Your FIRST Responders

Since 1994, Delta Testing Services, Inc. has offered full-service electrical testing services on a wide variety of electrical apparatuses used to generate, transform, and distribute electricity. Delta has grown into the largest electrical testing company on the southern central valley of California by specializing in acceptance and routine testing, maintenance, service, repair and upgrades.

We Offer

  • Full-service Substation Maintenance
  • 24-hour response
  • Transformer and Switchgear Services
  • Protective Relays
  • High and Medium Voltage Circuit Breakers
  • Battery Maintenance