EC-33 Three Phase Faulted Circuit Indicator

The EC-33 line powered FCI is designed for faulted circuit location in industrial and commercial three phase feeder circuits. The unit features a rugged sealed design for a URD installation, and is provided with a viewing kit for cabinet mounting. The fault indicators for each phase are mounted on a single meter face, and the remote sensors attach with Edison Controls’ easy mounting pull over bail or with a screw type mounting for hot stick application.

To prevent false reset from back feed a 7.5 minute reset delay is built in and the unit is provided with a 30 second inrush restraint to allow the use of standard reclosers. A factory adjustable trip level of 200 to 1000 Amps offer application flexibility. The unit has a twenty year service life.

edisonlogoEdison Controls Faulted Circuit Indicators offer a number of electrical options to meet the changing requirements of modern distribution systems. More extensive use of reclosers, current limiting reactors, and phase correcting capacitor banks etc. make the selection and specification of Faulted Circuit Indicators (FCIs) more complex.

Range of Electrical Options and Specifications:

Single or Three Phase Units – A single phase FCI has a single current sensing core assembly and a single indicator viewing assembly. A three phase unit has three independent sensing cores and one indicator viewing assembly. Three phase units are designed for use on insulated cables in underground applications only.

Current or Voltage Powered Units – FCIs, single or three phase, are powered from the system line current, if the line current is greater than 0.5 amps. For applications where the line current may fall below 0.5 amps during any part of a 24 hour period, voltage powered units must be used.

Reset – Immediate or Delayed – FCIs are available with either immediate or timed reset. The immediate reset mode will reset the unit approximately 75 seconds after normal power is restored. The timed reset will delay the reset pulse for up to 72 hours after normal power is restored.

Inrush Restraint – FCIs are available with or without inrush restraint. Inrush restraint is often used to coordinate with reclosers and is available in two forms – dual trip and delayed trip. Dual trip is used when the inrush current is known. Delayed trip is used when the inrush current is not known or when it may vary over a 24 hour period.

Insulated or Non-Insulated Cables – For uninsulated cables a single phase hot stick unit must be used. For insulated cables either single phase hot stick units, remote indicating units, or three phase units may be used.

Trip Levels and Reset Levels – The trip and reset levels are system dependent and require a reasonable knowledge of operating parameters. The logic charts on pages 2 and 3 are useful in establishing the initial trip and reset levels.

General Specifications

Trip Level: 25 – 3000 A with repeat accuracy of +/- 10%
Reset Level: l.0A standard; 3.0A or 0.5A l00v/230V for secondary voltage reset unit.
Reset Time: resets automatically in one to four minutes after restoration,
unless timed reset is specified.
Trip Response: Normally 1 ms or less; (refer to trip response curve below)
Power requirements: Line powered
Adjacent Field Susceptibility: Immune to adjacent magnetic field tripping
Overload Capability: 40,000A peak per ANSI/IEEE 495-1986
Maximum Continuous Current (Non-trip State):
3.0A reset Models: 800A
1.0A reset Models: 300A
0.5A reset Models: 150A
Environmental Capability: Meets ANSI/IEEE 495-1986
Life Expectancy: 20 years

Trip Response Curves