Siemens Reyrolle 7SR191 Capa Capacitor Bank Protection Relay
Siemens Reyrolle 7SR191 Capa Capacitor Bank Protection Relay Suppliers,Exporters in India
ARP IMPEX is a supplier and exporter of Siemens Reyrolle 7SR191 Capa Capacitor Bank Protection Relays in India. We handle requirements for medium-voltage capacitor banks, power-factor correction systems, utility substations, industrial switchgear panels and replacement of existing capacitor protection relays.
The Siemens Reyrolle 7SR191 is a numerical relay developed specifically for shunt-connected distribution capacitor banks. It can be used with common capacitor-bank arrangements such as single star, double star, delta and H-bridge configurations.
A capacitor bank may continue operating even after an individual capacitor element starts to fail. This can increase electrical stress on the remaining elements and may lead to further damage. The 7SR191 monitors unbalance, overcurrent, earth fault and other abnormal operating conditions so that an alarm or trip can be initiated before the fault becomes more serious.
The relay is available in different current and voltage-input configurations. Models without voltage inputs are suitable for current-based capacitor protection, while versions with three VT inputs can also provide voltage, frequency and directional protection functions.
The 7SR191 also supports re-energisation blocking. After a capacitor bank is disconnected, the relay can prevent the circuit breaker from closing again until the bank has had enough time to discharge. This helps avoid switching a partly charged capacitor bank back onto the network.
Buyers searching for a Siemens Reyrolle 7SR191 supplier in India, a capacitor bank unbalance protection relay, or a 7SR191 relay with IEC 61850 communication can share the complete Siemens article number for price and availability.
Available Reyrolle 7SR191 Models
The main hardware versions include:
- 7SR1912: Four current inputs with three binary inputs and five binary outputs
- 7SR1913: Four current inputs with six binary inputs and eight binary outputs
- 7SR1915: Four current inputs, three voltage inputs, three binary inputs and five binary outputs
- 7SR1916: Four current inputs, three voltage inputs, six binary inputs and eight binary outputs
The correct version depends on the capacitor-bank connection, required protection functions, binary I/O and communication system.
Technical Specifications
- Brand: Siemens
- Product family: Reyrolle Capa
- Series: 7SR191
- Product type: Numerical capacitor bank protection relay
- Main application: Protection of shunt-connected distribution capacitor banks
- Bank arrangements: Single star, double star, delta and H-bridge
- Current inputs: Four
- Voltage inputs: Three on applicable models
- CT secondary rating: 1 A or 5 A
- Voltage input: 40–160 V AC on applicable models
- Rated frequency: 50/60 Hz
- Binary inputs and outputs depend on the selected model
- Auxiliary supply: AC or DC, depending on the ordering code
- Display: Front LCD
- Indication: Programmable LEDs
- Local communication: Front USB
- Remote communication: RS485
- Ethernet communication: Available on selected versions
- IEC 61850: Available on applicable Ethernet models
- Configuration software: Siemens Reydisp
- Recording: Fault, event and waveform records
- Construction: Withdrawable relay element
The exact input arrangement, auxiliary voltage, communication interface and case size depend on the complete Siemens ordering code.
Main Protection Functions
Depending on the selected configuration, the Siemens Reyrolle 7SR191 can provide:
- Capacitor-bank current-unbalance protection
- Phase overcurrent protection
- Earth-fault protection
- Thermal overload protection
- Undercurrent and loss-of-supply detection
- Capacitor overvoltage protection
- Negative-phase-sequence protection
- Restricted earth-fault protection
- Circuit-breaker failure protection
- Trip- and close-circuit supervision
- CT supervision
- Re-energisation blocking
Versions with voltage inputs can also provide:
- Undervoltage and overvoltage protection
- Directional overcurrent and earth-fault protection
- Voltage-unbalance protection
- VT supervision
- Underfrequency and overfrequency protection
The available functions must be confirmed against the full Siemens part number.
Features
- Developed specifically for capacitor bank protection
- Suitable for common shunt capacitor-bank arrangements
- Detects capacitor-element failure through sensitive unbalance protection
- Provides alarm and trip stages for developing capacitor faults
- Overcurrent and earth-fault protection cover short-circuit conditions
- Thermal protection monitors prolonged capacitor-bank overloading
- Undercurrent protection can detect bank disconnection or loss of supply
Re-energisation blocking allows the capacitor bank time to discharge - Voltage protection is available on models fitted with VT inputs
- Programmable logic supports breaker control and panel interlocking
- Front display shows current, voltage, alarms and trip information
- Fault and waveform records assist with fault investigation
- USB and RS485 support commissioning and remote monitoring
- IEC 61850 versions support substation automation projects
- Different binary I/O arrangements suit new and retrofit panels
Suitable for replacement of older capacitor-bank protection relays
Applications
Siemens Reyrolle 7SR191 Capacitor Bank Protection Relays are commonly used for:
- Medium-voltage shunt capacitor banks
- Power-factor correction capacitor banks
- Single-star capacitor banks
- Double-star capacitor banks
- Delta-connected capacitor banks
- H-bridge capacitor bank arrangements
- Utility distribution substations
- Industrial substations
- Power-generation plants
- Captive power systems
- Steel and cement plants
- Mining and mineral-processing facilities
- Oil and gas installations
- Refineries and petrochemical plants
- Renewable-energy substations
- Capacitor control and protection panels
- Power-quality improvement systems
- Existing capacitor relay replacement projects
The range is suitable for buyer searches such as capacitor bank unbalance protection relay for MV substations, Siemens 7SR191 relay for double-star capacitor banks, Reyrolle capacitor bank relay with IEC 61850, and capacitor protection relay supplier and exporter in India.
Selecting the Correct Siemens 7SR191 Relay
The description “Reyrolle 7SR191” does not identify the complete relay configuration. Models differ by voltage inputs, binary contacts, auxiliary supply and communication arrangement.
For an accurate quotation, share:
- Complete Siemens article number
- Required quantity
- Destination country
- Required communication interface, where applicable
For replacement enquiries, also share a clear photograph of the existing relay nameplate and rear terminals.
If the Siemens part number is unavailable, share the existing relay details and the capacitor-bank configuration being protected.
Siemens Reyrolle 7SR191 Supplier and Exporter in India
ARP IMPEX supplies Siemens Reyrolle 7SR191 Capacitor Bank Protection Relays for switchgear manufacturers, EPC contractors, panel builders, utilities and industrial maintenance companies.
We handle enquiries for:
- Siemens Reyrolle 7SR191 Capa Relays
- Capacitor bank unbalance protection relays
- Relays for single-star and double-star capacitor banks
- Protection relays for delta and H-bridge capacitor banks
- Capacitor relays with voltage inputs
- Reyrolle relays with RS485 communication
- Capacitor protection relays with IEC 61850
- Replacement Siemens capacitor-bank relays
- Capacitor protection-panel retrofit requirements
- Utility and industrial substation projects
The Siemens Reyrolle 7SR191 price depends on the complete article number, voltage inputs, binary I/O, auxiliary supply, communication interface and ordered quantity.
Send the complete Siemens part number, required quantity and destination country for price, availability and export quotation.
