Danfoss VZH052 Manual page 16

Electrical data, connections and wiring
IP rating
Motor protection
Voltage imbalance
16
AB237586440343en-000601
The compressor terminal box IP rating according to IEC529 is IP22.
Element Numerals or letters
First characteristic
numeral
Second
characteristic
numeral
VZH scroll compressors are not equipped with
an internal motor protector. Motor protection
is provided by the variable speed drive. All
parameters are factory preset in order to
guaranty locked rotor or overload current
protection.
The maximum allowable voltage imbalance
between each phase is 3%. Voltage imbalance
causes high amperage over one or several
Meaning for the protection of equipment
Against ingress of solid foreign objects
0 (non protected)
1 ≥ 50 mm diameter
2 ≥ 12.6 mm diameter
3 ≥ 2.5 mm diameter
4 ≥ 1.0 mm diameter
5 dust protected
6 dust tight
Agains ingress of water with harmful effects
0 (non protected
1 vertically dripping
2 dripping (15° tilted)
3 spaying
4 splashing
5 jetting
6 powerful jetting
7 temporary immersion
8 continuous immersion
When a warning situation is reached in the
current control, the CDS frequency converter
will automatically reduce the compressor
speed in order to keep the motor current of the
compressor below the maximum allowed.
phases, which in turn leads to overheating and
possible drive damage.