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4 - PHYSICAL AND ELECTRICAL DATA
Electrical data notes and operating conditions, 30XW-VZE / 30XWHVZE units
• The unit has one connection point per circuit.
• The main switch disconnector and the main short circuit protection are not included
in the electrical cabinet.
• Field connections: All connections to the system and the electrical installations
must be in full accordance with all applicable codes.
• The unit is designed and built to ensure conformance with local codes. The
recommendations of European standard EN 60204-1 (corresponds to IEC 60204-
1) (machine safety - electrical machine components - part 1: general regulations)
are specifically taken into account, when designing the electrical equipment
• The absence of the main disconnect switch is an exception that shall be considered
at the building installation level.
• Compliance of the installation to 1999/92/CE directive on minimum requirements
for improving the safety and health protection of workers potentially at risk from
explosive atmospheres: The electrical equipment is not designed for compliance
to 2014/34/EU directive for equipment and protective systems intended for use
in potentially explosive atmospheres. The compliance of the building installation
with article 3 Prevention of and protection against explosions shall be achieved
by all necessary measures in the installation for prevention of the formation of
explosive atmospheres
• Annex B of EN 60204 1 describes the electrical characteristics used for the
operation of the machines. The ones described below apply to 30XW-VZE /
30XWHVZE units and complement other information in this document:
The operating environment for the units is specified below:
1. Environment as classified in EN 60721 (corresponds to IEC 60721)
- indoor installation
- ambient temperature range: minimum temperature +5°C to +42°C, class AA4
- altitude: lower than or equal to 2000 m
- presence of water: class AD2 (possibility of water droplets)
- presence of hard solids, class 4S2 (no significant dust present)
- presence of corrosive and polluting substances, class 4C2 (negligible)
2. Power supply frequency variation: ± 2 Hz.
3. The neutral (N) line must not be connected directly to the unit (if necessary
use a transformer).
4. Overcurrent protection of the power supply conductors is not provided with
the unit.
Greyed text does not apply to units equipped with option 330 (Low GWP A1 R-515B refrigerant)
5. The unit is designed for connection to TN systems (IEC 60364). For IT systems
the earth connection must not be at the network earth. Provide a local earth,
consult competent local organisations to complete the electrical installation.
6. Electromagnetic environment: classification of the electromagnetic environment
is described in standard EN 61800-3 (corresponds to IEC 61800-3):
- Immunity to external interference defined by the second environment
- Interference emission as defined in category C3*
• Due to the harmonic currents the integrated frequency variator in the unit is a
source of interference. An analysis may be required to verify if these interferences
exceed the compatibility limits of the other devices connected to the same power
(1)
.
supply network. The compatibility levels inside an electrical installation, that must
be met at the in-plant coupling point (IPC) to which other loads are connected are
described in standard 61000-2-4. Two characteristics are required for this analysis:
- The short-circuit ratio (Rsce) of the installation calculated at the in-plant coupling
point (IPC).
- The total harmonic current distortion rate (THDI), calculated for the machine at
maximum capacity.
• Derived currents: If protection by monitoring the leakage currents is necessary to
ensure the safety of the installation, the presence of derived currents introduced
by the use of frequency variators in the unit must be considered. In particular the
reinforced immunity protection types and a control value not lower than 150 mA
are recommended to control differential protection devices.
NOTE: If particular aspects of an actual installation do not conform to the
conditions described above, or if there are other conditions which should be
considered, always contact your local Carrier representative.
(2)
:
(1) Generally the recommendations of IEC 60364 are accepted as compliance with
the requirements of the installation directives. Conformance with EN 60204-1
is the best means of ensuring compliance with the Machinery Directive.
(2) The required protection level for this class is IP21B or IPX1B (according to
reference document IEC 60529). All 30XW-VZE/30XWHVZE have IP23 units
fulfil this protection condition.
(3) Example of installations of the second environment: industrial zones, technical
locations supplied from a dedicated transformer.
*
Category C3 is suitable for use in an industrial environment and is not designed
for use in a public low-voltage system that supplies residential locations. As an
option, conformity with category C2 permits this type of installation.
(3)
15
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