GE prolec VR-1 Installation, Operation And Maintenance Manual

Also see for VR-1: Installation operation & maintenance

GEH-7299A: Installation, Operation and Maintenance Manualfor Type VR1™ Single-Phase, Step Type Regulatorsprolec.energy/prolecge27kVA VOLTS AMP LIFE INSPECT SWITCH SIZE100 2500 400 1950000 1450000 HC100 5000 200 2000000 1500000 MC100 19920 50 2000000 1500000 HV114.3 7620 150 600000 450000 LC125 2500 500 1100000 840000 HC125 5000 250 2000000 1500000 MC138 13800 100 1250000 960000 LC144 14400 100 2000000 1500000 HV167 2500 668 620000 460000 HC167 5000 334 1300000 1000000 HC167 7620 219 1100000 830000 MC200 19920 100 2000000 1500000 HV207 13800 150 2000000 1500000 HC250 5000 500 560000 420000 HC250 7620 328 930000 700000 HC276 13800 200 1350000 1000000 HC288 14400 200 1100000 830000 HV333 5000 668 310000 230000 HC333 7620 437 550000 410000 HC333 14400 230 740000 560000 HV333 19920 167 1150000 870000 HV400 19920 200 850000 640000 HV414 138000 300 660000 490000 HC416 7620 546 310000 230000 HC416 14400 289 540000 410000 HV432 14400 300 510000 380000 HV500 14400 347 230000 170000 HV509 7620 668 180000 130000 HC576 14400 400 230000 170000 HVTable 7. Expected Minimum Number of OperationsCompiled with reference to actual contact life tests of several selected ratings.LC = Low Current Switch HC = High Current SwitchMC = Mid Current Switch HV = High Voltage SwitchOn the same basis, other VR-1 regulators rated less than 100 kVA and not shown in Table 7 can operate in excess of1,000,000 tap changes before inspection is required. This is typically more than 25 years for normal service. Again, manyvariables affecting contact life must also be considered.