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Inspection Detail
Inspection: 125881599 - Southern California Edison
Inspection Information - Office: San Bernardino District Office
Site Address:
Southern California Edison
John F Kennedy Dr & Kitching St
Moreno Valley, CA 92388
Mailing Address:
14660 Chestnut Ave, Westminister, CA 92683
Union Status: Union
SIC:4911
NAICS: 221122/Electric Power Distribution
Inspection Type: Accident
Scope: Partial
Advanced Notice: N
Ownership: Private
Safety/Health: Safety
Close Conference: 02/05/2007
Emphasis:
Case Closed: 04/26/2011
| Type | Activity Nr | Safety | Health |
|---|---|---|---|
| Accident | 102491065 |
| Violations/Penalties | Serious | Willful | Repeat | Other | Unclass | Total |
|---|---|---|---|---|---|---|
| Initial Violations | 2 | 2 | ||||
| Current Violations | 2 | 2 | ||||
| Initial Penalty | $0 | $0 | $0 | $1,700 | $0 | $1,700 |
| Current Penalty | $0 | $0 | $0 | $300 | $0 | $300 |
| FTA Penalty | $0 | $0 | $0 | $0 | $0 | $0 |
| # | Citation ID | Citaton Type | Standard Cited | Issuance Date | Abatement Due Date | Current Penalty | Initial Penalty | FTA Penalty | Contest | Latest Event | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 01001 | Other | 29400002 A | 02/21/2007 | 03/05/2007 | $300 | $850 | $0 | 02/22/2007 | F - Formal Settlement | |
| 2. | 01002 | Other | 2944 H01 C | 02/21/2007 | 03/05/2007 | $0 | $850 | $0 | 02/22/2007 | F - Formal Settlement |
Investigation Summary
At approximately 10:48 a.m. on September 16, 2006, two employees of a utility company, Employee #1 and a coworker, were performing maintenance work (i.e., a clearing procedure) on a 12 kilovolt (kV) vacuum circuit breaker (Square D, Type FVR, 12 kV, identified as Circuit Breaker Number 5). Three load disconnect switches and three line disconnect switches were used to isolate the circuit breaker from all sources of potential energy. The disconnect switches were underhung-mounted type (Southern States, 14.4 kV, 3500 Amp, 80 kiloamp "MOM Rating"). Each disconnect switch had two blades, and each blade had a hookstick eye (pull ring), where the blades were opened and closed, one at a time. Employee #1 and his coworker opened the load and the line switch disconnects and connected a laptop computer to the breaker. The coworker walked to the control room to "shoot the breaker" (i.e., conduct Response Time Recording), while Employee #1 stood by the circuit breaker and the laptop. After the coworker shot the circuit breaker, he walked to his truck to obtain some paperwork, and that is when the circuit breaker exploded. Employee #1 sustained serious injuries to his face, neck and right arm, as a result of the electrical blast. Employee #1 was transported to Arrowhead Regional Medical Center, where he was hospitalized for two days, and was then transferred to Grossman Burn Center at 7:20 a.m. on September 18, 2006. Shortly after the blast, it was discovered that one of the blades on the "B" phase of the line side was inadvertently left in the "closed" position, rendering the line side of the circuit breaker energized. It was further discovered that the high-voltage cover on the circuit breaker was removed and that the personal grounds were connected to the station ground grid but not to the circuit breaker.
Keywords: BURN, ELECTRIC ARC, COVER, ELECTRICAL, ELECTRICAL TESTING, LOCKOUT, CIRCUIT BREAKER, EQUIPMENT GROUNDING, ELEC UTILITY WORK, ELECTRICAL FAULT
| # | Inspection | Age | Sex | Degree of Injury | Nature of Injury | Occupation |
|---|---|---|---|---|---|---|
| 1 | 125881599 | Hospitalized injury | Other | Supervisors; electricians & power transm. install. |