CABLE FAULT LOCATION · PORTABLE VS VAN-MOUNTED
Short answer: the decision is not really portable versus built-in. It is faults per year. Below roughly a dozen jobs a year, a portable set that fits in the truck you already own is almost always the better business case. Above that — especially on long feeders or high-resistance faults — a van-mounted system pays for itself in deployment time and surge capability, because the crew stops unloading and reassembling the same equipment every morning.
- A complete fault location job is four steps: pre-locate, surge, pin-point, and sheath check — plan equipment per step, not per brand
- Portable wins on access and capital; built-in wins on energy, repeatability and deployment speed
- You can rent every one of these steps in Canada, which is how most teams size the decision before buying
Choosing between a portable cable fault location system and a built-in, vehicle-mounted one depends on more than budget. What actually decides it is the shape of your work: how many faults you chase per year, how long and how high-voltage your feeders are, where the cable runs, and who is expected to carry the equipment to it.
There is also a confusion worth clearing up before any quotation, because it sends teams to the wrong product page. Testing and diagnostics are not fault location. They answer different questions with different equipment.
Two different jobs that keep getting mixed up
| |
Testing & diagnostics |
Fault location |
| Question |
Is this cable healthy, and how far has it aged? |
Where is the fault, and where do we dig? |
| Timing |
Planned — scheduled with an outage |
Unplanned — the cable is already out |
| Typical equipment |
VLF withstand, tan delta, partial discharge |
TDR, surge generator, pin-pointing, sheath fault locator |
| BAUR examples |
viola, viola TD, Frida TD, PHG 80 TD/PD |
TDR811P, Syscompact, SSG series, Protrac, SHIRLA |
Both matter, and most well-equipped Canadian teams end up owning something from each column. But when you are comparing portable against built-in, make sure you are comparing the same column — the transport problem is completely different for a 5 kg TDR than for a 160 kg HV generator. For the diagnostics side, the cable diagnostics guide covers how the layers fit together.
What a fault location job actually involves
- Pre-location. A TDR sends a pulse down the cable and measures the reflection, giving you a distance to a low-resistance fault, a splice or an open circuit. Fast, no heavy equipment, and it usually narrows the search from kilometres to a span.
- Surge / flashing. For high-resistance or intermittent faults that TDR cannot resolve, a surge generator (SSG2100, SSG3000, or a rented SSG1500) energises the fault until it flashes over, so it can be heard and located acoustically.
- Pin-pointing. An acoustic or electromagnetic pin-pointing system on the ground gives the exact spot — this is the step that decides how big the excavation is.
- Sheath fault location. On cables where the outer covering has been damaged — common after third-party excavation — a sheath fault locator finds the entry point for water ingress before it becomes next year's failure.
Notice where the bulk and power live: steps 2 and 3. That is why the portable-versus-built-in question is really about the surge generator and the crew's tolerance for moving it.
The eight things that actually decide it
| Decision point |
Leans portable |
Leans built-in / van |
| Faults per year |
Occasional — a handful, often on short notice |
Regular work, several per month, crews dispatched daily |
| Network length and voltage |
Short MV feeders, industrial plants, customer-owned cable |
Long distribution feeders, higher voltages, high-resistance faults needing more surge energy |
| Site access |
Vaults, substations, congested downtown streets, indoor plant rooms |
Roadside and rural feeders where a van can park at the termination |
| Deployment time per job |
Acceptable — one setup per job, planned in advance |
Critical — the same equipment is set up and torn down every day |
| Handling and safety |
Small units one or two people can carry; no lifting equipment needed |
Heavy HV units stay mounted; no repeated manual handling of high-voltage equipment |
| Crew skill and consistency |
Experienced technicians who configure per job |
Multiple crews who benefit from a fixed, repeatable setup and stored cable data |
| Capital and total cost |
Lower capital, no dedicated vehicle, easier to share across regions |
Higher capital plus a vehicle, but lower cost per fault once volume is high |
| Growth path |
Add capability incrementally as work appears |
Modular platform that can be extended toward a full mobile diagnostic lab |
Where each approach honestly wins
A portable system is the better fit when you need: transport between sites without a dedicated vehicle; deployment into vaults, plants or congested streets; capability without committing to a van; mixed or lower-volume work where the equipment also serves testing jobs; and a capital purchase that can be shared or rented out when idle.
