POWER. Sp. z o.o. is a supplier of monitoring and control devices for cast resin and dry-type transformers, which provide essential thermic protection and ensure a long and failure-free service life of your transformer. Our offering includes PWR07 and PWR08 temperature relays, PWR12 fan controlling devices and PT100 temperature sensors.
PWR07 is a microprocessor-based relay designed for temperature monitoring of MV cast resin and dry-type transformers. Equipped with up to 4 PT100 sensors, it can measure and display temperature inside each coil of a three-phase transformer and – optionally – the core or the ambient. PWR07 is easily programmed to take the necessary preventive measures when setpoint temperature thresholds are reached: activate the forced ventilation or alarm, emit a tripping order, as well as report an error. The device is distinguished by a high resistance to electromagnetic interferences.
PWR08 is a relay developed for temperature control of MV cast resin and dry-type transformers via PTC sensors (thermistors). It provides key functionality to prevent overheating of the transformer, i.e. activation of forced ventilation, alarm and tripping, as well as faults reporting. PTC temperature sensors (up to 3 series of 3 sensors for desired temperature thresholds) comply with DIN 44081 and 44082 standards and ensure reliable control of temperature inside the coils.
PWR12 is a controlling device specially dedicated for motors of forced ventilation systems. It diagnoses faults of motors by analysing changes in current consumed by them. Once a fault is detected, the device will signalize it on its display and, optionally, send a signal to a connected alarm system. PWR12 is compatible with temperature relays PWR07 or PWR08 and can be used for switching fans both in automatic and manual mode.
PT100 temperature sensors are known for high accuracy and stability, owed to the properties of platinum, used in their construction. These qualities make PT100 perfect for application in thermic protection of cast resin and dry-type transformers.