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Alpha E

The ALPHA E device is a short-circuit indicator. It is designed to detect, dis- play and remotely indicate short-circuit faults in medium voltage distribution networks.

Short-Circuit Indicator

Product Features

  • Adjustable trip currents
  • Flag-type indication (black/red)
  • Remote signal

Your advantages

  • Remote reset

The ALPHA E device is a short-circuit indicator. It is designed to detect, dis- play and remotely indicate short-circuit faults in medium voltage distribution networks.

The indication is tripped by a short-circuit current and remains active until the device is reset.

 

Equipment set:

  • 1 Display unit

  • 3 Short-circuit current transformers


Technical Data

Technical Data

ALPHA E

Short-circuit indicator

Earth fault detection method Earth short-circuit

I>> Short-circuit trip current

400, 600, 800 or 1,000 A, adjustable

tI>> Response delay

100 ms, no tripping at <20 ms

Accuracy

±15 %

Indication

3 Display elements (black/red), bi-stable type, for L1, L2, L3

Remote signal/communication

1 Relay contact

Relay contact

Potential-free permanent and momentary contact (>100 ms), adjustable
Contact capacity:
230 V AC/1 A/62.5 VA max.
220 V DC/1 A/60 W max.

Reset

  • By button

  • Remote reset: 12 – 60 V AC/DC ±10 %

  • Automatic time reset: 2 or 4 h, adjustable

Power supply

  • CT powered

  • Internal power supply: Long-life lithium cell, lifetime ≥20 years

Housing

Polycarbonate, IP40

Temperature range

-30 to +70 °C

Accessories

Current transformers

Phase current transformers for installation on pole plates

  • For short-circuit indicator types Alpha M, Alpha E, Sigma plus
  • For switchgear manufacturer ABB SafeRing, SafeLink, RGC, SafePlus

more...
49-6012-009
Phase current transformers for installation on pole plates

  • 1 set consisting of 3 short-circuit current transformers
  • For switchgear manufacturer ABB SafeRing, RGC, Safeplus

more...
49-6012-015
Phase current transformers for installation on pole plates

  • For short-circuit indicator Alpha M, Alpha E, Sigma plus
  • For switchgear manufacturer Driescher MINEX, G.I.S.E.L.A.

more...
49-6012-007
Phase current transformers for installation over bushings

  • 1 set consisting of 3 short-circuit current transformers
  • For switchgear manufacturer EATON/Holec SVS

more...
49-6010-032
Phase current transformers for installation over bushings

  • 1 set consisting of 3 short-circuit current transformers
  • For switchgear manufacturer EATON/Holec XIRIA

more...
49-6010-048
Phase current transformers for installation over bushings

  • For short-circuit indicator types Alpha M, Alpha E, SIGMA plus
  • For switchgear manufacturer Ormazabal GA/GAE, GE

more...
49-6010-011
Phase current transformers for installation over bushings

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus
  • For switchgear manufacturer Schneider Electric RM6

more...
49-6010-044
Phase current transformers for installation over bushings

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus
  • For switchgear manufacturer Schneider Electric FBA, GLA, GMA

more...
49-6010-030
Phase current transformers for installation on pole plates

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus
  • For switchgear manufacturer Schneider Electric FBX

more...
49-6012-005
Phase current transformers for installation over bushings

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus
  • For switchgear manufacturer Siemens 8DJ, 8DH, SIMOSEC

more...
49-6010-052
Phase current transformers for installation over bushings

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus
  • For switchgear manufacturer Siemens 8DJH
  • Module transformer

more...
49-6010-060
Phase current transformers for installation on insulated cables

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus

more...
49-6011-040
Phase current transformers for installation on insulated cables

  • For short-circuit indicator types Alpha M, Alpha E, sigma plus

more...
49-6011-043

External Signal Lamps

External Signal Lamp

  • with 3 LEDs (red)
  • 5 m connection cable, for permanent contact, with battery

more...
49-0702-005

Wall-mounted Housings

Wall-mounted housing including earthing bar

  • 290 x 74 x 200 mm (W x H x D)

more...
V49-9001-007-001
Wall-mounted housing including earthing bar

  • 125 x 175 x 125 mm (W x H x D)

more...
V49-9001-004-001
Wall-mounted housing

  • 125 x 75 x 125 mm (W x H x D)

  • Bottom cable entry

more...
49-9001-001
Wall-mounted housing

  • 125 x 75 x 125 mm (W x H x D)

  • Rear cable entry

more...
49-9001-002

Other accessories for short-circuit and earth fault indicators

Disassembly clip

  • For retracting plug-in housings type Alpha, Opto, Earth  and Sigma

more...
49-9090-016
Spring clip

Spring clip suitable for 2 mm front plate thickness (standard)

more...
49-9090-018
Spring clip

Spring clip suitable for 3 mm front plate thickness

more...
49-9090-019

Dimensioned Drawings

Product

Note Item Number

ALPHA E

Item Number30-1715-001


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