Connections Of The Voltage Terminals; Connection Of The Temperature Sensors To The I/O 2 Extension Module - Siemens SIPROTEC 7SK80 Manual
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3.1.2.3 Connections of the Voltage Terminals
Fixing Elements
The fixing elements for the voltage transformer connection are part of the voltage terminal (housing side). They
have a stress-crack- and corrosion-resistant alloy. The head shape of the terminal screw allows for using a flat
screwdriver (4.0 mm x 0.8 mm / 0.16 in x 0.031 in) or a crosstip screwdriver (PZ1). PZ1 is recommended.
Cable Lugs and Wire Cross-sections
The connection mode available is the connection as single cable. As single cables, solid conductors as well as
stranded conductors with or without conductor sleeves can be used. For the connection of two single cables
we recommend to use twin connector sleeves.. We recommend twin connector sleeves of the PN 966 144
range from Tyco Electronics.
When connecting single cables, the following cross-sections are allowed:
Cable cross-sections:
Conductor sleeve with plastic sleeve
Stripping length:
(when used without conductor sleeve)
With vertically arranged terminal points, single conductors and short circuit links (order no. C53207-A406-
D194-1) can be connected together. Make sure that the short circuit links are connected in alternate sides.
Mechanical Requirements
The fixing elements and the connected components are designed for the following mechanical requirements:
Permissible tightening torque at the terminal screw
Permissible traction per connected conductor
3.1.2.4 Connection of the temperature sensors to the I/O 2 extension module
Remove the external insulation from the shielded cable over a length of approx. 5 cm.
Cut the cable shielding to approx. 4 cm in length and protect the open end by means of a shrink tube, insulating
tape or a similar material. Make sure that the approx. 1 cm of the shielding remains open for the grounding.
Remove the internal insulation of the signaling leads over a length of approx. 1 cm.
Crimp appropriate conductor sleeves onto the ends of the inner conductors.
Guide the cables through the openings of the shield cap and then connect the inner conductors as shown in
the wiring diagram.
Plug the cap onto the voltage terminals.
Clamp the free part of the cable shielding underneath the cable clamp next to the connector on the shield cap.
Next, plug the complete clamp into the retaining clips on the rear panel.
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
Mounting and Commissioning
3.1 Mounting and Connections
2
AWG 20-14 (0.5 mm
to 2.0 mm
L = 10 mm (0.39 in) or L = 12 mm (4.47 in)
12 mm (0.47 in)
Only copper cables may be used.
1.0 Nm (8.85 lb.in)
50 N based on IEC 60947-1 (VDE 660, Part
100)
2
)
295
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