Protective Earth (Pe) Connection - Invertek Compact 2 Series User Manual

5.2. Protective Earth (PE) Connection

Grounding Guidelines

The ground terminal of each Optidrive should be individually connected DIRECTLY to the site ground bus bar (through the filter if installed).
Optidrive ground connections should not loop from one drive to another, or to, or from any other equipment.

Ground loop impedance must confirm to local industrial safety regulations.

To meet UL regulations, UL approved ring crimp terminals should be used for all ground wiring connections.

The drive Safety Ground must be connected to system ground.

Ground impedance must conform to the requirements of national and local industrial safety regulations and/or electrical codes.

The integrity of all ground connections should be checked periodically.
Protective Earth Conductor

The Cross sectional area of the PE Conductor must be at least equal to that of the incoming supply conductor.
PE Connection
The PE connection must be directly connected to ground. PE connection locations for each model are highlighted below.
Frame Size 1A and 1B
Safety Ground
This is the safety ground for the drive that is required by code. One of these points must be connected to adjacent building steel (girder, joist), a
floor ground rod, or bus bar. Grounding points must comply with national and local industrial safety regulations and/or electrical codes.
Motor Ground
The motor ground must be connected to one of the ground terminals on the drive.
Ground Fault Monitoring
As with all inverters, a leakage current to earth can exist. The Optidrive is designed to produce the minimum possible leakage current whilst
complying with worldwide standards. The level of current is affected by motor cable length and type, the effective switching frequency, the earth
connections used and the type of RFI filter installed. If an ELCB (Earth Leakage Circuit Breaker) is to be used, the following conditions apply: -

A Type B Device must be used

The device must be suitable for protecting equipment with a DC component in the leakage current

Individual ELCBs should be used for each Optidrive
Shield Termination (Cable Screen)
The safety ground terminal provides a grounding point for the motor cable shield. The motor cable shield connected to this terminal (drive end)
should also be connected to the motor frame (motor end). Use a shield terminating or EMI clamp to connect the shield to the safety ground
terminal.
5.3. Incoming Power Connection
Optidrive Compact Drive models are Over Voltage Category III according to EN60664-1:2007. Auxiliary circuits must be Over Voltage category II.
5.3.1. Cable Selection

For 1 phase supply, the mains power cables should be connected to L1/L, L2/N.

For 3 phase supplies, the mains power cables should be connected to L1, L2, and L3. Phase sequence is not important.

The cables should be dimensioned according to any local codes or regulations. Maximum dimensions are given in section 11.10 Electrical
Rating Tables on page 50.

The cable must be sufficient to carry the drive load current. Refer to section11.10 Electrical Rating Tables on page 50.

For compliance with CE and C Tick EMC requirements, refer to section 5.6 EMC Compliant Installation on page 16.

A fixed installation is required according to IEC61800-5-1 with a suitable disconnecting device installed between the Optidrive and the AC
Power Source. The disconnecting device must conform to the local safety code / regulations (e.g. within Europe, EN60204-1, Safety of
machinery).

For UL compliant installation, cables must be rated for continuous conductor temperature of 75ᵒC, copper only.
Optidrive Compact-2 Engineering Guide Issue 07.docx
Frame Size 1C
www.invertekdrives.com
Frame Size 2
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