BC HYDRO REAL TIME OPERATIONS DISTRIBUTION OPERATING ORDER 1D-23. PERMIT FOR ENTRY INTO CABLE MAN HOLES Supersedes 1D-23 issued 29 February 2016

Transcription

1 BC HYDRO REAL TIME OPERATIONS DISTRIBUTION OPERATING ORDER 1D-23 PERMIT FOR ENTRY INTO CABLE MAN HOLES Supersedes 1D-23 issued 29 February 2016 Review Year 2021 Original signed by APPROVED BY: Doug Pochailo System Control Manager, Real Time Operations Denotes Revision

2 1.0 GENERAL DOO 1D-23 Page 2 of 7 This purpose of this operating order is to define the procedures used by the BC Hydro control centre for the application of a Man Hole Permit (MHP). The application of an MHP is reserved exclusively to support entry into a BC Hydro cable manhole, where either: A BC Hydro owned Feeder Cable exists, as defined in 1T-02, or A BC Hydro owned main trunk cable circuit exists, which extends beyond the portion of circuit defined as The Feeder Cable but not beyond protective fusing. Example: On circuit DGR 88, UC 7F149 Application of an MHP is not intended to minimize hazards associated with underground cables which are normally protected by fusing. When a MHP is issued for work in a manhole where both Feeder and fused cable (typically URD) exist, the BC Hydro control centre Person-In-Charge (PIC) will take positive and documented steps to help minimize hazards associated with the Feeder Cable. It is not expected that the PIC will take any action to minimize hazards associated with the fused cables. Should any hazard exist where the issuance of a MHP is deemed by the field worker as inadequate to meet worker safety requirements, the field worker is responsible to then arrange additional equipment outages, Safety Protection Guarantees or Assurance of No Reclose Permits as required, by making their requirements know to the Fraser Valley Office (FVO) Outage Scheduling department. See Operating Order 1D-02 for BC Hydro outage scheduling requirements. It must be firmly recognized that the application of a MHP is intended to help minimize the hazards associated with an energized Feeder Cable which exists in a BC Hydro manhole. There is no expectation that the application of a MHP can eliminate all hazards associated with entry into a manhole.

3 Page 3 of 7 The BC Hydro control centre will not take any action to address hazards introduced by the existence of customer-owned cables in a BC Hydro manhole, unless a customer Operating Order exists with specific instruction and requirements. 2.0 MAN HOLE PERMITS Prior to issuance of a MHP, there are no requirements for feeders to be in their normal operating configuration. In manholes where Feeder Cable exists, establishing a MHP will assist in minimizing the effect of additional s being switched on to a cable and will restrict the re energization of a cable after a feeder protection operation. Application of a MHP guarantees that a de-energized feeder, or one that becomes de-energized by its own protection, will not be energized until the Permit holder has been contacted and has approved the energization. For the purposes of re energization, a MHP will be restricted in the same manner as a Live Line permit and will conform to Safety Practice Regulation A circuit with a MHP in effect, may not be paralleled with another circuit, without first notifying the MHP holder. Persons holding MHP must be in radio or telephone contact with the BC Hydro control centre at all times. If continuous communication is not possible to maintain, information may be relayed via a reliable third party. Should a circuit, where a MHP is to be issued, be connected to a BC Hydro owned high voltage automatic transfer scheme, this scheme will be blocked prior to issuance of the MHP. Customer owned auto transfer schemes will not be blocked as part of the MHP process. 3.0 IMPLEMENTATION 3.1 Circuit Identification Responsibility Qualified Worker Responsibility for identifying the circuits that are routed through a manhole resides with the qualified electrical journeyperson that will be performing the work. If the worker is unable to perform an accurate verification on his own, they must consult with the BC Hydro Cable Department. The worker requesting the MHP will identify the work location and the required circuits to the PIC. Example: I (name) am requesting a Manhole Permit for work in manhole MH1234. The feeder cables in this manhole are STN 12F51, STN 12F52 and main trunk circuit UC7F12 on STN 12F54. BC Hydro Control Centre The PIC at the BC Hydro control centre is responsible to identify all directly associated feeder reclosing equipment and those BC Hydro owned schemes capable of automatically transferring to that circuit. 3.2 BC Hydro Control Centre Implementation The BC Hydro control centre will accept verbal, faxed or requests for MHP in real time. permit.requests@bchydro.com Fax:

