10
BL20K SERIES REV E 2013
SECTION 3
OPERATION
! WARNING
This equipment involves the use of voltages and currents that can be hazardous. Only qualified
personnel should be allowed to operate or service it. All covers and doors must always be in place
during operation.
3.1
CONTROLS AND INDICATORS
Table 1 lists the controls and indicators used on the Model BL20000 AC Source. The table also includes their
function. Figure 3-1and 3-2 locate these front panel controls and interconnection terminals.
3.2
TO OPERATE THE EQUIPMENT
1
)
Ensure that line circuit breaker and OUTPUT switch are set to OFF. Set the VOLTS control fully
counter- clockwise.
2)
Connect suitable load across output terminals. (Do not exceed rating of unit.)
3)
Set line circuit breaker of power chassis to ON (cooling fan noise should become evident).
4)
Set the Meter Select switch to Phase A..
4)
Rotate VOLTS control to desired voltage as indicated on the VOLTS display.
5)
Rotate the FREQ control to desired frequency as indicated on the FREQ display.
6)
Set OUTPUT switch to ON to energize load.
The load current is indicated on the AMPS display.
The meter switch may now be set to monitor the other phases.
NOTE
It is also permissible ( and sometimes desirable ) to energize a load
gradually by setting the OUTPUT switch ON and rotating the VOLTS
control from zero to low voltage position up to the voltage desired.
3.3
SHUTDOWN PROCEDURE
1)
Set OUTPUT switch to OFF.
2)
Rotate VOLTS control completely counter-clockwise.
2)
Set line circuit breaker to OFF.
The output switch may be used to switch the load on or off. It controls a relay located in the control
chassis. The useful life of this relay will be affected by high in-rush load currents. To extend relay life,
it is better to switch the output off /on with the voltage set to zero. Extremely high in-rush currents
may activate the unit’s short circuit detection. See section 3 for further details.
Содержание BL20000 Series
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