Instructions
for
Type
GFR
Ground
Fault
Protection
Systems
with
Automatic
Test
Panel
TABLE
OF
CONTENTS
Section
Page
1.0
2.0
3.0
4.0
4.1
4.2
4.2.1
4.2.2
4.2.2.1
4.2.2.2
4.3
4.3.l
4.3.1.1
4.3.1.2
4.3.1.3
5.0
5.1
5.2
5.3
5.4
5.5
5.5.1
5.5.2
5.5.3
5.6
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.7
UL Listing
...................
.
General Purpose
...............
.
Description
..................
.
Application Considerations
........
.
General
...................
.
Methods
of
Achieving System
Selectivity
.................
.
Time Current Band Settings
....
.
Zone Selective Interlocking
....
.
Zone Selective Interlock
Wiring
................
.
Zone Interlocking Operation
Mode
................
.
Relay Settings
...............
.
General
.................
.
Single Zone
of
Protection
...
.
Multiple Zones
of
Protection -
Without Zone Interlocking
...
Multiple Zones
of
Protection -
With Zone Interlocking
.....
.
Relay Type Selection
............
.
Available Relay Types
.........
.
Setting Adjustments
...........
.
Ground Fault Signal Memory
.....
.
Time-Current Curves
..........
.
Relay Selection, General.
.......
.
Pick-up Range
.............
.
Type
of
Selectivity
.........
.
Type
of
Operation
..........
.
Relay Electrical Ratings
........
.
Control Power Required
......
.
Test Winding Power Required
..
.
Output Contacts
...........
.
Zone Interlock Contacts
......
.
Maximum Dielectric
.........
.
Mounting Arrangements
........
.
2
2
3
4
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
8
8
8
8
8
8
8
8
8
8
8
8
Effective September, 1985 Supersedes I.L. 15321-B dated August, 1982
Section
5.8
5.8.1
5.8.2
5.8.3
6.0
6.1
6.2
6.2.1
6.2.2
6.2.3
6.2.4
7.0
7.1
7.2
7.3
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
7.5
7.6
8.0
8.1
8.2
9.0
9.1
10.0
10.l
10.2
10.3
l.L.
15321.('
File 29-700
Connection Diagrams
..........
.
Relay Connections. . . . . . . . .
..
Typical System Diagrams . . . . . .
Zone Differential
GFR
Operation Principles. . . . . . . .
..
Ground Fault Current Sensors
......
.
General Description
...........
.
Electrical Ratings
............
.
Maximum System Voltage
.....
.
Withstand
...............
.
Dielectric Withstand
.........
.
Maximum Error Signal
.......
.
Ground Fault Test Panel
..........
.
General Description/Purpose . .
...
.
Available Types
..............
.
Electrical Data
..............
.
Operation Sequence
...........
.
Normal Operating Condition
...
.
If
Ground Fault Occurs
......
.
Action Required
...........
.
Test Without Service
Interruption
..............
.
Test With Service Interruption
..
.
Connection Diagrams . . . . . .
....
.
Alternate Test Diagrams
........
.
Ground Fault Warning Indicator Relay .
General Purpose . . . . . . . . . . . . . .
Available Styles
..............
.
Ground Fault Indicating Ammeter
...
.
General Purpose/Description
.....
.
Performance Testing
............
.
Code Requirements . . . . . . . . . . . .
Standards Requirements
........
.
General Test Instructions
.......
.
Page
10
10
10
10
10
10
11
11
11
11
11
14
14
14
17
17
17
17
17
17
17
17
17
20
20
20
21
21
23
23
23
23
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