Motor operation protects against tampering and damage, on the applied control circuit protection equipment such as table 1. Reliability performance protection will determine motor protection against interference. As an illustration dipelihatkan in Figure 3-1, a circuit controlling a motor with two speeds and two-way swivel that is equipped with the tools and the TOL protection fuse or MCB. Figure 3-1. ...
Read More »Thermal Over Load Relay
Safety device used on the motor occurs when the load is called the Thermal Over Load Relay (TOR / TOL) is usually coupled with a contactor, the market there is also a more integrated security burden on Motor Circuit Breaker. Relay is normally connected to the contactor to the main contact 2, 4, and 6 before being connected to the ...
Read More »Kontaktor Magnet
Kontaktor magnet atau sakelar magnet adalah sakelar yang bekerja berdasarkan kemagnetan, artinya saklar ini dapat bekerja apabila ada gaya kemagnetan. Magnet berfungsi sebagai penarik dan pelepas kontak-kontak. Sebuah kontaktor harus mampu mengalirkan dan memutuskan arus listrik dalam keadaan normal. Arus listrik yang mengalir secara normal adalah arus listrik yang mengalir selama pemutusan tidak terjadi. Kumparan magnet kontaktor (coil) dapat dirancang ...
Read More »Electrical Power
Electrical energy is useful to us because it can be converted into other forms of energy. In the power tools such as electric heaters, electric stoves, and air conditioning, electrical energy is converted into heat energy in the wire barriers known as “heating elements”. Then, in a lot of light (Figure 7.4), a small wire filament becomes so hot that ...
Read More »Criteria Multimeter
1. Specificity of sensitivity, determined by the detainee / resistance (resistance) divided by voltage, for example 20 kΩ / v for DCV and 8 kΩ / v for ACV. (20 kΩ / v → I = E / R = 1 / 20,000 = ½ x 10- 4 A = 0,05mA = 50 uA). Multimeter uses a current of 50 ...
Read More »Pengukuran Tegangan Searah
Pengukur tegangan voltmeter memilikitahanan meter Rm. Tahanan dalammeter juga menunjukkan kepekaan meter, disebut Ifsd (full scale deflection) arus yang diperlukan untuk menggerakkan jarum meter pada skala penuh. Untuk menaikkan batas ukur voltmeterharus dipasang tahanan seri sebesar RV. Gambar 6.29 Rangkaian Dasar Voltmeter Persamaan tahanan seri meter RV: Gambar 6.30 memperlihatkan rangkaian dasar voltmeter arus bolak-balik, dengan lima batas ukur. Gambar ...
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