American Power Conversion PMH3XLM Voltage Rating and Service Type, Verify That All Power

**On 4-Wire Power Systems, neutral to ground bonding should be

installed per national and local electrical codes.

Failure to comply may result in damage to the equipment.**

ELECTRICAL CONNECTIONS

Overcurrent Protection

The Surge Protection Device (SPD) draws very little current under normal conditions and will only conduct for a brief duration upon encountering a transient surge voltage. APC SPDs contain internal fusing to protect against abnormal voltage conditions. Note: Fuses are not replaceable.

Voltage Rating

Prior to having the SPD installed, verify that the unit has the correct voltage rating by checking the nameplate voltage or model number. The service type should match the intended power source. See Table 1 for the voltage rating and service type of the SPD.

Table 1: Voltage Rating and Service Type

Model Number

PMH3XLM

Terminals

Voltage Rating and Service Type

220/380 Volts, 3- Phase, WYE

Terminals have been provided inside the APC non-modular SPD for line (phase), neutral, and equipment safety ground connections. Terminal wire size range for all models is #8 AWG. Installation torque is 65 inch-pounds.

!	WARNING	VERIFY THAT ALL POWER
		CIRCUITS ARE DE-ENERGIZED
		BEFORE MAKING CONNECTIONS

All electrical connections should be performed by a qualified/licensed electrician. All wiring

must comply with national and applicable local codes.

Parallel Connection

When making a parallel type of connection (Figure 2), the length of the wiring to the Surge Protection Device (SPD) must be kept as short as possible to substantially enhance the performance. Long wire runs are to be avoided for the unit to perform as intended.

To reduce the impedance the wire displays to surge currents, the phase, neutral, and ground conductors are to be routed within the same conduit and should be tightly bundled or twisted together to optimize performance of the unit. Sharp bends in the conductors are to be avoided.

Wire Size

With a parallel connection, the size of the wiring to the SPD is independent of the ampere rating of the circuit to be protected. The recommended wire size is based on the unit’s transient surge current capabilities. #8 AWG is the recommended wire size for phase, neutral, and ground.

**Surge Protection Devices are designed for use on the load side

of the service entrance disconnect only**

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