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0 installation caution very important – Ingersoll-Rand NIRVANA IRN75-160K-2S User Manual

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IRN37 - 160K - CC & IRN50 - 200H -CC & IRN75 - 160K - 2S & IRN100 - 200H - 2S & IRN 250 - 300H - 2S

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7.0 INSTALLATION

CAUTION

VERY IMPORTANT

Supply voltage must be kept to a maximum imbalance of 2% on 50Hz and 3% on 60Hz applications. Voltage

imbalances greater than these levels can cause permanent damage to the drive.
Compressor must not be subjected to any voltage spikes or surges in excess of 575V. Exposure to spikes/surg-

es in excess of 575V can permanently damage the drive. If the possibility of such exists it is recommended

that adequate surge protection is fitted such as an Ingersoll Rand line reactor. See your local Ingersoll Rand

representative.
Failure of the drive due to voltage spikes, line notching, harmonics or other power quality related problems,

will not be covered by the standard compressor warranty.
The correct type and rating of line input fuse MUST BE fitted onto the customers isolator or breaker close to

the compressor. For Amp rating see technical information in Section 8.1.
Product Identification
Class − J, Class − T, or
Semiconductor

Fuse Type

Fast Acting Class−J, T or Semiconductor type,

Current limiting, Interrupt Rating − 200,000 Amps

RMS SYM.
Alternate fuse may be used if the time current

characteristics are faster than fuses recommended

in this section.

See your local Ingersoll Rand representative for a range of fuses and disconnect isolators matched to your particular

machine.

Example of voltage imbalance calculation
U

→V 462v

V

→ W 459v

W

→ U 453v

V(m) = (462 + 459 + 453) / 3 = 458v
VΔ max = 462 − 453 = 9v
= (9 / 458) x 100 = 1.97%