- Before
- Watches the outage map 16:00–00:00 with 11 crews to send, and builds incidents by hand from the callers' words and pins on a map.
- Now
- Sees which homes are really off before anyone is sent, with the likely device and its proof. “Tell me which houses are really dark before I send anyone.”
How trouble call management works: one blown fuse, from 40 calls to one crew
Tuesday 13 October 2026, evening peak, Haverford district of Lumina Utilities. At 19:41:52 fuse F-2217 on pole CR07-118, on Halloway Lane by Larchmere Primary, blows and lateral CR07-L3 drops seven transformers, T-4411 to T-4417. Here is what happens next, screen by screen, in the working solution.
- 0119:42:10
Forty no-power calls in four minutes, on the map as they arrive
Rhiannon Teale · Outage desk dispatcherRhiannon has the evening shift on the outage desk. The first call lands at 19:42:10 and by 19:46:05 there are 40 from Larchmere: 28 phone, 8 app and 4 text. Every call is a ring on the outage map, drawn on feeder CR-07 from Corwen Road substation, its laterals, fuse F-2217 and the nine transformers around the calls. At 19:44:02 the Call grouper opens a cluster on lateral CR07-L3: 3 calls inside 400 m and 10 minutes, and no incident open there in the outage system.
“Larchmere: 40 no-power calls in 4 minutes” · 58 no-power calls tonight since 18:30
- 0219:43
One call heard a bang at the pole — a hazard, crew first
Call readerTomasz Brennock reports from the app at 9 Halloway Lane: “Loud bang and a flash at the pole by the school, then everything went off.” The Call reader matches the premise and the meter, finds the hazard words “bang” and “flash”, and flags the call to the dispatcher at once. Whatever his meter says later, this call is never answered with a self-check message.
“The words “bang” and “flash” are on the hazard list. A crew checks pole CR07-118 before the fuse is replaced. A self-check is never sent for a hazard call.”
- 0319:46:20
Ping 214 meters — the callers and every neighbour
Rhiannon Teale · Outage desk dispatcherBefore anyone is sent, Rhiannon presses Ping 214 meters: the callers and their neighbours on 9 transformers. The Meter pinger sends on-demand pings through the head-end, with 3 retries per meter at most, and the wave runs out from the calls across the streets of Larchmere.
“Ping the meters to see which homes are really off. Until then every call waits on the cluster, except the hazard.”
- 0411 seconds later
38 callers off, 2 on — and one fuse behind the dark homes
Meter pinger and Outage tracerAt 19:46:31 the answers are in: of 214 homes, 171 are off and 43 are on; of 40 callers, 38 are off and 2 are on. The dark homes trace a single lateral back to fuse F-2217, and the Outage tracer names it the likely device at 92%. From the first call at 19:42:10 to the outage confirmed with its fuse at 19:46:40 took 4 minutes 30 seconds.
“Likely device: fuse F-2217 · 92%” · “First call 19:42:10 → outage confirmed with its fuse 19:46:40 · 4 min 30 s”
- 05The agents' run
Every step on the record, with its proof
Six agentsThe run on the cluster shows each agent's step and its time. All 171 silent meters sent last gasp at 19:41:52–54; the 43 that answer read 236–242 V. Every dark meter is behind F-2217 and no answering meter is. The Reply writer drafts 2 self-check messages, and the Dispatch drafter proposes truck 14 — Joel Varga, 6 minutes away, 100 A fuse kit on board — and waits for the dispatcher.
“Dispatch drafter · truck 14 proposed … Waiting for the dispatcher”
- 0614 Linden Row
The street is dark, but her meter answers at 239.6 V
Elsie Hale · CustomerElsie called at 19:42:35: “Power’s gone. The whole street is dark, I can see it from the window.” Her meter answers at 239.6 V. Her home is on transformer T-4421, fed from lateral CR07-L4, which never lost supply. The load fell to zero at 19:41:55, three seconds after the voltage dip from the fuse on the next lateral, and the premise history shows two earlier RCD resets here, in March and August 2025. Most likely the RCD tripped again.
Without the ping, she would stay dark after the fuse is replaced and call again.
- 07Why fuse F-2217
One incident for 171 customers, with the evidence
Outage tracerINC-26-30871 groups 40 calls into one incident: 171 customers off, 3 on the priority register. The Outage tracer lists its reasons — the last gasps from T-4411 to T-4417, the seven transformers sharing only lateral CR07-L3, the 43 meters on CR07-L4 answering, the bang at pole CR07-118, and no incident open on CR07-L3 before the calls. It also shows what it ruled out: transformer T-4411 alone, at 3%, because six other transformers are dark too.
Below 80% confidence the Outage tracer names the area, not a device. The dispatcher confirms the device.
- 0819:47
Two self-checks sent, the incident confirmed, truck 14 approved
Rhiannon Teale · Outage desk dispatcherRhiannon sends the self-check to the two homes with power, confirms the incident and approves truck 14, with a restoration estimate of 21:30. 169 customers get the restoration update by text and app; Amara Quist in the contact centre phones 2 of the 3 priority customers; the third asked for text only. At 19:52 Elsie Hale replies: “FIXED, the trip switch was down.” Marcus Webb at 7 Orchard Close replies FIXED at 19:55.
“Elsie Hale, 14 Linden Row: “FIXED, the trip switch was down” · 19:52”
- 09After the message
The self-check, then a re-ping 20 minutes later
Reply writer and Meter pingerThe message tells the customer their smart meter shows power reaching the home, asks them to check the fuse box — main switch and trip switch first, and not to touch it if it is wet, damaged or hot — and to reply FIXED or STILL OFF. Twenty minutes later the meter is pinged again: load back closes the call with no visit; still off with voltage present brings electrician advice and a call-back; a meter that has gone silent gets a crew job drafted.
Sent only when the meter answers with voltage, the call has no hazard words and the customer is not on life support.
- 10Tonight
One crew to the fuse, seven truck rolls held
Joel Varga · Troubleman, truck 14Joel is on the way to pole CR07-118 to inspect it and replace F-2217, with the hazard note “Bang reported · check before re-fusing”. Every job on the crew board carries its proof: a ping with 171 off and last gasp, hazard words with the meter on, a meter off alone, a silent meter with its neighbours on. Seven homes whose meter answered with voltage got a self-check message instead of a crew.
“The meter answered with voltage, so the home has power: a self-check message went instead of a crew.”