Suojausparisto

Suojausparisto is a Finnish term used in electrical engineering to denote a protective battery system. It can refer to a battery bank and the associated control and power electronics that supply backup power to safety-critical circuits or protective functions during main power loss. In practice, suojusparisto may serve as energy storage for emergency shut-down systems, fault indication, monitoring, and protection relays, ensuring that essential safety operations remain operable for a finite period.

Components typically include a battery unit (lead-acid, Li-ion, or other chemistries), a charging/discharging controller or battery management system, power conversion hardware such as inverters or DC-DC converters, protective devices (fuses, circuit breakers), and monitoring/communication interfaces.

Operation: When the main supply fails or voltage drops outside safe limits, the suojusparisto supplies power to designated circuits. The control system triggers protective actions, logs events, and may coordinate automatic shutdowns, alarms, or fault isolation. Design emphasizes reliability, battery health management, adequate backup time, thermal management, and safe handling and disposal.

Applications: industrial automation, railway and public transport systems, process industries with mandatory safety interlocks, emergency lighting in facilities, and safety-critical control cabinets.

Safety and standards: Installations follow local electrical codes and safety standards; maintain proper ventilation and battery management; regular testing, inspection, and replacement according to manufacturer guidelines.

See also: backup power supply, uninterruptible power supply, battery management system, emergency power.