Hyundai HG Series Manual page 13

Controls and Settings
Trip Cause Indicator
Cause of Event Indicator Code
Overcurrent
oc
(Definite time)
Overcurrent
oc
(Inverse time)
Lock Loc
Stall StL
Phase Failure PF
Phase Unbalance Ub
Reverse Phase rP
Undercurrent Uc
Earth Leakage (ZCT) gF
Ground Fault (NCT) gF
Instantaneous Sc
※ The current value at the time of the trip can be identified by pressing the
Checking the Recent Event History
A maximum of five trip information and corresponding current value can be verified.
1. Press and hold the button while the current value is shown
on the display (both while motor is operating or offline) to check
the immediately preceding trip item and current information at
time of trip.
2. The previous trip information will flash on the display.
3. Pressing the , buttons at this time will indicate the current
value at moment of event for all R, S and T phases. Respective
current values are displayed for earth leakage or ground failure.
Code Displayed
Under definite time characteristics, trip occurs when current exceeds 112.5 % of set rated
current.
Under inverse time characteristics, trip occurs when current exceeds set rated current.
Reset cannot be carried out when the motor has tripped under thermal inverse time in
order to protect the motor; and reset is possible after a certain span of time has elapsed
after the trip. Forcing a reset may cause damage to the motor.
Current in excess of the rated current protection factor (200 to 1,000 % of rated current)
parameters (limited to overcurrent definite time characteristics)
Current in excess of the rated current protection factor (150 to 700 % of rated current)
parameters (limited to overcurrent definite time characteristics)
Difference between minimum and maximum current between three phases in excess of
70 %
Difference between minimum and maximum current between three phases exceeds
parameters (10 to 70 %)
Detection of phase reversal during motor startup
Current flow under rated current factor (30 to 70 % of rated current) parameters
Current in excess of earth leakage current parameters
Current in excess of ground fault current parameters
Current in excess of the rated current protection factor (600 to 1,500 % of rated current)
parameters
, directional buttons while the trip cause indicator is displayed.
4. Press the "Set" button to check the past events of failure in
5. Pressing the TEST/RESET button in the previous event
Electronic Motor Protection Relays
Details
reverse chronological order. The closer to the left of the load
factor graph, the more recent the events are.
▶ The events are marked on the first
through fifth bars of the graph from the
latest to the earliest.
information screen will restore the display to the normal
operational mode.
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