ABB ACS880-07, Руководство по оборудованию

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￭ Overview circuit diagram of the drive
„
M
3~
1
2
3
4
6
8
12
13
7 7
6
5
10
9
11
AC supply
*Main switch-disconnector (Q1.1) 1
*AC fuses. 2
Frames 1×D8T + 2×R8i (6-pulse), 2×D7T + 2×R8i (12-pulse), 2×D8T + n×R8i(12-pulse) have AC
fuses installed in the incoming cubicle (ICU) only. Frames 2×D8T + 2×R8i and above (6-pulse) and
4×D8T + n×R8i (12-pulse) have AC fuses installed for each supply module in the supply module
cubicle(s). Additional common AC fuses are installed in the incoming cubicle (ICU) if optional main
contactor (+F250) is present.
*Main contactor (Q2.1). Optional (+F250) with frames 2×D7T + 2×R8i, 2×D8T + 2×R8i and
2×D8T + 3×R8i. 12-pulse units have two contactors (Q2.1 and Q2.2). 3
*With larger units, an air circuit breaker is either optional (+F255) or standard, replacing items 1…3. Each
supply module has dedicated AC fuses installed in the supply module cubicle(s).
Supply module. Converts alternating current and voltage to direct current and voltage. The ACS880-
07 has 1…4 supply modules connected in parallel. 12-pulse units have either one or two supply
modules per each 6-pulse supply line. 4
DC bus 5
Inverter DC fuses 6
Inverter module. Converts direct current and voltage to alternating current and voltage. The ACS880-
07 has 2…5 inverter modules connected in parallel. 7
Motor 8
**Brake chopper DC fuses 9
**Brake chopper. Conducts surplus energy from the intermediate DC circuit of the drive to the brake
resistor when necessary. The chopper operates when the DC voltage exceeds a certain maximum
limit.The voltage rise is typically caused by deceleration (braking) of a high inertia motor. 10
**Brake resistors 11
**Brake chopper (+D150) and resistors (+D151) are optionally available for frame sizes 1×D8T + 2×R8i and
up. See chapter
Resistor braking (page 265) .
Auxiliary voltage switch (Q21) with fuses 12
30 Operation principle and hardware description