Siemens 7SR242 Reyrolle Transformer Protection Numerical Relay
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Siemens 7SR242 Reyrolle Transformer Protection Numerical Relay Price And Quantity
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Product Description
Description:7SR242 Transformer Protection Relay
The 7SR242 is used as a protection, control and monitoring relay for two winding transformers of all vector groups, primary configurations/connections and earthing connections. The relay functionality also allows its application in auto-transformer and reactor protection schemes. Relays are housed in size E8 or E10 cases. Integrated logic is provided to allow the optimal configuration of relay functionality with the relays analogue inputs and binary input/output circuits. Protection, control, instrumentation and metering functionality is accessible via data comm channel(s). A front USB port for local PC connection or rear electrical RS 485 port for remote connection are provided. Additional rear port options are available.
Function:
PROTECTION FUNCTIONS
- Over-fluxing (24)
- Under/Over-voltage (27/59)
- Undercurrent (37)
- Negative Phase Sequence Overcurrent (46NPS)
- Thermal Overload (49)
- Overcurrent (50, 51)
- Earth Fault (50G, 50N, 51G, 51N)
- Neutral Voltage Displacement (59N)
- High Impedance REF (64H)
- Biased Differential (87BD)
- High-set Differential (87HS)
- Circuit Breaker Fail (50BF)
- Trip Circuit Supervision (74TC)
- Inrush Detector (81HBL2)
- Over-fluxing Detector (81HBL5)
MONITORING FUNCTIONS
- Primary/Secondary Currents Phases and Earth Direction
- Relay operate and restraint currents
- Positive Phase Sequence (PPS) Current
- Negative Phase Sequence (NPS) Current
- Zero Phase Sequence (ZPS) Current
- Thermal status
- Primary/Secondary Single Phase Voltage
- Frequency and Fluxing
- Historical Demand Record
FEATURES
- Cold Load Settings
- Eight Settings Groups
- Password Protection - 2 levels
- User Programmable Logic
- Self Monitoring
- Circuit Breaker Trip Counters
- Fault, event and waveform records
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