30
zero
crossing
detector
opto-
isolator
PLL
480 Vac
60 Hz.
Three-
Phase
XFMR1
Phase A
Phase B
Phase C
Duration
Counter
Pick-up
Counter
Drop-out
Counter
Fiber Optic
Driver
Timing Circuit
0-99
0-9999
0-99
60Hz.
6kHz.
Solid-
State
Switch
Solid-
State
Switch
Solid-
State
Switch
Load
Figure 21 Block diagram of solid state point -on-wave (POW) switch and controller
3.1.2 Operation
The operation of the power disturbance generator is such that the user programs the three
counters corresponding to the desired total interruption duration and the clocks count down
the programmed values. The counters can be programmed either manually or automatically
with a PC through the parallel port. The automatic feature is advantageous when multiple
tests are conducted back to back.
Summary :
Solid- State Switch Solid- State Switch Solid- State Switch Load Figure 21 Block diagram of solid state point -on-wave (POW) switch and controller 3.1.2 Operation The operation of the power disturbance generator is such that the user programs the three counters corresponding to the desired total interruption duration and the clocks count down the programmed values.
Tags :
state,phase,solid,switch,counter,operation,099,back,three,counters,duration,programmed,power