Shunt Trip Wiring (Optional)
The Express 280 provides a set of unpowered (dry) contacts to connect to an optional shunt trip device.
These contacts are rated to 240 VAC and 6 amps.
Wiring sections to and from the Express 280 are deactivated when unsafe conditions are detected, such as
unintended cover panel removal. A breaker reset is required any time the shunt trip is activated.
If installed, both Express 280 shunt trip should be connected in series on their upstream breakers such that
upstream AC power to both units shuts off upon panel removal to remove shock risk inside the Express
280s. All shunt trip behavior is already hard-coded into the Express 280 and has no programmable
variables.
Emergency stop devices are governed by local and regional codes and may be required in some sites. If
one is required by code or by the site, confirm specifications with your ChargePoint representative.
a. Electrical panel
b. Express 280
c. Control voltage supply, maximum 240 VAC
d. Shunt trip circuit breaker
e. Shunt trip coil
f. Auxiliary contacts (closed when main contacts are closed)
g. 3-phase AC main
h. Express 280 shunt trip contacts, Normally Open (inside the auxiliary power supply, accessible on
field wiring terminal block)
i. 3-phase Express 280 AC input
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