Features42000 series incorporates enhanced noise filtering and sine wave tracking for superior protectionParallel operated design features 40 mm Dia, metal oxide varistors and EMI/RFI filter circuitry equipped with high voltage rise capacitors for harmonic toleranceEquipped with indicator lights and audible alarm for monitoring power and surge suppression status3-phase units are suitable for both WYE and DELTA alternating current systemsParallel hardwired via 12 AWG wire connectionReal time protection status LEDs and audible alarm diagnosticsTransient voltage surge suppression moduleWithout surge counter