Bypass diagrams, Converter modules – Rockwell Automation 150 SMC Quick Start Manual User Manual

Page 29

Rockwell Automation Publication 150-QS003D-EN-P - November 2013

Installation Chapter 2

Bypass Diagrams

For bypass operation, a bypass contactor must be supplied. An auxiliary relay
contact that is programed for external bypass is used to control a properly sized
external contactor once the motor is at full speed.

Overload protection can be accomplished in several ways.

SMC-50 Providing Overload Function

• Frame B (90…180 A)

– Required parts: Cat. Nos. 150-SM2, 825-MCM180 converter module.

See

Figure 19

• Frame C and D (210…320 A and 361…520 A)

– Using bypass kit

• Required parts: Cat. No. 150-SCBK (Frame C) or 150-SDBK

(Frame D) See

Table 9

and

Figure 20

Note:

When using the Cat. No. 150-SCBK or 150-SDBK bypass

kit, the controller firmware must be FRN 3.001 or higher.

– Using 825 and CTs

• Required parts: Cat. Nos. 150-SM2, 825-MCM20, user supplied

CTs with 5 A secondary. See

Figure 18

and

Figure 19

External Overload

• Frames B, C, and D

– Bypass contactor must be fully rated to motor Hp/kW and FLA. See

Figure 21

Converter Modules

For applications in which the motor’s full load current rating is greater than
180 A (311 A inside-the-delta), three additional current transformers with 5 A
secondaries are required.

Figure 18

illustrates the connection of the current

transformers to the converter module.