Siemens SIPROTEC 7SJ62 Instruction Manual page 20

Multi-functional protective relay with bay controller

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Table of Contents

Introduction

Power Supply

A separate Service Port can be provided for remote communications via a modem,

or substation computer. The SIPROTEC

All 7SJ62 data can be transferred to a central control and monitor system (RTU/SCA-

DA) through the Scada Port. Various protocols and physical interfaces are available

to suit the particular application.

The 7SJ62 can be supplied with any of the common power supply voltages from 24

VDC to 250 VDC. The device can also be supplied with 115 VAC or 230 VAC. Momen-

tary dips of the supply voltage up to 50 ms are bridged by a capacitor (see Technical

Data, Sub-section 10.1). Voltage dips can occur, for example, if the voltage supply

system (substation battery) becomes short-circuited or experiences a severe variation

4 operating program DIGSI

4 is required.

7SJ62 Manual

C53000-G1140-C121-1