CAUTION
External Resistors
²
Where external resistors are fitted to relays, these may present a danger of electric shock or burns, if
touched.
CAUTION
Fibre Optic Communication
²
Where fibre optic communication devices are fitted, these should not be viewed directly. Optical
power meters should be used to determine the operation or signal level of the device.
CAUTION
Front Fascia
²
For safety reasons the following symbols are displayed on the device.
²
Dielectric Test Voltage 2 kV
²
Impulse Test Above 5 kV
²
Caution: Refer to Equipment Documentation
²
Caution: Risk of Electric Shock
Modular Concept
The 7SR5 platform is common to a number of devices and so ensures the consistency and integrity of all func-
tionalities across the device series:
•
Modular system design in hardware, software, and communication
•
Functional integration of various applications, such as protection, control, and fault recorder
•
Consistent functionality across the entire family of devices
•
Upgrade path using software libraries and updates
•
Flexible hardware architecture
•
Self-monitoring routines for device faults
General Properties
•
Fully digital measured-value processing and control, from sampling and digitizing of measurands to
closing and tripping decisions for the circuit‑breaker.
•
Complete galvanic and interference-free isolation of the internal processing circuits from the system
measuring, control, and supply circuits through instrument transformers, binary inputs, binary outputs
and DC/AC voltage converters.
Introduction
20 Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019
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