Regarding the interlock circuit testing before the commissioning of the new equipment,,,,,,
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According to the \"Specifications for Commissioning of Chemical Industry Construction Projects\", during the pre-commissioning phase, it is necessary to conduct tests on interlocks. During the actual commissioning process, it is also required to carry out tests and adjustments of the DCS and control systems under simulated operating conditions, as well as individual tests of the alarm interlock circuits； ” So, does the interlock need to be tested twice before starting work? Doing it under simulated operating conditions – can this be understood as doing it during the water circulation process? So for example, if a unit has N shutdown interlock conditions, does each condition need to be tested to cause the unit to shut down?
By testing one by one with the values of analog signals, this is not the same as water interconnection; once the interlock logic is properly tested, it will be very convenient to start up the system.
After the construction contractor conducted a interlock function test prior to the mechanical completion, is it still necessary for the owner to conduct another test?
To ensure safety and success, it is necessary
The construction contractor carries out the interlocking tests, with the owner also participating; it’s sufficient to do this once. Generally, the construction contractor is not able to conduct these tests on its own, and in such cases it is the owner who handles them.