nVent RAYCHEM Elexant 4010i/4020i User Manual
RAYCHEM-AR-H60624-40X0iOpsManual-EN-1905
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3.2.1.9 Failure Alarm Settings
a. Enable
Purpose:
This parameter is used to enable the controller to indicate when the unit is unable to measure a
valid temperature due to a sensor open or short circuit condition. See Section 3.5 for more details.
TS1 Default
: Enabled
TS2 Default
: Disabled
TS3 Default
: Disabled
b. Latch
Purpose:
This parameter is used to configure the latching behavior of the Failure Alarm indicator.
TS1 Default
: Enabled
TS2 Default
: Enabled
TS3 Default
: Enabled
3.2.1.10 Control Temperature Fail Mode (Default settings: Fail Off)
Purpose:
In the event that the controller cannot read a valid temperature from any of its control temperature
inputs, the output state of the controller can be configured for one of the following modes:
Mode
Description
Off
The controller output remains off until at least one valid control temperature reading is restored.
On
The controller output remains on until at least one valid control temperature reading is restored.
Fixed%
The controller output is held at a fixed duty cycle until at least one valid control temperature reading
is restored. When this mode is selected an additional control will appear to allow the user to enter
the desired duty cycle, as shown in Section 5.4.3
Last%
The controller output is held at the same duty cycle that existed at the moment of the failure. This
state continues until at least one valid control temperature reading is restored.
Table 6- Control Temperature Fail Modes
3.2.2 Electrical
This section describes the electrical setting options for the Elexant 4010i/4020i modules.
3.2.2.1 Trace Current
Trace current represents the load current in the EHT circuit.
Trace current can be inferred from Line Current and Heater Configuration. For single phase loads, the line
current is equal to the trace current. For 3-phase loads, the Line Current is the current flowing through the
ungrounded load conductors. All three line currents are monitored when using a 3-phase variant of the
Elexant 4020i.
3.2.2.2 Current Turns Ratio
The controller also allows the user to adjust the Current Turns Ratio for applications where a control
module is monitoring a load through an external step-up or step-down current transformer. The ratio
is multiplied with the actual current measured to display the adjusted reading to the user. See Section
5.8.1.2 for more details.
3.2.2.3 Ground Fault Current
Purpose:
Ground fault is an inadvertent connection between an energized conductor and ground, and
may create a hazardous condition. These types of faults may be due to incorrect installation, damaged
system components/insulation, ingress or moisture or other factors. If the Elexant 4010i/4020i controller
detects any leakage currents (ground faults) in the load, it will indicate the level in milliamps.
If a ground fault condition is detected upon start-up of a new installation, it is likely due to a wiring error
or damaged cable. To verify this condition:
