25
PT UNIT USER MANUAL
APRIL 2023 www.eaton.com.cn
11. Record Keeping
11. Record Keeping
The forms in this section can be used to record reference information and the initial protection settings. The PTM software also
provides printable copies of configuration and test results. If desired, make a copy and attach it to the side of the circuit breaker’s
cassette or another visible location. This information should be used and maintained by the responsible personnel.
Table 12. The PT Trip Unit Reference Information and Protection Settings.
PT 20/25 Trip Unit – Trip Function Settings
Circuit Breaker No./Location:
Circuit Breaker Order Reference:
Amperes Rating (
I
n
):
Continuous Ampere Rating (
I
r
)：
Protection Settings (Circle the Selected Value)
Long Delay
Pickup
0.4
0.5
0.6
0.7
.75
0.8
0.9
.95
.98
1.0
I
r
A
Time
0.5
1
2
4
7
10
12
15
20
24
t
r
sec
Short Delay
Pickup
1.5
2
2.5
3
4
5
6
7
8
10
I
sd
A
Time
.05
0.1
0.2
0.3
0.4
0.5
0.1
0.2
0.3
0.5
t
sd
sec
Flat
I
2
t Curve
Instantaneous
Pickup
2
4
5
6
7
8
10
12
15
OFF
Ii
A
Ground
Pickup
0.2
0.4
0.6
1.0
0.2
0.4
0.6
0.8
1.0
OFF
I
g
A
Alarm only
Trip
Time
0.1
0.2
0.3
0.4
0.5
0.1
0.2
0.3
0.4
0.5
t
g
sec
I²t
Protection Settings (Circle the Selected Value)
Default
Language
English
Chinese
Communication
No CAMS
Modbus Port
Long Delay Curve
I
2
t
I
0.5
t
It
I
4
t
Ground Fault
Residual
Source/Zero Seq
Neutral
N = 100%
N = 60%
N = 0%
Power Feed Direction
Forward
Reverse
ZSI
OFF
ON
