nvent SES320 Series Instruction Sheet

INSTRUCTION SHEET
SES320 Series
Surge Protective Device

WARNINGS

• Safety First - Hazardous Voltage & Shock Hazard
• Only qualified licensed electricians should install or service SPDs
• Hazardous voltages exist within SPDs
• SPDs should never be installed or serviced when energized
• Use appropriate safety precautions including Personal Protection Equipment
• Failure to follow these instructions can result in death, serious injury, and/or equipment damage
• This manual shall be read in its entirety prior to installing
Bonding and Grounding Hazard
Verify that the neutral conductor in the service entrance equipment is bonded to ground in
accordance with the National Electric Code (NEC®) and all applicable codes. During installation into an
electrical system the panel must not be energized; or the Circuit Breaker de-energized, until the SPD
is completely installed, inspected and tested. All conductors must be connected and functional
including the neutral (if required).
The voltage rating of the SPD and system must be verified before energizing the SPD. Failure to
follow these guidelines can lead to abnormally high voltages at the SPD. This may cause the SPD
to fail. The warranty is voided if the SPD is incorrectly installed and/or if the neutral conductor in the
service entrance equipment or downstream of separately derived systems is not bonded to ground in
accordance with the NEC®
Do Not Hi-Pot Test SPDs
Any factory or on-site testing of power distribution equipment that exceeds normal operating voltage
such as high-potential insulation testing, or any other tests where the suppression components will
be subjected to higher voltage than their rated Maximum Continuous Operating Voltage (MCOV)
must be conducted with the SPD disconnected from the power source. For 4-wire systems, the
neutral connection at the SPD must also be disconnected prior to performing high-potential testing.
Failure to disconnect SPD and associated components during elevated voltage testing will damage the
SPD and will void the warranty.
SPDs on Ungrounded Systems
Caution - Ungrounded systems are inherently unstable and can produce excessively high line-to
ground voltages during certain fault conditions. During these fault conditions, any electrical
equipment including an SPD may be subjected to voltages which exceed their designed ratings. An
SPD designed specifically for Ungrounded systems should be used.
WARNING:
1. nVent products shall be installed and used only as indicated in nVent product instruction sheets and training materials. Instruction sheets are available at
www.nVent.com and from your nVent customer service representative.
2. nVent products must never be used for a purpose other than the purpose for which they were designed or in a manner that exceeds specified load ratings.
3. All instructions must be completely followed to ensure proper and safe installation and performance.
4. Improper installation, misuse, misapplication or other failure to completely follow nVent's instructions and warnings may cause product malfunction, property
damage, serious bodily injury and/or death, and void your warranty.
SAFETY INSTRUCTIONS:
All governing codes and regulations and those required by the job site must be observed.
Always use appropriate safety equipment such as eye protection, hard hat, and gloves as appropriate to the application.
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