nvent RAYCHEM T2000 User Manual

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Procedure:AdjusttheCIRCUITBREAKERCURRENTRATINGsettingtomatchtheheating
circuit breaker size (i.e. 30.0 A).
IMPORTANT: This feature SHOULD NOT be used to reduce the size of a circuit breaker or
increase the maximum heating cable length. It can be quite effective in preventing nuisance
trips due to incorrect design or factors outside those considered by the design.
3.4.10 MAXIMUM POWER SETTING (SSR ONLY)
Purpose: If a control module is not configured as an ATC SLAVE, this user selectable level
limits the maximum amount of power applied to a heating circuit. This is an average power
calculated by the control module using the average current and applied voltage. The control
module switches the output on and off rapidly to limit the average current to an appropriate
level. The MAXIMUM POWER level may be adjusted to eliminate step-down transformers,
lower the effective output wattage of a cable, or implement energy management of the
heatingcircuit.
Range: 3 to 30,000 watts for CM 2000
3 to 60,000 watts for CM 2000+
(Range depends on VOLTAGE TURNS RATIO)
Procedure: Adjust the MAXIMUM POWER level to the desired value. Use the TEST tracing
function (see Section 4.2.8) to observe the power limiting operation.
IMPORTANT:
• This function may be set within reasonable limits for the particular TRACER being powered.
The effective resolution of the setting is limited to 1/30th of the calculated full on power.
• Do not set the MAXIMUM POWER level below the full output level for applications that do
not require power limiting.
3.4.11 TEMPERATURE SENSOR CONTROL MODE
Purpose: The TS CONTROL MODE allows the selection of one of nine possible temperature
control modes used by the control module. The different modes allow redundant “fail-safe”
temperature sensing, averaging, or minimum maintain temperature control.
Setting: Select one of the following nine possible TS CONTROL MODES:
• CONTROL USING TS 1, FAIL OFF
• CONTROL USING TS 1, FAIL TO TS 2
• CONTROL USING TS 2, FAIL OFF
• CONTROL USING TS 2, FAIL TO TS 1
• CONTROL ON AVERAGE, FAIL OFF
• CONTROL ON AVERAGE, FAIL TO GOOD
• CONTROL ON LOWEST, FAIL OFF
• CONTROL ON LOWEST, FAIL TO GOOD
The ninth TS CONTROL MODE below is only available in control modules with firmware
versions V2.35 or higher, and if the control module is not configured as an ATC MASTER:
• CONTROL AS AN ATC SLAVE
Where ‘FAIL OFF’ = Control module’s output switch will get turned off if the control TS fails.
Example: With a TS CONTROL MODE set as CONTROL ON AVERAGE, FAIL TO GOOD, the
control module will measure both sensors (TS 1 and TS 2), average the two temperature
values, display the results and cycle the heater on or off to maintain the CONTROL SETPOINT
temperature. This is the primary control mode. If either sensor should fail, the control module
willtransfercontroltotheremaining“good”sensorandgeneratetheappropriateTS1orTS2
FAILURE ALARM (assuming the alarm is enabled). The temperature will now be maintained
based on this measured value. If the remaining “good” sensor fails, the control module will
turntheheateroff.Thethree-characterdisplaywillalwaysflash“tSF”andtheappropriateTS1
or TS 2 FAILURE ALARM will be also be generated as well as the Control TS FailURE ALARM
(assuming these alarms are enabled).
Procedure: Select the temperature sensor control mode that best suits the application.

nvent RAYCHEM T2000 Specifications

General

Brand	nvent
Model	RAYCHEM T2000
Category	Controller
Language	English