Siemens SIPROTEC 7SK81 Motor Protection Relay.
The SIPROTEC 7SK81 Motor Protection Relay is a compact and reliable solution designed for small and medium-sized motors in industrial and commercial installations across Mumbai. Featuring 4 current inputs (4xI) and optional 3 voltage inputs (3xV), this low-power CT relay ensures precise monitoring and protection of motors and generators.
Compliant with IEC61869 standards, the SIPROTEC 7SK81 provides efficient motor and generator protection in a space-saving SIPROTEC 4 Compact design. Ideal for industrial applications, it safeguards equipment from overcurrent, short circuits, and other electrical faults, ensuring maximum uptime and operational safety.
Available from trusted suppliers in Mumbai, the SIPROTEC 7SK81 combines technical excellence with reliable performance, making it the go-to choice for motor protection in small to medium-scale industrial setups.
Key Features of Siemens SIPROTEC 7SK81 Motor Protection Relay
- Compact SIPROTEC 4 design for space-constrained installations
- 4xI 0/3xV configuration for low-power CT and VT connections
- IEC61869 compliant for accurate and standardized protection
- Suitable for small and medium motors and generators
- Ideal for industrial and commercial applications in Mumbai
Hardware
- 4 current inputs
- 0/3 voltage inputs
- 3/7 binary inputs (thresholds configurable using software)
- 5/8 binary outputs (2 changeover)
- 0/5 RTD inputs
- 1 life contact
- Pluggable voltage terminals
- Inputs for low power VTs and CTs according IEC 61869-6 (formerly IEC 60044-7 and IEC 60044-8)
- Removeable terminal blocks
- Binary input thresholds settable using DIGSI (3 stages)
- 9 programmable function keys
- 6-line display
- Buffer battery is exchangeable from the front
- USB front port
- 2 additional communication ports
- Integrated switch for low-cost and redundant optical Ethernet rings
- Ethernet redundancy protocol RSTP for highest availability
- Relay-to-relay communication through Ethernet with IEC 61850 GOOSE
- Millisecond-accurate time synchronization through Ethernet with SNTP






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