Micom P631, Technical Manual

Page: 539 / 638

10 COMMISSIONING
10.1 Safety Instructions
Danger!
⚫
Only qualified personnel, familiar with the “Warning” page at the beginning of
this manual, may work on or operate this device.
Danger!
⚫
When installing and connecting the device the warning notices at the
beginning of Chapter “Installation and Connection” (
Chapter 5, (p. 5-1) ) must
be observed.
Danger!
⚫
The device must be reliably grounded before auxiliary voltage is turned on.
The surface-mounted case is grounded using the bolt and nut, appropriately
marked, as the ground connection. The flush-mounted case must be grounded
in the area of the rear sidepieces at the location provided. The cross-section of
the ground conductor must conform to applicable national standards. A
minimum cross section of 2.5 mm² (US:
AWG12 or thicker) 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 device. The cross-section
of this ground conductor must also conform to applicable national standards.
A minimum cross section of 1.5 mm² (US:
AWG14 or thicker) is required.
Danger!
⚫
Before working on the device itself or in the space where the device is
connected, always disconnect the device from the supply.
Danger!
⚫
The secondary circuit of live system current transformers must not be opened!
If the secondary circuit of a live CT is opened, there is the danger that the
resulting voltages will endanger personnel and damage the insulation.
For pin-terminal connection devices, the terminal block for connection to the
current transformers is not a shorting block. Therefore always short-circuit
current transformers before loosening the threaded terminals.
Danger!
⚫
The power supply must be turned off for at least 5 s before power supply
module V is removed. Otherwise there is the danger of an electric shock.
Danger!
⚫
When increased-safety machinery is located in a hazardous area the P631
must always be installed outside of this hazardous area.
P631
P631/EN M/R-11-C // P631-310-650 10-1