Power Wiring - D.c.brake Connection; Control Supply Voltage - Danfoss MCD3000 Series Manual

Either Relay Output C or Relay Output A can be
programmed to control operation of the bypass
contactor.
Par. 36 Relay A - Function Assignment = 1 (Run)
Par. 38 Relay C - Function Assignment = 0 (Run)
Failure to correctly connect the bypass
contactor (B1-T1, L2,-T2, & B3-T3) will
result in a loss of current based protection
systems possibly leading to a motor failure.
Failure to correctly connect the bypass
contactor (B1-T1, L2,-T2, & B3-T3) may
result in a phase to phase short circuit
causing severe equipment failure .

Power wiring - D.C.Brake connection

If the D.C.Braking function is to be used, a contactor
must be wired to short output terminals T2 & T3
during the braking operation. This contactor must be
controlled by the MCD3000 Relay Output C and Relay
Output C must be programmed for D.C.Brake
operation.
•
Refer to Par. 18 and 19 for D.C.Brake parameter
adjustments.
•
Refer Par. 38 Relay C - Function Assignment.
The MCD3000 power modules will be
damaged if the D.C.Brake contactor is
closed when the D.C.Brake function is not
MG.15.A2.22 – VLT is a registered Danfoss trademar
MCD3000 Series
operating, or if the .D.C.Brake contactor is incorrectly
connected between T1-T2 or T1-T3.

Control Supply Voltage

Voltage must be connected to the starter control
voltage terminals. Control voltage can be either 110
VAC or 230 VAC. (CV2)
MCD3000 Model
MCD3007~MCD3022
MCD3030~MCD3055
MCD3075~MCD3110
MCD3132~MCD3500
MCD3600~MCD3800
The following range of auto-transformers are available
as optional accessories and can be fitted within the
MCD3000 where other control voltages must be used.
Input Voltage
MCD3007 ~
MCD3055
110 VAC / 460 VAC 175G5084
110 VAC / 575 VAC 175G5085
24 VAC / 110 VAC 175G5087
Removing control voltage from the
MCD3000 resets the motor overload
protection.
Maximum VA
10VA
17VA
23VA
40VA
55VA
Part Number
MCD3075 ~
MCD3800
175G5144
175G5145
175G5146
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