Siemens 7SR18 Solkor - Section 2: Equipment Operating Conditions; Current Transformer Circuits; External Resistors; Fibre Optic Communication

7SR18 Installation Guide
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Section 2: Equipment Operating Conditions
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 connected to the relay circuitry, these may present a danger of
electric shock or burns, if touched.
2.3 Fibre Optic Communication
Where fibre optic communication ports are fitted, the lasers are Class 1 devices but
recommend they 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.
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