Ampgard medium-voltage motor control (2.5, 5.0, 7.2 kV)

Voltage Class

2.4 kV
5 kV
7.2 kV

Horsepower

up to 3000 Hp
up to 5000 Hp
up to 8000 Hp

Main Bus Rating

up to 3000 A

Core features

Designed and tested to meet UL 347
Available with arc-resistant enclosures that comply with IEEE Standard C37.20.7-2017
Outfitted with Eaton’s Type SL vacuum contactors - the industry’s highest interrupting ratings
Proven durability with a long-life isolation switch rated for 10,000 mechanical operations
Top-mounted main bus for convenient installation and maintenance
Starter types include full voltage non-reversing (FVNR), reduced voltage reactor (RVR), reduced voltage autotransformer (RVAT) and reduced voltage solid state soft starter (RVSS)
Available with Eaton EMR series of motor protection relays for comprehensive and safe motor monitoring and starting control
Completely front accessible
Two-high 400 A and one-high 800 A starter configurations

View design guide (layouts, technical data and application information)

Download guide spec (26 18 39)

Learn more about our Ampgard reduced voltage soft starter (RVSS), the first UL 347 medium-duty rated soft starter in the market.

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800A starter showing internal components

400A starter showing internal components

Main (lower) and variable frequency (upper) buses

800A bypass and motor select starters with double bus

Low voltage control door with Eaton EMR3000 protective relay

Ampgard lineup with double bus close coupled to SC9000EP drive

Main breaker bus connected to 2-high Ampgard

Ampgard remote operator installed on 400A starter

400A SL vacuum contactor with bolted connections

Ampgard lineup with incoming line, 2-high 400A, and 800A sections

1200A manually operated load break switch

Ampgard RVSS open doors

800A starter showing internal components

400A starter showing internal components

Main (lower) and variable frequency (upper) buses

800A bypass and motor select starters with double bus

Low voltage control door with Eaton EMR3000 protective relay

Ampgard lineup with double bus close coupled to SC9000EP drive

400A and 800A starters installed

Low voltage control panel and door

Main breaker bus connected to 2-high Ampgard

Ampgard remote operator installed on 400A starter

400A SL vacuum contactor with bolted connections

Ampgard lineup with incoming line, 2-high 400A, and 800A sections

Potential transformer disconnect switch

4160V stand-alone reactor starter

1200A manually operated load break switch

See Eaton's full medium-voltage control assemblies portfolio

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Watch this video to learn more about Ampgard AR, the next generation of arc-resistant medium-voltage motor control.

Take control of your motors

Ampgard reduced voltage soft starter (RVSS) is designed to prevent mechanical shock, current spikes and voltage drops with a full suite of programmable settings. Featuring an exclusive pre-start check and UL-347 medium duty ratings, the RVSS seamlessly integrates into Eaton’s Ampgard SC9000 drives and medium-volage switchgear lineups.

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Ampgard, the name motor applications rely on

Eaton has been an industry leader for more than 50 years, providing UL 347 certified medium-voltage control. When it comes to controlling and protecting medium-voltage motors, the Ampgard family is the premier high-performance choice.

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Money saving double-bus design

When close-coupling Ampgard starters with medium-voltage drives for synchronous transfer applications the double bus eliminates external cables and associated accessories required to connect motor-select and bypass starters. Material and labor savings can be upwards of $25,000 for a four-motor system.

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Remote operator for enhanced safety

The Ampgard Remote Operator (ARO) for the starter isolation switch when mounted on the front of the starter allows personnel to safely open and close the switch from outside the arc flash boundary.

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Integrated control gear streamlines multi-configuration lineups

Combine Eaton’s Ampgard motor starters with SC9000 medium-voltage drives across a common bus into a compact and economical integrated assembly.

Specifications

View design guide (layouts, technical data and application information)

Download guide spec (26 18 39)

Ratings

POWER RATING	50-8000 Hp
INPUT VOLTAGE RATING	2400-6900 V
BASIC IMPULSE LEVEL (BIL)	60 kV BIL
INTERRUPTING RATING	50 kA rms symmetrical
AMBIENT TEMPERATURE	0 to 40 degrees C

Standards

UL	347
NEMA	ICS3
CSA	22.2 no. 253-16
THIRD PARTY RECOGNITION/APPROVAL	UL/cUL available for most configurations
SEISMIC QUALIFICATION	IBC

Enclosure

ENCLOSURE TYPE	NEMA 1, NEMA 12, NEMA 3R
ACCESSIBILITY	Front
INDOOR SECTION DIMENSIONS (TYPICAL)	36"w x 30"d x 92"h
BUS INSULATION	Uninsulated is standard, heat shrink sleeve is optional
BUS SUPPORTS	Glass polyester

DEVICES

SWITCHING DEVICE	Vacuum contactor (400 A / 800 A)
CONTACTOR CONNECTION	Bolted is standard, stab-in is optional
FUSE MOUNTING	Bolted is standard, clip-in is optional

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Ampgard medium-voltage motor control (2.5, 5.0, 7.2 kV)

Core features

View design guide (layouts, technical data and application information)

Download guide spec (26 18 39)

Key features of our Ampgard RVSS

Image gallery

See Eaton's full medium-voltage control assemblies portfolio

Want to learn more?

Take control of your motors

Ampgard, the name motor applications rely on

Money saving double-bus design

Remote operator for enhanced safety

Integrated control gear streamlines multi-configuration lineups

View design guide (layouts, technical data and application information)