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Ideally, every electrical panel should
be surge protected. However, this
may not be practical or feasible.
Proven surge protection practices
do not have to be complicated or
costly. All you need to do is
address the following:
1- Where should hard wired
SPDs be installed on the
electrical system?
2- What size and type SPD
should be used?
Surge Protecting a Water Treatment Plant
Service Entrance
Applying surge protection at the incoming electrical service “Stops Surges Before They Get In.” These types of surges contain the largest surge energy warranting 300 kA or more of surge current redundancy.
Products
External SPD

TEXAS30E1
Increased Redundancy
TEXAS45E1

External - 10 Mode

TEXAL30E1
Increased Redundancy
TEXAL45E1
Outside Loads
SPDs should be installed at distribution panels feeding remote circular clarifiers, remote storage, etc. to prevent back feeding surges entering the main plant.
 
External SPD

TEXAS20E1
Increased Redundancy
TEXAS30E1

External - 10 Mode

TEXAL30E1
Increased Redundancy
TEXAL30E1
Lower Voltage Panels
If the plant is supplied with a higher system voltage (i.e. a 277/480V service), 120V panels need SPDs to condition residual surges leaving the service entrance SPD as well as any internally generated surges. Examples could be panels powering dry polymer feed systems, odor control systems, or any other panels powering sensitive electronic-rich rooms.
 
External SPD

TEXCS104X
Increased Redundancy
TEXDS154X

External - 10 Mode

TEXAL15E1
Increased Redundancy
TEXAL30E1
Individual Equipment
Even if surge protection is applied at the previous locations, redundant protection maybe warranted for sensitive, costly equipment. This may include pump and process controllers.
 
External SPD

S50A
Increased Redundancy
TEXCS104X

Data Lines
Security, fire alarm, and telephone systems using copper communications lines need protection especially for telemetry and SCADA circuits running between locations across the plant.
 
External SPD


S50A



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