Toshiba TOSVERT VF-P7 Bedienungsanleitung

E6581228

TOSVERT VF-A7/P7

Instruction Manual for Parameter H･H

(C)Toshiba Schneider Inverter Corporation 2003

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.

E6581228

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)

- 1 -

E6581228

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

an overcurrent trip

Motor

Power

supply

- 2 -

E6581228

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

[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

Rush-current

ression rela

- 3E -

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