Live Line & Substation Safety

About Live Line & Substation Safety

The philosophy of Live Line Working has existed for many years. It is a practice adopted not only by Distribution Network Operators (DNOs) within the UK but worldwide in countries such as the USA, Canada, Japan, and many other countries throughout Europe.

Distribution Network Operator customers, both domestic and commercial, have derived considerable and to some extent immeasurable benefits from Live Working through the avoidance of costly and disruptive interruptions to their supplies.

• Live Line Testers - testing of high voltage overhead AC lines and switchgear with an insulated pole attached to an indicator
• Phase Comparators / Phasing Sticks - generally large in construction but lightweight enough to be moved between a variety of test points during a technician's day
• High Voltage Indicators & Detectors - determine the presence or absence of an electrical charge in an object
• High Current Ammeters - detect problems in electrical circuits - unusually high or low levels of current, for example
• Live Line Tester Accessories - over 40 accessories to bolster your efficiency when live line testing
• Operating Rods & Poles (Hot Sticks) - one of the most-used tools in a line technician's toolbox
• Operating Rod Accessories - choose from a selection of products to enhance your operating rod
• High Voltage Rescue Sticks & Kits - a range of insulated rescue sticks, kits, and poles
• High Voltage Proximity & Personal Detectors - alert the user to the presence of high voltage
• Earthing Clamps - secure connection between the energiser and earthing system for optimum electrical conductivity
• Earthing Systems - defines the electrical potential of the conductors relative to that of the Earth's conductive surface
• Short Circuit Systems - earthing and short-circuiting devices are essential components for ensuring user safety

Popular Products

• Metrohm LLT-33kV High Voltage Live Line Tester - Full Kit: Crucial for safety in high voltage environments, testing up to 33kV. It includes a measuring rod, phasing rod, extension rods, and adaptors for versatility in overhead lines and substations. With reliable voltage detection and a complete kit featuring a proving unit, earthing lead, cleaning kit, and carry case, it's an essential tool for electrical professionals.

• Seaward PR11 HV Neon Phasing Unit: Dual-probe phasing stick for earthed neutral circuits up to 11.5kV. It allows accurate phase comparison without voltage transformers, featuring neon indicators in a shock-resistant sleeve for clear phase confirmation.

• HD Electric DigiVolt-25T Single-Stick Voltmeter: Measures voltages from 50V to 25kV in overhead and underground systems. It features a capacitive test point mode for precise phasing, a large backlit LCD, and includes a ground lead with universal splines for hot stick attachment. Capable of measuring both AC and DC voltages, it has robust construction, auto shut-off, and a low battery indicator.

• Seaward KD1E/33 Neon HV Potential Indicator: Portable device for earthed neutral systems up to 33kV. It offers clear voltage confirmation with neon indicators and features durable PVC construction and encapsulated resistors.

• Metrohm HVI-F0357A High Voltage Indicator Kit: Detects voltages from 0.2kV to 15kV AC/DC. It includes a high voltage indicator, proving unit, earth lead, cleaning kit, instruction manual, and carry satchel. The indicator uses flashing neon lights to signal voltage presence, with the flash rate increasing with voltage, stabilizing at 6.35kV.

• HD Electric HVA-2000 High Voltage Digital Ammeter: Measures AC in systems up to 500kV, with true-RMS readings up to 2000A. It features a bright LED for easy visibility on long hot sticks, dual hot stick connections for versatility, and can store the last four readings for efficiency.

• T & R DP Series Discharge Probe: Essential for safely discharging high-voltage cables after testing. Available in 5kV, 20kV, and 40kV models, each features a pointed probe connected to an earth lead with surge resistors for controlled discharge. The insulated handle and clear silicone earth lead allow easy conductor inspection. The DP5 handles up to 5kV (0.9kJ), the DP20 up to 20kV (3.6kJ), and the DP40 up to 40kV (7.2kJ).

• Sofamel BMAI Connectable Pole: Versatile tool for high voltage operations, available in 2m, 2.5m, and 3m lengths that can be connected for extended reach. Rated for up to 132kV, these lightweight and durable poles feature customizable heads for various tasks, such as operating switches or overhead maintenance.

• CATU CM-4410 Terminal Element Pole: A highly adaptable instrument for high voltage applications, featuring customizable configurations with an array of end fittings. Constructed from lightweight, durable materials, it facilitates effortless handling while ensuring consistent and reliable performance.

