Brake Resistor Temperature Switch; Additional Connections; Dc Bus Connection; Load Sharing - Danfoss VLT AutomationDrive FC 300 Design Manual

Electrical Installation
relay1
relay2
7 7
Illustration 7.53 E- and F-Frame Additional Relay Outputs

7.5.11 Brake Resistor Temperature Switch

Frame Size D-E-F
Torque: 0.5-0.6 Nm (5 in-lbs)
Screw size: M3
This input monitors the temperature of an externally
connected brake resistor. If the input between 104 and 106
is established, the frequency converter trips on warning/
alarm 27, "Brake IGBT". If the connection is closed between
104 and 105, the frequency converter trips on warning/
alarm 27, "Brake IGBT."
Install a KLIXON switch that is "normally closed". If this
function is not used, short circuit 106 and 104 together.
Normally closed: 104-106 (factory installed jumper)
Normally open: 104-105
Terminal no.
106, 104, 105
Table 7.68 Brake Resistor Temperature Switch Terminals
NOTICE
If the temperature of the brake resistor gets too high
and the thermal switch trips, the frequency converter
stops braking and the motor coasts.
210
®
VLT
03
240Vac, 2A
02
01
06
05
04
Function
Brake resistor temperature switch.
AutomationDrive FC 300 Design Guide 90-1200 kW
Illustration 7.54 Brake Resistor Temperature Switch
Interconnect

7.6 Additional Connections

7.6.1 DC Bus Connection

The DC bus terminal is used for DC back-up, with the
intermediate circuit being supplied from an external
source.
240Vac, 2A
Terminal no.
88, 89
400Vac, 2A
Table 7.69 DC Bus Terminals
Contact Danfoss if further information is required.

7.6.2 Load Sharing

Load Sharing calls for extra equipment and safety consid-
erations. For further information, Load Sharing Application
Note.
CAUTION
Note that voltages up to 1099 V DC may
occur on the terminals.
Terminal no.
88, 89
Table 7.70 Load Sharing Terminals
The connection cable must be screened and the maximum
length from the frequency converter to the DC bar is
limited to 25 m (82 ft).
Load sharing links together the DC intermediate circuits of
several frequency converters.
WARNING
Note that mains disconnect may not isolate the
frequency converter due to DC link connection.

7.6.3 Installation of Brake Cable

The connection cable to the brake resistor must be
screened and the maximum length from the frequency
converter to the DC bar is limited to 25 metres (82 ft).
MG34S202 - Rev. 2013-08-19
106 104 105
NC C NO
Function
DC Bus
Function
Loadsharing