12
EATON
www.eaton.com
Instruction Booklet
IB020003EN
Effective January 2021
AMPGARD RVSS
Reduced Voltage Soft-Starter
User Manual
Table 2. AMPGARD RVSS Ratings and Specifications
Type of Load
Three-phase medium-voltage ac induction or synchronous motors
Voltage
2300
3300
up to 4800
Horsepower
1500
1800
2500
SCR/Contactor ampere rating (UL347 rating)
360
360
360
SCR peak inverse voltage
13,000
13,000
13,000
Overload Rating (% motor FLA)
AC-53b (600-30-60m) (500% 60 sec; 600% 30 sec)
Line Frequency
50 or 60 Hz, selectable, tol10-5%
Short-circuit withstand-interruption rating
50 kA
BIL Ratings
60 KV (2300 V to 4160 V output) with lightning arresters
Transient Voltage Protection
RC snubbers on SCR power-pole
Design Ambient Rating
0–50 ºC (82 ºF to 122 ºF) (optional –20 ºC to +50 ºC with heaters), 5–95% relative humidity
0–3300 ft (1000 m above sea level without derating)
Control Power
120 VAC single phase, 24VDC and 48VDC internal (supplied)
Acceleration Control
Voltage ramp with current limit, pump start, current ramp, kick start, jog, undervoltage sag limit ramp
Deceleration control
Coast stop, linear voltage deceleration ramp
Motor and starter protection
E-Stop (1), Truck Instantaneous Overcurrent (50/51), Motor Jam (50/51, Pre-start Check Fault, Overload (49),
Incomplete Sequence (48), RVSS Overtemperature (23), Starts Limit Exceeded (66), Undervoltage (77), Overvoltage
(59), Overfrequency (81), Underfrequency (81), Phase Rotation Mismatch (46, 47), Main Contactor Failed to Close
(4/39), Bypass Contactor Failed to Close (4/39), No Ramp Type Selected (34), Motor Instantaneous Overcurrent
(50/51).
Statistical data
Fault log up to 10 events (data includes date and time)
Elapsed run time, last start time, average starting current
Metering (voltage, current, power,
temperature, line frequency)
Average current, percent of FLA, current unbalance, Ground fault (optional), phase currents, average voltage, voltage
unbalance, line to line voltages, phase order, power (VA), power (VARs), power (Watts), power factor, motor heating
as percent of thermal capacity, SCR heat sinks’ PTC status, line frequency
Commissioning software
Power Xpert
in
Control programming software, user manual MN040013EN.pdf, user manual IB020003EN.pdf
Communications
RS-485 with Modbus® RTU protocol, Ethernet Modbus/TCP, EtherNet/IP
Approvals
UL recognized
1.3.2 AMPGARD RVSS enclosure
An AMPGARD 400 Amp RVSS soft-starter unit consists of a
standard AMPGARD structure that is 36 inches wide by 30 inches
deep by 92 inches tall, including the main bus. The unit includes
top-mounted horizontal bus for integration into an AMPGARD lineup
if desired. The unit top half is referred to as the upper cell and the
bottom half as the lower cell. If the starter is not to be part of an
AMPGARD lineup, a transition compartment will likely be included,
to provide a transition from incoming cables to the horizontal
through bus.
1.3.2.1
Upper Cell
The upper cell consists of a full voltage starter with a non-load
break isolation switch, medium voltage current limiting fuses,
an AMPGARD SL three-pole vacuum contactor, control power
transformer, potential transformer, and output phase current
transformers. A bus connection feeds power from the upper cell
contactor to the SCR truck in the lower cell (see
.
A low voltage control compartment is located on the front of the
upper cell medium voltage door. (See
and
Refer to
(Instructions for AMPGARD 400 Ampere Medium
Voltage Starter) for operating and maintenance instructions on the
upper cell.
See
for details on the Upper Cell.
1.3.2.2 Lower Cell
The lower cell consists of a welded frame with rails for the
AMPGARD RVSS truck assembly. There is a medium voltage door
with a flange that prevents access to the lower cell until the isolation
switch and upper door have been opened, to ensure that line voltage
is not present. The RVSS truck assembly is shown racked into place
in
.
A second low voltage compartment is located on the lower cell front
door. The keypad operator interface (Monitoring User Interface) is
located on the front of the low voltage door and is used to configure
the Soft-Starter control system (See
.
The control system for the AMPGARD RVSS is located in this
low voltage compartment. Components include the Base Control
Module, Monitoring User Interface, I/O Board, 24 VDC and 48 VDC
power supplies, relays and current RFI filter. (See
).
1.3.3 AMPGARD RVSS control
1.3.3.1
Control power
Control power for the AMPGARD RVSS Soft Starter comes
from the control power transformer in the upper cell. The CPT
receives primary voltage from the line and provides 120 VAC to
the control system. In addition to the relay and sequencing loads,
the CPT powers two DC power supplies. 24 VDC powers the
control electronics, and 48 VDC powers the SCR Truck gate firing
electronics.
1.3.3.2
AMPGARD RVSS Truck
The AMPGARD RVSS Power Poles containing the power SCRs,
heat sinks, gate driver and snubber boards and other electronics are
mounted on an easy to remove, roll out truck assembly. A second