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ManualsBrandsCummins ManualsIndustrial EquipmentRA Series Single-Phase Automatic Transfer Switch

RA series

Transfer Switches

The RA Automatic Transfer Switch is

integrated with the RS series genset.

These products are Listed to UL 1008, the

Standard for Transfer Switch Safety. The

switch and generator set combination is

specifically designed for a simplified,

quicker installation.

These UL 1008 switches are suitable for

standby power systems in residential and

light commercial applications. These RA

products adhere to National Electrical Code

(NEC) and National Fire Protection

Association (NFPA) requirements.

The RA transfer switch monitors utility

power 24 hours a day and 7 days a week.

When utility power becomes unsatisfactory

or fails; the generator set is signaled to start,

then automatically transfers the load. When

stable utility voltage returns, the transfer

switch will automatically switch electrical

load from the generator to the utility. No

action is required by the home owner.

The RA switch is also available in Service

Entrance models. A service entrance version

is also UL 1008 listed and makes use of a

UL 489 listed circuit breaker.

Features

Mechanically interlocked contactor

 Long-life, high pressure, silver alloy contact

resists burning and pitting

 A powerful and economical solenoid drives the

mechanism

UL 489 Listed circuit breaker

Solid bus bar connection

 Between circuit breaker and transfer switch

Neutral and ground bar

 Fully rated

 Bonding jumper on neutral and ground

 Silver plated copper ground and neutral bus

Ease of connection

 Solderless screw type terminals for external

power connections

Summary of content (4 pages)

PAGE 1
RA series Transfer Switches The RA Automatic Transfer Switch is integrated with the RS series genset. These products are Listed to UL 1008, the Standard for Transfer Switch Safety. The switch and generator set combination is specifically designed for a simplified, quicker installation. These UL 1008 switches are suitable for standby power systems in residential and light commercial applications.
PAGE 2
RA | 2 Transfer switch mechanism      A powerful and economical solenoid powers RA Transfer Switches. Independent break-before-make action is common for 2-pole. Mechanical interlock prevents simultaneous closing of normal and emergency contacts. Electrical interlocks prevent simultaneous closing signals to normal and emergency contacts and interconnection of normal and emergency sources through the control wiring. Long-life, high pressure, silver alloy contacts resist burning and pitting.
PAGE 3
RA | 3 UL 1008 withstand and closing ratings Transfer switch ampere 100A 200A 100A SE 200A SE 400A 400A SE Coordinated molded case breakers 22,000 22,000 10,000 10,000 35,000 35,000 Enclosures Wire bend space complies with 2013 NEC. Dimensions - transfer switch in UL type 3R enclosure Model and Amp rating 100 A 200 A 100A SE 200A SE 400 A 400A SE Height in 24.0 27.1 23.3 23.3 36.9 47.9 Mm 619 688 591 591 937 1217 Width in 17.0 18.2 19.8 19.8 24.9 23.4 Depth in 7.4 7.4 7.2 7.2 11.1 11.
PAGE 4
RA | 4 www.cumminspower.com North America 1400 73rd Avenue N.E. Minneapolis, MN 55432 USA Phone 763 574 5000 Fax 763 574 5298 Asia Pacific 10 Toh Guan Road #07-01 TT International Tradepark Singapore 608838 Phone 65 6417 2388 Fax 65 6417 2399 Brazil Rua Jati, 310 Guarulhos – Sao Paulo CEP – 07180-140 Phone 55 11 2186 4195 Fax 55 11 2186 4729 Europe, CIS, Middle East & Africa Manston Park Columbus Ave.