Smooth operation of smelting facilities


Electrical Safety - a Hot Topic


The pots in smelting systems in which the metal is melted are operated with various voltages and currents. The supply is often ungrounded. In most systems, the pots must be monitored separately to avoid shutting down the whole plant in the event of a fault. The EDS fault location system is an excellent option here. It quickly and automatically locates defective power circuits.

Low-Voltage Power Distribution

Safe Power for Reliable Results

Low-voltage distribution boards

The power supply is critical to refining and smelting systems. The medium voltage supplied to the facility is transformed down to 480 V or 600 V and distributed through the facility via electrical cables or busbars often referred to as branch feeders. It is then either connected to loads or transformed to lower voltages. Depending on the system grounding either a Bender ISOMETER®s or RCMS residual current monitoring relays (ground-fault monitors) monitor these and help ensure continuous operation. Fault detection is only the first step in troubleshooting. The addition of downstream monitors and current sensors can allow quicker and safer location of ground faults. References mention that approximately 80-95% of the faults in a facility start as a phase-to-ground fault – making this time savings compound the return of investment.

Product overview ISOMETER®
Product overview Power Quality
Technical paper Electrical safety in control and auxiliary circuits
Technical paper Electrical safety in a modern nickel smelting plant

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for permanent monitoring:

Recommended coupling devices:

Analyzing and reporting:

Recommended for resistance grounded systems:

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