Low Current Flag And High Current Flag; Motor Temperature Flag - Danfoss mcd-500 Operating Instruction

MCD 500 Operating Instruction
4-6 Relay B Off Delay
Range:
0 secs* [0:00 - 5:00 (min:secs)]
4-7 Relay C Function
Option:
Off
Main Contactor
Run
Trip*
Warning
Low Current Flag
High Current Flag
Motor Temp Flag
4-8 Relay C On Delay
Range:
0 secs* [0:00 - 5:00 (min:secs)]
4-9 Relay C Off Delay
Range:
0 secs* [0:00 - 5:00 (min:secs)]

7.8.3 Low Current Flag and High Current Flag

The MCD 500 has low and high current flags to give early warning of abnormal operation. The current flags can be configured to indicate an abnormal
current level during operation, between the normal operating level and the undercurrent or instantaneous overcurrent trip levels. The flags can signal
the situation to external equipment via one of the programmable outputs. The flags clear when the current returns within the normal operating range by
10% of the programmed motor full load current.
4-10 Low Current Flag
Range:
50%* [1% - 100% FLC]
4-11 High Current Flag
Range:
100%* [50% - 600% FLC]

7.8.4 Motor Temperature Flag

The MCD 500 has a motor temperature flag to give early warning of abnormal operation. The flag can indicate that the motor is operating above its
normal operating temperature, but lower than the overload limit. The flag can signal the situation to external equipment via one fo the programmable
outputs.
4-12 Motor Temp Flag
Range:
80%* [0% - 160%]
Function:
Sets the delay for re-opening Relay B.
Function:
Selects the function of Relay C (normally open).
Relay C is not used
The relay closes when the MCD 500 receives a start command, and remains closed as long as the
motor is receiving voltage.
The relay closes when the starter changes to run state.
The relay closes when the starter trips.
The relay closes when the starter issues a warning.
The relay closes when the low current flag activates (Par. 4-10
The relay closes when the high current flag activates (Par. 4-11
The relay closes when the motor temperature flag activates (Par. 4-12
Function:
Sets the delay for closing Relay C.
Function:
Sets the delay for re-opening Relay C.
Function:
Sets the level at which the low current flag operates, as a percentage of motor full load current.
Function:
Sets the level at which the high current flag operates, as a percentage of motor full load current.
Function:
Sets the level at which the motor temperature flag operates, as a percentage of the motor's thermal
capacity.
MG.17.K2.02 - VLT ® is a registered Danfoss trademark
7 Programming
Low Current Flag
).
High Current Flag ).
Motor Temperature Flag
).
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