Start Current
2)
Only support in some products.
1)
DC injection current during “Active Brake Delay” after MAV reduced to “0” . Only support in some products.
Off
On
Off
Relay
/ DO Status
Active Brake Delay
Active Brake Delay
MAV
Start Speed
Active Brake Speed
0
t
Start Delay
Off
On
Off
Start Command
Released
Activated
Reaction time of
mech
. brake
Reaction time of
mech
. brake
Mech
. Brake Status
Release Brake Current
Output Current
DC Injection Current
1)
0
t
130BF687.10
Activated
Note:
2)
Illustration 4.11 Mechanical Brake
The frequency converter is not a safety device. It is the
responsibility of the system designer to integrate safety
devices according to relevant national crane/lift
regulations.
130BE201.11
L1(N) L2(L) L3
U V W
02 01
A1
A2
Frequency converter
Output
relay
Command circuit
220 V AC
Mechanical
brake
ShaftMotor
Freewheeling
diode
Brake power circuit
380 V AC
Output
contactor
input
Illustration 4.12 Connecting the Mechanical Brake to the
Frequency Converter
Electrical Installation Operating Guide
MG07A402 Danfoss A/S © 10/2017 All rights reserved. 21
4 4
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