Areva MiCOM C232 - 9 Commissioning; 9.1 Safety Instructions

9 Commissioning
C232-302-401/402/403/404-603 / C232/EN M/A23 9-1
9 Commissioning
9.1 Safety Instructions
The device must be reliably grounded before auxiliary voltage is turned on.
The surface-mounted case is grounded using the appropriate bolt and nut as the ground
connection. The flush-mounted case must be grounded in the area of the rear
sidepieces at the location provided. The cross-sectional area of this ground conductor
must also conform to applicable national standards. A minimum conductor cross section
of 2.5 mm
2
is required.
In addition, a protective ground connection at the terminal contact on the power supply
module (identified by the letters “PE” on the terminal connection diagram) is also
required for proper operation of the unit. The cross-sectional area of this ground
conductor must also conform to applicable national standards. A minimum cross section
of 1.5 mm
2
is required.
Before working on the device itself or in the space where the device is connected,
always disconnect the device from the supply.
The secondary circuit of operating current transformers must not
be opened. If the
secondary circuit of an operating current transformer is opened, there is the danger that
the resulting voltages will endanger people and damage the insulation.
The threaded terminal block for current transformer connection is not
a shorting block.
Therefore always short-circuit current transformers before loosening the threaded
terminals.
!
The fiber-optic interface may only be connected or disconnected when the supply
voltage for the unit is shut off.
!
The PC interface is not designed for permanent connection. Consequently the socket
does not have the extra insulation from circuits connected to the system that is required
per VDE 0106 Part 101. Therefore when connecting the connecting cable make sure
that you do not touch the socket contacts.
!
Application of analog signals to the measuring inputs must be in compliance with the
maximum permissible rating of the measuring inputs (see chapter entitled 'Technical
Data').