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E3 Adjustable Speed Drive
Engineering Specification
PART 1 - GENERAL
1.0 Scope
This specification shall cover Toshiba E3 AC Variable Frequency Drives, 6 pulse for
230V and 460V.
1.1 References
A. National Electric Manufactures Association (NEMA)
B. Underwriters Laboratories, Inc. (UL) and CSA
C. National Electric Code (NEC)
D. IEEE 519. Compliance of IEEE 519 can be determined after Toshiba performs a
harmonics analysis. The analysis will be done after we receive a completed
harmonics questionnaire.
E. ISO 9001
1.2 Submittal
Submittals shall include Toshiba standard operation manual. Schematics can be obtained
from factory upon request.
PART 2 – E3 VARIABLE FREQUENCY DRIVE
2.0 General
A. This specification covers AC adjustable frequency drives for HVAC applications.
B. The manufacturer shall not have less than fifteen years of experience in the
manufacture of VFD’s.
C. The manufacturer shall manufacture both AC drives and motors at the same
facility.
D. The drive shall be manufactured in the United States.
2.1 Design Criteria
A. The drive should be a PWM (Pulse Width Modulated) transistorized inverter
using IGBT’s (Insulated Gate Bipolar Transistors) and must be fully digital.
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