• CATU CS-45 High Voltage Rescue Pole: An indispensable safety instrument for emergencies involving high voltage systems, the CATU CS-45 High Voltage Rescue Pole measures 1.65 metres in length and is expertly insulated to safeguard against voltages up to 45kV. Its design incorporates a large hook, facilitating the safe retrieval of individuals who may be in contact with live electrical components.

• TestSafe TS-HV11 High Voltage Personal Detector: A safety device for individuals operating in high voltage environments, this compact and portable detector provides vital alerts to the presence of high voltage electrical fields, serving as an early warning mechanism to prevent accidental contact. Its robust design enables the detection of voltages from a safe distance, thereby assisting in maintaining a secure perimeter around hazardous areas.

• CATU MT-814/2 Rotating Clamp: With its innovative rotating mechanism, the CATU MT-814/2 enhances electrical maintenance and safety by allowing for effortless manoeuvrability and precise alignment on conductors. This clamp is meticulously engineered for resilience in high-voltage environments, making it an ideal choice for essential grounding and testing tasks.

• CATU MT-508/36 3 Element Telescopic Earthing Kit: A comprehensive solution for safety during electrical maintenance and grounding operations. It features three extendable elements that provide secure connections to the ground. Its telescopic design ensures easy storage and transport, while high-quality materials guarantee durability in harsh environments.

• Sofamel PAT-AL-TML Earthing & Short-Circuit Equipment: A game-changer for electrical workers in maintenance and emergencies. It actively eliminates residual and induced voltages, effectively preventing accidental electric shocks. With its robust earthing cables and clamps, this set guarantees secure ground connections, delivering dependable performance even in the toughest conditions.

FAQs

• What are the essential personal protective equipment (PPE) for substation safety?
  Substation safety requires essential PPE like hard hats, safety glasses, face shields, dielectric footwear, and insulated gloves and tools. Electrical blankets and hot sticks are also vital for the safe handling of live equipment. Proper PPE use and training are crucial for effective protection against electrical hazards.

• What are the dangers of working in a substation?
  Working in substations involves risks such as electrical shock, electrocution, and arc flashes, which can cause severe injuries or death. Fires, explosions, falls, and exposure to hazardous substances are also significant dangers. Mechanical hazards, confined spaces, high noise levels, and ergonomic issues add to the risks. Strict safety protocols, appropriate PPE, thorough training, and regular equipment maintenance are essential for a safe working environment.

• What are the best practices for securing the perimeter of a substation?
  Securing substation perimeters involves crash-rated fencing, anti-climb walls, high-security gates, and intrusion detection systems. Regular risk assessments and a defence-in-depth approach with layered security measures are essential. Proper training and coordination among security personnel help maintain safety and integrity.

• What is the importance of arc flash protection in substations?
  Arc flash protection is essential in substations due to the severe risks, including burns, blindness, and equipment damage. Using arc-rated PPE, maintaining safe distances, and employing insulated tools are crucial for safety. Regular training and strict safety protocols further reduce the risk of arc flash incidents.

• How to handle and operate vehicles safely in substations?
  Safe vehicle operation in substations requires trained operators, pre-operation inspections, adherence to designated paths and speed limits, and clear communication with ground workers. Vehicles should have warning lights, use parking brakes, and be parked away from high-voltage areas. Regular maintenance further ensures safety and reduces accident risks.

• How to ensure proper grounding in substations?
  Proper grounding in substations is crucial for safety and reliability. It protects against electrical shocks and equipment damage. A comprehensive grounding system with rods, grids, and conductors provides a low-resistance path to earth. Regular inspections, bonding of all metallic parts, and clear record-keeping are essential. Training personnel on grounding principles further ensures safety and reliability.

• How can live line work be performed safely?
  Safe live line work requires thorough training, specialized PPE like insulating gloves and dielectric footwear, and insulated tools such as hot sticks. Workers must maintain safe distances, use barriers, and regularly inspect equipment. Effective communication and conducting a job safety analysis (JSA) are essential to identify hazards and implement controls, minimizing the risk of accidents.

• Can live line work be performed in all weather conditions?
  Live line work is unsafe in adverse weather due to increased risks like lightning, slippery surfaces, and equipment malfunctions. Extreme temperatures can also affect safety. Monitoring weather conditions and suspending work when necessary are essential to protect workers.