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ITVC Series Intelligent Total Valve Controller Annex B: Gas Over Oil actuator with ITVC Line Break Line Break Line Break-differential Document Number Prepared Approved Date Release IOM-ITVC-LB 10/02/2016...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 DVG ITVC Series – “Intelligent Total Valve Controller” ANNEX B: Line Break and Line Break-differential Introduction ............................5 Line Break protection system ........................ 6 Line Break (LB) ............................6 Operating mode ........................... 7 Enable/Disable Valve Control......................8 Working parameters ........................8 Acquisition + Valve Control operating mode ................. 9 Remote signalling .........................
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ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 LB-d Enable / Disable ........................22 LB-d parameters ..........................23 Battery option ............................. 24 Setting options in the ADMINISTRATOR menu ................25 Troubleshooting ..........................26 Start-up............................... 27 LB start-up ...........................27 LB-d start-up..........................27 Installation and Maintenance ......................27 WARRANTY ..............................
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 1 Introduction This document, ITVC Annex B contains the information to set and use the Line Break function of the ITVC Intelligent Total valve Controller. It is supplied to the user together with the manual...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 2 Line Break protection system It is a system to be installed at a pipeline site to monitor the pipeline integrity and prevent dangerous conditions due to abnormal pressures or pressure changes. Basically it is made of pressure transmitters, actuator, process valve and ITVC logic solver.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.1 Operating mode Three operating modes are available: Acquisition : the ITVC Line Break does not carry out any action to stroke the process valve, the Valve Control is off and forced to “Disable”. The icon in the...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.2 Enable/Disable Valve Control If the operating mode is “Acquisition + Valve Control”, the option “Enable” = ON = “ “ in the Line Break menu page, enables the ITVC to perform the Valve Control (if a Pressure event occurs). The icon...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 Maximum pressure decrease: it sets the allowable maximum decrease in pressure / hour. The parameter can be inhibited by the option “available/not available” in the setting procedure. If the measured “pressure decrease / hour”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.6 Local signalling In “Acquisition” and “Monitor” operating modes, the HOME page of the display shows the icon In “Acquisition + Valve Control” mode and Disable = , the HOME page of the display shows the icon In “Acquisition + Valve Control”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.10 Diagnostics 3.10.1 CPU diagnostics Diagnostics processed by each CPU includes: Diagnostics of comparison between the two CPUs, Software flow diagnostics, Watchdog, System clock monitor and Detection of a fault not imputable to an identified channel:...
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ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 Continuous comparison and voting for 1oo2, 1oo3 2oo3 architectures After A/D conversion, if a single signal deviation is more than 5% compared to the reading of each remaining signal, both CPU’s assume that: ...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.11 LB menu in the ITVC HMI The procedures to view the instantaneous values of the pressure transmitters, the historical data and the alarms are described in the paragraphs “Visualization of pressures”, “Instantaneous measures sub-menu”, “Historical data sub-menu”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.11.1 Enable / Disable Valve Control Enable: if a “Pressure event” occurs and lasts for the time “Delay action”, the ITVC energizes the SOV to move the actuator in safe position (closure). The “Enable” option is available only if the parameter “Operating mode”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.11.2 LB parameters The below figures shows the procedure to set the values of the LB Parameters “Max pressure, Min pressure, Operating mode, Delay action, Max pressure diff.”, described in the previous paragraph “Line Break working parameters”.
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ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 The below figures show the procedure to set values of the LB Parameters “Max pressure increase, Max pressure decrease and Pressure drop ACQVC (ACQuisition + Valve Control)”, described in the previous paragraph “Line Break working parameters”.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.11.3 LB Sensor option The procedure described below allows setting the analogue input architecture. Sensor 1: it corresponds to “L1 Pressure sensor” in the Measurement and Setup menu Sensor 2: it corresponds to “L2 Pressure sensor” in the Measurement and Setup menu Sensor 3: it corresponds to “S3 Pressure sensor”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 3.11.4 LB options in the MEASUREMENT menu of ITVC HMI The below procedure allows viewing the “Pressure events” history and graphs and the Line Break warning list and date. In the Line Break Events page, D stays for Pressure Drop rate, H stays for High pressure, L stays for Low pressure In the Line Break warnings page the character “M”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 4 Line Break differential (LB-d) The ITVC monitors the pressure across the process valve and carries out the safe action if the differential pressure is outside the limit. The following LB-d options can be set: ...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 4.2 CPU redundancy Line Break-differential is safety function managed by two independent CPU’s working in parallel, in particular they manage input reading, logic processing and output enabling. 4.3 Output to drive the SOV ITVC functions include the test of electrical continuity and absence of short-circuit of coil of SOV.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 4.5 LB-d menu in the ITVC HMI The procedures to view the instantaneous values of the pressure transmitters, the historical data and the alarms are described in the paragraphs “Visualization of pressures”, “Instantaneous measures sub-menu”, “Historical data sub-menu”...
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 4.7 LB-d Enable / Disable By the option “Enable” and if the “condition to start” is true, the configured safe action is carried out By the option “Disable” the configured safe action is inhibited DVG AUTOMATION S.p.A.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 4.8 LB-d parameters By this option the following parameters can be set: Condition to start: type of test to decide if the safe action should start. Two options are available: The “read differential pressure is higher than a configured limit”...
MINIMUM BATTERY OPERATING TIME IN MONITORING MODE (ITVC disconnected from power supply; No. 3 sensors + No. 1 position sensors connected) STANDARD BATTERY: 12 hours (battery capacity 53Wh) - DVG P/N: CBAEOZZ0001 EXTENDED BATTERY: 36 hours (battery capacity 160Wh) - DVG P/N: CBAEOZZ0002 In case of power supply failure, battery recharge cycle will start automatically when power supply is restored.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 Local signalling: If the battery is enabled the HOME page of the ITVC HMI shows the icon . The icon shows also the charge level of battery. If the battery is discharged or unconnected the ITVC raises an alarm and the icon is The LED of pushbutton lights-up, red colour, the Open and Close actuator commands are available and work.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 6 Troubleshooting In addition to the alarms listed in the paragraph TROUBLESHOOTING of manual IOM-ITVC-Basic, the tables below show the Alarms and MRT Alarms and the Warnings generated by the Line Break function and diagnostics of pressure analogue inputs.
ITVC Series – Intelligent Total Valve Controller IOM-ITVC-LB-04 7 Start-up The following checks should be added to the procedures described in the chapter START-UP of the document IOM- ITVC-Basic LB start-up 7.1 LB start-up the digital inputs and outputs should be according to the wiring diagram ...
WARRANTY DVG Automation S.p.a. products are warranted to be free from defects in materials and workmanship for a period of eighteen months from the date of delivery (unless otherwise agreed when ordering), if they are used according to DVG Automation S.p.a. recommended usages. DVG Automation S.p.a.’s liability is limited to the repair, purchase price refund, or replacement in kind, at DVG Automation S.p.a.’s sole option, of any products proved...
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