Emerson AMPGARD RVSS Instruction Booklet page 35

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