ABB ACS 502 Series, Инструкция по установке и запуску, Страница: 27 / 92

Chapter 2 – Overview of the ACS 502/504
ACS 502 Installation & Start-up Manual 2-13
Table 2-4 ACS 504 Inverter Module Component Description
GENERAL WARNING! The ACS 504 Inverter Module does not include
fuses within the module. Fuses are supplied for separate mounting.
Component Component Description
R14, V14 Pre-charging circuit for limiting the current surge when power is first applied.
V11, V12, V13 Rectifier bridge. This is a half-controlled thyristor bridge. During pre-charging, the thyristors are blocked and
thereafter they are gated fully conducting.
A8 Input Protection Card SNAT 7902 INP. This contains gate trigger circuits for the rectifier thyristors, capacitors,
and varistors to protect the bridge. It also contains fuses to protect the fan.
L11, C14 – C16,
R11 DC-filter choke and capacitors with discharge resistors. Note: In 600 volt units, L11 (DC-filter choke) is omitted
and replaced by a three-phase AC choke at L1, L2, and L3. 600 volt units also have a three-phase AC output
choke at T1, T2, and T3.
V1
–
V6 Inverter insulated gate bipolar transistors (IGBT) and clamp circuits.
A3 Main Circuit Interface Card SNAT 7261 INT. This card contains the power supply, transistor gate trigger cir-
cuits, and DC-voltage and motor current measurement circuits.
A7 Small card on top of SNAT 7261 INT. This contains the power range programming information for the ACS 504
hardware.
(SNAT xyz5 SCL, where xyz is the kVA rating of the Module).
U21, U22 Current transducers for motor current measurement.
Y61, Y62 Cooling fan(s) and associated transformer (T61). Note: the transformer connection must be made according to
the actual supply voltage. Supply voltage is set to 500 V at the factory.
R7 Measures the temperature of the heatsink. The thermostat (S1) provides thermal protection for those parts that
are not covered by R7.
(V8, A9) Optional braking chopper: transistor and its control card SNAT 780 BRC. The braking resistor is outside the
module.
A5 Control Interface Card contains the display, keypad, and terminal block X50 for control wiring. RS485 terminals
X51, X52, and the programming jumpers for analog inputs are on this card.
A4 Motor Control Card SNAT 777 CNT.
(A10, A11) Option cards.