
35
EATON
www.eaton.com
Instruction Booklet
IB020003EN
Effective January 2021
AMPGARD RVSS
Reduced Voltage Soft-Starter
User Manual
Figure 29.
PTC Thermistor from
lower Gate Driver to
Fan-out
From Fan-out for
upper minus SCR on upper Gate
Driver and lower minus SCR on
lower Gate Driver
From Fan-out for
upper plus SCR on upper Gate
Driver and lower plus SCR on
lower Gate Driver
J4 Gate Leads
To upper plus SCR (1+) from
upper Gate Driver
To lower plus SCR (2+) from
lower Gate Driver
J1 Gate Leads
To upper minus SCR (1-)
from upper Gate Driver
To lower minus SCR (2-)
from lower Gate Driver
Current loop from Fan-out J7
will pass through upper and
lower Gate Driver board toroids
and return to J7
J1
PTC Thermistor leads to
lower Gate Driver
White
Red
Red
White
Gate Driver Board 58-9011
Two per phase leg assembly
Six per 400 A Truck
Gate driver board.
Figure 30.
Snubber Board 58-9010
Two per phase leg assembly
Six per 400 A Truck
White
Red
White
Red
Upper
Snubber Board to
Upper Gate Driver Board J1
for minus SCR (1-)
Lower
Snubber Board to
Lower Gate Driver Board J1
for minus SCR (2-)
Upper
Snubber Board to
Short Rear Upper Heat
Sink
Lower
Snubber Board to
Long Heat Sink
Upper
Snubber Board to
Long Heat Sink
Lower
Snubber Board to
Short Rear Lower Heat Sink
Upper
Snubber Board to
Upper Gate Driver Board J1
for plus SCR (1+)
Lower
Snubber Board to
Lower Gate Driver Board J1
for plus SCR (2+)
Snubber board.