Thytronic DMC3S - Automatic Reclosing - 79; Measurements; Precision (Type Tests)

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DMC3S - Manual - 08 - 2021
3.9 MEASUREMENTS
— Precision (type tests)
VALUE Reference value Tolerance Reference value Tolerance
Measured phase current ≥ 20 mA 1% < 20 mA 1% ± 2 mA
Reconstructed phase current ≥ 20 mA 1% < 20 mA 1% ± 2 mA
Measured residual current ≥ 20 mA 1% < 20 mA 1% ± 2 mA
Calculated residual current ≥ 20 mA 1% < 20 mA 1% ± 2 mA
Phase voltage ≥ 1 V 1% < 1 V 1% ± 50 mV
Measured residual voltage ≥ 1 V 1% < 1 V 1% ± 50 mV
Calculated residual voltage ≥ 1 V 1% < 1 V 1% ± 50 mV
Power ≥ 20 mA and ≥ 1 V 1% < 20 mA or < 1 V 2.5 %
Frequency 0.02 Un 5 mHz 1 U
n
3 mHz
Angles (protection 67) ≥ 20 mA and ≥ 1 V 0.5° < 20 mA or < 1 V 1°
Angles (protection 67N) ≥ 0.005 I
En
and 0.01 U
En
0.5° < 0.005 I
En
and 0.01 U
En
1°
Startup and operating time 1.2 x threshold regulation 1.5% ± 5 ms
— Measurements
Direct
Frequency (f)
RMS fundamental phase currents (I
L1
, I
L2
, I
L3
)
RMS fundamental phase voltages (U
L1
, U
L2
, U
L3
)
RMS fundamental residual current (I
E
)
RMS fundamental residual voltage (U
E
)
RMS fundamental unbalance current (I
SQL
)
RMS fundamental neutral current (I
Ne
)
Auxiliary voltage
Auxiliary voltage (U
aux
)
Breaker coils current
Breaker coils current (I
CBcoil
)
Calculated
Phase-to-phase voltages (U
12
, U
23
, U
31
)
Calculated residual voltage (U
EC
)
Reconstructed L2 phase current (I
L2C
)
Maximum current between I
L1
-I
L2
-I
L3
(I
Lmax
)
Minimum current between I
L1
-I
L2
-I
L3
(I
Lmin
)
Mean current between I
L1
-I
L2
-I
L3
(I
L
)
Maximum voltage between U
L1
-U
L2
-U
L3
(U
Lmax
)
Mean voltage between U
L1
-U
L2
-U
L3
(U
L
)
Maximum voltage between U
12
-U
23
-U
31
(U
max
)
Mean voltage between U
12
-U
23
-U
31
(U)
Phase shift
Phase shift of I
L1
relative to U
L1
(PhiL1)
Phase shift of I
L2
relative to U
L2
(PhiL2)
Phase shift of I
L3
relative to U
L3
(PhiL3)
Phase shift of I
L1
relative to U
23
(Alpha1)
Phase shift of I
L2
relative to U
31
(Alpha2)
Phase shift of I
L3
relative to U
12
(Alpha3)
Phase shift of U
E
relative to I
E
(PhiE)
Phase shift of U
EC
relative to I
E
(PhiEC)
— Automatic reclosing - 79
Reclosing program (79 Mode) Rapid/Rapid+Slow
Number of memorised reclosings (N.DAR) 0...5 (step 1)
Rapid wait (t
rdt
) 0.10...1.00 s (step 0.01 s)
Slow wait (t
sdt
) 1...200 s (step 1 s)
Phase trip neutralisation time (t
rf
) 1...200 s (step 1 s)
Ground trip neutralisation time (t
rt
) 1...200 s (step 1 s)
Rapid closing discrimination time (t
dr
) 0...10 s (step 1 s)
Slow closing discrimination time (t
dl
) 0...10 s (step 1 s)
Memorized closing discrimination time (t
dm
) 0...10 s (step 1 s)
Intentional closing discrimination time (t
d
) 1...10 s (step 1 s)