Table of Contents
Advertisement
5 - ELECTRICAL CONNECTIONS
5.14 - Electrical data notes
• The units have a single power connection point located immediately upstream
of the main disconnect switch.
• The two electrical cabinets contain:
- A power supply disconnecting component : disconnect switch or circuit breaker
if option 70D was chosen.
- All or part of the equipment protecting the circuits inside the machine from short
circuits.
(1)
- Variable frequency drives to manage and protect against overload the
compressors, fans, and pumps motors,
- The switching equipment for the heaters and fans for the electrical equipment
- The control devices.
• Connections to the building installation:
Electrical installation and all the connections to the network must be carried out
in compliance with all standards applicable to the installation location. Generally,
the recommendations of the International Electrotechnical Commission document
(IEC60364) are accepted as compliance with the requirements of the installation
guidelines.
The units are designed and built to ensure compliance with these guidelines.
The European standard EN 60204-1 (corresponds to IEC 60204-1: Machine
safety - Electrical equipment of machines - Part 1: General requirements) was
specifically taken into account when the electrical equipment was designed.
NOTES
• The standard EN60204-1 enables the requirements of the Machinery Directive
to be met.
• Annex B of standard EN 60204-1 is intended to define the electrical characteristics
used for the operation of the machines. Those described below apply alongside
the other information provided in this document:
1. Environment
The classification of the environment is specified in standard IEC60364:
- Outdoor installation
,
(2)
- Ambient temperature range for the standard machine: From -20°C to +44°C
(48°C)
(3)
- Ambient temperature range for the machine with option 16: From -20 °C to
+48 °C (55 °C) (3),
- Altitude: Up to 1000 m (2000 m)
- Presence of solid foreign bodies: Class AE3 (no significant dust present)
- Presence of water: Class AD4 (projection in all directions without pressure)
- Presence of corrosive and polluting substances, class AF1 (negligible),
- Competence of personnel: BA4 (trained personnel).
2. Compatibility for low-frequency conducted disturbances according to class
2 levels as per IEC61000-2-4 standard:
- Power supply frequency variation: +-1Hz
- Phase imbalance: 2%
- Total Voltage Harmonic Distortion (THDV) : 8%
- Rated impulse voltage Uw (IEC60664-1) :
Units without option 16: 4kV
Units with option 16: 2.5kV.
3. The neutral wire (N) 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.
(4)
5. The factory-fitted disconnect switch is of a type suitable for power interruption
in compliance with EN 60947-3 (equivalent to IEC 60947-3).
6. The units are designed for connection to TN networks (IEC 60364). In IT
networks, the use of filters integrated into the variable frequency drive(s)
prevents the machines from fulfilling their intended purpose. In addition, the
equipment's short-circuit holding current characteristics have been modified.
Provide a local earth, consult competent local organisations to complete the
electrical installation.
7. Electromagnetic environment: The classification of the electromagnetic
environment is described in the standard EN61800-3 (equivalent to
IEC 61800-3):
- Immunity to external interference defined by the second environment
- Interference emissions as defined in category C3
• The units integrate variable frequency drives which have harmonic currents
which are a source of interference. An analysis may be required to verify if this
interference exceeds the compatibility limits of the other devices connected to
the same power 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 IEC 61000-2-4.
• Leakage currents: If protection by monitoring the leakage currents is necessary
to ensure the safety of the installation, the presence of DC voltage component
as well as additional derived currents introduced by the use of variable frequency
drive(s) in the unit must be considered. In particular it is recommended that the
differentiel protection devices are:
- Suitable for protection of DC and AC circuitry
- Of reinforced immunity protection types and/or set at a threshold value not
lower than 150 mA
NOTE: If particular aspects of an installation require different specifications
from those listed above (or which are not listed), always contact your Carrier
representative.
(1) With the exception of machines equipped with option 70D, a part of the short
circuit protection is not provided and must be carried out on the installation, in
compliance with the instructions given in this document.
(2) The required protection level for this class is IP43BW minimum (according to
the reference standard IEC 60529). All units are classified as IP44CW, and
fulfil this protection condition.
,
(2)
(3) The values in brackets correspond to operation with degraded thermal
(2)
performances.
(4) Above 1000m, the maximum temperature must be reduced by 0.5K for every
additional 100m up to 2000m,
(5) - Example of installations included in the first environment: Commercial and
residential buildings.
- Example of installations of the second environment: Industrial zones, technical
premises powered from a dedicated transformer.
(6) 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 or commercial
locations. As an option, conformity with category C2 permits this type of
installation.
WARNING: In a residential or commercial environment, this product may
cause radio interference in which case additional mitigation measures could
be required.
(5)
(6)
41
Advertisement
Table of Contents
