DC_SWITCH_SPECS.doc

Specifications for one (1) DC FUSED DISCONNECT 4,000A (updated 8/13/2015)

1. Will accept SHOF-500 cables on both the line and load sides of the fused disconnect. All cables connected to the fused disconnect will be SHOF-500’S.

2. SHOF-500 cable connections to the fused disconnect will be Thomas & Betts 600 KMIL (Die Code 94) 2 hole lug. Each connector shall be capable of carrying 600 amps.

3. Will accept a minimum of 12 SHOF-500 cables POSITIVE and 12 SHOF-500 NEGATIVE on the line side of the fused disconnect (24 cables total).

4. Will accept a minimum of 12 SHOF-500 cables POSITIVE and 12 SHOF-500 NEGATIVE on the load side of the fused disconnect (24 cables total).

5. A schematic / wiring diagram of the fused disconnect will be attached to the outside of the cabinet.

6. 4,000A frame with a 500V DC rated insulation system. The 4,000A frame should accept standard fuse sizes. 3,000A will be one of the standard sizes (see 7).

7. The fused disconnect will arrive with 3,000A SLO-BLO fuses installed on both the POS and NEG legs.

8. NEMA rating of the enclosure will be 3R.

9. The enclosure cable entrance and exit point(s) will not prevent the full closure of any door(s) or access cover.

10. The enclosure will be free standing and not require any external means of support to prevent tipping when the all cables are installed. There shall be 1 fused disconnect for 1 enclosure.

11. The enclosure will have a clean, unpainted, identified and easily accessible equipment (frame) ground.

12. The fused disconnect will be capable of being used on an ungrounded DC power system.

13. The fused disconnect will be capable of being moved by both forklift and crane. The weight (lbs.) and dimensions (feet/inches) of each unit shall be clearly marked on the side.

15. The fused disconnect will have a minimum interrupting capability of 100,000A @ 500VDC.