— To safeguard against the installation of a relay without any entered settings, the unit does not allow
signaling of any output relay until
UNIT NOT PROGRAMMED self-test error message displays until the relay is put into the "Programmed" state.
— This setting allows the user to uniquely identify a relay. This name appears on generated reports.
5.4 Remote resources
5.4.1 Remote resources configuration
When the L90 is ordered with a process card module as a part of HardFiber system, an additional Remote Resources
menu tree is available in the EnerVista software to allow configuration of the HardFiber system.
The remote resources settings configure a L90 with a process bus module to work with HardFiber Bricks. Remote resources
configuration is only available through the EnerVista software, and is not available through the L90 front panel. A Brick
provides eight AC measurements, along with contact inputs, DC analog inputs, and contact outputs, to be the remote
interface to field equipment such as circuit breakers and transformers. The L90 with a process bus module has access to
all of the capabilities of up to eight Bricks. Remote resources settings configure the point-to-point connection between
specific fiber optic ports on the L90 process card and specific Brick. The relay is then configured to measure specific
currents, voltages and contact inputs from those Bricks, and to control specific outputs.
The configuration process for remote resources is straightforward and consists of the following steps.
Configure the field units. This establishes the point-to-point connection between a specific port on the relay process
bus module, and a specific digital core on a specific Brick. This is a necessary first step in configuring a process bus
Configure the AC banks. This sets the primary and secondary quantities and connections for currents and voltages. AC
bank configuration also provides a provision for redundant measurements for currents and voltages, a powerful
reliability improvement possible with process bus.
Configure signal sources. This functionality of the L90 has not changed other than the requirement to use currents
and voltages established by AC bank configuration under the remote resources menu.
Configure field contact inputs, field contact outputs, RTDs, and transducers as required for the application's
functionality. These inputs and outputs are the physical interface to circuit breakers, transformers, and other
is set to "Programmed." This setting is "Not Programmed" by default. The
Figure 5-61: Remote Resources configuration menu
Range: up to 20 alphanumeric characters
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS