How the Phase failure ,Overvoltage and under voltage function works on RM22TR33 relay.
Example :
At 415V, Tt = 30s
>U = 30% (30% of 415V)
<U = -30% (-30% of 415V)
Phase failure + Sequence of phase L1/L2/L3
During phase loss, where the L1/L2/L3 voltage drop to 0V or open circuit. The output relays of the product will trip immediately.
The relay trip immediately as well when one of the 3 phase voltages drop to 30% below Un.
Overvoltage and undervoltage
The product initiate Tt timing when the L1 or L2 or L3 voltage increase/decrease slowly above/below the >U / <U threshold level.
Phase failure and phase sequence are critical failure, therefore the product trip immediately to prevent other equipment failure. For non-critical failure, for example the overvoltage/undervoltage. End user can configure the require Tt timing
At 415V, Tt = 30s
>U = 30% (30% of 415V)
<U = -30% (-30% of 415V)
Phase failure + Sequence of phase L1/L2/L3
During phase loss, where the L1/L2/L3 voltage drop to 0V or open circuit. The output relays of the product will trip immediately.
The relay trip immediately as well when one of the 3 phase voltages drop to 30% below Un.
Overvoltage and undervoltage
The product initiate Tt timing when the L1 or L2 or L3 voltage increase/decrease slowly above/below the >U / <U threshold level.
Phase failure and phase sequence are critical failure, therefore the product trip immediately to prevent other equipment failure. For non-critical failure, for example the overvoltage/undervoltage. End user can configure the require Tt timing
Released for: Schneider Electric India
