Which operation may lead to the need for a PDP tie?

The need for a Power Distribution Panel (PDP) tie typically arises when there is a power loss downstream of the Central Distribution Board (CDB). This scenario indicates that the system is experiencing an issue that could be affecting the continuity of power distribution. A PDP tie serves as an interface that connects different panels to ensure redundancy and reliability in power supply. When a fault or disruption occurs downstream, the PDP tie can help redirect or stabilize the power flow, allowing for continued operation or easier access to perform repairs.

In contrast, the installation of new equipment usually signifies an expansion or enhancement rather than an immediate need for a tie, as it often requires integrating the new equipment without necessarily needing to connect disparate panels. Routine troubleshooting primarily focuses on identifying and resolving issues without implying that there is a failure in the existing distribution system. Transformer testing tends to involve assessments or maintenance tasks on transformers and doesn't inherently create a need for a PDP tie, as it can be executed within normal operational parameters.