KEB combivert R6-S, Инструкция по эксплуатации

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2.3 Electrical connection
Note Capacitor
Discharge Time
Before any installation and connection work, the system must be switched off and secured.
After switch off, the intermediate circuit capacitors are still charged with high voltage for a
short period of time. The unit can be worked on after it has been switched off for 5 minutes.
Secure
Isolation
The terminals of the control terminal strip are securely isolated in accordance with EN
61800-5-1. With existing or newly wired circuits the person installing the units or machines
must ensure the EN requirements are met. When used together with frequency inverters
that are not isolated from the supply circuit, all control lines must be secured by other
protective measures (e.g. double insulation or shielded, earthed and insulated).
Voltage With
Respect to
Ground
Connection of the COMBIVERT R6 is only permissible on symmetrical networks with a
maximum line voltage (L1, L2, L3) with respect to ground (N/GND) of 305V. An isolating
transformer must be used for networks which exceed this value! The unit may be damaged
if this is not observed.
Grounded Delta
Supply
Connection of the R6 series inverters to voltage systems configured as a corner grounded
delta, center tap grounded delta, open delta, or ungrounded delta may defeat the internal
noise suppression of the inverter. Increased high frequency disturbance in the controller
and on the line may be experienced. A balanced, neutral grounded wye connection
is required . The three phase voltage imbalance must be less than 2% phase-to-phase.
Greater imbalance can lead to damage of the inverter's power circuit.
It is acceptable to use a transformer with a WYE connection on the secondary.
Example of a center grounded wye transformer:
x
1
x
2
x
3
x
0
Stationary
connection
The COMBIVERT R6 is designed for fixed connection only as high frequency ground
leakage currents of > 3.5 mA may occur especially when using EMI filters. It is therefore
necessary to use a ground conductor with a section of at least a #4 AWG (16mm
2
) copper
conductor or a second ground conductor in compliance with EN 61800-5-1. Ground point-
to-point with the shortest connection possible to the main ground point in the system (avoid
ground loops).
Insulation
Measurement
When doing a high voltage insulation measurement in accordance with VDE 0100 / Part
620, the power semiconductor of the unit and existing radio interference filters must be
disconnected because of the danger of destruction. This is permissible in compliance with
the standard, since all units are given a high voltage test during the quality testing at KEB
in accordance with EN 50178.
US - 10
2. Safety Instructions