The ZXBM1004 is for, found suitable for the smaller fan motor however they are also more suited to the higher power fan, Application Note 43 Application note for the ZXBM1004 and ZXBM2004 variable speed motor, to drive both single-phase and 2-phase fan and blower motors using the ZXBM1004 and ZXBM2004 motor, ZXBM2004 has two phase outputs capable of driving two external power devices for each phase winding. Text: The ZXBM1004 and ZXBM2004 devices are both variable speed fan motor pre-drivers.
This is a big advantage of DPATT-3Bi that it can be used for Transformer Testing.Formula for fan motor winding Datasheets Context Search Catalog DatasheetĪbstract: Formula for fan motor winding 24V FAN CONTROL BY USING THERMISTOR 2-phase hall effect driver hybrid motor driver 2-Phase Motor hall 2-phase fan motor driver AN43 ZXBM1004 ZXBM2004
On Pressing F2 button of the keypad of DPATT-3Bi instrument, the parameters of Short Circuit Test are displayed on the LCD as shown below.
Suppose the Full Load Current, 10.49A is obtained at 463.1V therefore the Impedance Voltage is 463.1V. % Impedance = (Impedance Voltage / Rated Voltage) * 100 Step 3 – Calculations: Now calculate Impedance Voltage (the voltage at which full load current is achieved) and then calculate % Impedance as per the following formula. Step 2 – Short Circuiting: Now short circuit LT side and apply the required voltage at HT side of electrical current transformer until the full load current is achieved.
The value of Full Load Current for Transformers of different ratings is given below for reference. The values can be taken from name plate of the electrical current transformer rating:įull Load Current Formula = KVA Rating x 1000 / √3 x HV Line Voltage = 200 x1000 / √3 x 11000 Step 1 – Find Full Load Current: Calculate Full Load Current from parameters available in Transformer’s name plate as described below. Steps for conducting Short Circuit Test in Electrical Current Transformer You can see that LV side is short circuited and the voltage is applied at HV side. The following picture shows the arrangement for conducting Short Circuit Test using DPATT-3Bi. Therefore the watt meter measures only full load copper losses. Since the core losses are very small and can be neglected because applied voltage is very small as compared to the nominal voltage.
After that full load current is applied on the primary side of the transformer. In this procedure the secondary winding (usually Low Voltage Side) of the transformer is short circuited. The short circuit test useful for measuring the winding losses of a current transformer and is conducted on the high voltage HV side of the transformer. Short Circuit or Full Load Test of Electrical Transformer This test is also known as no load test, iron loss test or core loss test. Now we shall learn more details about both the transformer loss measuring or testing procedures. On the other hand to measure the iron losses open circuit test is conducted.