Siemens SIPROTEC 7UM62 User Manual

Technical Data
4.13 Impedance Protection (ANSI 21)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
485
4.13 Impedance Protection (ANSI 21)
Pickup
Impedance Measurement
Power Swing Blocking
Times
Pickup current IMP I>for I
N
= 1 A 0.10 A to 20.00 A Increments 0.01 A
for I
N
= 5 A 0.50 A to 100.00 A Increments 0.05 A
Dropout Ratio approx. 0.95
Measuring Tolerances acc. to VDE 0435 for I
N
= 1 A 1 % of setting value or 10 mA
for I
N
= 5 A 1 % of setting value or 50 mA
Undervoltage seal–in U< 10.0 V to 125.0 V Increments 0.1 V
Dropout Ratio approx. 1.05
Characteristic Polygonal, 3 independent stages
Impedance Z1 (secondary) for I
N
= 1 A 0.05 Ω to 130.00 Ω Increments 0.01 Ω
Impedance Z1 (secondary) for I
N
= 5 A 0.01 Ω to 26.00 Ω
Impedance Z1B (secondary) for I
N
= 1 A 0.05 Ω to 65.00 Ω Increments 0.01 Ω
Impedance Z1B (secondary) for I
N
= 5 A 0.01 Ω to 13.00 Ω
Impedance Z2 (secondary) for I
N
= 1 A 0.05 Ω to 65.00 Ω Increments 0.01 Ω
Impedance Z2 (secondary for I
N
= 5 A 0.01 Ω to 13.00 Ω
Measuring tolerances acc. to VDE 0435 with
sinusoidal quantities
|ΔZ/Z| ≤ 5 % for 30° ≤ ϕ
K
≤ 90° or 10 mΩ
Power swing polygon-trip polygon
(secondary)
for I
N
= 1 A 0,10 Ω up to 30.00 Ω Increments 0.01 Ω
Power swing polygon-trip polygon
(secondary)
for I
N
= 5 A 0,02 Ω up to 6.00 Ω
Rate of change dz/dt for I
N
= 1 A 1,0 Ω/s to 600.0 Ω/s Increments 0.1 Ω/s
Rate of change dz/dt for I
N
= 5 A 0,2 Ω/s to 120.0 Ω/s
Power Swing Blocking Action Time 0,00 s to 60,00 s
or ∞ (ineffective)
Increments 0.01 s
Delay Times 0.00 s to 60.00 s or ∞ (ineffective) Increments 0.01 s
Shortest Tripping Time 35 ms
Typical Tripping Time approx. 40 ms
Dropout Time approx. 50 ms
Holding Time of Undervoltage Seal-In 0.10 s to 60.00 s Increments 0.01 s
Delay Time Tolerances 1 % of setting value or 10 ms

Siemens SIPROTEC 7UM62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7UM62
Category	Protection Device
Language	English