Operation, Operating procedure, Operational test – Basler Electric MVC236 User Manual
Page 17
9204300990 Rev J
11
Operation
When the Auto/Off/Manual control switch is placed in the Manual position, the automatic voltage regulator
is removed from the circuit and the generator output is manually controlled by the MVC 236. When the
Auto/Off/Manual control switch is placed in the Auto position, the generator output voltage is controlled by
the automatic voltage regulator. Complete excitation shutdown occurs when the Auto/Off/Manual control
switch is placed in the Off position.
Warning!
When the Auto/Off/Manual control switch is placed in the Manual or
Off position, some of the voltage regulator terminals remain connected
to the generator and present a potential shock hazard. No attempt
should be made to remove or troubleshoot the automatic voltage
regulator during generator operation.
Operating Procedure
1.
Start the prime mover according to the manufacturer’s procedure and set the manual voltage
adjust potentiometer to its minimum value (fully counterclockwise).
2.
Place the Auto/Off/Manual switch in the Manual position. Note that the generator voltage may be
unstable (hunting) if the manual voltage adjust potentiometer is set below 30 Vac.
3.
Allow the generator voltage to build and then slowly increase the generator output voltage with
the manual voltage adjust control until the generator output voltage reaches the desired level.
Operational Test
MVC 236 operation can be verified by using the following procedure. Operational test connections are
shown in Figure 7. Note that an automatic voltage regulator is not required for this test.
1.
Connect the MVC 236 according to the connections shown in Figure 7.
2.
Connect the field voltage jumper for 125 Vdc.
3.
Adjust the manual voltage adjust control fully counterclockwise and apply 120 Vac input power.
4.
Slowly rotate the manual voltage adjust control clockwise and observe that the brightness of the
light bulb increases proportionally until reaching full luminance.
5.
Rotate the manual voltage adjust control fully counterclockwise and remove the 120 Vac input
power.
6.
Connect the field voltage jumper for 63 Vdc.
7.
Apply power and slowly rotate the manual voltage adjust control clockwise and observe that the
brightness of the light bulb increases proportionally. Observe that the light bulb luminance is half
of what is was when the field voltage jumper was set in the 125 Vdc position.
8.
Rotate the manual voltage adjust control fully counterclockwise and remove the 120 Vac input
power.
9.
Connect the field voltage jumper for 32 Vdc.
10.
Apply power and slowly rotate the manual voltage adjust control clockwise and observe that the
brightness of the light bulb increases proportionally. Observe that the light bulb luminance is half
of what is was when the field voltage jumper was set in the 63 Vdc position.
MVC 236
Operation