The document outlines the risks and control measures for high voltage switching operations being performed by E&S Electrical at the Cafe Royal HV Substation Q1 in London. Hazards identified include electrocution from incorrect HV or LV switch operation, injury from a third party after operations, and connecting in parallel with the HV supply. Control measures are proposed to reduce the likelihood and severity of each risk.

1. Risk Assessment
E&S Electrical - HV Switching Operations (March 2012)

2. ! ! !
! ! ! !
! ! ! ! Project Details
Work Description - Switching Activity at S/S Q1
Equipment Ref - RMU ‘A’ and associated LV ACB(s)
Document Date - 6/3/2012
Client - Mace
Location of Works - Cafe Royal (Regent Street)
Document Number - RA/ES/HVSW-2 - v1.0
Prepared By - Ron Richardson (APA Ltd)
Operational Date - 8/3/2012
Estimated Completion Date - 9/3/2012

3. Section Prepared By:
Ron Richardson
Document Date - 6/3/2012
Client Site Position
Mace Cafe Royal HV Substations Q1 HV Engineer
Activity Equipment Designation: Signature
HV Switching Operations RMU 'B', TX B & associated LV ACB(s)
Number of persons exposed to risks: Notes:
Factor 1 - Likelihood of harm 3 = Likely
2 = Possible
E&S Employees - 1 = Ron Richardson
1 = Unlikely
Factor 2 - Severity of Harm 3 = Major Injury Death
2 = Notifiable Incident
1 = Minor Injury
If the multiples of the factors is greater than 4 then the task must be
reviewed and controls measures must be implemented to reduce the risk
to below 4
Most Common hazards: 7 - Falls of material 15 - Flying Particles
8 - Noise 16 - Structure collapse
1 - Electrocution HV/LV 9 - Vibration 17 - Infected material
2 - Deep Excavation 10 - Dust 18 - Soft ground
3 - Demolition 11 - Heat 19 - Overhead Services
4 - Mobile Plant/vehicles 12 - Lifting Operations 20 - Confined Spaces
5 - Falls from height 13 - Entrapment 21 - Adverse Weather
6 - Falls on Level 14 - Fire/explosion 22 - Entanglement

4. Hazards
Incorrect HV Switch
Operation (Electrocution)
Control Measures
1 - Read and Understand the Method statement.
2 - Check that labels match up with system HV schematics.
3 - Check that the correct HV switch will be operated prior to use.
4 - Ensure all emergency stops have been reset.
Likelihood = 3 Severity = 3 Multiply both factors = 9
5 - Ensure all interlocking (Electro-mechanical,Mechanical
and Electronic) has been reset/replaced.
6 - Follow the 'approved' E&S Switching Schedule.
New Factors Likelihood = 1 Severity = 3 Multiply both factors = 3
(After control Implementation)
Incorrect LV Switch
Operation (Electrocution)
Control Measures
1 - Read and Understand the Method statement.
2 - Check that labels match up with system LV schematics.
3 - Check that the correct LV switch will be operated prior to use.
4 - Ensure all emergency stops have been reset.
Likelihood = 3 Severity = 3 Multiply both factors = 9
5 - Ensure all interlocking (Electro-mechanical,Mechanical
and Electronic) has been reset/replaced.
6 - Follow the 'approved' E&S Switching Schedule.

5. Third Party Injury (Post Operation)
Control Measures
1 - Ensure all witnesses have vacated the area or
are standing out of harms way.
2 - Ensure that only competent people are present
Likelihood = 2 Severity = 3 Multiply both factors = 6 within the switchroom.
3 - Ensure all person have been notified of imminent
Power Energisation
New Factors Likelihood = 1 Severity = 2 Multiply both factors = 2
(After control Implementation)
Connecting in Parallel
(HV Supply)
Control Measures
1 - Confirm that the HV 'Open Point' is switched to the
'off' position and fitted with a lock and 'Do Not Operate'
Label.
Likelihood = 3 Severity = 3 Multiply both factors = 9 2 - Confirm the status of all adjacent HV switchgear
3 - Ensure all castel keys Have been inserted into their
correct position.
4 - Ensure that no external signals are present on either
of the switches adjacent to the HV Bus-section.
New Factors Likelihood = 1 Severity = 1 Multiply both factors = 1
(After control Implementation)

6. Manual handling injuries
(Switching Tools)
Control Measures
1 - Ensure that gloves are worn prior to operation
2 - Use the tools in a correct and 'Positive' Manner.
Likelihood = 2 Severity = 2 Multiply both factors = 4 3 - Read all available documentation provided on
how to operate the Switchgear.
4 - If still in doubt, seek manufacturers advice.
New Factors Likelihood = 1 Severity = 2 Multiply both factors = 2
(After control Implementation)
Slips, trips & Falls
Control Measures
1 - Ensure access and egress are clearly defined
2 - Ensure sufficient barriers/ guards are in place
Likelihood = 2 Severity = 2 Multiply both factors = 4 3 - Make sure that all walk ways are clear from
obstruction at all times
New Factors Likelihood = 1 Severity = 2 Multiply both factors = 2
(After control Implementation)