Power-Style™ QED-2 Switchboards Section 5—Pre-energizing Checkout Procedure
38 © 1988–2018 Schneider Electric All Rights Reserved 80043-055-13
ENGLISH
23. Replace all covers and barriers; check for any pinched wires, and close doors.
Make certain all enclosure parts are aligned properly and securely fastened.
Ground Fault Protection Systems
Paragraph 230-95(c) of the National Electrical Code requires that all equipment
ground fault protection systems be tested when first installed. If the circuit breaker
has equipment ground fault protection installed, test it at this time.
1. Make sure the trip unit is powered. The trip unit is powered if any of the
following conditions exist:
— The circuit breaker is closed or bottom fed and has more than 100 V
of load voltage on two phases (P or H trip unit only), or more than 208 V of
load voltage on two phases (Masterpact MTZ circuit breaker).
— The full-function or hand-held test kit is connected and on.
— A 24 Vdc external power supply is connected (Masterpact NW or NT circuit
breakers), or a 5 Vdc power supply is connected to the power port or a PC
is connected to the USB port (Masterpact MTZ circuit breakers).
— An external voltage tap is installed and voltage of more than 100 V is
present on two phases (P or H trip unit only), or more than 208 V is present
on two phases (Masterpact MTZ circuit breaker).
2. If the system is a radial (single-ended) system, press the ground fault
Push-to-Test button. The circuit breaker trips, and the trip unit ground-fault
indicator light comes on.
3. Record results on the ground fault system test log.
NOTE: If a complete check of the ground fault protection system is necessary,
use primary injection testing. If the system is multiple source and/or requires
field connections at the job site, use primary injection testing.
NOTE: Some ground fault protection systems require field connections at the
job site. Consult the switchboard interconnection wiring drawing for details.
NOTIC
CONTAMINATION HAZARD
Do not use an air hose to blow out the switchboard. Dust can settle inside relays
and overcurrent devices, causing overheating and improper operation.
Failure to follow these instructions can result in equipment damage.
To Next Page
Loading...