Control, Protection and Metering

Along with field-proven conventional control and metering systems, Fuji Electric offers advanced SCADA (supervisory control and data acquisition) systems and associated HMI (human machine interface) systems.

Fuji Electric can offer its own MICREX series PLC system, but if the customer desires, a different internationally-renowned PLC system and personal computer system can be supplied.

As to the protection system, an advanced digital relay system can be supplied on request as well as the conventional relay protection system.

Table 2 shows the typical alarm items of Fuji S-Former.
Table 2 Typical alarm items

For Transformer

Description	Action
Oil Overheat	A
Winding Overheat(*)	A
Oil Level Low	A
Oil Flow Low	T
Buchholtz Relay, Gas	A
Buchholtz Relay, Oil Pressure	T
Oil Pressure Relief	T
Cooling Fan Failure	A
Cooling Water Flow Low	A

For Rectifier

Description	Action
DIW Overheat	T
DIW Level Low	A
DIW Flow Low	T
DIW High Conductivity	A
Diode (Thyristor) Failure	AorT
Opening of Rectifier Enclosure Door	T
Cooling Fan Failure	A
Cooling Water Flow Low	A