Siemens Reyrolle Numerical Relay

The 7SR191 Capa is a numerical protection device with a highly comprehensive functional software package.

The market for power capacitors is continually growing due to the expanding power network driven by increased customer demand. Power capacitors improve the performance, quality and efficiency of the system and minimize power loss. The 7SR191 Capa protection relay is designed with all of the necessary functionality for use on shunt connected distribution capacitor banks arranged in all of the common connection configurations:

• Single Star
• Double Star
• Delta
• H Configuration

The 7SR191 Capa is a numerical protection device with a highly comprehensive functional software package which includes a range of integral application functions aimed at reducing installation, commissioning, wiring and engineering time.

Features:

• User selectable hardware configuration to suit different bank arrangements
• 3 pole overcurrent + 1 pole unbalance
• 1 pole overcurrent + 3 pole unbalance
• Optional voltage inputs
• Re-energisation blocking to prevent CB closing until bank has self discharged
• Overvoltage protection by integration analysis of current
• Suitable for use with both internally/externally fused and fuseless capacitors
• User programmable characteristics for all inverse voltage, current and thermal curves
• Unbalance protection with natural spill compensation

Our differential protection relay, Reyrolle7SR18, is a numeric three phase differential protection relay used to detect in zone phase and earth faults. This differential protection relay is applied to overhead line and underground cable circuits as well as shorter circuits such as interconnectors.

Reyrolle 7SR18 differential protection relays have integral back-up overcurrent/earth fault protection and intertripping channels.

Protection Relays (and associated CTs) are installed at each end of the protected circuit. The relays are connected together with a fully supervised fibre optic protection communications link.

Relays have four current inputs and are housed in E6 cases. Integrated logic is provided to allow the optimal configuration of relay protection functionality with the relay''s analogue inputs and binary input/output circuits.

Protection and instrumentation functionality is accessible via the data comms channel - a front USB, RS485 and IEC 61850 (optional) rear ports.

Protection Functions:

• 3-phase, phase segregated current differential protection
• Overcurrent
• Earth Fault

Supervision Functions:

• Protection comms link supervision
• Circuit Breaker Fail
• CT Supervision
• Trip Circuit Supervision

Control Functions:

• Intertripping

Monitoring functions:

• Primary/Secondary Current Phases and Earth
• Historical Demand Record

Features:

• CT ratio correction
• Four Setting Groups
• Password Protection
• Self Monitoring
• Circuit Breaker Trip Counter
• Fault, event and waveform records

7SR220 series relays include for directional control of the overcurrent and earth fault functionality and are typically installed where fault current can flow in either direction i.e. on interconnected systems. Relays have five current and four voltage inputs they are housed in E6 or E8 cases.

Integrated logic is provided to allow the optimal configuration of relay functionality with the relays analogue inputs and binary input/output circuits. The optional auto-reclose feature offers an integrated solution for use on OHL feeders.

The relay functionality allows highly flexible settings for current and time grading making it compatible with all types of overcurrent protections.

Protection, instrumentation and metering functionality is accessible via data comms channel(s). A front USB port for local PC connection and rear electrical RS485 port for remote connection are provided as standard, additional ports are available as options.

The 7SR23 DAD is a numeric high impedance circulating current relay has four current inputs, it is used as a unit protection to detect phase and earth faults.

The relay can be applied to bus bars, connections, transformers, reactors and motors.

The relay is used in ‘high impedance’ applications in conjunction with external stabilising resistors and non-linear resistors (Metrosils). Standardised external components can be provided in an Epsilon case to facilitate design and installation.

The integral CT supervision feature detects open circuits in the CT secondary wiring circuits, a consideration where CT circuits are switched.

Relays are housed in E6 or E8 cases. Integrated logic is provided to allow the optimal configuration of relay input and output functionality. Protection, instrumentation and metering functionality is accessible via data comms channels. A front fascia USB port for local connection and RS 485 rear port for remote connection are provided as standard, additional rear ports are available as options..

The Reyrolle 7SR157 Argus is a combined check and system synchronising relay designed to carry out controlled closing of a circuit breaker using measurements of the line and bus voltages. The relay will prevent closure of the circuit breaker if the differences in phase angle, slip frequency or magnitude of the voltages fall outside prescribed Limits.

If the parameters are within limits, the relay will issue an output which can be used to close the circuit breaker directly or in conjunction with an auto-reclose scheme.

Housed in a 4U high, size E4 case, the relay provides instrumentation and fault data with integrated input and output logic, data logging and fault reports. Communication access to the relay functionality is via a front USB port for local PC connection or rear electrical RS 485 port for remote Connection.

