GE RPV311, Technical Manual

Page: 31 / 295

Chapter 2
– Safety Information
RPV311
RPV311-TM-EN-7 31
3.4 Equipment Connections
Terminals exposed during installation, commissioning
and maintenance may present a hazardous voltage
unless the equipment is electrically isolated.
Tighten M3 clamping screws of heavy duty terminal block
connectors to a nominal torque of 1.0 Nm.
Tighten captive screws of header-type (Euro) terminal blocks
to 0.5 Nm minimum and 0.6 Nm maximum.
Always use insulated crimp terminations for voltage and
current connections.
Always use the correct crimp terminal and tool according to
the wire size.
In order to maintain the equipment’s requirements for
protection against electric shock, other devices connected to
the RPV311 and RA33x shall have protective class equal or
superior to Class I.
Watchdog (self-monitoring) contacts are provided to indicate
the health of the device on some products. We strongly
recommend that you hard wire these contacts into the
substation's automation system, for alarm purposes.
Earth the equipment with the supplied PCT (Protective
Conductor Terminal).
Do not remove the PCT.
The PCT is sometimes used to terminate cable screens.
Always check the PCT’s integrity after adding or removing
such earth connections.
The user is responsible for ensuring the integrity of any
protective conductor connections before carrying out any
other actions.
The PCT connection must have low-inductance and be as
short as possible. For best EMC performance, ground the
unit using a 10 mm (0.4 inch) wide braided grounding strap.