5kV Class Equipment.
The in-plant medium-voltage class — covering nominal system voltages of 2.4 kV, 4.16 kV, and 4.8 kV used for industrial distribution and large motor feeders, with standard BIL of 60 kV per IEEE C57.12.00.
- Equipment categories
- 8
- Nominal voltages
- 2.4 / 4.16 / 4.8 kV
- Standard BIL
- 60 kV
Standards.
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IEEE C57.12.00
Liquid-immersed transformer general requirements — defines 5kV class BIL at 60 kV.
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IEEE C37.20.2
Metal-clad switchgear standard; covers 4.76 kV maximum-voltage 5kV-class switchgear lineups.
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IEEE 404
Extruded and laminated dielectric shielded cable joints (splices) rated for 5kV systems.
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IEEE C62.11
Metal-oxide surge arresters sized to 5kV-class system MCOV and energy class.
Equipment categories rated for 5kV.
Transformers
Distribution and power transformers — dry-type and liquid-immersed units rated for 5kV class in-plant service and motor loads.
View categorySwitchgear
Metal-clad and metal-enclosed switchgear per IEEE C37.20.2 for 5kV-class indoor industrial installations, including motor-feeder lineups.
View categoryCable Splices
Cold-shrink and heat-shrink splices for 5kV cable joints per IEEE 404.
View categoryCable Terminations
Indoor and outdoor terminations for 5kV cable ends at transformers, switchgear, and motor terminal boxes.
View categorySurge Arresters
Distribution and intermediate class arresters sized for 5kV system MCOV and energy class — motor and transformer protection.
View categoryInsulators & Bushings
Polymer and porcelain insulators and bushings rated for 5kV class equipment and apparatus.
View categoryFault Indicators
Faulted-circuit indicators for 5kV-class plant distribution feeders.
View categoryMetering Equipment
Instrument transformers and metering equipment for 5kV-class industrial service.
View categoryMedium-voltage classes.
In-plant industrial distribution and large motor feeders. 2.4-4.8 kV, 60 kV BIL.
You are hereThe dominant utility primary-distribution class. 12.47-13.8 kV, 95 kV BIL.
View class 25kVSuburban and rural utility distribution. 24.94 kV (25/28 kV), 125 kV BIL.
View class 35kVCollector systems and long rural feeders. 34.5 kV, 150 kV BIL.
View classFAQ.
What nominal system voltages does the 5kV class cover?
The 5kV class is applied to nominal system voltages of 2.4 kV, 4.16 kV, and 4.8 kV — the in-plant distribution voltages used for large industrial motor feeders and on-site medium-voltage distribution.
The class designation refers to the equipment insulation rating, not the actual operating voltage. A “5kV class” transformer is rated for a maximum system voltage in that range, with standard BIL of 60 kV per IEEE C57.12.00.
What is the standard BIL for 5kV class equipment?
Standard BIL for 5kV class equipment is 60 kV per IEEE C57.12.00. BIL — Basic Impulse Insulation Level — is the equipment's specified ability to withstand a standard impulse voltage wave without insulation breakdown.
It is coordinated with the surge arresters on the system. The corresponding maximum rated voltage for 5kV-class metal-clad switchgear is 4.76 kV per IEEE C37.20.2.
Where is the 5kV class used?
The 5kV class is the workhorse of in-plant medium-voltage distribution. Large industrial facilities take MV service and step down to 4.16 kV or 4.8 kV to feed large motors, pumps, compressors, and on-site distribution that would draw impractical current at low voltage.
Because the loads are motor-dominated, 5kV-class switchgear lineups are commonly built as motor-control and feeder configurations, and the transformers serve plant distribution rather than utility primary lines.
How does the 5kV class differ from the 15kV class?
The 5kV class covers 2.4-4.8 kV systems with 60 kV BIL; the 15kV class covers 12.47-13.8 kV systems with 95 kV BIL. The 5kV class is predominantly an industrial in-plant class, while 15kV is the dominant utility primary-distribution class.
Equipment selection follows the system voltage: 4.16 kV plant distribution uses 5kV-class apparatus, whereas utility primary at 13.8 kV uses 15kV-class apparatus. See the 15kV class for utility primary distribution.
What standards govern 5kV class equipment?
Liquid-immersed transformers are governed by IEEE C57.12.00 (general requirements); dry-type units use IEEE C57.12.01. Metal-clad switchgear is governed by IEEE C37.20.2 and metal-enclosed by IEEE C37.20.3.
Cable splices and terminations use IEEE 404 and IEEE 48. Surge arresters use IEEE C62.11. Hawk states standards for reference; exact product specifications are confirmed by the manufacturer at quote.
Sourcing 5kV equipment?
Send the category, nominal voltage, BIL, and quantities for a quote.
5kV class equipment for in-plant distribution.
The 5kV class is the medium-voltage class used inside industrial facilities. It covers nominal system voltages of 2.4 kV, 4.16 kV, and 4.8 kV — the voltages large plants use to feed medium-voltage motors, pumps, and compressors and to run on-site distribution that would draw impractical current at low voltage. Equipment in this class is built to IEEE C57.12.00 for liquid-immersed transformers, IEEE C37.20.2 for metal-clad switchgear, IEEE 404 for cable splices, and IEEE C62.11 for surge arresters, with standard BIL of 60 kV.
Hawk MV Supply sources 5kV-class equipment across 8 product categories — transformers, switchgear, cable splices and terminations, surge arresters, insulators and bushings, fault indicators, and metering equipment. Because 5kV-class loads are motor-dominated, switchgear is frequently specified as motor-feeder and control configurations. Contact us to develop part numbers and check stock and lead time across the linecard.