One of the important things to do an electric power system operation is load forecasting. Load forecasting consists of short-term forecasting and short-term forecasting. The very short term load forecasting are required for regulating electrical energy generation, maintenance arrangements and regulating the labor involved. This forecasting is done to decide which plant to operate. The capacity of the plant to be operated adjusts to the load plan to be supplied the next day. The very short-term load forecasting is predicting electrical loads with time intervals every 30 minutes for the next day. In this study using Interval Type-2 Fuzzy Inference System (IT-2FIS) because it delivers a high flexibility that can be developed using other methods (hybrid). Laying out the footprint of uncertainty (FOU) membership function of the Interval Type-2 Fuzzy Inference System (IT-2FIS). This method has been applied for short- term load forecasting and will be employed for very short-term forecasting. In very short-term load forecasting IT-2 FIS has Mean Average Percentage Error (MAPE) arround 0,729%.

- Terms of reliability and security is an absolute thing required in conducting the design of installation of Power System. To obtain the reliability and safety of the use of Power on the Building there must be a good interconnection between Lightning System (Lightning System), Grounding of existing electronic devices in buildings and Grounding System Grounding (Grounding System) it. The interconnection of the three systems is carried out on a Bar Plate located in the Control Room, with a good security indication value and a reliable system if at the point of Bar Plate located in the Control Room has a value below 1 Ω. Using the Dwight formula in obtaining the earthing resistance value of the Electrical Power System on clay as an example shows the depth of Copper Rod 1 m has a value of 0.72 Ω. So by doing a good interconnection between Lightning Trap System (Lightnig System), Grounding Electronic Devices and Grounding System Power (Grounding System) in a building will get a reliable and safe Power System Power.

The use of a transmitter level detects the liquid level of a chemical percolation tank instead of a level switch, because the transmitter level provides accuracy in reading the value of the chemical fluid level. Ease of installing the transmitter level can be programmed and set up easily. The high price of a transmitter level causes entrepreneurs in the industrial world not to use the transmitter level as a reader or detector of chemical fluid levels in the production process. Based on this background, the chemical fluid level control device was designed using an ultrasonic sensor, by implementing Atmega16 as a controller. Controlling the level of chemical percolation fluid level using an ultrasonic sensor HC-SR04 as a reader or level detector. Drivers to run the motor when filling the chemical fluid tank of percol are run manually or automatically. The overall test results of ultrasonic sensors work optimum that is 75% of the 8 test data according to program settings. The average value of the ultrasonic sensor error to detect the level of percolating fluid in both tank 1 and tank 2 is 0.125 cm.

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