Emerson COPELAND ZO18AG, Инструкции по применению

Страница: 25 / 38

20 AGL_Ref_ST_ZO_E_Rev00
4.4 Electro-magnetic compatibility (EMC) filter
The Emerson qualified EVM/EVH drive can fulfill RSCE120. The user needs to contact the
public grid supplier for permission.
For applications and job sites that are sensitive to electro-magnetic interference (EMI), an EMC filter
for the EVM/EVH drive is available as an accessory.
Input power cables to the drive should be kept away from the wiring harnesses going to the
compressor.
4.5 Line reactors
Line reactors are available as accessories. They reduce the risk of damage to the drive resulting
from poor phase balance or severe disturbances on the supply network. Particularly, they will help
in:
▪
reducing harmonic distortion of the input line current;
▪
improving input line current balance;
▪
reducing nuisance drive overvoltage trips caused by transient voltage spikes and power line
notches;
▪
protecting input rectifiers from in-rush current caused by sudden power line surges and sags;
▪
extending the life of the DC bus capacitor bank by reducing the internal heating caused by ripple
current;
▪
protecting motor windings from long lead effects when used on the drive output.
4.6 Motor insulation
The motor insulation material is class "B" (TF*) within maximum allowable operating temperatures
according to IEC 34-1 or DIN 57530.
4.7 Motor protection
Fuses must be installed before the drive.
The selection of fuses has to be made according to EN 60269-1 or EN 60204-1 and drive maximum
operating current (MOC). Not installing fuses before the compressor or selecting inappropriate fuses
may result in compressor failure.
A conventional inherent internal line break motor protection (Klixon) is provided.
4.8 Off-cycle power consumption
The drive will consume approximately 10 Watts from the drive power input line when the drive is
powered and there is no command for compressor or crankcase heating operation. The off-cycle
power can be eliminated by installing a contactor upstream of the drive and energizing the contactor
only when there is a call for compressor, capacitor or crankcase heating.
4.9 High-potential testing
WARNING
Conductor cables! Electrical shock!
Shut off power supply before high-
potential testing.
CAUTION
Internal arcing! Motor destruction!
Do not carry out high-voltage or
insulation tests if the compressor housing is under vacuum.
Emerson subjects all scroll compressors to a high-voltage test after final assembly. Each motor
phase winding is tested according to EN 60034-1 at a differential voltage of 1000 V plus twice the
nominal voltage.
Since high-voltage tests lead to premature ageing of the winding insulation, further additional tests
of that nature are not recommended. However, if it has to be done for any reason, it shall not be
made with the compressor charged with refrigerant. Carry out the test with a lower voltage, as
described above. Disconnect all electronic devices, eg, motor protection module, fan speed control,
drive, etc prior to testing.