Hardware Modifications - Siemens SIPROTEC 7SJ62 Instruction Manual
Multi-functional protective relay with bay controller
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Also See for SIPROTEC 7SJ62:
- Manual (704 pages) ,
- Technical data manual (58 pages) ,
- Manual (94 pages)
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Installation and Commissioning
Trip Circuit
Monitoring
8.1.3
Hardware Modifications
Power Supply
Voltage
Nominal Currents
8-6
Selector Switch for
Setting Group changeover
A
B
V+
C
D
A
B
V+
C
D
Figure 8-3
Connection Diagram (Example) for Setting Group Changeover with Binary In-
puts
One or two binary inputs can be used for monitoring a circuit breaker trip coil. An alarm
can be given if the coil is interrupted when the breaker circuit position is closed or open
(2 inputs used).
When one binary input is used for trip circuit monitoring, the calculation for the neces-
sary resistance R must be done according to Sub-section 6.17.2.2. A resistor with the
necessary value must be included in the circuit branch with 52/b as shown in Figure
6-60, Sub-section 6.17.1.5.
For either method of trip circuit monitoring, the components are connected in series -
the two binary inputs or the binary input and the resistor R. The pickup threshold of the
binary inputs must be less than half of the nominal value of the DC control voltage.
Hardware adjustments might be necessary or desired. For example, a change of the
pickup threshold for some of the binary inputs might be advantageous in certain appli-
cations. Terminating resistors might be required for the communication bus. In either
case, hardware modifications are needed. The modifications are done with jumpers
on the printed circuit boards inside the 7SJ62. Follow the procedure below, "Jumpers
on the Printed Circuit Boards", whenever hardware modifications are done.
There are different ranges for the input voltage of the various power supplies. Refer to
the data for the 7SJ62 ordering numbers in Section A.1 of the Appendix. The power
supplies with the ratings [60/110/125 VDC] and [110/125/220/250 VDC 115 VAC] are
interchangeable. Four jumper settings determine the rating. The settings necessary to
convert one range to the other are provided below, "Jumpers on the Printed Circuit
Boards". When the device is delivered, these jumpers are set according to the name-
plate sticker. Typically, these settings are not changed.
The rating of the current input transformers of the device can be changed to 1 A or 5
A with jumper settings that determine the secondary loading of the transformers. The
physical arrangements of these jumpers that correspond to the different current rat-
ings are described below, "Jumpers on the Printed Circuit Boards".
V–
&Ã
Binary input set for:
3Tr‡ÃB…‚ˆƒÃ7v‡Ã
"
", High
7SJ62
V–
'Ã
Binary input set for:
3Tr‡ÃB…‚ˆƒÃ7v‡Ã
"
", High
7SJ62 Manual
C53000-G1140-C121-1
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