applications. Current ratings are available upon request.

Paratec Brush Holder

Parallel action brush systems provide high contact integrity and system stability for both signal and power applications. The non-metallic body ensures suitability for operation in corrosive environments (such as marine) whilst captive screws improve serviceability.

We now fit this product as standard for specific applications to eliminate the problem of fretting corrosion which can occur with conventional metallic brush holders.

Custom / Special Brush Holder

GOS work closely with global customers to develop more efficient, cost effective brush holder solutions.

Benefits include longer brush life, reduction in service time, improved cooling and minimal brush contact face area by using the optimum brush compound.

The Design Office can help produce any form of brush holder to suit any requirement or application, just send them an email.

Lightning Protection

GOS Lightning Brush holders are robust units that are designed to dissipate lightning energy and thus defend critical components (typically main shaft and yaw bearings).

The 120 amp brush holders, when used as part of a total lightning and surge protection system, play a very important role in the protection of buildings, structures and equipment against direct lightning strikes.

Arc propagation brackets are also available to act as backup for overload conditions.

A low impedance path is created through the rotational interface (hub to nacelle) from the lightning protection conductor to the ground, therefore protecting the main bearing

Earth Cartridge

GOS offer earthing brushes and holders for a range of applications, we can accommodate any size of brush and holder to specifically suit the needs of the customer.

Common issues with earthing brushes relate to ghosting, marking or burning to the slip ring, primarily down to the brushes not being under continued load to build an effective patina. In the worst cases we see grooving appear into the earth ring. This damages the slip ring and in turn increases brush wear. In wind applications the issues can result in the earthing brushes working to a fraction of their expectancy, high voltage spikes caused by back feeds in the grid can then be discharged across bearings, resulting in damage.

GOS grade combats this by giving an excellent uniform patina across the ring, resulting in no burning, marking or ghosting. GOS’s grade works extremely well in a range of atmospheric conditions where wind turbines are commonly exposed to. Because our grade offers much improved brush wear and slip ring wear results, this significantly reduces operation and maintenance costs. In turn main shaft bearings are protected and their life is optimized.