ABB EBS852 Operating Instructions Manual

Also see for EBS852: Instructions Operating instruction Operating instruction

ABB EBS852 Operating Instructions Manual Manual pdf 21 page image

EBS852 / EBS862 ELECTRONIC UNIT | OI/EBS852/EBS862/EX-EN REV. B 21Please observe the following information when installing thecable set:• The specific regulations governing the installation ofelectric systems in potentially explosive atmospheresmust be observed during electric installation work. Theprovisions in accordance with EN 60079-14 must beobserved, particularly in respect of installing the shieldbonding and potential equalization between the actuator,electronic unit, and motor protection equipment, seeConnection of cable shielding on page 29.• The motor and position sensor may only be connectedusing IP 66 Ex cable glands in accordance with EN 60079ff with EU type examination certificate in accordancewith Directive 2014/34/EU.• Use a cable lug or a solid wire, bended to a ‘U’, to connectthe motor cable• Make sure that sufficient strain relief measures are inplace for all cable connections.• Protect all cables in the connection chambers sufficientlyagainst contact with metal components. Guarantee a gapof at least 6 mm (0.24 in) between all conductivecomponents.• Remove the desiccant in the connection chamber of themotor and position sensor.• Do not change the factory-set installation position of themotor junction box.• Close off any cable entries that are not required usingATEX-certified IP 66 sealing plugs.Potential equalizationIn order to avoid the risk of an electric shock, it must not bepossible to come into contact with dangerous live parts andconductive parts that can be touched should not becomedangerous live parts either under standard conditions or underconditions when a single fault occurs.The actual current flowing in the event of a fault is obtainedfrom the phase to ground voltage and the total impedancepresent in the fault circuit.For long cables, the voltage drop may be dangerous to comeinto contact with high current flowing.Preferably, the electronic unit and the actuator must beconnected with low resistance (ground resistance < 0.1 Ω) to thepotential equalization.In the process, the respective standards of the VDE 100 seriesmust be observed.Scenario 1If the PE of the actuator is done only via the PE conductor of themotor cable, the maximum permissible cable lengths for theelectronic units EAS822 and EBS852 are reduced in accordancewith the following table.The maximum permissible shutdown time of 200 ms in case of afault is complied with in the process.Max. cable lengthConductor cross-section EBS852 EBS8621.5 mm 2 (16 AWG) 176 m (577 ft) 48 m (157 ft)2.5 mm2 (14 AWG) 235 m (771 ft) 79 m (259 ft)4 mm 2 (12 AWG) 460 m (1509ft) 127 m (416 ft)6 mm 2 (10 AWG) – 190 m (623 ft)Scenario 2By laying an extra potential equalization conductor between theelectronic unit and the actuator, with a small conductor cross-section of the motor cable (e.g. 1.5 mm2 ), the maximumpermissible cable length can be increased.The ground resistance of the potential equalization conductormust be < 0.1 Ω.The maximum permissible shutdown time of 200 ms in case of afault is complied with in the process.Max. cable lengthConductor cross-section EBS852 EBS8624 mm 2 (12 AWG) 460 m (1509ft) 127 m (416 ft)6 mm 2 (10 AWG) 460 m (1509ft) 190 m (623 ft)10 mm2 (8 AWG) 460 m (1509ft) 317 m (1040 ft)Scenario 3If the cable lengths specified in Actuator assignment andmaximum cable lengths on page 22 are fully utilized, anadditional protective potential equalization must be connected.To do this, the electronic unit and the actuator must beconnected via a short cable with a minimum cross-section of4 mm 2 (12 AWG) to the on-site potential equalization.The installation regulations for setting up grounding systemsmust be observed and followed.Change from two to one column