Air - conditioning Single Phase Protection Relay , AC DC Under Voltage Monitoring Relay

Air-conditioning Single Phase Voltage Monitoring Relay DIN RAIL Mount

Abrupt changes in the state of the circuit and the electromagnetic state in the power system are the root cause of overvoltage generation. Overvoltage is divided into two categories of external overvoltage and internal overvoltage. Studying the causes of various overvoltages in power systems, predicting their amplitudes, and taking measures to limit them are prerequisites for determining the insulation coordination of power systems, and are of great significance for the manufacture of electrical equipment and the operation of power systems.
Regardless of the external overvoltage or internal overvoltage, it is affected by many random factors. It is necessary to combine the specific conditions of the power system, obtain data through various methods such as calculation, simulation and field measurement, and use probabilistic statistical methods to predict overvoltage.
For the cause of over-voltage, the power system must take protective measures to limit the over-voltage amplitude. Such as the installation of lightning protection lines, lightning arresters, reactors, switch contacts plus parallel resistance, etc., in order to reasonably implement insulation coordination to ensure the safe operation of the power system.

The overvoltage protector is a new type of overvoltage protector, which is mainly used to protect the insulation of generators, transformers, vacuum switches, busbars, motors and other electrical equipment from overvoltage damage.

♦ Features
-- Powered by the measuring circuit
-- Compatible with AC and DC supply
-- Built-in LCD and keypad afford a precise,digital setting
-- Compact modular 43mm housing
-- Adjustable over- and undervoltage threshold
-- Independent adjustable delay time for overvoltage, undervoltage
-- Adjustable reset mode:automatic reset or manual reset
-- 1 CO & 1NC contacts
-- Fault recording with last 3 faults

♦ Protective Functions
-- Overvoltage -- Undervoltage

♦ Typical Applications
• Pumps • Fans • Air-conditioning system
• Blowers • Motors • Compressors • Elevators

Approvals
• CE • CCC

♦ Technical data