A built-in system is the better fit when you need: more surge energy for long or high-resistance faults; a fixed, repeatable setup that any crew can operate; integrated test, diagnostics and fault location in one vehicle; stored cable data and history for fleet-wide decisions; and room to expand as the programme grows. The van-mounted route is documented in TITRON cable test vans and the wider cable test vans and systems range.
The middle path most Canadian teams take
The two options above are not the only ones, and the binary framing is what makes this decision feel expensive. Three practical alternatives:
- Portable now, van later. Buy the portable fault location equipment — Syscompact 400 portable and a pin-pointing system — and let two years of actual job data tell you whether a van is justified.
- Rent the heavy step. Keep TDR in-house and rent the surge generator and pin-pointing equipment for the jobs that need them: SSG1500, Protrac, SHIRLA, TDR811P. For most teams under a dozen faults a year, this beats both purchases.
- Scale the fixed system. Where a van is justified, a fixed installation such as Syscompact 4000 gives the integrated workflow without designing the vehicle from scratch.
The same question for testing and diagnostics systems
Portable versus built-in also comes up one column to the left — on the VLF and diagnostics side. The trade-off is the same shape, and BAUR's published figures make the physical difference concrete:
| |
Portable example: Frida / Frida TD |
Built-in example: PHG 80 TD/PD |
| Role |
Compact VLF tester and diagnostics unit; TD version adds dissipation factor and Monitored Withstand Test |
Modular, extendable test and diagnostics system; BAUR notes it is suitable for installation in cable test vans |
| Weight |
Frida TD approx. 22 kg — transportable by hand |
HV generator approx. 160 kg; complete system from approx. 250 kg depending on configuration |
| Output (BAUR published) |
Up to 26 kVrms |
PHG 80: up to 57 kVrms, DC up to ±80 kV |
| Data handling |
Automatic test and diagnostic sequences |
Cable database, saved test results, trend analysis, automatic discharge unit |
| Choose it when |
Sites are dispersed, access is tight, and the equipment also has to serve non-cable work |
Work is high-volume, spans a wider voltage range, and needs partial discharge as well as tan delta |
Figures above are BAUR-published and should be confirmed against the current datasheet for your configuration. If partial discharge is anywhere in your plan, buy for it now — PD cannot be added to a TD-only instrument later. The comparison of the TD models themselves is covered in the viola TD guide, and the full method picture in the cable diagnostics hub.
Buying, renting and supporting fault location equipment in Canada
RCC Electronics supplies BAUR cable fault location and diagnostics equipment in Canada and supports the programme around it. Every step of the sequence above is available for rental, which is the cheapest way to find out where your volume actually sits before committing to a vehicle. Calibration and service are handled in-house — see our services — and the complete range sits under BAUR cable testing and diagnostics, with the cable fault locating and TDR categories as the fastest way in.
FAQ: portable vs built-in cable fault location
Is a portable system powerful enough for high-resistance faults?
It depends on the surge energy the fault needs, which scales with cable length, voltage class and fault resistance. Check the specific generator's published energy rating against your longest feeder rather than assuming portable is automatically enough; if it is not, the surge step is the one to rent or mount in a vehicle.
Can I start with portable equipment and add a van later?
Yes, and it is the usual route. Portable fault location equipment keeps its value when a van is added later — it becomes the equipment that goes into vaults the van cannot reach.
Do I need TDR if I have a surge generator?
They do different jobs. TDR pre-locates a distance quickly and cheaply; the surge generator makes high-resistance faults findable when TDR cannot resolve them. Skipping pre-location means a longer search and a bigger excavation.
What is the difference between a cable fault location system and a cable test van?
The fault location system is the equipment; the van is the vehicle and integration around it. A van typically combines testing, diagnostics and fault location in one mobile platform with stored cable data — see the cable test vans range.
How long does a fault location job take?
Pre-location takes minutes once the cable is isolated. The variable is pin-pointing, which depends on access, cable depth and how precisely the fault was pre-located. This is where a fixed, repeatable setup saves the most time across a year of work.
Can I rent fault location equipment in Canada?
Yes — TDR, pin-pointing, sheath fault location and surge generators are all available for rental, along with VLF and diagnostics units for the testing side.
See Portable Fault Location Systems Ask RCC to Match a System to Your Volume
* Weight and output figures are BAUR-published values for the configurations described and should be confirmed against the current datasheet before purchase. Method descriptions are summarised from BAUR published product information and RCC Electronics product listings. Standard numbers and test parameters are governed by the current standard text and the asset owner's specification.
