DEMA CPM 310 G User Manual

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Protection and Reset Curves
DEMA CPM 310 G Overcurrent Protection Relays can employ and run IEC and IEEE / ANSI protection and reset
curves, as well as a wide range of special curves that are mostly used when CPM 310 G units are used in the
same selectivity scheme with older models of protection relays such as electromechanical relays. The wide
setting ranges make CPM 310 G compatible with most of the protection and selectivity schemes currently in
use worldwide.
CPM 310 G protection and reset curves, and formulas, parameters and setting ranges belonging to these are
given in the below table. The Thermal Overload Protection Function is studied in detail in its dedicated section -
for this, parameters and other information for thermal overcurrent protection is not given in the table. □
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Universal Formula for Protection Curves
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Universal Formula for Reset Curves
Table of CPM 310 G Protection and Reset Curves Parameters
Açıklama Kısaltma A
α (Açma
Faktörü)
B
Tres
α (Reset
Faktörü)
C Reset Tipi
Short Time Inverse
Kısa Zamanlı Ters
IEC STI 0.05 s 0.04 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
IEC
Standard Inverse
Normal Ters
IEC SI 0.14 s 0.02 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
IEC
Very Inverse
Çok Ters
IEC VI 13.5 s 1 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
IEC
Extremely Inverse
Aşırı Ters
IEC EI 80 s 2 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
IEC
Long Time Inverse
Uzun Zamanlı Ters
IEC LTI 120 s 1 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
IEC
Semiconductor Protection
Yarıiletken Koruma
SA Semic 35500 s 6 0 TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
Özel Eğri SA
Definite Inverse (DI)
Özel Sabite Yakın Ters (DI)
SB DI 2.96875 s 2.3 1.96875 s TMS 0.025-3.2 - - - DMT (0.04-100) s DMT
Özel Eğri SB
- - - DMT (0.04-100) s DMT
6.9 2 0 RTMS 0.025-3.2 IDMT
- - - DMT (0.04-100) s DMT
39.6 2 0 RTMS 0.025-3.2 IDMT
- - - DMT (0.04-100) s DMT
2.2 2 0 RTMS 0.025-3.2 IDMT
- - - DMT (0.04-100) s DMT
4.85 2 0 RTMS 0.025-3.2 IDMT
- - - DMT (0.04-100) s DMT
21.6 2 0 RTMS 0.025-3.2 IDMT
- - - DMT (0.04-100) s DMT
29.1 2 0 RTMS 0.025-3.2 IDMT
Definite Minimum Time
Sabit Zaman
DMT - - - DMT 0.01-150s - - - DMT (0.04-100) s DMT
-
Thermal Overload
Termik Aşırı Yük
IEC
IEC Koruma Eğrileri
bölümünde incelenmiştir.
Ayar Aralığı
0.025-3.2
0.025-3.2
0.025-3.2
0.025-3.2
0.025-3.2
0.025-3.2
1.05
0.68 s
TMS
0.02
0.114 s
TMS
SE CO-C3H
IEEE MI
19.61 s
28.2 s
SD CO8
IEEE / ANSI
2
0.491 s
TMS
2
0.1217 s
TMS
Özel Eğri SD
Özel Eğri SE
IEEE / ANSI
IEEE / ANSI
Very Inverse
Çok Ters
Extremely Inverse
Aşırı Ters
Reset Eğrisi Parametreleri
Ayar Aralığı
2
0.72 s
TMS
Short Time Inverse (CO2)
Özel Kısa Zamanlı Ters (CO2)
Long Time Inverse (SD CO8)
Özel Uzun Zamanlı Ters (SD CO8)
TMS
0.008 s
0.02
0.0092 s
SC CO2
IEEE VI
IEEE EI
Uygulanan
Standart
Koruma Eğrisi Parametreleri
Eğri Tipi
Standard Inverse (CO-C3H)
Özel Normal Ters (CO-C3H)
Moderately Inverse
Ilımlı Ters
21 s
1.81 s
0.0515 s
Özel Eğri SC

DEMA CPM 310 G Specifications

General

Brand	DEMA
Model	CPM 310 G
Category	Relays
Language	English