Iec Inverse Time Protection Curves - DEMA 400 Series User Manual

Eğri Tipi
Açıklama
Short Time Inverse
Kısa Zamanlı Ters
Standard Inverse
Normal Ters
Very Inverse
Çok Ters
Extremely Inverse
Aşırı Ters
Long Time Inverse
Uzun Zamanlı Ters
Semiconductor Protection
Yarıiletken Koruma
Definite Inverse (DI)
Özel Sabite Yakın Ters (DI)
Short Time Inverse (CO2)
Özel Kısa Zamanlı Ters (CO2)
Long Time Inverse (SD CO8)
Özel Uzun Zamanlı Ters (SD CO8)
Standard Inverse (CO-C3H)
Özel Normal Ters (CO-C3H)
Moderately Inverse
Ilımlı Ters
Very Inverse
Çok Ters
Extremely Inverse
Aşırı Ters
Definite Minimum Time
Sabit Zaman
Thermal Overload
Termik Aşırı Yük
4.3.1.1

IEC Inverse Time Protection Curves

The "IEC (International Electrotechnical Commission) 60255-3, Electrical relays - Part 3:
Single input energizing quantity measuring relays with dependent or independent time"
standard defines the following protection curves.
1. IEC Short Time Inverse: IEC STI.
2. IEC Standard Inverse: IEC SI.
3. IEC Very Inverse: IEC VI.
4. IEC Extremely Inverse: IEC EI.
5. IEC Long Time Inverse: IEC LTI.
Universal trip time delay formula is given above, while IEC constants for various curves are
given on the below table.
t Trip delay (s).
A A constant for the characteristic (s).
I Momentary current (A).
Is Set current threshold (A).
α A constant for the characteristic (-).
B A constant for the characteristic (s).
��
t= [
1 − (
Universal Formula for Reset Curves
Koruma Eğrisi Parametreleri
α (Açma
Kısaltma A
Faktörü)
IEC STI 0.05 s 0.04
IEC SI 0.14 s 0.02
IEC VI 13.5 s 1
IEC EI 80 s 2
IEC LTI 120 s 1
SA Semic 35500 s 6
SB DI 2.96875 s 2.3 1.96875 s TMS 0.025-3.2
SC CO2 0.0092 s 0.02
SD CO8 21 s 2
SE CO-C3H 1.81 s 1.05
IEEE MI 0.0515 s 0.02
IEEE VI 19.61 s 2
IEEE EI 28.2 s 2
DMT - -
t= [
(
������
+ C] × RTMS
I
a
)
I
s
α (Reset
Ayar Aralığı
B T
res
Faktörü)
0 TMS 0.025-3.2 -
0 TMS 0.025-3.2 -
0 TMS 0.025-3.2 -
0 TMS 0.025-3.2 -
0 TMS 0.025-3.2 -
0 TMS 0.025-3.2 -
-
-
0.008 s TMS 0.025-3.2
6.9
-
0.72 s TMS 0.025-3.2
39.6
-
0.68 s TMS 0.025-3.2
2.2
-
0.114 s TMS 0.025-3.2
4.85
-
0.491 s TMS 0.025-3.2
21.6
-
0.1217 s TMS 0.025-3.2
29.1
- DMT 0.01-150s -
IEC Koruma Eğrileri
bölümünde incelenmiştir.
A
+B] ×TMS
I
a
-1
)
I
s
43
Reset Eğrisi Parametreleri
Ayar Aralığı
C Reset Tipi
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
2 0 RTMS 0.025-3.2
- - DMT (0.04-100) s
Uygulanan
Standart
DMT IEC
DMT IEC
DMT IEC
DMT IEC
DMT IEC
DMT Özel Eğri SA
DMT Özel Eğri SB
DMT
Özel Eğri SC
IDMT
DMT
Özel Eğri SD
IDMT
DMT
Özel Eğri SE
IDMT
DMT
IEEE / ANSI
IDMT
DMT
IEEE / ANSI
IDMT
DMT
IEEE / ANSI
IDMT
DMT -
IEC