4 Page 4 of 7 Once the appropriate circuits have been identified by the qualified electrical journeyperson, the BC Hydro control centre will establish conditions for a MHP by: Blocking the source circuit breaker auto reclosing control and tagging the associated control point in the PSSP mimic with a Reclose off tag. Enabling, where Scada control facilities exist, feeder protection fast trip, or Live Line settings at the source circuit breaker. Once done, the PIC will tag the fast trip control with a Reclose Off tag. Placing Man Hole Permit tags on the appropriate supply feeder breakers or switches in the PSSP mimic. Blocking any BC Hydro automatic control scheme that might transfer to a circuit where a MHP is to be issued and tagging that point with a Man Hole Permit tag. Entering the Permit details in the appropriate BC Hydro control centre Desk Log. After the appropriate conditions have been established, a MHP may be issued to the requesting PSSP Category 5 worker. 3.3 Automatically Switched Devices Where BC Hydro owned automatic switch facilities could result in transfer to the circuit where MHP is to be applied, the automatic operation of these facilities must be blocked and tagged appropriately. BC Hydro-Owned Devices, SCADA-Controlled From the BC Hydro Control Centre The PIC will disable automatic control and tag the associated control point in the PSSP mimic with Reclose off tags. The related source switch or breaker electrically nearest to the workers location will be tagged in the PSSP mimic with a Man Hole Permit tag. BC Hydro-Owned Devices, NOT SCADA-Controlled From the BC Hydro Control Centre A BC Hydro worker will be directed by the BC Hydro control centre PIC to disable the appropriate automatic control scheme and apply Reclose Off tags. The BC Hydro control centre PIC will then tag the corresponding PSSP mimic point with a Reclose Off tag(s). The BC Hydro control centre PIC will tag the PSSP mimic for the related source switch or breaker electrically nearest to the workers location with a Man Hole Permit tag(s).

5 Page 5 of REVISION HISTORY This order should also be distributed as follows: Posted on BC Hydro s external website Revised by Revision Date Summary of Revision DSP 04 September 2012 Removed requirements for customer owned auto transfer. K. McCormick 05 December 2012 Section 3.2 corrected cable department, to qualified electrical journeyperson. D. Clayton 14 January 2013 Appendix 1 Added BSC. D. Pochailo 29 Feb 2016 Major revision to remove 1D-23 from the pilot phase. D. Pochailo 19 April 2017 Section 3.2 made the enabling of LL PN for MHP issuance mandatory.

6 APPENDIX 1 CIRCUITS WITH BC HYDRO AUTOMATIC TRANSFER SCHEMES DOO 1D-23 Page 6 of 7 Circuit Location Switch type Notes CSQ 12F615 QE Theatre and Post Office open loop Vista switch vista switch CSQ 12F616 QE Theatre and Post Vista switch Office open loop Vista switch RBW 25F64 Whistler sliding Vista switch centre FCN 25F62 Whistler sliding Vista switch centre RBW 25F66 Whistler Celebration Vista switch Plaza RBW 25F21 Whistler Celebration Vista switch Plaza SPG 12F111 Nat Bailey, Hillcrest Vista switch and Curling SPG 12F68 Nat Bailey, Hillcrest Vista switch and Curling RIM 12F64 Richmond Ice Oval Vista switch and SEA 12F56 Richmond Ice Oval Vista switch and HPN 12F325 Old VANOC Offices, Vista switch Gravely, Vancouver HPN 12F75P Old VANOC Offices, Vista switch Gravely, Vancouver CSQ 12F126 Vancouver Vista switch Convention Centre MUR 12F62P Vancouver Vista switch Convention Centre, Port Shore Power CSQ 12F526 Vancouver Vista switch Convention Centre MUR 12F52Q Vancouver Vista switch Convention Centre, Port Shore Power CSQ 12F211 Port Shore Power Permission to close CSQ 12F111 Port Shore Power Permission to close MUR 12F62P Port Shore Power Permission to close MUR 12F52Q Port Shore Power Permission to close SPG 12F422 Vancouver Athletes Vista switch and Village MUR 12F69 Vancouver Athletes Vista switch 41525, Village and SPG 12F413 Vancouver Athletes Vista switch 41530, Village and Auto switching remote, Normal OFF Auto switching remote, Normal OFF

7 Page 7 of 7 Circuit Location Switch type Notes CSQ 12F623 GM Place (Rogers Vista switch Arena) MUR 12F87 GM Place (Rogers Vista switch Arena) CSQ 12F314 Dual Radial Vista switch CSQ 12F611 Dual Radial Vista switch JLN 12F52Q Park Royal South (PRC) NOR 12F61 PKL 25F54 HRD 25F51 VNT 25F55 VNT 25F64 GLS 25F52 SAL 25F64 Park Royal South (PRC) Fraser Valley Operations (FVO) Southern Interior Operations (SIO) Galiano (GLS) and Saltspring Island (SAL) LTS2 CB 7569, CB 7570, CB 7568 normally closed LTS1 CB 7565, CB 7566, CB 7567 normally closed Auto change-over on LV CB s at customer s stations Auto change-over on LV CB s at customer s stations Auto transfer scheme Mayne, Saturna and Pender Islands Loss of NOR 12F61 automatically adds to JLN 12F52Q. Open a LTS1 or LTS CB to stabilize and maintain. 7D-PRC-01 Loss of JLN 12F52Q automatically adds to NOR 12F61. Open a LTS1 or LTS CB to stabilize and maintain. 7D-PRC-01 Auto switching to alternate circuit can add. Customer can turn off auto transfer (see FVO DOO) Auto switching to alternate circuit can add. Customer can turn off auto transfer (see SIO DOO) Auto switching to alternate circuit can add. To block scheme see DOO 7D-GIL-01