System Integration; Operating Environment: Vlt ® Integrated Servo Drive Isd 510; Humidity; Ambient Temperature - Danfoss VLT ISD 510 Design Manual

System Integration

4 System Integration
4.1 Operating Environment: VLT
Integrated Servo Drive ISD 510

4.1.1 Humidity

®
Although the VLT Integrated Servo Drive ISD 510 can
operate properly at high humidity, avoid condensation.
There is a specific risk of condensation when the servo
drive is colder than moist ambient air. Moisture in the air
can also condense on the electronic components and
cause short circuits. Condensation occurs in units without
power. Avoid installation in areas subject to frost. Alterna-
tively, operating the servo drive in standby mode (with the
servo drives connected to the auxiliary power supply via
the SAB) reduces the risk of condensation. Ensure that the
power dissipation is sufficient to keep the servo drive
circuitry free of moisture.

4.1.2 Ambient Temperature

Minimum and maximum ambient temperature limits are
®
specified for the VLT Integrated Servo Drive ISD 510 (see
chapter 6.1.4 General Specifications and Environmental
Conditions). Avoiding extreme ambient temperatures
prolongs the life of the equipment and maximizes the
overall system reliability. Follow the recommendations
listed for maximum performance and equipment longevity.
•
Although the servo drive can operate at temper-
atures as low as 0 °C, proper operation at rated
load is only guaranteed at ≥5 °C.
•
Do not exceed the maximum temperature limit.
•
The lifetime of electronic components decreases
by 50% for every 10 °C operated above the
design temperature.
•
Devices with IP54, IP65, or IP67 protection ratings
must also adhere to the specified ambient
temperature ranges.
•
Additional air conditioning of the cabinet or
installation site may be required.
MG36C102
Design Guide

4.1.3 Cooling

®
The servo drives are self-cooling. Cooling (heat dispersal) is
primarily via the flange, with a small amount dispersed by
the housing. The following recommendations are necessary
for effective cooling of the units.
•
•
•
•
It is possible to install 2 or more servo drives next to each
other, however the surfaces of the servo drives must not
be in contact with each other. Ensure that there is a
minimum gap of 1.2 mm between the servo drives to
provide adequate ventilation of the servo drives and to
allow sufficient heat transfer to take place in the
surrounding areas.
Illustration 4.1 Example of Servo Drive Installation on the
Same Flange

4.1.4 Motor-generated Overvoltage

The DC voltage in the intermediate circuit (DC bus)
increases when the servo drive acts as a generator. This
can occur in 2 ways:
•
•
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Maximum air temperature to enter enclosure
must never exceed 55 °C (131 °F).
Day/night average temperature must not exceed
35 °C (95 °F).
Mount the unit to allow for free cooling airflow.
Provide minimum front and rear clearance
requirements for cooling airflow.
The load drives the servo drive when it is
operated at a constant speed. This is referred to
as an overhauling load.
During deceleration, if the inertia of the servo
drives is high and the deceleration of the servo
drives is set to a high value.
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