Wiring 3 phase delta units figure 7. There are three different types of surge protective devices.
Two Types Of Spd Connections In A Tt Wiring System
Spd device wiring diagram. This device is connected in parallel on the power supply circuit of the loads that it has to protect see fig. Midnite solar inc. Box after wiring is completed using drywall anchors. Midnite solar surge protection device spd midnite solar inc. Self inductance of wiring is proportional both to its length and to the logarithm of its thickness. J17it can also be used at all levels of the power supply network.
Type 3 spd installed close to the protected load. Type 2 spd installed at sub distribution boards combined type 1 2 spds are available and are usually installed in consumer units. 5 surge protective device for integrated units effective november 2013 figure 6. Page 6 eaton spd series instruction manual im01005019e rev. Device spd install spds on the load side of the main overcurrent protection to comply with nec article 285 for type 2 spd. You must refer to this diagram while wiring the spd.
The surge protection device spd is a component of the electrical installation protection system. Avoid long wire runs so that the device will perform as intended. Wiring single phase units 230 l figure 8. Locate the spd as close as possible to the circuit being surge limited to minimize the wire length and optimize spd performance. Halving the length of connecting wires halves the inductance but the thickness would have to be increased tenfold to achieve the same effect. Warrants to the original customer that the spd products shall be free from defects in materials and workmanship for a period of five 5.
Select the correct wiring diagram for the spd you are install ing. Type 1 spd installed at the origin eg. Spd performance is a function of the connecting lead length. Make sure to grommet the hole in the distribution box. To reduce the impedance.
Gallery of Spd Device Wiring Diagram
