Voltage monitoring relays, also known as under-voltage (UV) and over-voltage (OV) monitoring relays, are devices used to monitor electrical systems and protect equipment from voltage-related issues. These relays continuously measure the voltage levels in an electrical circuit and activate when the voltage goes below (under-voltage) or above (over-voltage) preset thresholds.

Here’s a brief overview of UV and OV monitoring relays:

  1. Under-Voltage (UV) Monitoring Relays: These relays are designed to detect when the voltage in an electrical system falls below a certain threshold. When the voltage drops below the predetermined level, the UV relay is triggered and can perform various actions, such as signaling an alarm, shutting down specific equipment, or initiating corrective measures to prevent damage to sensitive devices.
  2. Over-Voltage (OV) Monitoring Relays: Conversely, OV monitoring relays are set to monitor voltage levels above a predefined threshold. When the voltage exceeds this preset limit, the OV relay activates, triggering protective measures like disconnecting the power supply, tripping circuit breakers, or sending alerts to prevent damage to connected equipment.

These relays are crucial in various industries and applications where maintaining stable voltage levels is essential for the safe and proper functioning of electrical systems. They help prevent equipment failure, protect against overloads, safeguard sensitive electronics, and ensure operational safety.

UV/OV monitoring relays are commonly used in industries such as manufacturing, power distribution, renewable energy systems (like solar and wind), industrial automation, and wherever precise voltage control and protection are required.