Schneider Electric 58 TRX manual Standard Features, Power Circuit Descriptions

AC	AC	W&Y copy.eps
		PowerrCircuit
M	M
Power	Power
Circuit W	Circuit Y

09/2003

Class 8839 Econoflex™ AC Drives

Standard Features

STANDARD FEATURES

The Econoflex controller includes:

•Circuit breaker disconnect with lockout capability.

•Insulated Gate Bipolar Transistor (IGBT) power converter with PWM output waveform.

•Door-mounted keypad.

•Form C AFC fault contact, rated 2 A at 120 Vac, wired to customer terminal block.

•Form C AFC run contact, rated 2 A at 120 Vac, wired to customer terminal block.

•Fire/Freezestat interlock location provided to customer terminal block.

•Factory enclosed line reactor (25 to 100 HP at 460 Vac, 15 to 50 HP at 208/230 Vac).

•Top and bottom conduit knockouts for Type 1 and Type 12K.

•Industrial rated control operators.

•UL 508C listed with NEMA ICS 7.1 compliance.

•Instruction bulletin 30072-450-10.

When Bypass is selected the Econoflex controller also includes:

•Isolation and Bypass Contactors, mechanically and electrically interlocked.

•AFC-OFF-BYPASS Selector Switch.

•TEST-NORMAL Selector Switch.

•Class 20 overload protection.

Power Circuit Descriptions

•Power Circuit W operates the motor from the power converter.

•Power Circuit Y operates the motor from the power converter or from full voltage line power, bypass. The isolation and bypass contactors are mechanically and electrically interlocked. The two contactor isolation/bypass configurations sequence the contactors to provide the isolation of the motor when it is not running.

Test-Normal Selector Switch Description

The Test-Normal selector switch is mounted on the door of the controller and supplied with the bypass circuit. The Test-Normal switch is used to test the power converter while operating the motor in bypass. To use this function and maintain motor operation, place the following switches in these positions:

•AFC-Off-Bypass: Set the switch to Bypass to run the motor at full speed across the line.

•Test-Normal: Set the switch to Test.

•Hand-Off-Auto: Set the switch to Hand. Use the manual speed potentiometer to change the speed reference and observe power converter operation.

Fire/Freezestat Interlock Description

User terminals are supplied for accepting a user supplied fire/freezestat interlock (normally closed). When the user supplied contact is opened the drive output isolation contactor and bypass contactor open and the motor stops.

187

© 2000–2003 Schneider Electric All Rights Reserved