Voltage Sag
A voltage sag (also called voltage dip) is a common electrical problem where the power level temporarily drops below normal. Think of it like water pressure suddenly getting weaker when you're showering. In buildings and factories, these power dips can cause equipment to malfunction or shut down. Electrical maintenance workers and technicians are often asked to find, fix, and prevent these issues to keep operations running smoothly. This is different from a complete power outage - it's more like a brief weakening of power that might last just seconds or minutes but can still cause problems for sensitive equipment.
Examples in Resumes
Diagnosed and resolved Voltage Sag issues affecting production equipment
Installed monitoring systems to detect Voltage Sag and Voltage Dip events
Implemented solutions to protect sensitive machinery from Voltage Sag problems
Typical job title: "Electrical Maintenance Technicians"
Also try searching for:
Where to Find Electrical Maintenance Technicians
Professional Organizations
Professional Networks
Example Interview Questions
Senior Level Questions
Q: How would you implement a facility-wide voltage sag monitoring system?
Expected Answer: A senior technician should explain how they would identify critical equipment needs, select appropriate monitoring devices, and set up a system to track and respond to power quality issues across multiple locations.
Q: What preventive measures would you recommend to protect against voltage sags?
Expected Answer: They should discuss solutions like uninterruptible power supplies (UPS), power conditioners, and regular maintenance schedules, explaining these in terms of cost versus benefit for the business.
Mid Level Questions
Q: How do you diagnose the source of a voltage sag problem?
Expected Answer: Should explain the process of checking both internal and external causes, using monitoring equipment, and working with utility companies when needed.
Q: What equipment is most vulnerable to voltage sags and why?
Expected Answer: Should identify sensitive equipment like computers, control systems, and motors, explaining how voltage sags affect their operation in simple terms.
Junior Level Questions
Q: What is a voltage sag and how is it different from a power outage?
Expected Answer: Should be able to explain that a voltage sag is a temporary drop in voltage, not a complete loss of power, and describe basic signs of voltage sags.
Q: What safety procedures should you follow when investigating voltage issues?
Expected Answer: Should demonstrate knowledge of basic electrical safety practices, proper use of testing equipment, and when to call for additional help.
Experience Level Indicators
Junior (0-2 years)
- Basic electrical troubleshooting
- Use of voltage monitoring equipment
- Understanding of electrical safety
- Basic power quality concepts
Mid (2-5 years)
- Advanced troubleshooting techniques
- Installation of power monitoring systems
- Equipment protection solutions
- Preventive maintenance planning
Senior (5+ years)
- Complex system analysis
- Facility-wide power quality management
- Team leadership and project management
- Advanced solution implementation
Red Flags to Watch For
- No knowledge of basic electrical safety procedures
- Unable to use standard voltage measuring equipment
- Lack of understanding about power quality basics
- No experience with industrial electrical systems
Related Terms
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