Siemens SG8158-00 manual Product Description, Standard Configuration

1

Introduction

Signal Words

The signal words Danger, Warning, and Caution used in this manual indicate the degree of hazard that the user or operator can encounter. These words are defined as follows:

•Danger - indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury

•Warning - indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury

•Caution - indicates a potentially hazardous situation which, if not avoided, could result in moderate or minor injury

Required Procedures

In addition to normal safety practices, user personnel must adhere to the following procedures:

1.Always work on de-energized equipment. Always de- energize a breaker or contactor, and remove it from the equipment before performing any tests, maintenance, or repair.

2.Always perform maintenance on equipment employing springs after the spring-charged mechanisms are dis- charged.

3.Always let an interlock device or safety mechanism per- form its function without forcing or defeating the device.

Field Service Operation

Siemens can provide competent, well-trained Field Service Representatives to provide technical guidance and advisory assistance for the installation, overhaul, repair, and mainte- nance of Siemens equipment, processes, and systems. Contact regional service centers, sales offices, or the factory for details.

1.3 Product Description

The ISGS relay is a general purpose, multifunction, micropro- cessor-based protective relay. It performs protection, meter- ing, and monitoring for three phase current transformer (CT) inputs and one ground CT input.

The ISGS relay provides two breaker tripping contacts and one relay disabled (alarm) contact. The relay disabled contact is a normally closed contact which opens when the relay is functioning properly.

1.3.1Standard Configuration

The ISGS relay base unit includes the following standard pro- tection, metering, and monitoring features:

•Instantaneous Phase Overcurrent (50) protection

•Instantaneous Neutral or Ground Overcurrent (50N) protection

•Phase Time Overcurrent (51) protection

•Neutral or Ground Time Overcurrent (51N) protection

						ISGS
						System
						Pickup
						Trip
	Pass		Direct	7	8	9
	word		Addr
Target	Target		Trip	4	5	6
Reset	Reset		Log
				1	2	3
					0	-/+
			F	Pass	∞ Enter
				word
				Yes	No
					Data Port
		ISGS	LR
	Cat# C552-100V-5D0-000
	VPSn 120VAC/250VDC
	IPH	5A	IC 5A
	Ser#	Beta05HW15W2.XX

Figure 1.1 Intelligent SwitchGear System (ISGS) Relay

•Nine selectable time overcurrent curves and one custom curve

•Breaker Failure (50BF) protection

•Phase and neutral current as well as average current metering

•Minimum/maximum logs for storing metering data

•Waveform capture

•Trip log for recording information on last eight trip events

•Event log for monitoring and recording relay functions for status changes

•2-line by 16-character liquid crystal display (LCD) for viewing measured data

•26-key membrane keypad for local access and selected manual data entry.

•LED indicators for general relay status information

•Standard RS-232 communications port for local access to all parameter settings using a personal computer (PC) and Wisdom™ software

•Password security

The ISGS relay is supplied in an M1-size drawout case with dust tight front cover. The case is compatible with XLA con- necting plugs that are commonly used to test relays.

2 Siemens Energy & Automation, Inc.