Bypass Circuit; Potential At Control Voltage Connections; Start-Up; Prerequisites For Commissioning - Helios FU-BS Series Manual

Installation and Operating Specification FU Basic
5.12

Bypass circuit

Please observe the following during bypass switching (controller shunt with mains voltage):
• Mutual locking of mains contactor and bypass protection.
Time delay of at least 1 second during switching.
•
When the contactor is switched off at the inverter output, the "enable" (ON / OFF) must also be
•
opened and closed again when it is switched back on. When switching off, wait at least 90 seconds
before switching back on!
Never apply line voltage to the inverter output!
•
5.13

Potential at control voltage connections

The connections for the control voltage (< 30 V) relate to the common GND potential (exception: relay
contacts are potential-free). There is a potential isolation between the connections for the control
voltage and the PE conductor. It must be ensured that the maximum external voltage at the con-
nections for the control voltage cannot exceed 30 V (between the "GND" and "PE" conductor
terminals). A connection to the PE conductor potential can be made if required; fit a bridge between
the "GND" terminal and the "PE" connection (terminal for shield).

6 Start-up

6.1

Prerequisites for commissioning

Attention!
1. You must mount and connect the device in accordance with the operating instructions.
2. Double check that all connections are correct.
3. The mains voltage must match the information on the rating plate.
4. The rated current on the rating plate will not be exceeded.
5. Make sure that no persons or objects are in the hazardous area.
L-BAL-E187-GB 2004 Index 003 Part.-No.
14/22
Start-up