Service Clearance
In addition to national and local code requirements, 36 inches of service clearance is needed at the front of the SPD.
Equipment Performance
To obtain the maximum system performance, the unit must be located as close to the circuit to be protected as possible, minimizing the interconnecting wire length. For every foot of wire length, approximately one (1) nanosecond of
For optimum transient surge protection, staged surge suppression should be implemented at the service entrance and all other electrical connections to the building (telephone, CATV, etc.). It should also be implemented at recognized surge generating loads within the building (arc welding rigs, large motors, switched capacitors, etc.). Additionally, it should be implemented for sensitive electronic loads (computer equipment, facsimile machines, copy machines, solid state motor drives, variable frequency drives, etc.). For interconnected electronic loads (via data cabling), surge protective devices should also be utilized to protect the devices on either end of interconnecting data cables.
APC Manufactures a complete line of surge protection devices for both alternating current (AC) and direct current (DC) applications. Contact an authorized APC reseller, or order directly from, APC at www.apc.com.
Product Orientation
To decode the Model Number and determine the unit’s configuration, locate the printed nameplate on the top of the unit. Note: The Serial Number, Date of Manufacture, and UL 1449 Suppression Voltage Rating (SVR) are also on the unit identi- fication nameplate. The Model Number can be decoded as follows:
•PM identifies a SurgeArrest Panel Mount product. The following letter indicates the voltage and wiring configuration of the device.
•Following the alpha character is the number 3, 4, or 4Y. 3 and 4 indicate SurgeArrest Panel Mount units with one replaceable module per phase, rated at 120kA or 160kA respectively. 4Y indicates a SurgeArrest Panel Mount unit with 2 replaceable modules per phase, rated at 160kA per phase.
•Following the letter designation is optional equipment, shown as: /AA = Audible Alarm, /DC = Dry Contact, /IL = Indicator Lights, /DS = Disconnect Switch, DL =
Options are detailed later in this manual.
VERIFY THAT ALL POWER
! WARNING CIRCUITS ARE
BEFORE MAKING CONNECTIONS
All electrical connections should be performed by a qualified (licensed) electrician.
All wiring must comply with the National Electric Code (NEC) and applicable local codes.
ELECTRICAL CONNECTIONS
Overcurrent Protection
The Surge Protective Device (SPD) draws very little current under normal conditions and will only conduct for a brief duration upon encountering a transient surge voltage. APC SPD’s contain UL Listed internal fusing to protect against abnormal voltage conditions. Note: Fuses are not replaceable.
Voltage Rating
Prior to mounting the SPD, 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 2 for the voltage rating and service type of the SPD.
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