UK Power Networks OPERATIONAL BULLETIN
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1 Document No: HSS 406 OB 160 Issue Date: 10 July 2018 Type: Operational Safety Subject: Changes to DSR procedures 2018/1 Applicable Areas: All Applicable Job Roles: All DSR holders Issued By: Dudley Sparks Author: Nicola Saunders Circulation: All UK Power Networks Staff Asset Management Capital Programme & Procurement Connections Contractors Customer Services Finance G81 External website HR & Communications ICPs (Independent Connection Providers) IDNOs (Independent Distribution Network Operators) Information Systems Legal Meter Operators Network Operations EPN LPN SPN Connections Services Distribution Capital Delivery Highway Services Logistics Network Control Powercare Transport Services SHE&TTA In Business safety team Safety Reps Strategy and Regulation UK Power Networks Services Please consult the author if you have any queries about the information below. The following changes to procedures take immediate effect. If you are a DSR holder please keep a printed copy of this bulletin in your DSR procedure book. Please see the accompanying PowerPoint which also describes the changes: For UK Power Networks staff: Changes to DSR Procedures For Contractors: Changes to DSR Procedures Page 1 of 5
2 DSR Excavating Near Electricity Cables DSR clarification. Electrical Competency is defined as being eligible to hold a copy of the DSRs as per DSR Note: text in red and underlined is additional to the current version of DSR DSR Issue of DSRs DSR Appendix A eligibility for DSRs A person with the competency Carry Out Excavation Only regardless of other competencies held is now eligible to hold a copy of the DSRs. This means, in conjunction with the clarification above, that when excavating in a secondary substation, a Limitation of Access (LoA) is only required if the technically competent person putting the person to work considers it necessary. Page 2 of 5
3 DSR Identification of Points of Work. On some types of early SF6 RMUs, the gas circuit breaker (GCB) will trip on low gas and cannot be reclosed without re-gassing. Where the unit is being replaced, to prevent having to re-gas in order to comply with the current version of DSR , the following procedure has been added. Note: text in red and underlined will be added to the current version of DSR Page 3 of 5
4 DSR How to Ensure Low Voltage Customers Have Correct Polarity and Phase Rotation The following procedure (which must be read as part of DSR ) gives guidance when a cross polarity is discovered by a person working alone. Note: text in red and underlined is additional to the current version of DSR DSR section Positive electrical identification using an approved signal device. Section Positive electrical Identification using an approved signal device 1 st paragraph reworded regarding the use of new LV cable identifiers and the term Grumbler has been replaced with LV cable identifier. The changes are due to the issue of HSS (Identification of Neutral Conductor on LV Underground Cables). Page 4 of 5
5 DSR section UK Power Networks This change will affect relevant staff working in the LPN licence area With immediate effect, the permission to issue a Limitation of Access (LoA) safety document for work on the LV tails of a distribution transformer when an isolated circuit breaker is used as a point of isolation on the HV side of the transformer has ceased and a Permit to Work (PTW) shall be issued. Please cross through the relevant paragraph in your copy of DSR section as shown below. There are also some additional requirements to aid the auditing process. Please see procedure for details. DSR , DSR , DSR , DSR , DSR & DSR will be updated on the intranet with immediate effect. A new wire bound DSR procedure book will be re-issued in due course, at which point this bulletin will be withdrawn. Page 5 of 5
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