Local Control Station Wiring Diagram

The following is the Local Control Station Wiring Diagram for pumps.This diagram shows how to connect the circuit to control the pump locally and remotely. The wiring is also equipped with an emergency stop so that if an emergency occurs, the operator can activate it for safety.

Wet Contact Relay and Wiring Diagram

This is very important to understand about wet contact relays, outside the head, for instrument / automation or electrical engineers. This is because it relates to the remote control method on many devices, almost all. Internal Wet Contact Relay on a Remote Device Below is a diagram showing an internal wet contact relay in a (…)

MCC Panel Components

MCC stands for Motor Control Center, as the name, an MCC functions as the control center of the motor. starting from the method of how the motor runs and stops up to monitoring how much current is flowing, the ongoing voltage, and the protection of the motor. Motors are commonly used as the driver for (…)

Megger Test Motor: Why and How We need to do

Megger test motor is a test that held to the motor winding. Megger test is actually the insulation test, many people call this test as “Megger Test” because many testers use brand Megger. Even so, actually, you can use insulation testers with other brands, there are many brands available on the market. Back to the megger (…)

Cable Insulation Resistance Test Values

There is a standard that we can use as a refference for cable insulation resistance test values. The values are approved for international use because these values are from International Electrical Testing Association. The cable insulation resistance test values give us refference when the insulation of cables is good or not, more than that usually (…)

Megger Test Results and Values

Megger test is a test conducted to determine the quality of the insulator of devices. This test is actually an insulator test of a device or cable. People often call it megger test is because the technicians often use the insulator test tool with the Megger brand. Though many brands of insulation device tests available (…)

Low Smoke Cable Test Due to Fire Case IEC 61034

Low Smoke Cable is governed by a standard that is IEC 61034. In the oil and gas industry, there are some companies that require certain conditions for cables that they use in electrical and instrumentation installations. One of them is for Low Smoke Cable. If you are an electrical engineer or instrumentation then you should (…)

Fire Resistant & Flame Retardant Cable Test

There is common cable specification in oil and gas industry. The cable specification describes about Fire Resistant and Flame Retardant Cable. Fire Resistant Cable Fire Resistant Cable is made to comply with IEC 60331. Testing this cable type shall comply to the condition below: Temperature: 750°C Duration: 90 minutes Cable under nominal voltage Results: no (…)

Conduit Fill Chart

Conduit Fill Chart is a reference to check how many maximum conductors of cables can be put in one single size conduit. If cables exceed the maximum of allowed number then they could struggle when first pulling work and higher potential to mechanical damage. Below is the Conduit Fill Chart for THWN and THHN cable (…)

Explosion Proof Junction Box and Panel, Engineers Should Understand!

Every electrical and Instrument engineer must understand about explosion proof junction box and panel if he will work for hazardous area (oil and gas). That is because he will face areas that have high risk of fire and explosion. An explosion proof junction box or panel is serving as a delimiter, while an explosion proof (…)