2.  Volt- Is the measurement unit of the electrical potential.  Electrical Potential- The difference of voltage between two points in a circuit. It is the cause of the flow of a current.  Current- The movement of electrical charges in a conductor; carried by electrons in an electric conductor (electric current) or by ions in an ionic conductor. (ionic current)

3.  Alternating Current (AC)- Current that repeatedly changes its direction or strength, usually at a certain frequency.  Hertz (electrical)- Alternating current (AC), whose waveform is that of a sine curve.  Ampere (simple)- A unit of electric current  Short Circuit- A low- resistance connection established between two points in an electric circuit.

4. Electrical equipment shall be repaired by qualified electrical maintenance employees or certified contractor only.  Treat every circuit as if it is energized.  Disconnects and/or breakers should always be locked and tagged when power has been cut off for maintenance on the equipment.  Electrical equipment should be properly grounded.  Any malfunction of any electrical equipment shall be reported to the maintenance work group.

5.  Medium voltage AC is supplied by the utility company and passes a medium voltage circuit breaker in the electrical room.  When all process interlocks are ready, the breaker is allowed to close and pass this AC voltage to the rectifier “Transformer.”  The transformer steps down the voltage to the specifications of the rectifier of approx 500 volts AC.

6.  The rectifier converts the AC voltage to usable DC voltage. The dc voltage coming from the rectifier passes through two DC isolated switches and on to the Electrolyser.  The amount of total voltage at the Electrolyser is determined by the number of cells installed and aging of membranes.  The actual current to the Electrolyser shall be controlled by the CR operator and is the determining factor of plant production rates up to 17,000 amperes.

7.  A) all metal tools used inside Electrolyser working zone shall be no longer than the shortest distance between the Electrolyser and the next equipment or module structure.  Metal extensions are not permitted.  B) never crawl below Electrolyser in operation.  C) never leave doors on rectifier open.  D) Must wear electrically insulated shoes within the cell room area.  E) Use caution when using water near the Electrolyser.

8.  F) Avoid electrical shock contact of a cell and the ground.  G) Brine and caustic leaks in the Electrolyser shall be repaired ASAP to reduce the number of paths for current to flow to the ground.  H) During maintenance, ground bus bars for electrical protection.  I) A warning sign shall be posted to warn people with pacemakers or medical implants.  J) A 4 inch wide yellow line surrounds the cell room, everyone within the line must wear the prescribed PPE.

9.  The Electrolyser produces chlorine and hydrogen gas. Hydrogen gas is odorless, tasteless, sightless gas that is lighter than air.  Hydrogen can be ignited by electrical spark and static electricity.  If leak is detected notify Control Room Operator.

10.  The plant utilizes a voltage monitoring system to detect pin holes that develop in the membrane.  When an individual cell is out of range the control system will be sounded.  If the voltage is dangerously out of range the plant will shut down.  This is what can happen if there is a rupture in the membrane of a mix of hydrogen and chlorine in the electrolyser.