4·7 Instantaneous Power Failure Control - Toshiba TOSVERT-130H Instruction And Maintenance Manual

4·7 Instantaneous Power Failure Control
In case of a power failure, the inverter will continue operation according to the
following chart:
System must be restarted
1------------------------':5-~,
Manual Restart: .
(a)
If
system is stopped, system will restart upon a manual
~START"
command. :
(b) If system is running, an "OC" or uOP"fautt may occur, requiring a manual
~RESET"
:
before "STARr' :
Auto Restart: (Jumper JP8 in "AUTO" position):
(aj If system is stopped, without fault condition, system will restart normally.
(b) If system is running, or infaull condition,system may attempt restart depending on
conditions present.
,
,
,
,
, ,
,
,
I
,
,
i
,
i
f-________________
~M~A~I~N~C~IR~C~U~IT~U~N~D~E~R~V~O~L~T~A=G:E~D~E~T=E=C~T~E=D
________
.i
i
o
NO FAULT
normal
operation
maintained
Drive will maintain controlled deceleration until power r
returns, unittnen re-acceleratesto normal speed. In some :
models, depending on load inertia, this controlled
i
deceleration may continue for longer than 100 ms.
i
,
,
, ,
, ,
,
,
,
, ,
,
,
,
, ,
,
, ,
,
, ,
, ,
,
,
, ,
,
, ,
,
,
, ,
, ,
, ,
,
, ,
i
i
i
,
J51-_
iL
'
i ,
50
Failure Time (milliseconds)
Fig. 4.7 Momentary Power Failure Recovery Chart
The above deceleration control is performed as long as to the control power
sources (+5, +24, +15, -15,) are retained on the main control PCB and gate
(base) drive PCB.
(1) Instantaneous power failure of less than 30 msec:
As long as the DC main circuit voltage is held above the voltage drop detection
level, the DC-DC power source converter continues normal operation. If a voltage
drop is detected when the DC main circuit voltage decreases to 85% of the rated
voltage of the main circuit input power source, then there is deceleration control.
4-9