An experienced street lighting team’s perspective - Scotland has a strong focus on accelerating the provision of electric vehicle charging infrastructure. Data shows that outside of London, Scotland is way ahead of the rest of the UK in the provision of public charge points. So, what can be learnt from Westminster’s EV charging rollout? The process has been managed by a specific team, with technical input from the council’s street lighting team. This CPD presentation will give the street lighting team’s view of the in-column EV charging rollout in the council. Covering the expectations versus reality under current standards, the issues found following installation, and the ever-changing landscape of what can be allowed on the highway, this session will benefit every street lighting professional with an involvement in EV charging. The webinar will also include an overview of the issues to consider with rapid chargers. Speaker: Dean Wendelborn BE(Civil) and Dip.Lighting (LET), Westminster City Council

1. Electric Vehicle in-column charging review

2. • Existing Westminster charging
background & modelling
• Changes and Issues
• Rapid chargers
• Future Ready
• Other uses/issues

3. • Existing Westminster charging background &
modelling

4. EV totals on Westminster highway
Type
Current
total
Rollout
2021/22
5.5kW Lamp Column charging point 804 440
7kW Free-standing charger 153 0
22kW Free-standing charger 16 30
50kW rapid charger 31 30
Total Charge Points 1,003 500
Council’s EV Charge Point Strategy 2019-2025 sets an
ambition to install 200 charge points each year or ambitious
target of 500 charge points per year.
For information, Greater London have 7,300 EV chargers

5. • Supply - Available Lamp Columns
• Demand - Resident Requests
• Modelling - Location Allocation

6. • Supply - Available Lamp Columns
Wi-Fi/4G devices – space in column doors taken up with additional
cut-outs and cabling
New Bond Street – cast iron columns installed 1905

7. • Supply - Available Lamp Columns
Large Grey Wornum Column embellishment
Satellite bollard

8. Westminster Charge Points - April 2019
• Demand - Resident Requests

9. Westminster Charge Points - April 2021
• Demand - Resident Requests

10. • Modelling - Location Allocation
Ward map of column locations

11. • Modelling - Location Allocation
Adding EV owner locations

12. • Modelling - Location Allocation
EV owner locus (mid-points)

13. • Modelling - Location Allocation
Straight line walking distance to EV column

14. Percentage within: April 2020 April 2021
1-minute walk 36.9% 66.3%
2-minute walk 74.2% 93.1%
• Modelling - Location Allocation

15. Dedicated Resident Charging Bays
• Modelling - Location Allocation
Average Number of Chargers per lamp column charging point
Per Month

16. Projected Number of Eco Permits and Required Charging Infrastructure
Based on an estimated 8 vehicles per lamp column charging point
• Modelling - Location Allocation

17. Type
Current
total
Rollout
2021/22
5.5kW Lamp Column charging point 804 440
7kW Free-standing charger 153 0
22kW Free-standing charger 16 30
50kW rapid charger 31 30
Total Charge Points 1,003 500

18. • Changes & Issues

19. • Moving goal posts (standards)
BS7671 reg changes from PME with good ELI – changed to TT with RCD and earth mat – changing again?

20. • Earthing distance to above and below ground
metalwork

21. Earth mat installation
• Issues – earth mat damage

22. Live column due to damaged cabling
• Issues – live column due to damaged cabling

23. • Issues – nuisance tripping
RCD harmonics the issue? Change supplier?

24. • Changes to BS7671, again
6.2.16 Electric Vehicle Charging Points (EVCP)
This Section applies to EVCP which are either themselves street electrical fixtures or are connected to street electrical fixtures.
Where the EVCP is of Class I construction as defined in BS 7671, a PME earth terminal may be provided if the requirements of BS 7671 are satisfied and the connection point presents a 3-phase
balanced load.
The risk of a neutral fault on EVCP installations is sufficient to classify them as special situations where the consumer must utilise an additional or alternative form of protection to PME.
6.2.16.1 Alternative Form of Protection to PME
A mains-derived earthing terminal is not required for Class II installations. EVCPs and the associated vehicle should preferably be of Class II construction or equivalent as defined in BS 7671.
A TT system earthing arrangement is a suitable alternative earthing arrangement, which will remove the potential risk caused by the rise of voltage on a consumer’s earth terminal in the event of
an open neutral condition. Due to the higher tolerable voltages at on-street locations (compared to those specified in BS 7671), where individuals are likely to be wearing footwear and standing
on high resistance surfaces such as tarmac, separation between the TT earth and underground metallic services is not considered necessary.
Where it is not reasonably practicable to install a TT system earthing arrangement at on-street locations, an additional form of protection should be installed.
6.2.16.2 Additional Form of Protection to PME
Section 6.2.14 and 6.2.15 of this document includes the use of a supplementary electrode as a suitable additional form of protection when used with PME. The assumptions made in determining
this suitability were that a member of the public would not deliberately touch an installation such as a street lighting column or other street electrical fixture resulting in any contact being
fleeting and infrequent. It was also assumed that any contact scenario would be during dry conditions with the individual wearing footwear.
For an EVCP installation the contact by a member of the public to the charging point, to connect and disconnect the vehicle and to the vehicle (which will become an extension of the charging
point installation) will be frequent and less fleeting in nature than for a typical street electrical fixture installation. As EVCPs will be used in all weather conditions, the contact scenario should be
assumed to be in wet conditions. For these reasons, the value of impedance to earth of a supplementary electrode used as the sole means of additional protection for an electric vehicle charging
point is required to be less than as described in Section 6.2.15. Consequently, this approach has been discounted for EVCPs.
BS 7671 section 722 permits the protection against electric shock to be provided by the use of a protective device which responds to an open neutral condition.
Where an open neutral detection and earth disconnection device is used as the additional form of fault protection the designer, installer and owner of the consumer’s installation must ensure
that the device is designed, installed, maintained and operated to protect members of the public from the risks associated with the rise of voltage on the installation earth terminal in the event of
an open neutral condition.
As a minimum requirement, any open neutral detection and earth disconnection device must be designed to comply with the guidance in the current version of BS 7671 and to comply with all
relevant national and international technical construction and design standards.
At the time of writing no definitive standards were in existence for the design and construction of an open neutral detection and earth disconnection device. Until such standards are developed,
in addition to the requirements above, it shall be demonstrated that the device is fit for purpose by type testing and certification at an independent test centre to:
· Verify that it responds to all likely fault scenarios, under typical system and environmental conditions.
· Verify it locks out on detection of a fault scenario.
· Demonstrate that it does not falsely operate under expected network operating conditions.
· Demonstrate that it is fail-safe to prevent the operation of the charger if any major or significant component fails.
http://www.dcode.org.uk/consultations/open-consultations/

25. • PME broken earth – neutral detectors
Matt:e CityEV safevolt Garo

26. • Rapid chargers

27. • Fast & Rapid chargers
Rapid Charger on TfL network
Fast chargers

28. • Future Ready

29. • Future Ready – UKPN Scenarios

30. • Future Ready
Double door 10m large grey wornum
Double door 8m column

31. • Other uses/issues

32. • Other uses
Market trader satellite bollards

33. • Other things to consider
Column doors 90% to kerb so not blocking footway Private EV supplies not supported

34. • Other things to consider
Column drilling heights exclusion zone for external chargers
GN12/21 The Smart Lighting Column

35. Electric Vehicle in-column charging review