GE Industrial Solutions MicroVersaTrip PM - Manual (Page 31)

MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 2. Setup Mode
21
Figure 32. Trip Unit display for undervoltage relay zero-volt trip
enabled.
Undervoltage Relay Delay
This function sets the delay time before an under-
voltage trip occurs. The range of delays is 1 to 15
seconds, in steps of 1 second. Choosing
OFF disables
undervoltage protection. The Trip Unit display is
shown in Figure 33.
Figure 33. Trip Unit display for undervoltage relay delay.
Overvoltage Relay Pickup
This function measures the true rms voltage in all
phases and initiates a trip if any phase voltage
exceeds the set point. The range of set points is 110
to 150% of the nominal voltage, with an increment
of 1%. The Trip Unit display is shown in Figure 34.
Figure 34. Trip Unit display for overvoltage relay pickup.
Overvoltage Relay Delay
This function sets the delay time before an overvolt-
age trip occurs. The range of delays is 1 to 15 sec-
onds, in steps of 1 second. Choosing
OFF disables
overvoltage protection. The Trip Unit display is
shown in Figure 35.
Figure 35. Trip Unit display for overvoltage relay delay.
Power-Reversal Relay Pickup
This function measures the direction of power flow
through the breaker and initiates a trip if a sufficient
magnitude of reverse power is detected. The range of
set points is 10 kW to 990 kW, in steps of 10 kW. The
Trip Unit display is shown in Figure 36.
Figure 36. Trip Unit display for power-reversal relay pickup.
Power Direction Setup
This function selects the normal power flow direc-
tion for the breaker, either from line to load or from
load to line. Figure 37 shows the setup display for
normal power flow of line to load. This direction
setup also affects the sign of the normal power
metering displays.
Figure 37. Trip Unit display for power direction setup, showing
line to load.
Power-Reversal Relay Delay
This function sets the delay time before a power-
reversal trip occurs. The range of delays is 1 to 15
seconds, in steps of 1 second. Choosing
OFF disables