Owner manual

Chapter 6
1503E-IN001E-EN-P – June 2013
Contactor Installation
Introduction The MV SMC Flex components are designed for intermittent starting
duty. A bypass contactor must be used to bypass the power stacks
once the motor is at full speed.
A line contactor is also required in order to isolate the power stacks
from line voltage. A suitable medium voltage circuit breaker may be
substituted for the line contactor.
Main and Bypass Contactors Refer to Table 6.A for the required installation for contactors.
Table 6.A – Required Installation Instructions for OEM Components
Component
Required Installation Documents
Isolation Contactor
• User Manual – OEM Frame and Components, Bulletin 1503,
Publication 1503-5.0
• User Manual – Medium Voltage Contactor, Series E, Bulletin 1502,
400 Amp, Publication 1502-UM052_-EN-P or
Series D, Publication 1502-UM050_-EN-P or
Medium Voltage Contactor, Series D & E, Bulletin 1502, 800 Amp,
Publication 1502-UM051_-EN-P
Bypass Contactor
• User Manual – Medium Voltage Contactor, Series E, Bulletin 1502,
400 Amp, Publication 1502-UM052_-EN-P or
Series D, Publication 1502-UM050_-EN-P or
Medium Voltage Contactor, Series D & E, Bulletin 1502, 800 Amp,
Publication 1502-UM051_-EN-P
Bypass Contactor A bypass contactor must be used in the SMC configuration to bypass
the SCRs once the motor is up to speed.
Refer to User Manual, MV SMC Flex™ Motor Controller, Bulletin
1503E, 1560E, 1562E, Publication 1560E-UM051_-EN-P for more
information on the bypass contactor and the duty cycle. This
publication was included with your shipment.
A T T E N T I O NA T T E N T I O N
A bypass contactor must be installed to complete
the SMC configuration. SCRs are not rated for
continuous duty. The duty cycle is limited to 60
seconds per hour. This can be a combination of
starting and stopping cycles that does not exceed
30 seconds per cycle. Failure to install a bypass
contactor may result in damage to components
from overheating.