Mains Supply Requirements; Fuses; Circuit Breakers - Danfoss VLT ISD 511 Operating Manual

VLT® Servo Drive System ISD 511
Operating Guide
POTENTIAL EQUALIZATION
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There is a risk of electrical interference when the ground potential between the servo system and the machine is different.
Install equalizing cables between them. The recommended cable cross-section is 16 mm
EMC INTERFERENCE
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Use shielded cables for control wiring and separate cables for power and control wiring. Failure to isolate power and control
wiring can result in unintended behavior or reduced performance.
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Ensure a minimum clearance of 200 mm between signal and power cables.
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Only cross cables at 90°.

5.5 Mains Supply Requirements

Ensure that the supply has the following properties:
• TN-S, TN-C, TN-CS, TT (not corner grounded) supply grounding system.
• For information on the use of an IT network with transformer, contact Danfoss.
• Prospective short circuit current: 5 kA.
• Protective class I.
• Grounded 3-phase mains network, 400–480 V AC ±10%.
• 3-phase lines and PE line.
• 3-phase frequency: 44–66 Hz
• Maximum input current for 1 PSM 510 at 30 kW: 55 A

5.5.1 Fuses

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Use fuses on the supply side of the Power Supply Module (PSM 510) that comply with CE and UL requirements (see
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When 2 PSM 510 modules are used, each PSM 510 must have its own dedicated set of fuses.
Table 12: Fuses
Model and power rating
PSM 510 (10 kW)
PSM 510 (20 kW)
PSM 510 (30 kW)

5.5.2 Circuit Breakers

Use a type B or type C circuit breaker with a capacity of 1.5 times the rated current of PSM 510 to fulfill CE requirements.
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Circuit breakers are not allowed in installations where C-UL is required. Only UL recommended fuses are allowed.
50 | Danfoss A/S © 2023.08
N O T I C E
N O T I C E
rms
N O T I C E
CE Compliance (IEC 60364)
Maximum fuse type
gG 25 A
gG 50 A
gG 63 A
N O T I C E
Electrical Installation
2
.
UL Compliance (NEC 2014)
Maximum fuse type
30 A (class T or J only)
50 A (class T or J only)
80 A (class T or J only)
AQ377148425069en-000101 / 130R1213
Table 12).