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Table 3. Advanced Protection Features (PT25 only, unless specified additionally)
Protection
Over-voltage Pickup
Over-voltage Delay
Under-voltage Pickup
Voltage Protection
Under- voltage Delay
Voltage Unbalance Pickup
Voltage Unbalance Delay
Current Unbalance Pickup
Current Unbalance Delay
Current Protection
Phase Loss Pickup
Phase Loss Delay
Reverse Power Pickup
Power Protection
Reverse Power Delay
Over-frequency Pickup
Over-frequency Delay
Frequency Protection
Under-frequency Pickup
Under-frequency Delay
Positive Sequence (A-B-C)
Phase Sequence Protection
Reversed Sequence (A-C-B)
Current Demand Pickup
Current Demand Delay
Demand Protection
Power Demand Pickup
Power Demand Delay
Unit
Setting
V
180-720 adjustable
s
1~ 300 adjustable
V
60-670 adjustable
s
1- 300 adjustable
% V
5- 25 adjustable
s
1- 300 adjustable
% A
5- 25 adjustable
s
1- 300 adjustable
% A
75
s
1- 240 adjustable
kW
1- 65500 adjustable
s
1- 300 adjustable
Hz
40- 70 adjustable
s
0.2- 5 adjustable
Hz
40- 70 adjustable
s
0.2- 5 adjustable
3-phase voltage sequence is the same as the
setting, and the trip unit acts
x (I
)
0.2-1.0 adjustable
n
s
15-1500 adjustable
kW
1- 65500 adjustable
s
15-1500 adjustable
PT UNIT USER MANUAL APRIL 2023 www.eaton.com.cn
2. Protection and Metering Features
Note
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
Interval of 1
When Phase-A phase voltage
exceeds 100V, the frequency
Interval of 0.1
metering will start
Interval of 1
Interval of 0.1
When all three phase voltages
exceed 100V, the phase sequence
metering will start
Interval of 0.1
PT20/25 supports this function
Interval of 1
Interval of 1
Interval of 1
5
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