At the heart of the product is a 3 kW DC to DC converter, based around a switch mode push-pull topology operating at a switching frequency of 20 kHz. Very high availability is achieved through a unique method of duplicating strategic circuits. Additionally, the design has a low component complexity and is modular in construction to minimise repair time. Two power units operate independently - both capable of the total output current, but only supplying half the current in a normal configuration. A unique switching unit allows safe access to the depowered unit for any maintenance.
All control is carried out from the front panel.
Consisting of an ergonomically designed membrane containing tactile keys and a 10.4 inch thick film transistor TFT display, it invites the user to operate the equipment through its use of a carefully designed graphical interface with a simple to understand menuing structure. Control of voltage, current, ramping, alarms, polarity, routing and many other features are available. The equipment is designed to power into a cable system, however a variable test load is incorporated to enable testing without access to the cable. The load can be varied over the full range of the power feed. The unit is housed in a separate cubicle together with facilities for terminating optical fibre cables and monitoring system and station earths.