Arc Flash Advisors Ltd. services

An electrical safety audit is a systematic procedure to evaluate potential electrical hazards, and to recommend measures to minimise/prevent these hazards (i.e. electrical shocks, electrical arcs, and electrical blasts). An electrical safety audit is a loss prevention program - property/production loss (e.g. electrical fire hazards), and loss of life/injuries to personnel. Observations can be classified into 5 major areas: i) Design features ii) Maintenance aspects iii) Training needs iv) Facilities and Procedures v) Management commitment. Recommendations as identified in the audit shall be implemented on a time bound program, and they shall be closely monitored for timely completion.

Load flow studies determine the voltage, current, active, and reactive power and power factor in a power system. Load flow studies are an excellent tool for system planning. A number of operating procedures can be analyzed, including contingency conditions, such as the loss of a generator, a transmission line, a transformer, or a load. These studies will alert the user to conditions that may cause equipment overloads or poor voltage levels. Load flow studies can be used to determine the optimum size and location of capacitors for power factor improvement. Also, they are very useful in determining system voltages under conditions of suddenly applied or disconnected loads. The results of a load flow study are also starting points for stability studies.

The ability of a power system, containing two or more synchronous machines, to continue to operate after a change occurs on the system is a measure of its stability. The stability problem takes two forms: steady-state and transient. Steady-state stability may be defined as the ability of a power system to maintain synchronism between machines within the system following relatively slow load changes. Transient stability is the ability of the system to remain in synchronism under transient conditions, i.e., faults, switching operations, etc. In an industrial power system, stability may involve the power company system and one or more in-plant generators or synchronous motors. Contingencies, such as load rejection, sudden loss of a generator or utility tie, starting of large motors or faults (and their duration), have a direct impact on system stability. Load-shedding schemes and critical fault-clearing times can be determined in order to select the proper settings for protective relays.

A well-organized and implemented preventative maintenance program minimizes accidents, reduces unplanned shutdowns, and lengthens the mean time between failures (MTBF) of electrical equipment. Benefits of EPM can be categorized as direct and indirect. Direct benefits are derived from reduced cost of repairs, reduced downtime of equipment, and improved safety of personnel and property. Indirect benefits can be related to improved morale of employees, better workmanship, increased productivity, and the discovery of deficiencies in the system that were either designed into the original system or caused by later changes made in the system.

The need for direct current (dc) power system analysis of emergency standby power supplies has steadily increased during the past several years in data processing facilities, long distance telephone companies, and generating stations. DC emergency power is used for circuit breaker control, protective relaying, inverters, instrumentation, emergency lighting, communications, annunciators, fault recorders, and auxiliary motors. The analysis may include Battery (UPS) Sizing, Load Flow, & Short Circuit Analysis, and evaluating all loading conditions for DC duty cycle loads and AC emergency loads.