Demag DR rope hoist - Demag Cranes & Components

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Cross travel motor connection diagram Cross-travel drive with frequency inverter Fig. 6 PE 1L1 1L2 1L3 U1 ~ ~ M 3~ V1 W1 TB1 TB2 EG integrated pulse generator Brake release contact Temperature sensor, hoist and cross travel motor Thermo-switch Switchgear cabinet VE RD BU WH RD Motor X1 BD2 BD1 Brake 2L1 2L2 2L3 U 6 5 4 3 2 1 7 GE ~ ~ + - Motor terminal block Motor terminal block 18 20364044.p65/081105 U1 T1 V1 T2 U1 T1 W1 T3 V1 T2 L1 L2 L3 W1 T3 U SP1 SP2 TB1 TB2 BD1 SP1 L+ L- BD1 BD2 42355844.eps 41003384.eps BD2 SP2 TB1 TB2 See operating instructions for Motors, type Z, ident. no. 214 228 44 See operating instructions for Motors, type Z, ident. no. 214 228 44 See operating instructions for Motors, type Z, ident. no. 214 228 44
20364044.p65/081105 Brake control Various control modules are available for controlling Demag B003 to B680 disk brakes with DC magnets. All modules can also be fitted inside the switchgear cabinet. In this case, the brake coil must be protected against switching voltage peaks by means of a varistor, part no. 260 898 84, in the motor terminal box. All rectifiers feature varistor protection against overvoltage at the AC input and on the switching contact terminal as standard. The braking rectifiers are approved for a max. AC voltage of 500 V AC. Brake cut-out in the AC or DC circuit is possible with GE rectifiers (cross travel) and GS rectifiers (hoist) depending on the connection. Brake application times are highly dependent on the way in which the brake is switched off. For the DR without electrical control system, cut-out in the DC circuit by using the VE module is necessary. Operation with frequency inverters If ZB cylindrical rotor brake motors are operated together with inverters, the brake must be provided with a separate power supply and control. Brake control modules GE brake rectifiers (normal excitation) GE brake rectifiers are used for the cross travel drive of the DR as standard. They mainly consist of a half-wave rectifier with integrated free-wheeling circuit. GS brake rectifiers (high-speed excitation) GS brake rectifiers are used for the ZBR motors of the DR hoist drives as standard. The GS module includes a reversible rectifier which overexcites the brake for approx. 0,3 seconds to release it and supplies it with the appropriate holding voltage from a half-wave rectifier (overexcitation factor of 2,5 with 3-phase connection). Important: When used with a pole-changing motor, GS modules must always be provided with a separate power supply. To ensure perfect functioning for cut-out of the GS and VE modules, i.e. switching with overexcitation, min. 250 ms must expire between cut-out and switching on again. VE voltage relays (voltage-dependent high-speed trip relay) VE voltage relays can be combined with GE, GS and GP brake rectifiers. VE voltage relays must only be used for brakes with a separate power supply. These modules are preferably used for inverter-fed motors. They are used for high-speed demagnetization of the brake to achieve fast brake application times without the need for additional wiring for brake cut-out in the DC circuit. VE voltage relays are connected to the brake power supply. The contact in the DC circuit is opened when the brake is switched off. 19
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Page 3 and 4: 20364044.p65/081105 Introduction Th
Page 5 and 6: 20364044.p65/081105 Selection crite
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Page 9 and 10: 20364044.p65/081105 Key data cross
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Page 13 and 14: 20364044.p65/081105 Customer connec
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Page 17: 20364044.p65/081105 Connection diag
Page 21 and 22: 20364044.p65/081105 Technical data
Page 23 and 24: 20364044.p65/081105 MKA-2 front pla
Page 25 and 26: 20364044.p65/081105 ZMS, FGB-2, FWL
Page 27 and 28: 20364044.p65/081105 Calculation of
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Page 31 and 32: 20364044.p65/081105 Notes 31

Demag DR rope hoist - Demag Cranes & Components

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