Siemens SIPROTEC 7SS60, Руководство пользователя

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Installation and Commissioning
7-2
7SS60 Manual
E50417-G1176-C132-A1
7.1 Installation and connection
Prerequisites The rated data of the device have been checked as described in section 3.2.1, and
their conformity with the station data has been verified. Please note also the prerequi-
sites stated in section 9.4.
7.1.1 Measuring system
Panel flush
mounting or
cubicle mounting q Slip away the covering caps at the top and bottom of the front panel, making acces-
sible 4 elongated holes.
q
Insert the unit into the panel cutout or cubicle mounting frame and fix with four
screws (a dimension drawing is shown in Figure 9-1.
q
A solid low-resistant and low-inductive operating earth has to be connected to the
housing’s rear wall using at least one of the two M4 screws. Earth tapes according
to DIN 72333 Form A are suitable for this.
q
Make electrical connections via the screw terminals of the housing. Special atten-
tion has to paid to the designations of the connection modules, the permissible con-
ductor cross-sections and tightening torque (refer also to chapter 2). Use copper
conductors only!
q
The shielding of the serial RS485 interface must be earthed.
Auxiliary voltage Three different ranges of auxiliary voltage can be delivered (refer to chapter 9 and
A.4). If, for exceptional reasons, the rated voltage of the supply input is to be changed
to adapt it to the station conditions, it must be taken into account that the models for
rated auxiliary voltage 60/110/125 Vdc and 220/250 Vdc differ from each other by dif-
ferent plug jumpers. The assignment of the jumpers to the rated voltage levels, and
their location on the p.c.b., is shown in Figure A-5.
The model for 220/250 Vdc is suitable for 115 Vac, too. When the device is delivered,
all the jumpers are correctly located and matched to the specification given on the rat-
ing plate, so that normally none of them need to be altered.
Control voltage for
binary inputs When the device is delivered from the factory, the binary inputs are set to operate with
a dc control voltage in the whole operating range between 17 V and 288 V. If the sta-
tion control voltage has a higher rating (
≥
110 Vdc), it may be useful to set a higher
pick-up threshold of the binary inputs to increase the static signal-to-noise ratio. This
helps to avoid spurious pick-up by interference voltages that may be caused e.g. by
earth fault monitoring systems operating in parallel to the device.
Warning!
Trouble free and safe use of this SIPROTEC device depends on proper transport,
storage, installation, and application of the device according to the warnings in this in-
struction manual.
Of particular importance are the general installation and safety regulations for work in
a high-voltage environment (for example, ANSI, IEC, EN, DIN, or other national and
international regulations.) These regulations must be observed. Failure to observe
these precautions can result in death, personal injury, or severe damage of property.