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Noise and Surge Effects
If noise or an electrical surge occurs that exceeds the malfunction
withstand limit for the G3PE output circuit, the output will turn ON for
a maximum of one half cycle to absorb the noise or surge. Confirm
that turning the output ON for a half cycle will not cause a problem for
the device or system in which the G3PE is being used prior to actual
use. The G3PE malfunction withstand limit is shown below.
• Malfunction withstand limit (reference value): 500 V
Note: This value was measured under the following conditions.
Noise duration: 100 ns and 1 µs
Repetition period: 100 Hz
Noise application time: 3 min
Mounting to Control Panel
The G3PE is heavy. Firmly mount the DIN track and secure both ends
with End Plates for DIN-track-mounting models. When mounting the
G3PE directly to a panel, firmly secure it to the panel.
If the panel is airtight, heat from the SSR will build up inside, which
may reduce the current carry ability of the SSR or adversely affect
other electrical devices.
SSR Mounting Pitch (Panel Mounting)
10 mm min.
SSR
Mounting direction
Vertical Direction
Host and slave
80 mm min.
Relationship between the G3PE and ducts or
other objects blocking airflow
Incorrect Example
Countermeasure 1
Duct or other object
50 mm max.
blocking airflow
Duct
Vertical
Direction
SSR
Duct
If the depth direction of
Use ducts that have a
the G3PE is obstructed by
shallow depth, to provide
ducts, the heat radiation
a sufficient ventilation
will be adversely affected.
area.
Duct or other object blocking airflow
Between duct and
G3PE
60 mm min.
Between duct and
G3PE
30 mm min.
Countermeasure 2
Duct
(No more
than 1/2
the G3PE
depth is
recom-
Airflow
mended.)
Base
SSR
Duct
Duct
If the ducts cannot be made
lower, place the G3PE on a
metal base so that it is not
surrounded by the ducts.
Ventilation Outside the Control Panel
Duct or other object blocking airflow
SSR
Air inlet
Note: 1. If the air inlet or air outlet has a filter, clean the filter regularly
to prevent it from clogging to ensure an efficient flow of air.
2. Do not locate any objects around the air inlet or air outlet,
otherwise the objects may obstruct the proper ventilation of
the control panel.
3. A heat exchanger, if used, should be located in front of the
G3PE to ensure the efficiency of the heat exchanger.
G3PE Ambient Temperature
The rated current of the G3PE is measured at an ambient
temperature of 40°C.
The G3PE uses a semiconductor to switch the load. This causes the
temperature inside the control panel to increase due to heating
resulting from the flow of electrical current through the load. G3PE
reliability can be increased by adding a ventilation fan to the control
panel to dispel this heat, thus lowering the ambient temperature of the
G3PE.
(Arrhenius's law suggests that life expectancy is doubled by each
10°C reduction in ambient temperature.)
SSR rated current (A)
Required number of
fans per SSR
Example: For 10 G3PE SSRs with load currents of 15 A,
0.23 × 10 = 2.3
Thus, 3 fans would be required.
Note: 1. Size of fans: 92 mm × 92 mm, Air volume: 0.7 m
Ambient temperature of control panel: 30°C
2. If there are other instruments that generate heat in the
control panel in addition to SSRs, more ventilation will be
required.
3. Ambient temperature: The temperature that will allow the
SSR to cool by convection or other means.
SSR
Be aware of airflow
Ventilation
outlet
(Axial Fan)
SSR
15 A
25 A
35 A
0.23
0.39
0.54
G3PE
SSR
45 A
0.70
3
/min,
7
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