Non-Failsafe:
The output relay does not change state when control power is applied to terminals N- & L+. When a trip occurs the
N.O. contact is closed and the N.C. contact is opened.
Ground (Earth):
The conductive mass of the earth, at which point all the exposed conductive parts of the system should be bonded
at a conventional voltage value of zero.
Ground Fault:
A ground fault is understood to be an accidental contact between a live conductor at phase potential and ground.
Manual Reset:
A N.O. contact RESET pushbutton located on the relay must be pressed once to reset the output relay after a trip,
providing the ground fault has been cleared.
Pickup Current / Trip Levels:
The value of the zero sequence (fault) current at which the relay is set to trip (the relay contacts change their state).
Time Delay:
Intentional period of time programmed to elapse before the tripping (operation) of the relay. It should not be confused
with the breaking (opening) time of the protection device.
Zero Sequence Current:
A vector summation of all electrical currents in an electrical line. Theoretically in any electrical system the summation
of all the electrical currents is zero. When the resulting summation value is other than zero it is an indication of a
current leakage to ground.
3.2 DIPSWITCH SETTINGS
The DIP switches are mounted inside of the relay and are accessible through the front cover. It is recommended that
all of the DIP switches be set at one time and before energizing the relay.
Changes to the DIP switch settings when the mGARD-100 relay is energized may be performed without having any
adverse effect on the relay. Table 3.0 displays all DIP switch selectable options.
