Table 2. Ampgard Rvss Ratings And Specifications - Emerson AMPGARD RVSS Instruction Booklet

Instruction Booklet IB020003EN
Effective January 2021
Table 2. AMPGARD RVSS Ratings and Specifications
Type of Load
Voltage
Horsepower
SCR/Contactor ampere rating (UL347 rating)
SCR peak inverse voltage
Overload Rating (% motor FLA)
Line Frequency
Short-circuit withstand-interruption rating
BIL Ratings
Transient Voltage Protection
Design Ambient Rating
Control Power
Acceleration Control
Deceleration control
Motor and starter protection
Statistical data
Metering (voltage, current, power,
temperature, line frequency)
Commissioning software
Communications
Approvals
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 Figure 17).
A low voltage control compartment is located on the front of the
upper cell medium voltage door. (See Figure 16 and Figure 18).
Refer to IB48041 (Instructions for AMPGARD 400 Ampere Medium
Voltage Starter) for operating and maintenance instructions on the
upper cell.
See Section 6 for details on the Upper Cell.
12
EATON www.eaton.com
Three-phase medium-voltage ac induction or synchronous motors
2300 3300 up to 4800
1500 1800 2500
360 360 360
13,000 13,000 13,000
AC-53b (600-30-60m) (500% 60 sec; 600% 30 sec)
50 or 60 Hz, selectable, tolerance +10-5%
50 kA
60 KV (2300 V to 4160 V output) with lightning arresters
RC snubbers on SCR power-pole
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)
120 VAC single phase, 24VDC and 48VDC internal (supplied)
Voltage ramp with current limit, pump start, current ramp, kick start, jog, undervoltage sag limit ramp
Coast stop, linear voltage deceleration ramp
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).
Fault log up to 10 events (data includes date and time)
Elapsed run time, last start time, average starting current
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
Power Xpert in Control programming software, user manual MN040013EN.pdf, user manual IB020003EN.pdf
RS-485 with Modbus® RTU protocol, Ethernet Modbus/TCP, EtherNet/IP
UL recognized
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 Figure 17.
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 Figure
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 Figure 21).
1.3.3
1.3.3.1
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
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
Reduced Voltage Soft-Starter
AMPGARD RVSS control
Control power
AMPGARD RVSS Truck
AMPGARD RVSS
User Manual
20).