GEH-7299A: Installation, Operation and Maintenance Manual
for Type VR1™ Single-Phase, Step Type Regulators
prolec.energy/prolecge 27
kVA VOLTS AMP LIFE INSPECT SWITCH SIZE
100 2500 400 1950000 1450000 HC
100 5000 200 2000000 1500000 MC
100 19920 50 2000000 1500000 HV
114.3 7620 150 600000 450000 LC
125 2500 500 1100000 840000 HC
125 5000 250 2000000 1500000 MC
138 13800 100 1250000 960000 LC
144 14400 100 2000000 1500000 HV
167 2500 668 620000 460000 HC
167 5000 334 1300000 1000000 HC
167 7620 219 1100000 830000 MC
200 19920 100 2000000 1500000 HV
207 13800 150 2000000 1500000 HC
250 5000 500 560000 420000 HC
250 7620 328 930000 700000 HC
276 13800 200 1350000 1000000 HC
288 14400 200 1100000 830000 HV
333 5000 668 310000 230000 HC
333 7620 437 550000 410000 HC
333 14400 230 740000 560000 HV
333 19920 167 1150000 870000 HV
400 19920 200 850000 640000 HV
414 138000 300 660000 490000 HC
416 7620 546 310000 230000 HC
416 14400 289 540000 410000 HV
432 14400 300 510000 380000 HV
500 14400 347 230000 170000 HV
509 7620 668 180000 130000 HC
576 14400 400 230000 170000 HV
Table 7. Expected Minimum Number of Operations
Compiled with reference to actual contact life tests of several selected ratings.
LC = Low Current Switch HC = High Current Switch
MC = Mid Current Switch HV = High Voltage Switch
On the same basis, other VR-1 regulators rated less than 100 kVA and not shown in Table 7 can operate in excess of
1,000,000 tap changes before inspection is required. This is typically more than 25 years for normal service. Again, many
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