APC PMH3XS-B ユーザーズマニュアル

Terminals are provided for phase (line), neutral, and equipment ground 
connections. The SPD terminals accept a range of 12 AWG (3 mm

2

) to 2 AWG 

(34 mm

2

) copper wire for phase, neutral, and ground connectors. Torque 

connections to the following values.

A branch circuit Overcurrent Protection Device (OCPD) either in the form of a 
circuit breaker or fuse, must be provided for the SPD. The branch circuit OCPD 
should either provide or include a disconnecting means.

Since the current drawn by the SPD during standby operation is negligible, the 
SPD can be connected to a dedicated, separate branch circuit or connected to 
a suitable existing branch circuit.

•

When connected to a separate, dedicated branch circuit, the OCPD 
setting must be selected to protect the conductors feeding the SPD.

•

When connected to an existing branch circuit, the conductors connected 
to the SPD must have an ampacity not less than the setting of the 
existing OCPD. Refer to Terminals, Wire Size, and Installation Torque 
section above, for the maximum conductor cross-section that can be 
connected to the SPD.

During overvoltage surge diversion, current will flow through the SPD. The 
branch circuit OCPD must pass this current without tripping for the SPD to 
function properly.

For further information concerning coordination of the OCPD with the SPD, 
refer to the Caution statement “Loss of Branch Circuit Power/Loss of Surge 
Suppression” on page 4.

AØ, BØ, CØ and N

35 lb-in. (4 N•m)

Ground

• Use conductors rated for the Overcurrent Protection Device (OCPD) per 

applicable codes.

• Use conductors rated for the application per applicable codes.