Toshiba TOSVERT VF-A5 Instruction Manual page 23

E6580516
I
Example 5
I
When using built-in braking resistor
(For 3.7kW and smaller units)
3-phase main
-0:
circuit power:::~
(Note) Move PR1 wiring to PB1
Setting: Set
IP
b
I in parameter group [, ,-
.,o ,-
(dynamic braking selection) to
2
(dynamic
braking with overload detection) .
The built-in braking resistor is connected to the
PB1 terminal (refer to page 24) at shipment.
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Example 6
I
When connecting a braking resistor (optional)
Note) Select a braking resistor that is higher than the min. allowable resistance value (refer to page 103).
For 22kW and larger units, the separate GTR7 (dynamic braking circuit) option is required.
a) When using an optional braking resistor with temperature fuse
3-phase main
--o:
. . - - 0
c1rcu1t power
__.,~
Braking resistor Setting: for 5.5kW and larger units, set
IP
b
I
in
R PA PB
uo---~ Motor
S
V~--{IMJ
T Wo---~
Note)
Braking resistor circuit
GIE
and terminals
'----<>-~
parameter group
G ,-
.P ,-
(dynamic braking
selection) to
2
(dynamic braking with overload
detection).
When using the built-in braking resistor with 3.7kW and smaller units, avoid the use of an external braking
resistor. However, parallel connection is possible in the following combinations. (For max. braking rate
applications)
Built-in braking
Minimum external resistor
Min. total braking
value that can be used with the
resistor
built-in braking resistor
resistance value
200V systems 2.2kW and smaller
700 700
350
3.7kW 400 400 200
b) When using an optional braking resistor without temperature fuse
MCCB MC
3-phase main
-O.:::<>-r---~20--~-0R
PA PB
u.,..-~---
circuit power
~--:- ~ ~.....__~..,..
TH-Ry is used as a fire prevention fail-safe.
DBR overload and overcurrent protection
functions are incorporated in the inverter
for protection of the braking resistor, but
TH-Ry operates if those protective functions
are not possible. Select TH-Ry according to
the DBR power rating.
Surge killer
·®·--······--------------··
FLC
---------------- - -------- -- - FlA
F
R
I
CC Forward runlreveroe run
Setting: Set
IP
b
I in parameter group
G ,-
.P ,-
(dynamic braking selection)to
c'
(dynamic
braking with overload detection), and set the
braking resistor capacity and resistance value.
(Refer to
IPbC PllPb,-
Ion page 82. )
Note) The step-down transformer does not need to be installed for 200V class inverters.
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