Eaton SPD Series for Mounting External to Electrical Distribution Equipment Installation Manual IM01005031E—Rev 09 3
For example, a 480 volt delta (3-wire plus ground) for use in an MCC application requires an SPD model SPD
250480D2J, where:
SPD = SPD model,
250 = the kA rating (50 – 400 kA),
480D = the voltage,
2 = the feature package (Basic, Standard, Standard with Surge Counter, or Power Xpert SPD),
J = the application suffix (such as direct bus mounted in a panelboard or connected through a circuit breaker).
These numbers also appear as part of the product label attached to the front left side of the SPD. See Figure 2.
FFiigguurree 22.. PPrroodduucctt LLaabbeell
11..66 EEqquuiippmmeenntt TTeessttiinngg
Conducting dielectric, Meggar, or Hi-potential testing with the SPD installed will cause internal damage to the
SPD. The SPD will cause the test to fail.
Every Eaton SPD Series unit is tested at the factory for dielectric breakdown. No further SPD testing is required
for installation.
If you desire to test distribution equipment by performing dielectric, megger, or hi-potential tests, any installed
SPD mmuusstt be disconnected from the power distribution system to prevent damage to the unit.
For SPDs connected to a circuit breaker or fuse:
• FFoorr 33--wwiirree ddeellttaa SSPPDDss: Turn off the circuit breaker or remove the fuses from the fuse holder to isolate the
SPD.
• FFoorr wwyyee aanndd sspplliitt pphhaassee SSPPDDss: Turn off the circuit breaker or remove the fuses from the fuse holder to
isolate the SPD and remove the neutral connection on wye connected SPDs.
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