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4 Electrical Installation
4.1 Electrical Installation Guidelines
Be sure to reference Appendix E Engineering Drawing 613-816, Service Connections
during this procedure.
4.1.1
Conduit/Connections
Power and signal wires are fed through the 3/4 inch NPT conduit holes in the side of the
housing. All wires exiting the enclosure must run through properly installed explosion-proof
packing gland fittings to maintain the explosion-proof rating. Only a qualified service person
should perform operations on this instrument.
Warning: The seal fittings must be located NO GREATER than 18 inches (457mm)
from the instrument enclosure to maintain the explosion proof rating.
For
II 2 G, EEx d IIB T4 applications, this seal must be directly at the enclosure
entry.
LumaSense does not provide the explosion-proof packing gland fittings required for
installations since client standards vary as to the brand or type of explosion-proof packing gland
fittings required for installations. Additionally, states and countries have different standards,
making it very difficult for LumaSense to stock the proper fittings.
Flexible conduit of sufficient length must be used from the housing explosion-proof packing
gland fittings to the hard conduit or junction box to enable movement of the unit on the
pedestal.
All power and signal connections are made on the Terminal Output board mounted on the
infrared electro-optical package inside the explosion-proof enclosure. Power is connected to
terminal block TB1. Output signals are connected to terminal block TB2.
See Chapter 10.2, Electrical Service Protection, for more information.
4.1.2
Over-Current Protection/Service Switch
It is necessary to incorporate an external over-current protection device appropriate to the
instrument's service and to include a disconnect switch located near the instrument. The service
disconnect should be clearly marked as pertaining to this instrument.
4.2 Power Connections
Connect the input power as described in this chapter. Confirm service type and check that the
instrument service markings correspond to expectations. When wiring, follow local code
regulations. Secure power input conductors together after connection to terminal block to
prevent an accidental hazardous live condition in the event a terminal screw becomes loose.
Sleeve or tie wrapping is acceptable. Check to ensure power is not accidentally connected to the
low voltage I/O terminal block TB2.
4.2.1
Service Markings
Input Power service (i.e.120VAC, 220VAC, 24VDC) and Fusing type are factory set and marked on
the Terminal Output PCB (See Figure 7).
E
T QUASAR Flare Monitors Operation Manual
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Electrical Installation • 23
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