Thytronic SME70, Manual

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8
SME70, SME70-C, SME70-M-Manual-04-2020
INPUT CIRCUITS
— Auxiliary power supply Uaux
Rated voltage 24 V-
Nominal value (range) 19.2...28.8 V-
Max alternating component 10%
Maximum time at power ON 0.10 s
Power consumption at rest condition 2.5 W
Max power consumption <3 W
— Rated frequency
f
n
Rated value 50, 60 Hz (sw setting)
Range 47.5...51.5 Hz ( f
n
= 50 Hz)
57.5...61.5 Hz ( f
n
= 60 Hz)
— Sensor inputs
Current transformers
Type Rogowski open core
Coupling Bayonet
Inside diameter 95 mm
Rated transformation ratio 1000 A/0.100 V
Bandwidth 40 Hz...20 kHz
Connection to SME70
• type bipolar shielded wires
• section 0.15 mm
2
• length 3.5 m
Voltage inputs
Type Capacitive voltage dividers
Plug DY811
MV rated voltage 6...36 kV
Capacitive reactance (MTV side) 100...700 MΩ
Connection to SME70
• type shielded wires
• section 0.5 mm
2
• length 3.0 m
—
Binary input
Quantity 1
Type optocoupler
Operative range rated U
aux
Max consumption, energized 3 mA
OUTPUT CIRCUITS
— Relays
Quantity 3
Type of contacts make (SPST-NO, type A)
Nominal current 2 A
Nominal voltage 250 V
Breaking capacity (24 V, L/R = 40 ms) 0.2 A
Minimum switching load 300 mW (5 V/5 mA)
Each output relay is independently programmable as normally energized or de-energized (
ENER-
GIZED/DE-ENERGIZED
)
— Current converter
Operating range 100...900 A (step 10 A)
Output current 4...20 mA
With 67N element active inside the no trip sector 0 mA
Accuracy 10%
Max load 750 Ω
Maximum response time 300 ms
CONNECTION TO THE REMOTE CONTROL UNIT
Type 9 wires multipolar cable
Section 1 mm
2
Length 8 m