Danfoss vlt hvac drive fc 102 Operating Instructions Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

4.1.8 Brake Cable for Frequency Converterswith Factory Installed Brake ChopperOption(Only standard with letter B in position 18 of typecode).The connection cable to the brake resistor must bescreened and the max. length from frequency converter tothe DC bar is limited to 25 m (82 ft).Terminal No. Function81, 82 Brake resistor terminalsTable 4.8 Terminals for Brake ResistorThe connection cable to the brake resistor must bescreened. Connect the screen with cable clamps to theconductive back plate at the frequency converter and tothe metal cabinet of the brake resistor.Size the brake cable cross-section to match the braketorque. See also the instructions Brake Resistor and BrakeResistors for Horizontal Applications for further informationregarding safe installation.WARNINGNote that voltages up to 1099 V DC, depending on thesupply voltage, may occur on the terminals.F enclosure requirementsThe brake resistor(s) must be connected to the braketerminals in each inverter module.4.1.9 Brake Resistor Temperature SwitchTorque: 0.5-0.6 Nm (5 in-lbs)Screw size: M3This input can be used to monitor the temperature of anexternally connected brake resistor. If the input between104 and 106 is established, the frequency converter tripson warning/alarm 27, Brake IGBT. If the connection isclosed between 104 and 105, the frequency converter tripson warning/alarm 27, Brake IGBT.Install a KLIXON switch that is normally closed. If thisfunction is not used, short circuit 106 and 104 together.Normally closed: 104-106 (factory installed jumper)Normally open: 104-105Terminal No. Function106, 104, 105 Brake resistor temperature switch.Table 4.9 Terminals for Brake Resister Temperature SwitchNOTICEIf the temperature of the brake resistor gets too highand the thermal switch drops out, the frequencyconverter stops braking. The motor starts coasting.4.1.10 Load SharingTerminal No. Function88, 89 LoadsharingTable 4.10 Terminals for Load SharingThe connection cable must be screened and the max.length from the frequency converter to the DC bar islimited to 25 m (82 ft).Load sharing enables linking of the DC intermediatecircuits of several frequency converters.WARNINGVoltages up to 1099 V DC may occur on the terminals.Load Sharing calls for extra equipment and safetyconsiderations. For further information, see theinstuctions Load Sharing.WARNINGMains disconnect may not isolate the frequencyconverter due to DC-link connection.4.1.11 Shielding against Electrical NoiseBefore mounting the mains power cable, mount the EMCmetal cover to ensure best EMC performance.NOTICEThe EMC metal cover is only included in units with anRFI filter.Electrical Installation VLT HVAC Drive FC 102 Operating Instructions58 MG11F402 - Rev. 2013-12-1644