ABB keeps the technical documentation of all the links it delivers for the lifetime of the link. In the case of old links where demands have changed over the years, or where similar equipment is no longer available, our engineering departments will work out a new specification. We take pains to ensure that suitable equipment will always be available for delivery to our customers.
In the event of equipment failure, such as circuit boards or other vital devices in the control and valve apparatus, the delivery time of a replacement is critical. ABB Customer Service for HVDC keeps a limited supply of most types of HVDC components.