We have had a failure of a 22yr old porcelain ZnO surge arrester on a 66kV 10/12.5MVA DYN11 transformer fed from an OHL. Last inspection showed no evidence of any issues. We do not have a spare and the suppliers come in at a 6-8 week lead time. The other two arresters appear to be ok. This unit...
Hi,
I want to transmit a 4-20ma valve position to a control system. However the CPT in the actuator supplies power to the loop and the control system I/O also supplies the loop. Neither can be changed without considerable expense. Is there any way of isolating the two loops or any opto isolators...
Hi, we have a paradigm babel box to convert between an NFC Instromet computer and a Metso (Valmet) DCS. We appear to have lost the settings and have no manuals on the device. It now appears to be obsolete. Does anyone know of any information or companies providing service for these devices or...
