Field Services
Turnkey substation services — new construction, scheduled maintenance, switch and transformer work, testing & diagnostics, and emergency repairs. Serving utilities and co-ops across Florida and the Southeast.
brought to your site.
Our tool trailer puts a fully-equipped mobile shop right at the substation — tools, equipment, and supplies staged on site so our crews can do the work wherever the job is, without trips back and forth to the shop. Pictured on the job in Central Florida, beneath the landmark “Mickey” transmission towers.
on a Baron rig.
Our Baron rig brings transformer oil processing to you — vacuum dehydration and hot oil processing — so we can dry, filter, and recondition oil right on site. Baron is the industry standard for this equipment, and it’s the rig we operate.
New substation construction from greenfield through commissioning. On time and on budget — with the advantage that we manufacture many of the components installed.
- Greenfield substation construction
- Equipment installation & setting
- Bus work & connections
- Control & relay installation
- Commissioning & energization support
Scheduled and corrective maintenance for substation equipment. Experienced with all major manufacturers across Florida and Southeast utility systems.
- Switch maintenance & repair
- Transformer processing & service
- Circuit breaker maintenance
- Switch bearing refurbishment in the field
- Testing & diagnostics
Scheduled, corrective, and emergency work across the substation — transformers, breakers, and disconnect switches. Any parts required can be supplied by Southern Switch & Contacts, manufactured to meet or exceed OEM specifications.
- Inspection
- Bushing changeout
- LTC inspection & maintenance
- LTC motor drive maintenance & repair
- Pump & valve maintenance & repair
- Fan & radiator repair
- Vacuum dehydration
- Hot oil processing
- Control cabinet repair & replacement
- Overall touchup & painting
- Regasketing & assembly
- Preventive maintenance
- Testing
- Bushing changeout
- Breaker changeout
- Commissioning
- Control cabinet repair & replacement
- Oil filtering
- Touchup & painting
- Inspection
- Adjustment
- Testing
- Installation
- Replacement parts
- Refurbishment — live parts, bearings, operators
- Bus modification
field or shop.
Comprehensive electrical testing of transformers, circuit breakers, and substation systems — powered by the Doble M4100 high-voltage apparatus tester, the Doble M5400 for SFRA, and the EZCT-2000C for CT testing, plus infrared scanning, battery-bank testing, and SF6 gas service.
- Dielectric testing
- DGA oil testing
- Overall power factor & capacitance
- Bushing power factor
- 3-phase or 1-phase TTR
- 3-phase or 1-phase excitation current
- 3-phase winding resistance
- 3-phase or 1-phase leakage reactance
- Insulation resistance
- CT testing (EZCT-2000C)
- SFRA (Doble M5400)
- Oil, vacuum & SF6 breakers
- Bushing power factor
- Hi-pot
- Insulation resistance
- DLRO contact resistance
- Timing tests
- Infrared (thermographic) scanning
- Battery bank testing
- SF6 gas analysis & handling
Leaking ABB breaker mechanism? See how we reseal, repair a cracked manifold, and pressure-test the unit for 24 hours before it ships back.
comes at 2 AM,
we answer.
Unplanned outages are costly. Our emergency response dispatches an experienced crew fast — and because our machine shop runs the same way, we can fabricate any needed replacement parts and have them at your site the same day.
not just “testing.”
Every service below is a real page with the named test methods, the standards they follow (NFPA 70B, IEEE C57, IEEE C37, IEEE 400, IEEE 450, NERC PRC-005), and the apparatus we cover. Click in to see what gets tested and how.
Documented acceptance tests on new substation equipment before energization.
NFPA 70B and IEEE-aligned periodic testing to keep substation equipment in service.
DGA, oil quality analysis, TTR, Doble power factor, and SFRA on power transformers.
Contact resistance, timing, HiPot, and primary injection on oil, vacuum, and air breakers.
VLF tan delta, partial discharge, insulation resistance, and HiPot on medium-voltage cable.
Thermographic surveys of energized substations with documented anomaly reports.
IEEE 450 / 1188 testing on station batteries, chargers, and DC distribution.
Routine and detailed walkdowns — safety, asset condition, NERC PRC-005 readiness.
we install.
When a repair stalls because a contact or component has been discontinued, we don’t wait on a supplier — we make it in our own machine shop, to OEM dimensional spec, with material certification available on request. Manufacturing utility components in Palm Harbor, FL since 1982. Most field crews can’t say that.
utility world.
From investor-owned utilities to municipal power, cooperatives, industrial plants, renewables, and data centers — wherever there’s a substation, we supply the parts and the crews.
Keeping large T&D fleets in service.
A responsive, FMEA-member partner.
Parts for equipment the OEM dropped.
Uptime for plant substations.
Collector substations & tap changers.
Mission-critical power reliability.
on every site.
Working inside an energized substation leaves no room for shortcuts. Our crews follow utility safety requirements and industry best practices on every job, and we keep our contractor-safety prequalification current with the platforms utilities rely on. Southern Switch & Contacts is an approved vendor for multiple utilities in both ISN (ISNetworld) and Avetta — so the compliance paperwork is already in place before we mobilize.
- Approved vendor in ISN (ISNetworld)
- Approved vendor in Avetta
- Prequalified for multiple utilities
- Experience Modification Rate (EMR): 0.82
- Experienced, safety-trained substation technicians