Screw-Type Terminals; Double Leaf-Spring-Crimp Contacts - Siemens SIPROTEC 7SS522 V4.6 Manual

Design and Connection System
2.3.2.1

Screw-Type Terminals

Connection The voltage connections of the central unit and the voltage and current connections of
the bay units have screw terminals. For assignment of the terminals, please refer to
the Figures A-3, page 342 and A-5, page 345 in the Appendix.
Connection method Use copper conductors only!
You can use solid conductors or stranded conductors with end sleeves.
You can use end sleeves with plastic collar (acc. to DIN 46228 P. 1) that have a cross-
section between 0.5 mm
Use a screwdriver for slot-head screws size 6 × 1.
Tools
Use a crimping tool for end sleeves between 0.5 mm
AWG 20 to 10) with or without plastic collar.
2.3.2.2

Double Leaf-Spring-Crimp Contacts

Connection The voltage connections of the central unit and the voltage and current connections of
the bay units have double leaf-spring-crimp contacts. For assignment of the terminals,
please refer to the Figures A-3, page 342 and A-5, page 345 in the Appendix.
Connection method Use copper conductors only!
(current terminals)
Use stranded conductors with a cross-section between 1.5 mm
Use double leaf-spring-crimp contacts type L with 2 snap lugs that match the selected
conductor cross-sections.
Connection method Use copper conductors only!
(voltage
Use stranded conductors with a cross-section between 0.5 mm
terminals)
Use double leaf-spring-crimp contacts that match the selected conductor cross-sec-
tions.
Tools Use a crimping tool for the double leaf-spring-crimp contacts.
26
2
Conductor Length (without collar)
cross-section
2
0.5 mm 10 mm
2
0.75 and 1 mm 12 mm
2
1.5; 2.5 and 4 mm 18 mm
2
and 4 mm (equivalent to AWG 20 to 12) and a length up to:
2 2
and 6 mm (equivalent to
2 2
and 2.5 mm
2 2
and 1 mm .
7SS52 V4 Manual
C53000-G1176-C182-3
.