Fuse cut-out with striker VVT-D3 12kV/50A 004232014

Reliable medium voltage protection

VVT-D3 12kV/50A fuse link is an element designed to protect medium voltage (MV) electrical and power equipment against the effects of short circuits and overloads. Using a fuse link ensures reliable disconnection of the circuit in the event of a failure, minimizing the risk of damage and downtime. It is a proven component, particularly recommended for protecting cables, transformers, motors, and capacitor banks.

Construction and operating principle

The VVT-D3 fuse link is characterized by the presence of a thermal trigger, which activates a striker with a force of 80N when the fuse body reaches a temperature of approximately 120°C. This solution is particularly important in SF6 gas switchgear, as the thermal trigger does not react to short-term overloads, but only to dangerous temperature increases. The striker indicates the operation of the fuse link, which facilitates the location and removal of the cause of the failure. Additionally, the high short-circuit breaking capacity of 63kA guarantees effective interruption of the short-circuit current.

Key features and benefits

• High reliability: VV fuse links undergo rigorous type tests conducted by KEMA Labs, which confirms their high quality and compliance with standards.
• Overheat protection: The thermal trigger protects against damage caused by prolonged overload or local overheating of installation elements.
• Effective short-circuit protection: The rated short-circuit breaking capacity of 63kA ensures quick and safe disconnection of the circuit in the event of a short circuit.
• Durable construction: High-strength ceramic tube and galvanically protected contacts ensure long life and resistance to environmental conditions.
• Easy replacement: The improved contact cap facilitates and speeds up the replacement of the fuse link during maintenance or repair.
• Wide range of applications: Suitable for protecting various MV devices, such as transformers, motors, and cables.
• Silver fuse element: Provides optimal conductivity and reliable operation.
• Reliable sealing system: Protects against moisture and corrosion of the internal elements of the fuse link.

It is important to choose the appropriate fuse base – versions without an indicator (VVP) and with an operation indicator (VVP…BSW) are available.