Basler BE1-CDS220, Instruction Manual

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BE1-CDS220 Testing And Maintenance 13-39
Sidebar 13-7. Average Restraint When Decreasing One Input from Balance - Continued
with the minimum trip point established as:
I
1trip min
= I
2balance
- minpu in per unit
where: minpu is the minimum pickup setting
Under test and in-service conditions, the following equations determine whether the relay operates along
the flat minimum pickup or slope of the operating characteristic. If
I
restraint at balance
> minpu x






+
2 / 1
100 /
1
slope
in per unit, use the 1
st
equation, or if
I
restraint at balance
< minpu x






+
2 / 1
100 /
1
slope
in per unit, use the 2
nd
equation.
Step 12. Send the commands listed in Table 13-23 to the relay.
Table 13-23. Setup Commands
Command Purpose
A= Gain access
S#-87=0.35, 15A ,0,0,0,1 Minpu = 0.35, slope = 15% (of average restraint),
2
nd
= disabled, 5
th
= disabled, URO= disabled, 2
nd
harm sharing =1 (yes)
E Exit
Y Save settings
Step 13. Apply balancing current to phase A input 1 and phase A input 2 at the magnitude indicated in
each row of either Table 13-24 (5 ampere sensing) or 13-25 (1 ampere sensing) and slowly
increase phase A input 1 until OUT1 closes. Reference the corresponding table to verify pickup
accuracy.
Table 13-24. Maximum Restraint Pickup Test Points (5 A Sensing Input)
Sensing Input 1 Input 2 Increasing Input 1 Decreasing Input 2
Input Minimum slope tap = 2.00 tap = 3.80 From Balance From Balance
Type Pickup (%) Bal. Input (A) PU Bal. Input (A) PU Pickup (A) Pickup (A)
5 0.35 15 2.00 1 3.80 1 2.70
±
0.108 2.47
±
0.099
5 0.35 15 10.00 5 19.00 5 11.62
±
0.465 16.35
±
0.654
5 0.35 30 2.00 1 3.80 1 2.70
±
0.108 2.47
±
0.089
5 0.35 30 10.00 5 19.00 5 13.53
±
0.541 14.04
±
0.562
5 0.35 45 2.00 1 3.80 1 3.16
±
0.126 2.40
±
0.096
5 0.35 45 10.00 5 19.00 5 15.81
±
0.632 12.03
±
0.481
5 0.35 60 2.00 1 3.80 1 3.71
±
0.148 2.04
±
0.096
5 0.35 60 10.00 5 19.00 5 18.57
±
0.743 10.22
±
0.409