Thermal Protection; Vlt ® Servo Access Box; Grounding; Efficiency - Danfoss VLT ISD 510 Design Manual

System Integration
WARNING
LEAKAGE/GROUNDING CURRENT HAZARD
Leakage/grounding currents are >3.5 mA. Failure to
ground the SAB and the servo drives properly could
result in death or serious injury.
•
Ensure the correct grounding of the devices by
a certified electrical installer in accordance with
4 4
applicable national and local electrical
standards and directives and the instructions
contained in this manual.
Potential equalization
There is a risk of electrical interference when the ground
potential between the VLT
System and the machine is different. Install equalizing
cables between the system components. The
recommended cable cross-section is 16 mm

4.6.3 Thermal Protection

IGBT During the operation of the servo drive, the power
overtem- loss on the IGBT causes a temperature rise on the
perature IGBT. The servo drive monitors the IGBT
temperature constantly and, in case of overtem-
perature, stops operation and shows an IGBT
overtemperature error.
PCB 1 To protect the servo drive electronics from thermal
overtem- destruction, the temperature inside the electronic
perature housing is monitored. The servo drive shuts down
if the threshold level is reached.
PCB 2 To protect the servo drive electronics from thermal
overtem- destruction, the temperature inside the electronic
perature housing is monitored. The servo drive shuts down
if the threshold level is reached.
Motor The motor winding temperature is protected
winding against thermal runaway by constantly monitoring
overtem- its temperature. The servo drive stops operation if
perature the limit of winding temperature is reached.
Maximum Another method to prevent motor wire damage is
winding to monitor the power flow into the motor wire
energy and its time duration. After reaching a certain
energy level, the servo drive stops operation and
an error is issued.
Table 4.16 Thermal Protection
®
4.7 VLT
Servo Access Box

4.7.1 Grounding

See chapter 4.3.2.3 Grounding for Electrical Safety and
chapter 4.3.2.4 EMC Grounding for information on
grounding the SAB.
48
®
VLT Integrated Servo Drive ISD
®
Integrated Servo Drive ISD 510
2
.
Danfoss A/S © 08/2017 All rights reserved.
®
510 System

4.7.2 Efficiency

The efficiency of the SAB is >98% at the nominal current of
15 A.

4.8 Cables

®
The VLT Integrated Servo Drive ISD 510 System uses pre-
configured hybrid cables to connect the SAB to the 1
servo drive on each line. This hybrid cable combines the
DC link supply, the auxiliary voltage, the STO signal, and
the bus communication. The hybrid cables pass these
signals on to further servo drives connected in daisy-chain
concept.
There are 2 types of hybrid cables available with both
angled and straight M23 connectors:
•
Feed-in cable:
For connecting the 1
connection point on the SAB.
- Input end: Pigtailed with individual
connectors for connection to the
corresponding terminals on the SAB
- Output end: M23 connector (for
connection to the 1
line)
•
Loop cable:
For connecting the servo drives in daisy-chain
format in an application.
- Input end: M23 connector
- Output end: M23 connector
Both these cables are provided by Danfoss and are
available in various lengths.
See chapter 5.5.1 Flexible Hybrid Cable for cable specifi-
cations.

4.9 Peripheral Components

4.9.1 AUX Power Supply

Supply the SAB with a power supply unit with an output
range of 24–48 V DC ±10%. The output ripple of the
power supply unit must be <250 mV
units that conform to the PELV specification.
NOTICE
Use a supply that is CE-marked according to the
standards EN 61000-6-2 and EN 61000-6-4 or similar for
industrial use.
The power supply unit must be dedicated to the VLT
Integrated Servo Drive ISD 510 System, meaning that the
supply is used exclusively for powering the servo system.
st
st
servo drive of a line to the
st
servo drive on the
. Only use supply
pp
®
MG36C102