CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSG30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 2-372LED INDICATORSFunctions: 5 device status indicators9 event cause indicators8 user-programmable pushbutton indicatorsPUSHBUTTONSType: membraneFunctions: 5 bottom Tab pushbuttons and 1 Home pushbutton for page recall4 directional, 1 ENTER, and 1 ESCAPE pushbutton element selection10 side pushbuttons for power system element controlRESET pushbutton8 physical user-programmable pushbuttons, 8 graphical interface pushbuttonsINGRESS PROTECTIONIP code: IP54 front, IP10 back (IP20 back with IP20 cover accessory)2.5.12 EnvironmentalAMBIENT TEMPERATURESStorage temperature: –40 to 85°COperating temperature: –40 to 60°C; the LCD contrast can be impaired at temperatures less than –20°CHUMIDITYHumidity: operating up to 95% (non-condensing) at 55°C (as per IEC60068-2-30 variant 1, 6 days)OTHERAltitude: 2000 m (maximum)Pollution degree: IIOvervoltage category: IIIngress protection: IP20 front, IP10 back (standard front panel and old enhanced front panel)IP40 front, IP10 back (new enhanced front panel)IP54 front with IP54 mounting collar accessory (new enhanced front panel)Ingress protection with IP20 cover accessory:IP20 backNoise: 0 dB