Section 2: Equipment Operating Conditions; Current Transformer Circuits; External Resistors; Fibre Optic Communication - Siemens Argus 7SR21 Technical Manual

7SR21 & 7SR22 - Installation Guide
Section 2: Equipment Operating
2.1

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.
!
2.2

External Resistors

!
Where external resistors are fitted to relays, these may present a danger of electric shock or burns, if touched.
!
2.3

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.
2.4

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.
2.5

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.
2.5.1

Environmental Protection Hints

Disposal of Old Equipment and Batteries (Applicable only for European Union and Countries with a
Recycling System)
The disposal of our products and possible recycling of their components after decommissioning has to be carried
out by an accredited recycling company, or the products/components must be taken to applicable collection
points. Such disposal activities must comply with all local laws, guidelines and environmental specifications of the
country in which the disposal is done. For the European Union the sustainable disposal of electronic scrap is
defined in the respective regulation for "waste electrical and electronic equipment" (WEEE).
Unrestricted Page 6 of 36
Conditions
The crossed-out wheelie bin on the products, packaging and/or accompanying
documents means that used electrical and electronic products and batteries must not be
mixed with normal household waste.
According to national legislation, penalties may be charged for incorrect disposal
of such waste.
©2018 Siemens Protection Devices Limited