Setting Guide EOCR
Setting Guide EOCR
Setting Guide EOCR
Basic model (3DM / FDM) It means under current (Dry Run) protection, If a level
Password input is necessary to chage the setting value of switch has a problem in a submersible pump, It backs up
EOCR, if a password is memorized except 000. the level switch function from no water running of pump
If the password is set to 000, no password input is necessary and protect the motor from overheating. For the
in “000” to enter the setting change mode. Please take machinery running with a belt (including conveyer), It
caution not to forget the password.No password function is candetect a broken belt. The current setting should be
provided in 3DM2/FDM2, 3MZ2/FMZ2. higher than rating no load current of motor for this function.
The default setting is “oFF” .
The default setting is a 3phase motor. The setting change
to is necessary for 1 phase motor. It is “uc” trip delay time setting . If you don’t set the “uc”
function (uc:oFF), “ut” setting doesn’t appear at the menu.
Time current characteristic (TCC). the defaut setting is
tcc : dE (definite TCC). This memu is to determine “enable/disable” of PL (Phase
loss) funnction. If you set “Ph:1Ph” at the power phase
The default setting is “non”, setting value is the primary selection menu for a single phase power supply line, this
current with an external CT combination in this mode. menu doesn’t appear automatically.
( Ex: in case of 200; 5, the setting is 200 )
It is trip delay time setting for PL. The default setting is 2
If the control power or EOCR itself has a problem, the sec. For single phase power line setting, it doesn’t appear
motor stops with the output relay trip in the “FS: on” mode. at the munu.
The default setting is.
EOCR calculates the unbalance rate among three
For the application which motor rotation direction is phase currents. It trips after “Ubt” setting time under a
important , “rP: on” should be set . unbalanced condition. The default setting is “oFF”.
“rP:oFF” setting doesn’t make a problem after completion
of the installation for the permanent stable application. Locked Rotor protection during starting up a motor (Stall).
The default setting is “rP:oFF”. If a rotor of motor is locked during starting and keep the
current at higher than the “Sc” setting during D-time,
It is recommended for “oc” to set at the rating current of EOCR trips in 0.5sec after D-time. The default setting is
motor. Default setting is oc:5.0A . “Sc: 4”.
The setting value is a multiple of “oc” setting value. This
It means a starting delay time setting for a motor start up function operates under the Definite TCC condition.
duration from the start of motor to the normal running It is disabled under the Inverse TCC setting generally. But
current. The start up duration depends on the inertia of if you set D-time greater than zero in Inverse setting, Stall
load. Therefore, it is recommended to set the time after operates when d-time expires.
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EOCR Setting Guide
Electrical Reset . EOCR resets by power cycle Short Circuit trip delay time during motor starting to
of control power or ESC button. It can be used prevent a trip caused by starting current.”OFF” setting is
for a remote reset which enables EOCR to reset possible .
from a remote site.
Additional Menu (i3MZ/iFMZ, 3MZ2/FMZ2)
Hand Reset (Manual Reset). EOCR can be
Earth leakage protection current setting. The default
reset by ESC button only.
setting is 0.5A. Minimum setting value is recommeded, if
there is no leakage current in the motor by the current
Auto Reset . The time setting range is up to 20
display. If the display shows a leakage current more than
minutes (20n). The auto reset number. of times
50mA, user must check the insulation of motor and line. In
is connected to the restart limitation setting
the case of installing EOCR at the secondary side of
menu. If the number of restrat over the restart
Inverter, it’s better to take care of EOCR opreration error
limitation number. in the “rn” setting menu
due to harmonics of Inverter.
during 30 minutes, EOCR doesn’t reset
anymore.
Earth leakage trip time. The default setting is “0.05sec”.
It is recommended to set the faster time and lower current
Restart limitation number. It prevent a motor from a
than the earth fault protection relay in the upper power
burning fail caused by many restarts during 30 minutes.
system.
In case an emergency restart is necessary, put the setting
at “OFF” This function activates in Auto-Reset mode only.
Earth leakage trip delay time during motor starting to
prevent a trip caused by a stray current and harmonics of
Modbus slave (ID) address. It can be set at No. 1 ~ 247.
the starting current in motor.
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Troubleshooting Guide
Troubleshooting Guide
1. Reversed phase :
It trips instantly within 0.15sec from the motor starting. Check the 7. Current unbalance :
phase sequence and cable direction of the power Ideally, the motor currents of three phases are balanced. If a current
line going to the motor first. The sequence of EOCR internal CT is unbalance is high, the motor need to be checked.
A(L1), B(L2), C(L3) from the left side. If the passing order of motor The formula is as follows.
line to the EOCR doesn’t coincide with the order of EOCR CT or not Unbalance factor (%) = (Imax phase - Imin_phase) / Imax_phase × 100%
same all the direction of cables, It trips by RP. In this case, change
the order of the two cables among three. When the sequence of 8. Jam :
cables to the motor changes in the downstrenm side of EOCR , Rapid overload protection during motor running, Check the load
EOCR isn’t able to check the RP. The sequence of cables should be which cause impacts it. If you find no problem in the load and motor,
coincided from the power mains to the motor. If the RP is not an try to chage the setting value higher of the time and current to be
indispensable function or only necessary for the first installation and appropriate for the application.
fixed in the site, The setting is recommended for normal
operation. 9. Unable to reset :
If you cannot reset EOCR by control power interruption, Check the
2. Overcurrent : reset type setting first. In the setting of
Overcurrent trip displays the biggest current among three phases User can reset EOCR by ECS button only. If you want to reset
and the small LED in the left side shows the phase. EOCR by both control power cycle and ECS button, Put the setting
If the trip current is lower than the rating current of motor, check the at
“oc” setting if it is too low. The recommended “oc” setting is
110%~120% of actual running current in the definite TCC.
3. Stall :
When the starting current doesn’t go down below the “Sc” setting
during D-time. EOCR trips by Stall within 0.5se when D-time expires.
Check the status of load and D-time, whether the D-time is too short
or not. The recommended D-time is longer by 1sec than a time that
the motor come to the normal running current .
4. Phase loss :
The small LED in the left side lights up and designates which phase
is lost in the display like as PL - r, PL - S, PL - t,
To check the PL status, put the PL trip time at the maximum and
measure the lost phase current by a clamp meter after a test start,
whether there is a current in the motor line or not. The minimum
operating current (min setting current) of motor sensed by EOCR
can make trip due to hunting current. Need to check load operation
condition of the application in this case. If the clamp meter shows a
normal current in the lost phase line, Check the EOCR status.
5. Unable to starting :
Even though the sequence wiring is O.K. If the motor is not able to
be started with no magnetic contactor energized, Check the Fail
Safe menu of with the output contact status
(NO, NC) of EOCR .
6. Undercurrent :
Undercurrent trip displays the lowest current among three phases
and the small LED in the left side shows the phase.
The example shows the sensing current of 1.6A in L2(S) phase. For
the heater line broken detection in a heater application. EOCR trips
by undercurrent according to the setting in delta connection, and
trips by phase loss in Star connection.
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