FunctionsProtection Functions:

• Instantaneous Overcurrent Protection (50)
• Instantaneous Derived Earth Fault (50N)
• Instantaneous Measured Earth Fault (50G)
• Time Delayed Overcurrent (51)
• Time Delayed Derived Earth Fault (51N)
• Time Delayed Measured Earth Fault (51G)
• Line Check / Switch On To Fault (SOTF)
• Inrush Restraint

• Self Powered
• 10 Fault Records
• 100 Event Records
• Password Protection
• Self Monitoring
• Overcurrent Protection Functions (Instantaneous and Delayed)
• Relay Integration via Reydisp Evolution PC Software
• Sensitivity of 20% Nominal Current

• 4 Current Transformer with 1A or 5A Inputs
• 2 Binary Inputs
• 2 Latched Binary Outputs, 1 changeover and 1 normally open
• 1 Pulsed Output

• 16 Character x 2 Line Backlit LCD
• Menu Navigation Keys
• 9 Predetermined LED’s for Easy Use
• Front USB Interface

The Reyrolle 7SR10 Argus overcurrent and earth fault relay is a numerical overcurrent protection relay intended as a low-cost solution for distribution and industrial applications.The Reyrolle 7SR10 Argus overcurrent and earth fault relay is developed using the latest generation of hardware technology and is available in multiple variants depending on the power supply, Binary input/binary output configuration and data communication facility.Housed in a 4U high, size 4 non-draw-out case and these relays provide protection, monitoring, instrumentation, and metering with integrated input and output logic, data logging, and fault reports. Communication access to the relay functionality is via a front USB port for local PC connection or rear electrical RS485 (optional) port for remote connection.

• It has Universal power supply suitable for both AC and DC. 
• 1A and 5A CT selectable at site. Basic communication protocol like MODBUS RTU and IEC 103 available and they are also site selectable. Relay are equipped with sufficient number of DI/DO i.e. upto 6 DI and 6 DO. 
• 7SR1003 is designed for current based protection and 7SR1004 is available with additional voltage inputs to take care of voltage based protections. 7SR1005 is designed for motor protection application.

The Reyrolle 7SR17 Rho is a numeric protection relay with four current inputs and optionally three voltage inputs.The relay is applied to motors and their connections providing an integrated protection system.The relay is typically used as a stand-alone device but can be supplied with an external unit to interface with remote temperature detectors embedded in the motor or installed on auxiliary equipment.The Reyrolle 7SR17 Rho relay includes thermal protection optimized for motor applications and motor starting supervision algorithms. Several other protections are also provided and are selectable as required so that a solution appropriate to the installation can be achieved.The Reyrolle 7SR17 with its draw out enclosure, enhanced BI/Os, higher RTD inputs, multiple communication interfaces including IEC 61850 provides both current and voltage based motor protection algorithms for industrial motor feeder applications.Siemens Reyrolle motor protection portfolio provides optimal protection platforms for panel builders serving industrial and distribution applications. The Reyrolle 7SR17 Rho is housed in an E4 case.Full user configurability and integrate logic allows the optimal configuration of relay input and output functionality.

A range of 14 way and 28 way test blocks, the 14 way are housed in an Epsilon size E2 case, 28 way blocks are housed in an E4 case.

Features

• A range of 14 way and 28 way test blocks, the 14 way are housed in an Epsilon size E2 case, 28 way blocks are housed in an E4 case.
• CT shorting is included in each model.
• Shorting takes place in the test block, not the test plug.
• Uses a three stage isolation process.
• Test plugs are fitted with 4mm shrouded test points.

Arc fault protection is a relatively new technique employed for the fast clearance of arcing faults on Busbars & within metal clad switchgear & associated cable boxes. The arc is detected using an optical sensor & the signal input to a protection device which also monitors the load current on the system. Conventional current based protection techniques are at times challenged by the nature of arcing faults, and can result in slow protection clearance times. Slow protection clearance times increase the risk to nearby personnel and increase the degree of damage to plant and equipment. By employing an optical detection technique, Arc Fault Protection results in fast clearance of arcing faults.

When an arc fault start current is coincident with a signal from the optical sensor a trip command is output. An Arc trip only signal can be achieved within 10ms which can be considerably faster than that provided by a traditional IDMT overcurrent relay. This is because the onset of an arcing fault can occur at relatively low fault currents. Arguably the greatest risk of arc fault damage exists at the CB cable termination & in the CB chamber itself due to the slow clearance times of the IDMT feeder protection.

The ReyArc range of protection devices provide multiple arc fault protection schemes depending on your protection system requirements:

ReyArc Arc Protection range:

• 7XG3120 Arc Fault Monitor Detects Arc faults independently & in parallel with an overcurrent check relay.
• 7XG3123 ARC Fault Module - Designed to connect one or two optical arc fault sensors to a protection relay status input.
• 7XG3124 IEC61850 Arc Fault Monitor – Arc Fault detection using IEC-61850
• 7XG3126 Arc Fault Monitor with Integrated Three Phase Current Check
• 7XG3130 Optical ARC Fault Senso

7SG17 relays provide thermal overload protection of motors or static plant for all in service conditions.

Features such as overcurrent and earth fault provide back-up protection for the motor and connections.

Relays have four current inputs and are housed in E6 or E8 cases. Integrated logic is provided to allow the optimal configuration of relay functionality with the relays analogue/RTD inputs and binary input/output circuits.

Protection and instrumentation functionality is accessible via the data comms channel - a fibre optic or RS485 port is provided on the rear of the relay.