Danfoss VLT AQUA High Power Operation Instructions Manual page 63

VLT AQUA High Power Operation Instructions
Please note that voltages up to 1099 VDC, depending on the supply voltage, may occur on the terminals.
F Frame Requirements
The brake resistor(s) must be connected to the brake terminals in each inverter module.
3.6.9 Brake Resistor Temperature Switch
Torque: 0.5-0.6 Nm (5 in-lbs)
Screw size: M3
This input can be used to monitor the temperature of an externally connected brake resistor. If the input between 104 and 106 is established, the
frequency converter will trip on warning / alarm 27, "Brake IGBT". If the connection is closed between 104 and 105, the frequency converter will trip on
warning / alarm 27, "Brake IGBT".
Normally closed: 104-106 (factory installed jumper)
Normally open: 104-105
Terminal No.
106, 104, 105
If the temperature of the brake resistor gets too high
and the thermal switch drops out, the frequency con-
verter will stop braking. The motor will start coasting.
A KLIXON switch must be installed that is `normally
closed'. If this function is not used, 106 and 104 must
be short-circuited together.
3.6.10 Load Sharing
Terminal No.
88, 89
The connection cable must be screened and the max. length from the frequency converter to the DC bar is limited to 25 metres (82 feet).
Load sharing enables linking of the DC intermediate circuits of several frequency converters.
Please note that voltages up to 1099 VDC may occur on the terminals.
Load Sharing calls for extra equipment and safety considerations. For further information, see load sharing Instructions MI.50.NX.YY.
Please note that mains disconnect may not isolate the frequency converter due to DC link connection
Function
Brake resistor temperature switch.
Function
Loadsharing
®
MG.20.P3.02 - VLT is a registered Danfoss trademark
3 How to Install
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