Main Menu - Brakes - Group; Overvoltage Control - Danfoss VLT HVAC Basic Drive Programming Manual

Parameters

3.3 Main Menu - Brakes - Group 2

2-00 DC Hold/Motor Preheat Current
Range: Function:
50.0 % [0.0 - Set holding current as a percentage of the
*
160.0 %] rated motor current IM,N 1-24 Motor Current.
2-00 DC Hold/Motor Preheat Current holds the
motor function (holding torque) or pre-heats
the motor. This parameter is active if DC
hold is selected in 1-72 Start Function [0] or
1-80 Function at Stop [1].
NOTE
The maximum value depends on the rated motor current.
Avoid 100% current for too long. It may damage the motor.
2-01 DC Brake Current
Range: Function:
50.0 % [0.0 - 150.0 Set current as % of rated motor current,
*
%] 1-24 Motor Current. DC brake current is
applied on stop command, when speed is
below the limit set in 2-04 DC Brake Cut In
Speed; when the DC Brake Inverse function
is active; or via the serial port. See 2-02 DC
Braking Time for duration.
50.0 % [0.0 - 150.0
*
%]
NOTE
The maximum value depends on the rated motor current.
Avoid 100% current for too long. It may damage the motor.
2-02 DC Braking Time
Range: Function:
10.0 s [0.0 - 60.0 s] Set the duration of the DC braking current
*
set in 2-01 DC Brake Current, once activated.
2-04 DC Brake Cut In Speed
Range: Function:
0.0 Hz [0.0 - 400.0 This parameter is for setting the DC brake
*
Hz] cut in speed at which the DC braking
current 2-01 DC Brake Current is to be
active, in connection with a stop
command.
VLT HVAC Basic Drive Programming Guide

3.3.1 2-1* Overvoltage Control

Par. group for selecting dynamic braking parameters.
2-10 Brake Function
Option:
[0]
2-17 Over-voltage Control
Option:
[0]
[2]
NOTE
The ramp time is automatically adjusted to avoid tripping of
the frequency converter.
®
MG.18.B1.02 - VLT is a registered Danfoss trademark
Function:
Off No brake resistor installed.
Function:
Select whether to enable OVC, which reduces the
risk of drive trip due to over voltage on the DC link
caused by generative power from load.
Disabled No OVC required.
Enabled Activates OVC.
*
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