Medición Del Índice De Polarización - Circutor MI-20KVe Guia Del Usuario

6. Turn on the apparatus by pressing the ON/OFF0 key. The ON LED+ begins to bright.
7. Press the START KEY1. Then the high-voltage generator starts operating and the corresponding indication light turns
on at the front panel. The meter pointer will indicate the value of the unknown resistance. If the element to be measured
is strongly capacitive it will initially indicate a low resistance value, which will be gradually increased while the charging of
that capacitance takes place. The instrument will always begin in the scale A.
8. When the measured resistance exceeds the maximum value in range A, press range B key, and if still the value is not
achieved, press keys of ranges C or Cx10, as required.
9. Always remember to multiply the reading by the factor stated in the following table, depending on selected test voltage,
see fig. 4.
10. When key C x 10 is used, reading shall be carried out in range C and shall be multiplied by 10, in addition to the factor
corresponding to the test voltage.
11. When you press STOP KEY2, the insulation tester will start discharging the potentials accumulated in the apparatus
internal capacitances and in those of the element under test as well. When this discharging process is over (up to 60
seconds after turn off) the HIGH-VOLTAGE LED, will turn off automatically. The test leads may be disconnected. To
finish measurement press ON/OFF0 switch.
Medición del Índice de Polarización
Este megóhmetro es apto para medir el índice de polarización de transformadores. Para ello, se realiza la medición de
resistencia de aislamiento durante 10 minutos y se leen los valores indicados al cumplirse 1 minuto de medición y a los 10
minutos. El índice de polarización es el cociente entre esos valores:
1.400 1.500
1.300
1.200
1. 1 00
1.000
1 50
1 30 1 40
C
120
1 1 0
5
4
3
B
1 00
2
1
A
0
IP = R
2.000
3.000
4.000
5.000
200
250
300
400 500
1 .000
10
20 30
40 50
µ 2.000
Icc=500 A
1 00
200
BATTERY
10 min
R
1 min
21
10.000
3.000