CYG PRS-7367 - Measurement Range and Accuracy; Protection Function Features

Technical Specifications
PRS-7367 27
2.7 Measurement Range and Accuracy
Metering Item
Range
Accuracy
Phase range
0° ~ 360°
≤ 0.5% or ±2°
Frequency
35.00Hz ~ 70.00Hz
≤ 0.01Hz
Current
(three phase 3Ip)
0.05In<I<4In
±0.5%In, I≤In;
±0.5%I, I>In
Voltage
(Phase 3Up, Phase-to-Phase 3Upp)
0.05 Un<U<1.50Un
±0.5%Un, U≤Un;
±0.5%U, U>Un
P, Q, S,
0.2In<I<4In
0.1 Un<U<1.5Un
±1% for power (S, P and Q)
power factor cos
±0.02 for power factor
2.8 Protection Function Features
2.8.1 Overcurrent Protection
Function
Accuracy
Operate current
±1.0% of the set value or ±0.005 × In
Blocking voltage
±1.0% of the set value or ±0.005 × Un
Reset time
≤45ms
Reset ratio
Typically 96%(±3%), Or (
et 0.005
et
S Value In
S Value

)(±3%)
Tolerance of operating time at instantaneous time
mode without directional and voltage control element
≤25 ms at I=2xstart value
Tolerance of operating time at definite time mode
±1 .0% of the set value or ±40 ms
Tolerance of operating time at inverse time mode
±5.0% of the theoretical value or ±40 ms,
Start value multiples in range of 1.2...20 when I>In,
Start value multiples in range of 2...20 when I≤In.
DIR criteria
≤±2°
Transient overreach accuracy（this Accuracy
standards is only for Indonesia）
<10%
Transient accuracy overshoot
≤40ms
Note: Transient overreach accuracy: 10%
Variable testing
 Flow setting Is: 1.0 x In
 Setting time ts: 0 seconds (Instant)
 Test flow Itest: 0.98 x I s + DC offset
 Data retrieval: 5 repetitions in each case
Calculation of transient overreach values:
[%] ( 2 / 1 1)*100%TransientOverreach Is Is
Where:
Is1: The Current settings when the relay does not work without conditions DC offset
Is2: The current setting when the relay does not work in situations where DC offset