Siemens ISGS SG8158-00 - Manual (Page 8)

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