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How to do Megger test/insulation resistance for transformer?

Transformers are one of the costliest equipment used in distribution and transmission process of power. The transformer has to go through different testing procedures periodically to prove that the transformer works properly. Deterioration of the transformer insulation resistance is one of the most common causes of failure of the transformer: a failed transformer is a costly replacement …

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Why transformer testing is needed and how to do the maintenance of a transformer

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What is the transformer A transformer is a device that can transfer electrical energy from one circuit to another through an inductively coupled conductor which is the transformer’s coils. A varying magnetic flux will be created in the transformer’s core by the varying current in the primary winding and thus a varying magnetic field through …

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Basic Pre-Commissioning Inspection:

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General Procedure: Before starting the plant operation, the plant should be commissioned. Before beginning a fresh installation, the finished device configuration must be completely screened to guarantee that the device is in complete operation, this is pre-commissioning. For each system, a set of installation / Pre-commissioning checklist banks shall be compiled covering all the items …

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Loop checking & Procedure

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What is Loop checking: Loop checking is the final process before the commissioning of the processing system. Loop checking is the process that confirms the components wired correctly and also helps to ensure that the system is functioning as designed. The loop checking checks the connection between each component in the control loop. A control …

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Procedures to do before starting up and shutting down a differential pressure transmitter

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Installation: After installation and before start up of the differential pressure transmitter, be sure to perform the following checks and procedures. Preparation: (1) Check for liquid or gas leakage of the process connection by applying soapy water or similar. (2) Check of the electrical connection according to the “Terminal block connection diagram (3) Vent the …

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How to install a Thermocouple in to a process?

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Introduction In this session we are gonna discuss about the procedures to install a thermocouple in to a process.The thermocouple is a delicate instrument and should be handled with care. (1). Keep element protected from contamination prior to installation. (2). Avoid excessive bending of lead wire. (3). Insure proper element is installed in proper location/environment. …

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Valve stem packing – replacement procedure

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What is valve stem packing? Valve stem packing is the process of tightening the valve gland follower with packing material to reduce or eliminate process leaks. It is important for the performance of the process and also for safety, regulatory compliance Types of valve packing: There are mainly two types of valve packing, Chevron valve packing …

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Calibration of Dp level transmitter at field

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Introduction In this session we are gonna discuss about calibration of Dp level transmitter in the field Material Required Data sheet Pressure calibrator (std) Multimeter (std) Hart communicator Procedures to calibrate Level transmitter in field Ask panel man to put the controller in manual mode for control loop and to put it on MOS(maintenance …

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What is Partial Valve Stroke Testing?

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Introduction Partial Valve Stroke Testing or PVST, is an emerging concept to automatically increase the performance of Safety Instrumented Systems. PVST is a concept where safety-related valves like ESD valves and shut-off valves are automatically tested concerning failure modes that are related to valve sticking and slowing down operation. Current trends in the industry show …

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Control valve stroke checking

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What is a control valve? Control valve is a power operated device which modifies the fluid flow rate in a process control system; consists of a valve connected to an actuator mechanism that is capable of changing the position of a flow controlling element in the valve in response to a signal from the controlling …

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