Siemens 7SR242 - Table 1-1: 7 SR242 Ordering Options

7SR242 Duobias Description Of Operation
©2010 Siemens Protection Devices Limited Chapter 1 Page 7 of 52
Table 1-1: 7SR242 Ordering Options
DUOBIAS-M 7
S
R
2
4
2
□
-
2 □
A □
□
- 0 □
A
0
▲
▲
▲
▲
▲
▲
▲
▲
▲
Multifunctional 2 winding
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transformer differential Protection Product
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protection Transformer
4
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Relay Type
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Differential (2 winding)
2
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Case I/O and Fascia
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E8 case, 6 CT, 2 EF/REF CT, 1 VT, 9 Binary Inputs / 6 Binary Outputs,
16 LEDs
2
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E10 case, 6 CT, 2 EF/REF CT, 1 VT, 19 Binary Inputs / 14 Binary Outputs,
24 LEDs
3
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Measuring Input
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1/5 A, 63.5/110V, 50/60Hz
2 | | | | |
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Auxiliary voltage
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30 to 220V DC, binary input threshold 19V DC
A | | | |
30 to 220V DC, binary input threshold 88V DC
B | | | |
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Communication Interface
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Standard version – included in all models, USB front port, RS485 rear port
1 | | |
Standard version – plus additional rear F/O ST connectors (x2) and IRIG-B
2 | | |
Standard version – plus additional rear RS485 (x1) and IRIG-B
3 | | |
Standard version – plus additional rear RS232 (x1) and IRIG-B
4 | | |
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Protocol
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IEC 60870-5-103 and Modbus RTU (user selectable setting)
1 | |
IEC 60870-5-103 and Modbus RTU and DNP 3.0 (user selectable)
2 | |
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Protection Function Packages
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Option A: Standard version – Included in all models
- 81HBL2 Inrush Detector
- 81HBL5 Overfluxing detector
- 87BD Biased current differential
- 87HS Current differential highest
Programmable logic
For each winding/circuit breaker
- 50BF Circuit breaker fail
- 64H High impedance REF
- 74TCS/CCS Trip/close circuit supervision
Option B
: Standard version – plus
- 37/37G Undercurrent
- 46BC Open circuit
- 46NPS Negative phase sequence overcurrent
- 49 Thermal overload
- 50 Instantaneous phase fault overcurrent
- 50G/50N Instantaneous earth fault
- 51 Time delayed phase fault overcurrent
- 51G/51N Time delayed earth fault
A
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B
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(continued on following page )