SACE EMAX 2 NEW LOW VOLTAGE POWER C I RCUI T BRE AKERS TO ANS I C37 / UL 1066 / CSA STANDARDS
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— Technical characteristics for protection trip units Protection functions
ABB Code ANSI Code Function
Threshold
Threshold step
Trip time
Time Step 0.01s
OV
59
Overvoltage protection
U9 = 1.02….1.5 x Un
0.001 x Un with U > U9, t9 = 0.05…120s
Tolerance
± 2%
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s) with unbalance > U14, t14 = 0.5...60s The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
VU
47
Voltage unbalance protection
U14 = 2…90% Un unbalance 1%Un
0.5s
Tolerance
± 5%
UF
81L
Underfrequency protection
f12 = 0.9….0.999 x fn ± 1% (with fn ±2%)
0.001 x fn with f < f12, t12 = 0.06…300s
0.01s
Tolerance
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
OF
81H
Overfrequency protection
f13 = 1.001….1.1 x fn ± 1% (with fn ±2%)
0.001 x fn with f > f13, t13 = 0.06…300s
0.01s
Tolerance
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
RP
32R
Reverse active power protection
P11 = -1…-0.05 Sn
0.001 Sn with P > P11, t11 = 0.5…100s
0.1s
Tolerance
± 10%
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
ABB: Cyclical direction
47
Cyclical direction of the phases
1-2-3 or 3-2-1
ABB: Power factor LC1/2 Iw1/2
78
3phase Power factor
PF3 = 0.5…0,95
0.01
Current threshold
LC1 =50%...100% I1 LC2 =50%...100% I1 Iw1 = 0.1…10 In Iw2 = 0.1…10 In Activation: up/down
1% 1% 0.01 x In
Tolerance
± 10%
S2
50TD
Time-delayed overcurrent protection I5 = 0.6...10 x In
0.1 x In
With I > I5, t5 = 0.05...0.8s
0.01s 0.01s 0.01s
68
Zone selectivity
t5sel = 0.04…0.2s Range: 0.1…30s
Start up Tolerance
Activation: 0.6…10 x In
0.1 x In
± 7% I ≤ 6 x In ± 10% I > 6 x In I7 = 0.6...10 x In
The better of the two data: ± 10% or ± 40 ms with I > I7, t7 = 0.1...0.8s
D
67
Directional overcurrent protection (forward &/or backward)
0.1 x In
0.01s
68
Zone selectivity
t7sel = 0.1…0.8s Range: 0.1…30s
0.01s 0.01s
Start up (forward &/or backward)
Activation: 0.6…10 x In forward &/or backward
0.1 x In
Trip direction
Minimum angle direction (°)
3.6, 7.2, 10.8, 14.5, 18.2, 22, 25.9, 30, 34.2, 38.7, 43.4, 48.6, 54.3, 61, 69.6
Tolerance
± 7% I ≤ 6 x In ± 10% I > 6 x In
The better of the two data: ± 10% or ± 40 ms
UV2
27
Undervoltage Protection
U15 = 0.5….0.98 x Un
0.001 x Un with U < U15, t15 = 0.05…120s
0.01s
Tolerance
± 2%
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
OV2
59
Overvoltage protection
U16 = 1.02….1.5 x Un
0.001 x Un with U > U16, t16 = 0.05…120s
0.01s
Tolerance
± 2%
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
UF2
81L
Underfrequency protection
f17 = 0.9….0.999 x fn ± 1% (with fn ±2%)
0.001 x fn with f < f17, t17 = 0.15…300s
0.01s
Tolerance
The better of the two data: ± 10% or ± 40 ms (for t<5s) / ± 100 ms (for t ≥ 5s)
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