Fusing

DOE-HDBK-1092-2004

4. The grounding hooks should be left on all of these low-impedance points during the time of

safe access.

5. The low-impedance points shall be provided whether or not the HI-Z current-limiting points

are needed.

6. Voltage indicators that are visible from all normal entry points should be provided.

10.10.1.2.5 FUSING

1. Capacitors connected in parallel should be individually fused, when possible.

2. Caution must be used in the placement of automatic discharge safety devices with respect

to fuses. If the discharge will flow through the fuses, a prominent warning sign should be

placed at each entry indicating that each capacitor must be manually grounded before work

can begin.

3. Special knowledge is required for high-voltage and high-energy fusing.

10.10.1.3

OPERATION AND MAINTENANCE

1. The protective devices (interlocks) shall not be bypassed unless by qualified electrical

personnel when inspecting, adjusting, or working on the equipment. Proper procedures

need to be followed when bypassing interlocks.

2. Procedures should be established for tagging the interlock and logging its location and

the time when bypassed and restored. Written approval shall be obtained from an

appropriate authority before bypassing an interlock .

3. Only qualified electrical personnel (those trained in the proper handling and storage of

power capacitors and hazard recognition) shall be assigned the task of

servicing/installing such units.

4. Proper PPE shall be used when working with capacitors.

5. Access to capacitor areas shall be restricted until all capacitors have been discharged,

shorted, and grounded.

6. Any residual charge from capacitors shall be removed by grounding the terminals before

servicing or removal.

7. Automatic discharge and grounding devices should not be relied upon.

8. Grounding hooks shall be inspected before each use.

9. Capacitor cases should be considered "charged."

10. Protective devices should be tested periodically.

11. All uninstalled capacitors capable of storing 5 joules or greater shall be short-circuited

with a conductor no smaller than #14 AWG.

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