Siemens SIPROTEC 7SJ62 Instruction Manual

Installation and Commissioning
8-4 7SJ62 Manual
C53000-G1140-C121-1
q Remove the four covers on the corners of the front cover of the device. Four elon-
gated holes in the mounting angle strips become accessible.
q Fasten the device to the mounting brackets with four screws.
q Replace the four covers.
q Tighten the mounting brackets to the rack using 8 screws.
q Connect the ground on the rear plate of the device to the protective ground of the
rack. Use at least one M4 screw for the device ground. The cross-sectional area of
the ground wire must be greater than or equal to the cross-sectional area of any oth-
er control conductor connected to the device. Furthermore, the cross-sectional area
of the ground wire must be at least AWG 13.
q Connect the plug terminals and/or the threaded terminals on the rear side of the de-
vice according to the elementary diagram for the rack.
When using spade lugs or directly connecting wires to threaded terminals, the
screws must be tightened so that the heads are even with the terminal block before
the lugs or wires are inserted.
A ring lug must be centered in the connection chamber so that the screw thread fits
in the hole of the lug.
Section 2.1 has pertinent information regarding wire size, lugs, bending radius (fiber
cables), etc.
Panel Surface
Mounting
q Secure the device to the panel with four screws. Refer to Figure 10-8 in Section
10.19 for dimensions.
q Connect the ground of the device to the protective ground of the panel. The cross-
sectional area of the ground wire must be greater than or equal to the cross-sec-
tional area of any other control conductor connected to the device. Furthermore, the
cross-sectional area of the ground wire must be at least AWG 13.
q Solid, low impedance operational grounding (cross-sectional area ≥ AWG 13) must
be connected to the grounding surface on the side. Use at least one M4 screw for
the device ground.
q Connect the threaded terminals on the top and bottom of the device according to
the elementary diagram for the panel. Section 2.2 has pertinent information regard-
ing wire size, lugs, bending radius (fiber cable), etc.
8.1.2 Connections
Currents/Voltages CT and VT connections for a 7SJ62 are shown in the Appendix, Section A.3. Figures
A-6 to A-10 show examples of current transformer circuit connections for grounded,
ungrounded, and compensated (European practice with arc suppression/Petersen-
coils) power systems using two or three CTs. Figures A-11 to A-15 show examples of
VT connections. The device can either be connected with three phase-ground voltag-
es as shown in Figure A-11, or with two phase-phase voltages and 3V
0
(also called
the displacement voltage) from open delta VTs as shown in Figure A-12. For the latter,
only the phase-phase voltages can be connected as shown in Figure A-13 (open delta
VTs), or only 3V
0
can be connected as illustrated in Figure A-15 in the device settings.
The appropriate voltage connection must be entered under Address , 97&RQ
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Siemens SIPROTEC 7SJ62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SJ62
Category	Relays
Language	English