Protection Features - Eaton PT 10 Instruction Manual

2. Protection and Metering Features

2.2 Protection Features

Table 2. Protection Features
Protection
Curve Slope
Long Delay Pickup (I
Long Delay
Long Delay Time @ 6 x (l
Protection (L)
Thermal Memory
High Load Alarm 1
High Load Alarm 2
Curve Slope
Short Delay Pickup
Short Delay
Short Delay Time 8 x (l
Protection (S)
Short Delay Time Flat
Zone Interlock
Instantaneous
Instantenous
Protection 
Neutral Protection 4th Pole or External Neutral Trip
Ground Fault Pickup
Ground Fault alarm
Ground Fault Delay at
Ground (Earth)
0.625 x (I
Fault Protection
(Option G)
Ground Fault Delay Flat
Zone Interlock
Thermal Memory
Over Temperature Trip
General
Health monitor alarm
 If I t, I t, and It slope is selected, not all times are available, consult time-current curves.
4 0.5
 These settings on PT10 series modified with PTM.
 Only PT 25 supports zone interlocking.
4 PT UNIT USER MANUAL APRIL 2023 www.eaton.com.cn
) x (I
r
) Seconds
r
% x (I
% x (I
x (I
) l2t Seconds
r
Seconds
x (I
% x (I
x (I
x (I
Seconds
) l t
2
n
Seconds
°C
%
PT 10
I t
2
0.4, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9,
)
n
0.95, 0.98, 1.0
0.5, 1, 2, 4, 7, 10, 12, 15, 20, 24
Included
) OFF or % High Load Alarm 2 Adjustable step is: 1.0% 
r
) OFF or % High Load Alarm 1 to 120% Adjustable step is: 1.0% 
r
Fixed, I
t
2
) 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 10
r
0.1, 0.2, 0.3, 0.5
0.05, 0.1, 0.2, 0.3, 0.4, 0.5
) Off, 2, 4, 5, 6, 7, 8, 10, 12, 15
n
) 0 (Off), 60, 100 
r
) Off, 0.2, 0.4, 0.6, 0.8, 1.0
n
) 0.2, 0.4, 0.6, 1.0
n
0.1, 0.2, 0.3, 0.4, 0.5
0.1, 0.2, 0.3, 0.4, 0.5
Included 
85°C
1~50
PT 20/25
I t, I t, I t, It
2 4 0.5
0.4 to 1.0
Adjustable step is: 0.01
0.5 - 24S 
Adjustable step is: 0.1S
Included
Fixed, I t
2
1.5~ 10S Adjustable step is 0.1S
0.1 ~ 0.5 Adjustable step is 0.01
0.05~ 0.5 Adjustable step is 0.01
Enable/Disable 
Off, 2 ~ 15 Adjustable step is 0.1
0 (Off), 60, 100
OFF, 0.2~ 1.0 Adjustable step is 0.01
OFF, 0.2~ 1.0 Adjustable step is 0.01
0.1~ 0.5 Adjustable step is 0.01
0.1~ 0.5 Adjustable step is 0.01
Enable/Disable 
Included
85°C
1~50