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SIGMA plus

Short-Circuit and Earth Fault Indicator

Product Features

  • Retrofit solution for old devices without replacing existing current transformers
  • Can be adjusted to all common Horstmann current transformers
  • Indication by high-intensity LEDs with a viewing angle of 180 degrees
  • Load-dependent self-adjustment or fixed setting
  • Single and double flash mode for operation in radial and ring networks
  • No external power supply required

The SIGMA plus device features all the functions provided by the SIGMA und SIGMA F+E devices thus capable of being used as a short-circuit indicator or as a combined short-circuit and earth fault indicator.

It is primarily intended to allow for changing existing indicators and to replace old devices that have reached their lifetime with new ones.– WITHOUT REPLACING CURRENT TRANSFORMERS ALREADY EXISTING IN THE SWITCHGEAR INSTALLATION!

The SIGMA plus features a selection switch which is used to adapt the device to all current transformers of the ALPHA, DELTA, GAMMA and SIGMA series.

 

Equipment set:

  • 1 Display unit (plug-in or surface mount housing)
  • 3 Short-circuit current transformers, or
  • 2 Short-circuit current transformers + 1 summation current transformer

Technical Data

Technical Data

SIGMA plus

Short-circuit indicator

Earth fault indicator

I>> Short-circuit trip current

(100), 200, 300, 400, 600, 800, 1,000 A, fixed settings

Self-adjustment as a function of the operating current (IL):
IL < 100 A ⇒ I>> = 400 A, IL > 100 A ⇒ I>> = 4 x IL

tI>> Response delay

40, 80, 200, 300 ms

IE> Earth fault trip current

20, 40, 60, 80, 100, 120, 160 A

tIE> Response delay

80, 160 ms

Accuracy

±15 %

Indication

short-circuit: 3 red LEDs (L1, L2, L3)
short-circuit / earth fault: 3 red LEDs (L1, E, L3)

Reset

  • Manual reset
  • Automatic time reset: 2, 4, 8, 24 h
  • Remote reset
  • Current restoration

Remote signal

2 Relay contacts

Relay contact

Potential-free permanent and momentary contact (1 s), adjustable

Contact capacity:
230 V AC/1 A/62.5 VA max.
220 V DC/1 A/60 W max.

Power supply

Long-life lithium cell, lifetime ≥20 years,
total flashing time >1,000 h

Housing

Polycarbonate, IP40 (Plug-in housing), IP65 (surface mount housing)

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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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

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

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

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

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49-6011-043
Summation current transformers

  • For short-circuit indicator Sigma plus
  • Summation current transformers for installation on cables
  • For conductor Ø 40 - 115 mm
  • Cable length 3 m

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49-6013-016
Summation current transformers

  • For short-circuit and earth fault indicator SIGMA plus
  • Summation current transformers for SF6-insulated installations
  • For conductor dia. 280 x 50 mm, oval
  • Cable length 3 m

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49-6013-028
Summation current transformers

  • For short-circuit and earth fault indicator Sigma plus
  • Summation current transformers for air-insulated installations
  • For conductor dia. 350 x 50 mm, oval
  • Cable length 3 m

more...
49-6013-027

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

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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

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49-9090-016
Spring clip

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

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49-9090-018
Spring clip

Spring clip suitable for 3 mm front plate thickness

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49-9090-019

Dimensioned Drawings

Product

Note Item Number

in plug-in housing

Item Number37-3110-001

in surface mount housing

Item Number37-3510-001

in plug-in housing with external power supply (AC/DC)

Item Number37-3120-001

in surface mount housing with external power supply (AC/DC)

Item Number37-3520-001


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