Schneider Electric 58 TRX manual Output Wiring Precautions, 106

Altivar® 58 TRX AC Drives

Wiring Recommendations

Ratings for Input Line Currents, Type N 400 to 460 Vac

Three-Phase Input with Three-Phase Output

	Dissipated Power at Rated	Short Circuit Rating	Input Line Current
Drive Controller Catalog Number	Load (Total)
	W	A RMS sym.	A	A
ATV58NU18N4•	57	5,000	3.4	2.6
ATV58NU29N4•	97	5,000	6	4.5
ATV58NU41N4•	120	5,000	7.8	6
ATV58NU54N4•	170	5,000	10.2	7.8
ATV58NU72N4•	210	5,000	13	10.1
ATV58NU90N4•	295	5,000	17	13.2
ATV58ND12N4•	360	22,000	26.5	21

Output Wiring Precautions

The drive controller is sensitive to the amount of capacitance (either phase-to-phase or phase-to- ground) present on the output power conductors. If excessive capacitance is present, the drive controller may trip on overcurrent.

Follow the guidelines below when selecting output cable:

•Cable type: the cable selected must have a low capacitance phase-to-phase and to ground. Do not use mineral-impregnated cable because it has a very high capacitance. Immersion of cables in water increases capacitance.

•Cable length: the longer the cable, the greater the capacitance. Cable lengths greater than 100 ft (30.5 m) may affect controller and/or motor performance. For installations where cable length capacitances may be a problem, installing a reactor between the drive controller and the motor will increase inductance and decrease capacitance between cable conductors.

•Proximity to other output cables: because of high frequency switching and increased capacitance, the drive controller may fault under some conditions.

•Do not use lightning arrestors and/or power factor correction capacitors on the output of the drive controller.

NOTE: Provide at least 20 in. (500 mm) of cable at the drive controller output (U, V, W).

Grounding

For safe, dependable operation, ground the drive controller according to National Electrical Code and all local codes. To ground the drive controller:

•Connect a copper wire from the ground terminal on the drive controller (see the terminal locations on page 18) to the power system ground conductor. Wire size is determined by the drive controller size and by national and local codes.

•Verify that resistance to ground is one ohm or less. Improper grounding causes intermittent and unreliable operation.

.

YES

Drive Controller

Drive Controller

Drive Controller

	NO
Drive Controller		Drive Controller
Drive Controller		Drive Controller

Drive Controller

Ground multiple drive controllers as shown in the figure to the left. Use one grounding conductor per device. Do not loop ground conductors or install them in series

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