Connecting Analog Signals; Connecting Current And Voltage Inputs - ABB Relion 615 series Installation Manual

1MRS756375 K
5.4
5.4.1
615 series
Installation Manual
The earth lead should be as short as possible but notice that
extra length is required for door mounting.
Each IED must have its own earth lead connected to the earth
circuit connector.
2. Connect the earth lead to the earth bar.
Use either stripped wire screwed between a washer cup and the protective
earth screw or a ring-lug.
Select a suitable ring-lug to fit under the M4 screw.
3. Tighten the protective earth screw.
4. Support the earth lead so that it cannot break or weaken.
Be aware of the mechanical, chemical and electrochemical environment.

Connecting analog signals

A connection diagram is needed to connect the analog signals.
When using the ring-lug type for CT/VT terminals.
1. Open the lid that covers the ring-lug fixing screw with the tip of a
screwdriver. Every fixing screw has its own lid.
2. Remove the fixing screw.
3. Slide the screw through the terminal lug and screw it back on.
4. Close the lid.

Connecting current and voltage inputs

Connect the wires from the CTs/VTs to the correct device according to the phase
order and the connection diagram. Each terminal for CTs/VTs is dimensioned for
2
one 0.5...6.0 mm wire or for two wires of maximum 2.5 mm
See the specific card variants from the application manual.
Section 5
Connecting
2
.
53