Built on the original Brifel and Electroswitch resistor brands, which have a manufacturing history in Australia dating back to the 1950’s, in February 2009 Fortress Systems was purchased by Post Glover Resistors. At the same time, the interlock division of the company was separated out and retained by our previous owners, the Halma Group PLC. Founded in 1893, Post Glover is the leading provider of power resistor products in North America. Fortress Systems is now dedicated to the manufacture of power resistors for all industries.

Resistors are not just a part of our business — resistors are our only business. We are committed to supplying resistors that meet the requirements and specifications requested by our customers. With expert engineering, conscientious personnel and a broad product range, we aim to be your supplier of choice for resistor products. Helping you to complete your projects and meet your deadlines by being quick, responsive and knowledgeable about your applications and the latest requirements of standards and regulations.

Fortress has experience of managing large projects and provides value to customers by ensuring we understand the customer’s requirements and expectations. We place an equal importance on technical capability, manufacturing to deadlines, and providing documentation and drawings in a concise and timely manner.

Neutral Grounding

Neutral Earthing Resistors (NERs) – sometimes called Neutral Grounding Resistors – are employed in AC distribution networks to limit the current that would flow through the neutral point of a transformer or generator in the event of an earth fault. NERs limit fault currents to a value that does not cause any further damage to switchgear, generators or transformers beyond what has already been caused by the fault itself, and in some cases limit touch and step potentials to safer values than a solidly grounded systems.

Dynamic Braking

Dynamic braking resistors dissipate braking energy for overhauling loads or stopping conditions for AC electric motors.

Motor Control

Motor starting and speed control for material handling and crane applications.

Load Banks

Stationary convection or fan cooled load banks based on our advanced element design allows more kW in a smaller package.

Harmonic Filters

Custom designed harmonic filtering resistors for your industrial and utility applications.