Section 1: Introduction; General Safety Precautions; Current Transformer Circuits; External Resistors - Siemens Solkor 7PG2113 Technical Manual

Section 1: Introduction

This manual is applicable to the following relays:
•
7PG2113/5 Pilot Wire Differential Relay with Overcurrent and Earth Fault Relay
•
7PG2114/6 Pilot Wire Differential Relay with Directional Overcurrent and Directional Earth Fault Relay
The 'Ordering Option' Tables summarise the features available in each model
1.1

General Safety Precautions

1.1.1
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.
1.1.2
Where external resistors are connected to the relay circuitry, these may present a danger of electric
!
shock or burns, if touched.
1.1.3
The front cover provides additional securing of the relay element within the case. The relay cover
!
should be in place during normal operating conditions.
©2010 Siemens Protection Devices Limited

Current Transformer Circuits

External Resistors

Front Cover

7PG2113/4/5/6 Solkor Description of Operation
Chapter 1 Page 6 of 80