Key specifications of a Surge Protective Device (SPD) are designed to identify its capacity to handle overvoltage, its compatibility with electrical systems, and its protective performance level. These specifications ensure the device can adequately protect sensitive equipment from transient surges caused by lightning or switching operations.
Components and Features
- Protective Components: Mostly utilize MOV (metal oxide varistors) or GDT (gas discharge tubes) to manage voltage spikes.
- Status Indicator: Provides a visual indication (e.g., green for normal, red for replacement).
- Remote Signaling: A contact that sends a signal when the device needs to be replaced.
- Pluggable Module: Allows for simple, maintenance-free replacement.
- Installation Method: Usually DIN rail mount for easy installation in distribution boards