Reference Source

IEEE C57.21

What is the laboratory for IEEE C57.21?

For IEEE C57.21, laboratory is UL LLC; standard title is Shunt Reactors Over 500 kVA, verified against its source on 2026-09-17.

IEEE C57.21 | Shunt Reactors Over 500 kVA |

— osha.gov, retrieved 2026-08-10

Laboratory
UL LLC
Standard number
IEEE C57.21 verified
Standard title
Shunt Reactors Over 500 kVA verified
Sourceosha.gov
Verified
Review by
DatasetWhich OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

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