Danfoss VLT AQUA Design Manual page 101

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VLT AQUA Drive Design Guide
NB!
Dynamic brake calls for extra equipment and safety considerations. For further information, please contact Danfoss.
1. Use cable clamps to connect the screen to the metal cabinet of the frequency converter and to the decoupling plate of the brake resistor.
2. Dimension the cross-section of the brake cable to match the brake current.
NB!
Voltages up to 975 V DC (@ 600 V AC) may occur between the terminals.
Illustration 5.16: Brake connection terminal for B3.
Illustration 5.18: Brake connection terminal for C3.
NB!
If a short circuit in the brake IGBT occurs, prevent power dissipation in the brake resistor by using a mains switch or contactor to
disconnect the mains for the frequency converter. Only the frequency converter shall control the contactor.
5.5.3. Relay Connection
To set relay output, see par. group 5-4* Relays.
Illustration 5.17: Brake connection terminal for B4.
Illustration 5.19: Brake connection terminal for C4.
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MG.20.N3.02 - VLT is a registered Danfoss trademark
No. 01 - 02 make (normally open)
01 - 03 break (normally closed)
04 - 05 make (normally open)
04 - 06 break (normally closed)
5. How to Install
5
101