ABB REF542plus - Temperature Range; Degree of Protection; Central Unit; RHMI Control Unit

REF 542plus switchbay protection and control unit
Manual Part 3: Installation and Commissioning
1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 61 / 80
9.7 Temperature range
Operation -5 ..+ 55°C
Transport and storing -20..+70°C
9.8 Degree of protection
9.8.1 Central Unit
Housing IP20
9.8.2 RHMI Control Unit
Front IP 54
Rear IP 22