GE DR60, Technical Manual

Page: 19 / 124

DR60
19 DR60-TM-EN- 2A
CTs must NOT be fused since open circuiting them may produce
lethal hazardous voltages.
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
DR60 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.