J Troubleshooting - Omron G3PX EUN Series Manual

G3PX
J WIRING
Make sure that the lead wires are thick enough according to the cur-
rent.
Be sure to turn off power to the G3PX when wiring. The G3PX has
current leakage although the G3PX is turned off if the power supply
is connected to the G3PX, which may give an electric shock.
Do not wire power lines or high-tension lines along with the lines of
the G3PX in the same conduit, otherwise the G3PX may be dam-
aged or malfunction due to induction. Be sure to wire the lines of the
G3PX separated from power lines or high-tension lines or laid in an
exclusive, shielded conduit.
J TIGHTENING TORQUE
Apply the following tightening torque.
Output terminal:
20-A model: 1.47 N S m
40-A model: 2.45 N S m
60-A model: 4.12 N S m
Terminal block:
Single-phase model: 0.98 N S m
Be sure to protect the terminals with the protective cover after
wiring.
J WIRING FOR ERROR DETECTION
If a contactor is used with the relay output signal of the G3PX for
error detection, make sure that the G3PX is closer to the power
supply than the contactor.
Instruments
Instrument
Thermal type
Digital type displaying
root-mean-square values
Moving-iron type
Rectifier type
Multimeter
Digital multimeter
The instruments are used for displaying room-mean-square
voltage and current values of the AC circuitry.
J OPERATION MONITORING
The level indicator just indicates the phase of the load and it is
not highly precise.
J RAMP SETTING
There is a decrease in ramp if the internal DUTY adjuster is
turned counterclockwise.
DUTY
100%
If the External DUTY Adjuster is used, set the Internal DUTY
Adjuster to 100%.
12
Remarks
Available
Not available (not (
precise enough) i h)
DUTY
10%
J CURRENT TRANSFORMER UNIT
Use only G32X-CTjjC CT Units in combination with
G3PX-2j0EC Series power controllers
If G3PX-20EC Series (constant current) model is used and the
actual load current is 50% of the maximum rated load current or
lower, increase the number of turns of the wire around the CT
Unit.
For example, make two turns if the actual load current is 50% of the
maximum rated load current and four turns if the actual load current
is 25% of the maximum rated load current.
If the G3PX is a constant current model, do not increase the number
of turns of the wire around the CT Unit excessively, otherwise the
overcurrent detection function may operate by mistake.
J BASE-UP FUNCTION
If a G3PX-EUN model is used, the base-up function is available.
The base-up output of the G3PX with a temperature controller
output of 0 mA (i.e., the temperature controller is turned off) and
that of the G3PX with a temperature controller output of 4 mA are
different from each other.
J POWER DEVICE CARTRIDGE
Do not apply power to the G3PX with the Power Device Cartridge
dismounted.
J OTHERS
Do not use three single-phase models for three-phase load
control.
If three-phase power supply is used for single-phase models
operating in parallel, make sure that the two phases supplied to
all the single-phase models are the same.

J TROUBLESHOOTING

Check the following if the G3PX does not operate or has difficulty
in temperature control.
•
The load does not turn on with 100% input.
Check the default internal ramp setting.
Make sure that the adjust-
er is set to the farthest
clockwise position.
DUTY
Also check the current limit adjuster if the G3PX is a constant DC
model.
CUR LIM
G3PX