Rockwell Automation SB3000 High Pwr SB3000 AC Pwr Modules (RCS) - Manual (Page 9)

Introduction 1-1
C
HAPTER
1
Introduction
The High Power SB3000 Power Modules are variable-voltage, limited-frequency, high
performance PWM power converters. They are designed to be used with Distributed
Power System (DPS) SA3000 and SA3100 PWM inverter drives and other high
performance PWM-type inverters that operate from a fixed voltage DC Bus input.
The SB3000 Power Modules operate as two-quadrant, fast-response, synchronous
rectifiers converting fixed-frequency AC power to regulated voltage DC power using
pulse-width-modulation (PWM) technology. They can operate in both the motoring and
regeneration modes in response to the load applied to the DC output. SB3000 Power
Modules are capable of full rating regeneration of power to the AC line and feature
adjustable power factor operation.
The SB3000 Power Modules operate in conjunction with a separately-mounted input
reactor and a separately-supplied power distribution cabinet, which provides AC
power protection, disconnect, and soft-charge functionality for the SB3000 Power
Modules. Refer to Appendixes B and C for more information on SB3000 theory of
operation and interlock sequencing.
The SB3000 Power Modules are configured in three output power ratings: 445 amp,
890 amp, and 1335 amp when used at a 4 kHz carrier frequency. They have a range
of AC Input voltage ratings. See table 1.1. Nominal DC bus voltage may range from
300 to 800 VDC.
Output current with a 2 kHz carrier frequency is 534A, 972A, and 1457A. A 4 kHz
carrier frequency is typically used to minimize the size of the AC line reactor. The
4 kHz operation requires a derating of the AC input current and DC output load current
when compared with operation at 2 kHz.
The SB3000 Power Module output current ratings given are 100% continuous with no
overload. They may be derated for lower current ratings with overload capability.
Table 1.1 – SB3000 Power Module Configurations
Base Part
Number
Cabinet
Type
Output
DC Bus
Volts
Output
Amps
(2 KHz)
Output
Amps
1
(4 KHz)
Peak
Amps
2
AC Input
Volts
850021-21xxx
850021-31xxx
One Bay 250-820V
3 534A 445A 700A 208-460V
850021-22xxx
850021-32xxx
Two Bays 250-820V 972A 890A 1275A 208-460V
850021-23xxx
850021-33xxx
Three Bays 250-820V 1457A 1335A 1900A 208-460V
1. Output current ratings at 40° C (104° F) ambient air temperature and 60 Hz. Reduce all output current ratings by 5% when the Power
Module blowers are operated from a 50 Hz power source.
2. Contact Rockwell Automation for duty cycle ratings.
3. 800 VDC if an SA3000/SA3100 unit is used to supply 575 VAC output to the motor.