Toshiba TOSVERT VF-P7 User manual

E6581228
TOSVERT VF-A7/P7
Instruction Manual for Parameter H･H
(C)Toshiba Schneider Inverter Corporation 2003
All Rights Reserved.
This manual is intended only to describe the typical operation and application of the
product. The technical information contained in this manual does not guarantee the
intellectual proprietary rights or other rights of, or grant a license to, the Toshiba
Schneider Inverter Corporation or third parties, for the use of the technical
information or of the product.

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1.Introduction
Thank you for purchasing the Toshiba industrial inverter "TOSVERT VF-A7/P7".
This manual describes the functions of the H and H parameters for the inverter TOSVERT
VF-A7/P7.
2. Function
This parameter is used when there is a need to control the rush-current suppression resistor short-circuit relay
(hereinafter referred to as the “rush-current suppression relay”) in the inverter, for example, for the passage of a
current through a DC line or for the connection of the DC lines of multiple inverters.
3. Related parameters
Vector control
Title
Communi
cation No
Function Adjustment
range
Min. unit (panel/
communication
)
Default
setting
Write
during
running
Speed
control
Torque
control
Position
control
V/f
Constant
H 0608
Relay injection timing
for rush-current
suppression
0.3 ～ 2.5 [s] 0.1/0.01 0.3 Enabled ●/●●/●-/●●
H 0609 Mode of rush-current
suppression relay
0:Default
1:Interlocked
with ST
- 0 Enabled ●/●●/●-/●●
Sensorless vector / Vector with sensor (●: valid, - : invalid)
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4. An example of the setting of H (Relay injection
timing for rush-current suppression)
The capacitance of the smoothing capacitor in the main circuit and the initial charge time (time elapsed before the
rush-current suppression relay) is activated vary depending on the capacity of the inverter. By default, the
rush-current suppression relay is set so that it will operate 0.3 seconds after the completion of initial charge.
If necessary, this time lag can be changed using parameter H.
When connecting the DC lines of multiple inverters with different capacities (especially 3.7 kW and less inverters),
you should specify a long time lag (1 second or so) using H to prevent the occurrence of the failure described
below in inverters with DC lines through which a current is passed.
Note 1: For 3.7 kW and less inverters, as well as 18.5 and 22 kW inverters, a current detector is provided in the
position shown in the figure below. (*1)
Note 2: When passing a current through the DC lines of 18.5 and 22 kW inverters, you need to provide a
rush-current suppression circuit outside them, because the rush-current suppression circuit in each inverter
is bypassed in this case.
For any inverters other than the above, this parameter does not need to be adjusted.
[An example of an overcurrent trip when power is
turned on] 15kW
2.2kW
RY1
RY2
If the main circuit of the small capacity (2.2 kW)
inverter is electrically charged before that of the
large capacity inverter (15 kW), and RY2 closes
before RY1, a discharge current will flow from the
capacitor in the main circuit of the 2.2 kW inverter
because of a difference in charged voltage
between the circuits, with the result that an
overcurrent trip will occur.
[An example of the prevention of this trip]
Change the setting of parameter H of the
small capacity inverter (2.2 kW) from 0.3 (default)
to 1.
(*1) Current detector: Detecting the occurrence o
f
an overcurrent trip
PA
PC
PA
PC
Motor
Motor
Power
supply
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5. About parameter H (Mode of rush-current
suppression relay)
The rush-current suppression relay usually operates under the conditions shown below, but if necessary, you can
add the ON/OFF status of the ST terminal (standby signal) of the inverter to the relay activation conditions, using
parameter H.
[H = 0 (default)]
The rush-current suppression relay operates with the time lag set with H after the voltage in the DC section of
the inverter has reached the specified voltage.
DC voltage
Rush-current
suppression relay
H
ON
[H = 1 (interlocked with ST)]
The rush-current suppression relay operates along with the ST terminal with the time lag specified with H after
the voltage in the DC section of the inverter has reached the specified voltage.
DC voltage
ST terminal
H
ON
Rush-current
su
pp
ression rela
y
ON
- 3E -