7SR242 Duobias Transformer Protection Relay Energy Management
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Reyrolle Protection Devices! 7SR242 Duobias Transformer Protection Relay Energy Management

Unrestricted Siemens Protection Devices Limited

Our new generation of integrated transformer protection relays are designated the 7SR24 series. The relays utilise years of numeric relay protection experience with the 'Duobias' family of products. Housed in 4U high, size E8, E10 or E12 cases, these relays provide protection, control, monitoring, instrumentation and metering with integrated input and output logic, data logging & fault reports. Communication access to relay functionality is via a front USB port for local PC connection or rear electrical RS485 port for remote connection. Additional rear port options are available. 20...

Description of Functionality 50BF Circuit Breaker Fail The circuit breaker fail function may be triggered from an internal trip signal or from a binary input. Line and neutral currents are monitored following a trip signal and an output is issued if any current is still detected after a specified time interval. Alternatively, if the trip is from a mechanical protection the circuit breaker position can be used to determine a failure. A second time delay is available to enable another stage to be utilized if required. An input is also available to bypass the time delays when the circuit...

24 Over-Fluxing Two elements each provide a definite time lag (DTL) characteristic, the third element provides a user defined characteristic. Operates if Volts/Hertz ratio is above setting for duration of delay. 27/59 Under/Over Voltage Each element has settings for pickup level, drop-off level and Definite Time Lag (DTL) delays. Operates if voltage 'exceeds' setting for duration of delay. This function can be used within load shedding schemes. 37/37G Undercurrent Each element has settings for pickup level and Definite Time Lag (DTL) delays. Operates if current falls below setting for...

Serial Communications Reydisp Manager The relay offers a USB serial port as standard on the front of all units. All of the relays functions can be set on a PC using Reydisp Evolution via the relay USB port. The connection is made with a USB cable and operates with a ‘plug and play’ connection, so no pre-setting of the relay is required. The front port can be switched off or set to use either the MODBUS-RTU, IEC60870-5-103, DNP3.0 (optional) or ASCII protocols for testing purposes. A rear RS485 electrical connection is available on all units for system interface connections. An internal...

For full technical data refer to the Performance Specification Chapter of the Technical Manual. Unrestricted Siemens Protection Devices Limited 7

Binary Inputs Mechanical Classification Conducted Radio Frequency Interference IEC 60255-22-6 Type Unrestricted Siemens Protection Devices Limited 8

Radiated Radio Frequency IEC 60255-25 Unrestricted Siemens Protection Devices Limited 9

Number of Elements Setting Range Vs Hysteresis Setting Vs Operate Level Reset Level: Undervoltage Overvoltage Delay Setting td Basic Operate Time : 0 to 1.1xVs 0 to 2.0xVs 1.1 to 0.5xVs Operate time following delay. Inhibited by 46 Negative Phase Sequence Overcurrent Unrestricted Siemens Protection Devices Limi

Elements Number of Elements Phase (OC), Derived Earth (N) and Measured Earth (G) 2 x OC Setting Range Is Time Multiplier Time Delay Operate Level Minimum Operate time IEC Follower Delay Reset Inhibited by 2 x Derived EF (N) 4 x Measured EF (G) IEC: NI ,VI ,EI ,LTI ANSI: MI,VI,EI DTL 0.05, 0.1 ...2.5 x In (OC, N) 64H Restricted Earth Fault Unrestricted Siemens Protection Devices Lim

Case Dimensions Optional ethernet comms module Case Earth connection 2 See note Diameter 3.6 - 4 holes (see note 1) Case Earth connection Diameter 3.6 - 8 holes (see note 1) Case Earth connection Optional ethernet comms module NOTES: Typical when fitted SIDE VIEW Case Earth connection 25mm MIN CLEARANCE FOR TERMINAL WIRING 70mm MIN CLEARANCE FOR F/O COMMS CABLE 75mm MIN CLEARANCE BELOW EN100 MODULE FOR ETHERNET COMMS CONNECTIONS 1) THE 3.6 HOLES ARE FOR M4 THREAD FORMING (TRILOBULAR) SCREWS. THESE ARE SUPPLIED AS STANDARD AND ARE SUITABLE FOR USE IN FERROUS / ALUMINIUM PANELS 1.6mm THICK...

7SR24 Connection Diagram Rear View: Arrangement of terminals and modules 1 NOTES BI = Binary Input BO = Binary Output Shows contacts internal to relay case assembly. Contacts close when the relay chassis is withdrawn from case Data Comms (Optional) Unrestricted Siemens Protection Devices Limited

7SR24 Function diagram / example of external connections 7SR242n-2aAn1-0CA0 W1-Ia Each function element can be assigned to W1 or W2 CT inputs. NOTE: The use of some functions are mutually exclusive 87HS Fig. 7: Standard and Optional Functionality of 7SR24 Relay Unrestricted Siemens Protection Devices Limited

Product description Duobias Multifunctional 2 winding transformer differential protection 7 S R 2 4 2 □ - 2 □ A □ □ - 0 □ A0 ▲ ▲ ▲ ▲ ▲ ▲▲ ▲ ▲ Protection Product Transformer 4 Relay Type Differential (2 winding) 2 Case I/O and Fascia E8 case, 6 CT, 2 EF/REF CT, 1 VT, 9 Binary Inputs / 6 Binary Outputs, 2 E10 case, 6 CT, 2 EF/REF CT, 1 VT, 19 Binary Inputs / 14 Binary Outputs, 3 E12 case, 6 CT, 2 EF/REF CT, 1 VT, 39 Binary Inputs / 14 Binary Outputs, 4 Measuring Input 1/5 A, 40/160V, 50/60Hz Auxiliary voltage 24-250V DC / 100-230V AC. Binary input threshold 19V DC 24-250V DC / 100-230V AC....

Product description Variants Duobias (continued from previous Option C: page) - 24 7 S Standard version - plus Overfluxing Under/overvoltage Neutral voltage displacement Under/overfrequency Undercurrent Open circuit Negative phase sequence overcurrent Thermal overload Instantaneous phase fault overcurrent Instantaneous earth fault Time delayed phase fault overcurrent Time delayed earth fault Additional Functionality No Additional Functionality A 1) For ESI48-4 compliance of binary inputs external resistors are required - see Technical Manual. Unrestricted Siemens Protection Devices Limited 16