2.3 DESIGN RATINGS A. Switch Ratings - the switch be rated (choose appropriate column): SELECTION OF RATINGS IEEE/IEC Maximum Design Voltage, kV 15.5 Impulse Level (BIL) Voltage, kV 110 Continuous Current, Amperes 630 Load break Current, Amperes 630 One Minute Withstand (dry), AC kV 35 Production Test Rating 34 15 Minute Withstand, DC kV 53 Momentary Current, kA, ASYM 64 Fault-Close Current, kA, ASYM 64 One Second Current, kA, SYM 40 Mechanical Endurance, Operations 2000 2.4 CABLE ENTRANCES A. Load Switches entrances shall be tested to IEEE 386 and be, as indicated on the switch drawing: 600 amp G&W Apparatus Bushing, 2.5 FACTORY PRODUCTION TESTS Each switch shall undergo the following production testing. Test reports must be available upon request Each switch shall be factory filled with SF6 gas. The gas shall be checked for moisture content Each switch shall undergo an SF6 leak check to verify the integrity of the tank, seals, and gaskets A mechanical operation check of each switching mechanism AC hi-pot tested one minute phase-to-phase, phase-to-ground and across the open contacts Circuit resistance shall be checked. 2.6 STANDARD COMPONENTS The following shall be included as standard: ¼” 304/304L dual certified stainless tank Removable type operating handle with cotter pins Temperature compensating pressure gauge and fill valve Provisions to lock out ground position on each way ½-13 nuts to provide sufficient grounding provisions for all cable entrances Stainless steel three line diagram and corrosion-resistant nameplates. Switch operating handles with padlock provision. (1) viewing window per way to view open contact position Provision to mount future low pressure alarm 2.7 OPTIONS The following options be supplied: (check as appropriate): ¼” 304/304L dual certified stainless steel tank
2.3 DESIGN RATINGS A. Switch Ratings - the switch be rated (choose appropriate column): SELECTION OF RATINGS IEEE/IEC Maximum Design Voltage, kV 15.5 Impulse Level (BIL) Voltage, kV 110 Continuous Current, Amperes 630 Load break Current, Amperes 630 One Minute Withstand (dry), AC kV 35 Production Test Rating 34 15 Minute Withstand, DC kV 53 Momentary Current, kA, ASYM 64 Fault-Close Current, kA, ASYM 64 One Second Current, kA, SYM 40 Mechanical Endurance, Operations 2000 2.4 CABLE ENTRANCES A. Load Switches entrances shall be tested to IEEE 386 and be, as indicated on the switch drawing: 600 amp G&W Apparatus Bushing, 2.5 FACTORY PRODUCTION TESTS Each switch shall undergo the following production testing. Test reports must be available upon request Each switch shall be factory filled with SF6 gas. The gas shall be checked for moisture content Each switch shall undergo an SF6 leak check to verify the integrity of the tank, seals, and gaskets A mechanical operation check of each switching mechanism AC hi-pot tested one minute phase-to-phase, phase-to-ground and across the open contacts Circuit resistance shall be checked. 2.6 STANDARD COMPONENTS The following shall be included as standard: ¼” 304/304L dual certified stainless tank Removable type operating handle with cotter pins Temperature compensating pressure gauge and fill valve Provisions to lock out ground position on each way ½-13 nuts to provide sufficient grounding provisions for all cable entrances Stainless steel three line diagram and corrosion-resistant nameplates. Switch operating handles with padlock provision. (1) viewing window per way to view open contact position Provision to mount future low pressure alarm 2.7 OPTIONS The following options be supplied: (check as appropriate): ¼” 304/304L dual certified stainless steel tank
Spec%20for%2064kA%20asym%20GRAM%20switches%20(front%20operator%20with%20bottom%20cables)%201116.docx