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EATON
www.eaton.com
Protection characteristics of PXR6.1A / PXR6.1E / PXR6.1P intelligent controller
Overload long delay time
Acting current set point Ir Current tolerance ±10% (0.4 ~ 1.0) × In + OFF (Step is 1A or 2A)
Acting time tr
Tolerance ±15%
Current
Action time
≤
1.05Ir
No action within 2 hours
>1.20Ir
Action within 1 hour
Curve type (I²r by default)
Setting time tr (Coeffi cient K in brackets)
Standard inverse time
t = K/(N0.02-1)
0.61 (0.005)
0.98 (1.0)
1.47 (0.012)
2.46 (0.02)
3.68 (0.03)
4.91 (0.04)
6.14 (0.05)
9.21 (0.075)
11.1 (0.09)
17.2 (0.14)
24.6 (0.2)
36.8 (0.3)
49.1 (0.4)
61.4 (0.5)
73.7 (0.6)
86 (0.6)
Fast inverse time
t = K/(N-1)
2 (1)
3.2 (1.6)
4.8 (2.4)
8 (4)
12 (6)
16 (8)
20 (10)
27 (13.5)
36 (18)
56 (28)
80 (40)
120 (60)
160 (80)
200 (100)
240 (120)
280 (140)
Extremely fast inverse
t = K/(N²-1)
8 (10)
12.8 (16)
19.2 (24)
32 (40)
48 (60)
64 (80)
80 (100)
108 (135)
144 (180)
224 (280)
320 (400)
480 (600)
640 (800)
800 (1000)
960 (1200)
1040 (1300)
Extremely fast inverse
t = (K/1.15) × loge
[N²/(N²-1.15)]
6.22 (10)
9.96 (16)
14.9 (24)
24.9 (40)
37.3 (60)
49.8 (80)
62.2 (100)
84 (135)
112 (180)
174 (280)
249 (400)
373 (600)
498 (800)
622 (1000)
747 (1200)
809 (1300)
HV fuse compatible
t = K/(N4-1)
2.46 (10)
3.94 (16)
5.9 (24)
9.85 (40)
14.8 (60)
19.7 (80)
24.6 (100)
33.2 (135)
44.3 (180)
68.9 (280)
98.5 (400)
147 (600)
197 (800)
246 (1000)
295 (1200)
320 (1300)
I²T
t = (1.5/N)² × K
8 (8)
15 (15)
30 (30)
60 (60)
120 (120)
240 (240)
360 (360)
480 (480)
600 (600)
720 (720)
840 (840)
960 (960)
otes:
N
N = I/Ir (I is the actual fault current, Ir is the overload current set value). The above set time value is the action delay time when I = 1.5Ir. As the current increases,
the delay time will be shortened accordingly and can be calculated to the curve formula.
Thermal memory protection
Instantaneous, 10m,20m,30m,45m,1h,2h,3h+OFF (can be eliminated upon power off)
Short circuit short delay time
Acting current set point
Isd
Current tolerance ±10%
(1.5~15) × Ir+OFF (Step is 1A or 2A)
Acting time tsd
Tolerance ±15%
Fixed time delay set point 0.1~0.4s (Step is 0.1s)
Inverse time delay
The curve is the same as the overload long delay curve; the curve speed is 10 times faster than the overload long
delay’s (the time calculated to the overload delay curve formula divided by 10 is the short delay inverse delay time)
Thermal memory protection
Subject to long delay settings
otes:
N
When the inverse time and fi xed time protection are both enabled, the inverse time current set point must be less than the fi xed time current set point. Otherwise,
the inverse time function will automatically fail, and the actual delay time is not less than the fi xed time’s set time.
Short circuit instantaneous
Acting current set point Ii Current tolerance ±10% (1~15)× In+OFF (Min. 1In)
Action characteristics
No action when
≤
0.85Ii
Action when >1.15Ii
Grounding protection
Acting current setting Ig Current tolerance ±10% (0.2~1.0)× In+OFF (Min. 100A)
Action characteristics
No action when <0.8Ig
Delay action when
≥
1.0Ig
Action time tg
Tolerance ±15%
Fixed time
0.1~0.5s+OFF (Step is 0.1)
Inverse time (ON)
Fixed time when I>0.625In
Inverse time when I
≤
0.625In
Inverse time formula
t = (0.625In)²tg/I²
t = delay time, Tg = set delay time, In = rated current
Action mode: Trip + OFF
Ground alarm (ground alarm is independent from ground protection; both functions have their own independent parameter settings and can co-exist at the same time)
Alarm action setting
Current
(0.2~1.0)×In (Min. 100A)
Time
0.1~1s (Step is 0.1)
Alarm dismiss setting
Current
(0.2~1.0)×In (Min. 100A)
Time
0.1~1s (Step is 0.1)
Neutral-pole protection
Acting current setting IN Current tolerance ±10% (0.5,1.0,1.6,2.0) × In + OFF
Action time
Same as the overload long delay time
Current imbalance protection
Protection setting
10%~60% (Step is 1%)
Delay time
0.2s-60s (Step is 0.1s)
Protection return setting
10%~start value (Step is 1%)
Delay time
10s~200s (Step is 1s)
Action characteristics or alarm characteristics
No action when
≤
0.9
δ
Delay action or alarm when>1.1
δ
Action mode: Trip + alarm + OFF
Load monitoring
Method 1
Setting current Ic1 Ic2
(0.2~1) × Ir (min. 100A, Step is 1A)
Inverse delay time tc1 tc2
(20%~80%)×tr
Method 2
Setting current Ic1 (unload value)
(0.2~1) × Ir (min. 100A)
Setting current Ic2 (return value)
0.2×Ir ~ Ic1
Inverse delay time tc1
(20%~80%)×tr
Fixed delay time tc2
10s~600s
Instruction Leafl et
Effective September 2022
IZM6 Series Air Circuit Breaker
Operating Instruction Leafl et