Petrel Star Delta Motor Starter Features - G20 Heavy duty cast motor starter enclosures Wide size range for efficient use of space Close coupling option for isolation unit Cable entries M20 to M75 The Petrel range of EEx d Star Delta Motor Starters are intended for hazardous areas Zone 1 installation - Petrel G20 cast alloy or iron explosion proof enclosures are ATEX certified, standard push button starter units through to custom designed control panels can be produced to specification. Petrel Star Delta hazardous are Zone 1 motor starters with ATEX certification are designed for manual starting of motors within the specified kW power output range and are available with or without an isolator.