Galvanic Isolation - T90, A92 - ABB DCS800 Hardware Manual

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Galvanic isolation - T90, A92

The Galvanic isolation is an option for converters in
the current range 2050...5200 A and rated voltages
≤1000 V. For converters with a rated voltage of
1190 V and 12-pulse serial > 2x 500 V the galvanic
isolation is a standard equipment. It is used to
replace the high-ohmic resistance voltage
measurement and gives the advantage of a total
isolation from power part to electronic part.
The transformer T90 and the DC transducer A92 are
located outside the converter module. The internal AC
and DC voltage measurement channels are opened and
connected to the T90 and A92 units.
Hard and software settings:
Voltage coding on measuring board
Construction type
Conv. nom. voltage [V] *
Rated mains voltage [V AC]
Value f. conv. nom. volt at
SET(TINGS) block *
Measuring board SDCS-
Resistors W1...W26
Galvanic isolation
Resistors Rx on PIN51
DC-DC transducer A92
Switch position R
Transformer T90
Secondary Terminals *
* 12-pulse serial and sequential have a different selection between S CONV NOM VOLT (42.08) and
the scaling of measurement channel. See 12-pulse manual for DCS 600.
Technical data
Y=4 (400V)
Y=5 (500V)
220...500
500
PIN-51
27.4 kΩ
8680A1
* 7 (675 V)
G
3ADT 745047
2U1
2V1
2W1
2N
3ADW000194R0201 DCS800 Hardware Manual e b
D5 / D6 / D7
Y=6 (600V) Y=7 (690V)
270...600 300...690
600 690
PIN-51 PIN-51
all resistors are 0 Ω
27.4 kΩ 27.4 kΩ
6 (810 V) 5 (945 V)
2U2 2U3
2V2 2V3
2W2 2W3
2N 2N
Y=8 (790V) Y=9 (1000V) Y=1 (1190V)
350...790 450...1000
800 1000
PIN-51 PIN-51
27.4 kΩ 27.4 kΩ
4 (1080 V) 2 (1350 V)
2U4 2U5
2V4 2V5
2W4 2W5
2N 2N
530...1190
1200
PIN-51
27.4 kΩ
1 (1620 V)
2U6
2V6
2W6
2N