Siemens Reyrolle 7SR17 Rho Motor Protection Relay
Siemens Reyrolle 7SR17 Rho Motor Protection Relay Suppliers,Exporters in India
ARP IMPEX is a supplier and exporter of Siemens Reyrolle 7SR17 Rho Motor Protection Relays in India. We handle requirements for medium-voltage motors, industrial motor control panels, switchgear projects, plant maintenance and replacement of existing protection relays.
The Reyrolle 7SR17 is a numerical relay used for the protection and control of induction motors. It monitors the motor during starting and normal operation and trips when it detects conditions that could damage the motor or interrupt the process.
The relay can protect against thermal overload, excessive starting time, locked rotor, repeated starting, phase unbalance, earth fault, short circuit and loss of load. These functions make the 7SR17 suitable for important motors operating pumps, compressors, fans, conveyors, crushers and other industrial equipment.
A basic overload relay may be sufficient for a small or non-critical motor. Larger motors generally need closer monitoring because a motor failure can stop an entire plant section. The 7SR17 combines motor protection, start and stop control, measurements, fault records and communication in one relay.
Different models are available with varying voltage inputs, binary contacts, temperature-monitoring options and communication interfaces. Buyers should share the complete Siemens article number because two 7SR17 relays may have different hardware even when the front appearance is similar.
For a Siemens Reyrolle 7SR17 price, replacement offer or export quotation, send the relay part number, motor rating, CT details and required quantity.
Technical Specifications
- Brand: Siemens
- Product family: Reyrolle Rho
- Series: 7SR17
- Product type: Numerical motor protection relay
- Main use: Protection and control of induction motors
- Current inputs: Three-phase current inputs and one earth-fault input
- CT secondary rating: 1 A or 5 A
- Voltage inputs: Available on selected models
- Rated frequency: 50/60 Hz
- Temperature monitoring: Available on applicable configurations
- Auxiliary supply: AC or DC, depending on the ordering code
- Setting groups: Up to four
- Display: Front backlit LCD
- Indication: Programmable LEDs
- Local communication: Front USB
- Remote communication: RS485 on applicable versions
- Communication protocols: IEC 60870-5-103, Modbus RTU and DNP3.0, depending on the model
- IEC 61850: Available on selected Ethernet versions
- Configuration software: Siemens Reydisp Evolution
- Recording: Fault, event and waveform records
- Control: Motor start and stop control through relay logic
The exact inputs, auxiliary supply, communication ports and temperature-monitoring options depend on the complete Siemens ordering code.
Main Protection Functions
Depending on the selected model, the Siemens Reyrolle 7SR17 can provide:
- Thermal overload protection
- Motor stall and locked-rotor protection
- Excessive starting-time protection
- Starts-per-hour supervision
- Minimum time between starts
- Phase-current unbalance protection
- Phase-reversal protection
- Phase overcurrent protection
- Earth-fault protection
- Undercurrent and loss-of-load protection
- Anti-backspin protection
- Temperature monitoring on applicable versions
- Trip-circuit supervision
- Motor start and stop control
Models with voltage inputs can also support additional voltage, frequency, power and power-factor functions.
Features
- Protects the motor during starting and normal operation
- Thermal model monitors motor heating caused by load and repeated starts
- Detects motor stall and locked-rotor conditions
- Supervises excessive start time
- Limits are repeated, starting when the motor needs cooling time
- Phase-unbalance protection helps reduce overheating caused by unequal currents
- Undercurrent protection can identify dry running or loss of mechanical load
- Phase-reversal protection helps prevent operation in the wrong direction
- Anti-backspin logic can block restarting before the motor has fully stopped
- Temperature monitoring is available for motor windings and bearings
- Multiple setting groups suit different motor operating conditions
- Front display shows measurements, thermal status, alarms and trip information
- Programmable LEDs provide a clear local fault indication
- Fault and waveform records help maintenance teams investigate motor trips
- USB and RS485 support commissioning and remote monitoring
- IEC 61850 versions are available for applicable substation projects
- Suitable for new panels, retrofit work and relay replacement requirements
Applications
- Siemens Reyrolle 7SR17 Motor Protection Relays are commonly used for:
- Medium-voltage induction motors
- Large low-voltage motors
- Water and process pumps
- Boiler feed pumps
- Cooling-water pumps
- Compressors
- Industrial fans and blowers
- Conveyors
- Crushers and grinding mills
- Mixers and agitators
- Material-handling systems
- Motor control centres
- Industrial switchgear panels
- Oil and gas facilities
- Refineries and petrochemical plants
- Steel plants
- Cement plants
- Mining and mineral-processing units
- Power-generation plants
- Water and wastewater treatment facilities
- Marine and port installations
- Motor relay replacement projects
The range is suitable for buyers searching for a Siemens motor protection relay for pumps and compressors, a numerical protection relay for medium-voltage induction motors, or a motor protection relay with RTD and IEC 61850 communication.
Selecting the Correct Siemens 7SR17 Relay
The correct 7SR17 model depends on the motor data and the required relay hardware.
For an accurate quotation, share:
- Complete Siemens MLFB or article number
- Motor rated power
- Motor voltage and full-load current
- CT ratio and CT secondary rating
- Motor starting method
- Temperature sensor or RTD requirement
- Auxiliary supply voltage
- RS485 or IEC 61850 communication requirement
- Required quantity
- Destination country
For replacement enquiries, share clear photographs of the existing relay nameplate and rear terminals. The existing setting file, motor datasheet and panel wiring diagram can also help confirm the closest replacement.
Siemens Reyrolle 7SR17 Supplier and Exporter in India
ARP IMPEX supplies Siemens Reyrolle 7SR17 Rho Motor Protection Relays for switchgear manufacturers, EPC contractors, panel builders, utilities and industrial maintenance companies.
We handle enquiries for:
- Siemens Reyrolle 7SR17 motor protection relays
- Numerical relays for induction motors
- Thermal overload protection relays for large motors
- Motor protection relays with temperature monitoring
- 7SR17 relays with RS485 communication
- Siemens motor relays with IEC 61850
- Protection relays for pumps and compressors
- Medium-voltage motor protection projects
- Replacement Reyrolle Rho relays
- Motor control-panel retrofit requirements
The Siemens Reyrolle 7SR17 price depends on the complete article number, current and voltage inputs, temperature-monitoring option, auxiliary supply and communication interface.
Send the Siemens part number, motor details, quantity and destination country for price, availability and export quotation.
