ATO-400/400P/600/600P Line
The Vanguard ATO micro-ohmmeter product line is specifically designed for sub-station
applications to measure EHV circuit-breaker contact resistances, bushing contact joints, or any
low resistance. These microprocessor-controlled micro-ohmmeters can accurately measure
resistances ranging from 1 micro-ohm to 300 milliohms. The ATO-400/400P outputs an unfiltered direct current from 10A to 400A while the ATO-600/600P outputs an un-filtered direct
current from 10A to 600A. The ATO-400P and ATO-600P feature a built-in 2.5” wide thermal
printer for printing test reports in the field.
The ATO product line has been in production since 2006, and over 100 units have been sold
world-wide.
1520 S. Hellman Avenue • Ontario, CA 91761 • USA
Tel: (909) 923-9390 • Fax: (909) 923-9391
www.vanguard-instruments.com
ATO-400/400P/600/600P Line
Partial Client List
Argentina
South Korea
Inducor Ingeniera S.A.
World Market Corporation
Brazil
Spain
B
Baur
Do
D Brasil
B il Ltda
Ltd
Cepal
C
l
China
UAE
Precision International Corp
Al Yakout Electrical Fittings Trading L.L.C.
AYT International LLC
Egypt
Engineering Trade Office
USA
All Supplies
Indonesia
Electro Rent Corporation
PT Surya Prima Eltrindo
Great River Energy
Hestco Inc
Jamaica
Intellirent - Acct Payable
Jamaica Public Service Co Ltd
Northwest Iowa Power Coop
Portland GE
Malaysia
RCID Utilities Div A/P
Labmetrik Electrical Sdn Bhd
Roden Electric
Tesla Motors Inc
Mexico
Universidad Nacional De La Plata
Venezuela
VCB Breakers
New Zealand
VEPCA
Fraser Engineering Services Ltd
Vietnam
Saudi Arabia
Ha Long Inspection & Technical Service Joint Stock
ARABIAN ARROWS
Haintec JSC
South Africa
ELEQUIP TRADING S.A.