Siemens Protection Devices Limited 6
High frequency disturbance
IEC 60255-22-1 class III
2.5kV longitudinal mode
1.0kV transverse mode
≤ 3% deviation
Electrostatic Discharge
IEC 60255-22-2 class III
8kV, Contact discharge
≤ 5% variation
Fast transient
IEC 255-22-4 class IV
4kV, 5/50ns, 2.5 kHz,
repetitive
≤ 3% variation
Conducted RFI
IEC 60255-22-6 class IV
10 V, 0.15 to 80 MHz
≤ 5% variation
Conducted Limits
IEC 60255-25
Limits dB(µV)
Frequency Range
Quasi-peak Average
0.15 to 0.5 MHz 79 66
0.5 to 30 MHz 73 60
Radiated Limits
IEC 60255-25
Frequency Range
Limits at 10 m
Quasi-peak, dB(µV/m)
30 to 230 MHz 40
230 to 10000 MHz 47
Radio frequency interference
IEC60 255-22-3
10 V/m, 20 to 1000 MHz
≤ 5% variation
Temperature
IEC 68-2-1/2
Operating range -10°C to +55°C
Storage range -25°C to +70°C
Humidity
IEC 68-2-3
Operational test 56 days at 40°C and 95%
RH
General Accuracy
Reference Conditions
General IEC 60255-3
Current settings 100% of In
IDMTL: 2 to 30 xIs Current input
DTL: 5 xIs
Auxiliary supply Nominal
Frequency 50 Hz
Ambient temperature
20 °C
General Settings
Transient overreach of
highset/lowset (X/R =
100)
≤ -5 %
Disengaging time (see
note)
< 42 ms
Overshoot time < 40 ms
Note. Output contacts have a programmable minimum dwell
time, after which the disengaging time is as above.
Accuracy Influencing Factors
Temperature
-10 °C to +55 °C ≤ 5 % variation
Frequency
47 Hz to 52 Hz
57 Hz to 62 Hz
Level:
≤ 5 % variation
Operating
time:
≤ 5 % variation
Harmonic content: Phase-fault and earth-fault elements
only. SEF elements reject all harmonics.
Frequencies to 550
Hz
≤ 5 % variation
Overcurrent protection
Characteristic
Setting IEC Normal Inverse (NI)
IEC Very Inverse (VI)
IEC Extremely Inverse (EI)
IEC Long Time Inverse,(LTI )
DTL
No. of elements 1
Level
Setting Range Is 0.05, 0.1…2.5 x In
Operate: 105% Is, ±4% or
±1%xIn
Accuracy
Reset ≥ 95% of operate current
Repeatability ± 1%
IDMTL Time Multiplier
Setting 0.025, 0.05…1.6
Accuracy ± 5% or ± 30 ms
Repeatability ± 1% or ± 5 ms
DTL Delay
Setting 0.00 to 20.00 sec
Performance
Environmental
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