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WECM / Emerald eZA Manual | 7
5.1. POWER CONNECTIONS
DANGER!
Connect the motor properly to the power supply by means of safe and permanent contacts, always considering
the data informed on the nameplate, such as rated voltage, wiring diagram, drive inputs, among others.
For power cables, switching and protection devices dimensioning, consider the rated motor current, the service factor, and
the cable length, among others. For motors without terminal block, insulate the motor terminal cables by using insulating
materials that are compatible with the insulation class informed on the nameplate. The minimum insulation distance between
the non-insulated live parts themselves and between live parts and the grounding must meet the applicable standards and
regulations for each country.
Make the power connections following nameplate indication.
Three-phase:
Power input: L1, L2 and L3 terminals
Protective earth: PE - green screw
If used, connect the optional external harmonic filter (passive PFC) in series to the line conductor.
WEG declares that the WECM / Emerald eZA motor line is intended to be used as a part of an end-product and thus is
not an independently used machine. All cables of this product need to be internally installed into the enclosure of the final
product.
DANGER!
Always connect the equipment to the ground protection (PE).
ATTENTION!
The power supply that feeds the inverter shall have a solid grounded neutral.
5.2. CONTROL CONNECTIONS
Make the control connections following nameplate indication.
Three-phase:
DC voltage: VDC and GND terminals
DC current: ADC and GND terminals
Frequency duty-cycle / PWM: PWM and GND terminals
Speed feedback (reference): REF and GND terminals
10 VDC source: 10 V and GND terminals
24 VDC source: 24 V and GND terminals
RS485 communication: 485+, 485- and GND terminals
Alarm relay: NO, NC and COM terminals
5.3. EMC REQUIREMENTS FOR CONFORMING INSTALLATIONS
The standard Three-phase WECM / Emerald eZA mounting solution (drive attached to the motor) comply with EN IEC
61800-3 / FCC requirements.
For optional decentralized mounting, the product class may change and the product may require the use of external
filters. Consult WEG for the solution that better comply with your installation requirements.
WECM / Emerald eZA product may require the use of an external filter to comply with
harmonic current emissions
requirements (EN61000-3-2).
Consult WEG about optional external filters.
Power
Conducted
Radiated
2,2 kW – 4 kW
C3
C3
Table 4 - EMC Class - IEC100
To meet the EMC levels in the Table 4, it is necessary to strictly comply with the installation configuration requirements
below mentioned:
The maximum permissible cable lenght of the power supply must be within a maximum distance of 3 meters.
Grounding must be carried out on the drive cover in an isolated manner.
Measurements must be carried out under load, providing the air velocity over the motor as specified in the design.
NOTE!
The end user takes personal responsibility for the EMC compliance of the whole installation.
