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G3PX
Operation
J ERROR DETECTING FUNCTION
Wiring
Single-phase Models
All G3PX-jjjEC models incorporate terminals 11 and 12 for
the current transformer (CT Unit), 13 and 14 for the external reset
switch, and 16 and 17 for relay output as well as power/input
terminals 1 through 10.
11
12
13
External reset
switch
14
(See Note 2)
15
Relay output
16
(SPDT)
17
(See Note 3)
Load
Load
Note:
1. Connect either the black or white lead wire of the CT
Unit to terminal 11 and the other lead wire to terminal
12. The G3PX will malfunction if you do not connect
the CT Unit to the G3PX.
2. The rated current and voltage of G3PX models when
reset are as follows:
EC-series models: 1 mA at 12 VDC
3. For more than one heater.
Output
Single-phase Models
The following illustrations show the condition of the G3PX LED indi-
cators when the G3PX detects heater burnout, a short-mode failure
(ON failure of components), or overcurrent (EC-series con-
stant-current models only). The indicator and relay output signals
are reset with the internal or external reset switch provided that the
error condition has been remedied.
1. When EC-series models detect single or multiple heater
burnout, the OPEN indicator is lit and the SPDT relay output is
ON.
Note:
When the G3PX detects heater burnout, the Level indicator
will be OFF regardless of the G3PX input condition. The red
OPEN indicator will be lit.
4
CT Unit
G32X-CTjj
(See Note 1)
CT Unit
Load 1
G3PX-2j0EC
Load 2
2. When EC-series models detect a short-mode failure, the
SHORT indicator is lit and the SPDT relay output is ON.
With continuous load current.
With load current shut off.
Note:
When the G3PX detects a short-mode failure, all LEDs of
the Level indicator and red SHORT indicator are lit. When
you use a breaker to disconnect the load with the relay out-
put, all LEDs of the Level indicator will be OFF regardless of
the input to the G3PX.
3. When EC-series models detect an overcurrent, the Level
indicator will flash and the SPDT relay output is ON. The input
signal will be shut off.
Note:
When resetting, leave power supply terminals 10 to 9 or 8
ON.
G3PX
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