Section 2: Equipment Operating Conditions; Current Transformer Circuits; External Resistors; Fibre Optic Communication - Siemens 7SR242 Duobias Technical Manual

Section 2: Equipment Operating Conditions

General Safety Precautions

Current Transformer Circuits

!
The secondary circuit of a live CT must not be open circuited. Non-observance of this precaution can result in
injury to personnel or damage to equipment.
!

External Resistors

Where external resistors are fitted to relays, these may present a danger of electric shock or burns, if touched.
!

Fibre Optic Communication

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.

Front Cover

!
The front cover provides additional securing of the relay element within the case. The relay cover should be in
place during normal operating conditions.

Disposal

!
The Relay should be disposed of in a manner which does not provide a threat to health or the environment. All
laws and regulations specific to the country of disposal should be adhered to.
The relays and protection systems manufactured under the Reyrolle brand currently do not come within the scope
of either the European WEEE or RoHS directives as they are equipment making up a fixed installation.
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Chapter 5) 7SR242 Duobias Installation Guide
Chapter 5 Page 7 of 24