Schneider Electric 58 TRX Drive Isolation & Bypass Contactors, Harmonic Mitigation, Documentation

Class 8839 Econoflex™ AC Drives

Sample Specifications

F.The combination enclosure shall include a 120 Vac smoke purge relay option [if required]. A user- supplied 120 Vac signal shall be sequenced in accordance with local fire protection codes and will switch the AC drive to 60 Hz operation for maximum fan motor speed. If drive bypass is supplied, the smoke purge relay will isolate the AC Drive and run the fan motor full speed on bypass.

G.The combination enclosure shall include terminal point connection for fire /freeze stat interlock, to prevent drive [or bypass] operation.

2.12 Drive Isolation & Bypass Contactors

A.The AC Drive shall include mechanically and electrically interlocked isolation and bypass contactors complete with Class 20 thermal overload relay, circuit breaker disconnect, control circuit transformer, AFC/OFF/BYPASS switch and TEST/NORMAL selector switch.

B.The operator shall have full control of the bypass starter by operation of the AFC/OFF/BYPASS selector switch.

C.In the AUTOMATIC mode of operation the bypass contactors shall be sequenced by the 110-volt rated auto start contact provided by the user.

D.The isolation contactor for the bypass shall be sequenced to provide motor isolation during a drive ready state of operation.

E.A TEST/NORMAL selector switch shall provide test operation of the power converter while operating the motor in bypass.

2.13 Harmonic Mitigation

A.The electrical distribution system has been designed to meet IEEE-519-1992 with the addition of line reactors. These line reactors shall be mounted inside the drive enclosure.

PART 3: EXECUTION

The Enclosed AC Drive shall be Econoflex by Square D Company, Class 8839.

3.01 Inspection

A.Verify that the location is ready to receive work and the dimensions are as indicated.

3.02 Protection

A.Before and during the installation, the AC Drive equipment shall be protected from site contaminants.

3.03 Installation

A.Installation shall be in compliance with manufacturer's instructions, drawings and recommendations.

B.The AC Drive manufacturer shall provide a factory certified technical representative to inspect the

contractor's installation, test and start-up the AC Drive(s) furnished under this specification for a

maximum total of [	] days. The start-up service shall be quoted as a separate line item.
3.04 Training
A. An on-site training course of [		] training days shall be provided by a representative of the AC

Drive manufacturer to plant and/or maintenance personnel.

3.05 Documentation

A.The AC Drive manufacturer shall supply a comprehensive 8-1/2" x 11" bound instruction/installation manual that includes wiring diagrams, layout diagrams, and outline dimensions. This manual must be 3-hole punched for insertion in a shop manual supplied by the installing contractor.

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09/2003