Schneider Electric 58 TRX manual Quality Assurance, 224

Class 8998 Motor Control Centers

Sample Specifications

1.05 Quality Assurance

a.The AC drive controller unit and all selected catalog options shall be UL Listed according to Motor Control Center Equipment Specification UL 845. A UL label shall be attached inside each AC drive controller unit as verification.

b.The AC drive controller unit shall be designed, constructed, and tested in accordance with NEMA and NEC standards, and shall be NOM and CSA certified.

c.The AC inverter and motor control center shall be manufactured by one supplier in an ISO 9001 certified facility.

d.Every AC inverter shall be tested with an actual AC induction motor, 100% loaded and temperature cycled within an environment chamber at 40 °C (104 °F). Documentation shall be furnished to verify successful completion at the request of the engineer.

e.The manufacturer of the AC drive controller unit shall have been specialized in the design and production of motor control center drive units for a period of at least 10 years.

f.All factory supplied options shall be completely tested for successful operation before shipment. Documentation shall be furnished upon the request of the engineer.

g.Units shall be manufacturer’s standard factory construction. Manufacturer’s catalog pages documenting MCC units to be supplied shall be submitted for approval.

PART 2: PRODUCTS

2.01 Acceptable Manufacturers

a.The AC drive controller unit shall be Square D Company Class 8998 Altivar 58 TRX or prior approved equal. Substitutions must be submitted in writing three (3) weeks prior to the original bid date with supporting documentation demonstrating that the alternative manufacturer meets all aspects of the specifications herein.

b.Additions to existing MCCs shall be the same as the original manufacturer.

c.Alternate control techniques other than pulse-width modulation technology (PWM) are not acceptable.

2.02 General Description

a.The AC inverter shall convert the input AC mains power to an adjustable frequency and voltage as defined in the following sections.

b.The input power section shall utilize a 6-pulse bridge rectifier design [with line reactors for effective harmonic mitigation]. The diode rectifiers shall convert fixed voltage and frequency, AC line power to fixed DC voltage. This power section shall be insensitive to phase rotation of the AC line.

c.The output power section shall change fixed DC voltage to adjustable frequency AC voltage. This section shall utilize intelligent power modules (IPMs) as required by the current rating of the motor.

2.03 Construction

a.The AC drive controller unit shall be a combination disconnect-drive motor control center style unit. The input [circuit breaker] [fusible switch] shall provide NEC required branch circuit protection. The [circuit breaker] [fusible switch] shall have an external operator. Wiring between the AC inverter and the disconnect shall not be disturbed when removing or installing the AC drive controller unit from the motor control center.

b.Units should be of modular construction so that it is possible to readily interchange units of the same size without modifications to the MCC structure.

c.Current-limiting power fuses or reactors shall be factory installed and wired ahead of the AC inverter input.

d.All conducting parts on the line side of the unit disconnect shall be isolated to prevent accidental contact with those parts.

e.AC drive controller units up to 50 hp variable torque shall be plug-on units which connect to the vertical bus through a spring-reinforced stab-on conductor. Units larger than 50 hp variable torque

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09/2003