Compressor interlock test
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Compressor interlock test: Will a low oil pressure cause the compressor to shut down? So, how should the motor shaft temperature interlock be implemented?
You can go ask the people at the control panel; they should be able to set up analog signals using the manual controller in order to conduct interlock tests
All use analog signals; if testing were to be done through actual operations, then interlocks would be unnecessary at all – so what’s the point of having any safety measures? ! You definitely won’t cut off the oil supply to the compressor just to test the pressure interlock, right?
Many interlocks are operated by instrument operators using hand controllers, such as for bearing temperature and vibration. The automatic start-up of the standby pump and the low oil pressure interlock can be tested by slowly reducing it by adjusting the return valve.
For conducting the oil pressure low interlock test, it is possible to reduce the oil pressure using valves in order to carry out this test. The method involves allowing the oil that has been drawn from the tank to flow back into the main tank through a valve after passing through a filter; in other words, it is a reverse flow process. For the interlock test of high bearing temperatures, simulated signals are used.
Regarding pressure interlocks, there are specialized pressure pumps available for instrumentation, both pneumatic and hydraulic types. For such an important interlock test as hydraulic pressure, it is best not to use simulated signals, but to conduct actual pressure tests. This post was last edited by rmxg on 2009-4-19 18:17]
Here, in the case of testing the oil pressure interlock, if the compressor main unit does not start, the lubricating oil pump is activated; the level of oil pressure is then adjusted by means of the oil pressure control valve； As for interlocks related to exhaust temperature, motor shaft temperature, etc., it is only possible to determine whether an interlock-triggered shutdown occurs by entering simulated values into the logic program. (After all, it’s not like one would want to burn out the valve seats, packing, bearing shells, etc., just to really check the exhaust temperature, haha)
Interlocks require the setting of alarm values and interlock shutdown values, such as oil pressure and bearing temperature
For example, is the oil pressure reduced to the point that it causes the compressor to shut down? Yes, this is the interlock that shuts down the machine when oil pressure is low. So how should the interlock for motor shaft temperature be implemented? Contact the instrument technician; just create a short circuit at the temperature measurement point.