Siemens 7SR11021HA121CA0/CC Protection Relay

Core Performance & Industrial Application

The Siemens 7SR11021HA121CA0/CC is a Reyrolle Argus 7SR11 series non-directional overcurrent and earth fault protection relay.

It provides time delayed and instantaneous overcurrent, earth fault protection for MV feeders and motors.

It supports configurable protection curves, fault recording, event logging and metering functions.

It is equipped with front USB port and rear RS485 communication for parameter setting and data upload.

It has built-in LCD display and multi-color LED indicators for local status check and fault inquiry.

It is widely used for medium voltage switchgear protection cabinet maintenance and spare replacement.

Technical Specifications

▶ Product type: Overcurrent and earth fault protection relay

▶ Brand: Siemens Reyrolle

▶ Model: 7SR11021HA121CA0/CC

▶ Series: Argus 7SR11

▶ Protection function: Overcurrent, earth fault, thermal overload

▶ Communication: USB, RS485

▶ Mounting: Panel flush mounting

▶ Operating temperature: -20℃ ~ +60℃

▶ Protection rating: IP54 (front panel), IP20 rear

▶ Feature: Fault waveform recording, event log, configurable protection curve

▶ Country of origin: UK

▶ Compliance: CE certification

Industry Applications

Applied in power distribution substations, industrial MV switchgear for feeder and motor protection system spare replacement.

Note: Confirm auxiliary supply voltage and CT ratio before ordering