Technical data
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3ADW000194R0611 DCS800 Hardware Manual f us
Armature circuit interface
The function for armature circuit interface consist of:
• Firing the armature bridge of 6 or 12 thyristors.
• High ohmic measurement of DC and AC voltage.
• Interface for AC current transformer for current measurement.
• Snubber circuit for the thyristor protection together with resistor R1 on heatsink.
• Interface for heatsink temperature measurement with a PTC resistor.
• Fuses for overvoltage protection and field circuit.
The same board can be used for 3 phase field exciters without modification.
The current measurement is adjusted by TYPECODE parameter 97.01 and automatic adjusted by
rated motor current setting.
Field circuit interface
The On board field exciter is located internally. The firing pulses are synchronized from mains circuit L1,
L2, L3 and SDCS-CON-4 board. The pulses are amplified on PIN4 board. The hardware structure is a
three phase half controlled bridge supplied direct from mains circuit U1, V1 , W1 via fuses F100, F101,
F102.
If the On board field exciter is not needed it can be switched OFF by firmware.
The function of field circuit interface consists of:
• Firing the field bridge three phase half controlled bridge.
• Measurement of DC field current, the scaling is automatically selected via rated motor field current.
• Snubber circuit are shared with armature bridge.
• Fuses F100, F101, F102 for cable and motor field protection.
• 600 V converter are always without Onboard field exciter
Ratings
AC voltage range 110...500 V (525 V)
AC insulation voltage 500 V
Frequency 50 Hz / 60Hz
AC input current < field current
Minimum Current 300 mA
Size D1 D2 D3 D4
DC output current 6A 15A 20A 25A
max. cross sectional area 6 mm²
AWG 10
6 mm²
AWG 10
6 mm²
AWG 10
6 mm²
AWG 10
min. cross sectional area 1 mm²
AWG 16
2.5 mm²
AWG 13
4 mm²
AWG 11
6 mm²
AWG 10
Fuse type KTK - 25
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