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Help CenterBeijing Sifang Csc - 281s Line Protection and Monitoring Device
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Beijing Sifang CSC-281S Line Protection and Monitoring Device
The CSC-281S is suitable for line protection and monitoring of neutral non-directly grounded systems with voltage levels below 35kV and can be installed locally in the switchgear.
Device Introduction
Protection Function |
PT Wiring Mode |
|
Three-phase Wiring |
VV Wiring |
|
Four-stage overcurrent protection, with the fourth stage fixed as inverse time limit |
Applicable |
Applicable |
Four-stage zero-sequence overcurrent protection, with the fourth stage fixed as inverse time limit |
Applicable |
Applicable |
Overload protection (optional to trip or send an alarm signal) |
Applicable |
Applicable |
Acceleration protection (pre-reclosure acceleration, post-reclosure acceleration, and acceleration after manual closing) |
Applicable |
Applicable |
Under-frequency load shedding |
Applicable |
Applicable |
Under-voltage disconnection |
Applicable |
Applicable |
Three-phase single reclosure |
Applicable |
Applicable |
Transient ground protection |
Applicable |
Not applicable |
Reverse power protection |
Applicable |
Not applicable |
Level cascading communication |
Applicable |
Applicable |
Cascading outlet |
Applicable |
Applicable |
Small current grounding line selection |
Applicable |
Not applicable |
Blocking simple bus protection |
Applicable |
Applicable |
1.1.1 Measurement and control functions
a) Acquisition of 25-channel switch inputs, remote signaling change of the device, and accident remote signaling;
b) Normal remote opening and closing of the circuit breaker;
c) Under the three-phase voltage wiring mode, remote measurement of analog quantities such as phase current (Ica, Icb, Icc), phase voltage (Ua, Ub, Uc), line voltage (Uab, Ubc, Uca), active power (P, Pa, Pb, Pc), reactive power (Q, Qa, Qb, Qc), power factor COSφ, and frequency ƒ;
d) Under the VV wiring mode, remote measurement of analog quantities such as phase current (Ica, Icb, Icc), line voltage (Uab, Ubc, Uca), total active power P, total reactive power Q, power factor COSφ, and frequency ƒ;
e) Event SOE recording.
1.1.2 Other functions
a) PT disconnection alarm;
b) CT disconnection alarm;
c) Control circuit disconnection alarm;
a) Spring uncharged alarm;
b) Switch input blocking closing, protection action blocking closing;
c) F-C overcurrent blocking;
d) Fuse switch input tripping;
e) TWJ abnormal alarm;
f) Fault wave recording;
g) 6 sets of setting value zones;
4-20mA output function.
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