Air Circuit Breaker (ACB) Testing

Salient Features

• Test – Kit for SR 18G/SR18Gi with display
• Operates from 230V AC supply & generates single phase voltage test signals.
• Tests the release for
  1] Phase fault i.e. for overload, short circuit and instantaneous protection
  2] Earth Fault Protection
• Test current multiples
  1] For phase faults: 2.5in, 4.5in, 6.5in,9.5in, 11in, 13in
  2] For earth fault – 0.25in, 0.35in, 0.45in, 0.55in
• Five 7- segments LED display indicates the trip time(two places after decimal

Salient Features

• Test – Kit for SR 18G/SR18Gi/SR21i releases
• Operates from 230V AC supply & generates single phase voltage test signals.
• Tests the release for
  1] Phase fault i.e. for overload, short circuit and instantaneous protection
  2] Earth Fault Protection
• Test current multiples
  1] For phase faults: 2.5in, 4.5in, 6.5in,9.5in, 11in, 13in
  2] For earth fault – 0.25in, 0.35in, 0.45in, 0.55in
• Five 7- segments LED display indicates the trip time(two places after decimal

DN1 Thermo-magnetic release offers reliable protection against overload, short- circuit and earth faults via multicap Cts. with ambient temperature compensation from -5C to 50C. Protection

Overload Protection

• Unique Individual phase O/L setting adjustment helps to avoid the nuisance tripping of ACB’s in unbalance load condition(due to single phase loads) on distribution transformer. Overload pick-up range :0.75 to 1 times In

Short- Circuit Protection

• Two taps on CT’s (working as rating plug) help in selecting operating threshold. Short Circuit pick up range: 5.5 to 7.5 times In with minimum impulsion time of 25 ms to prevent nuisance tripping due to transients

Earth Fault Protection

• Offered with auxiliary earth fault release model. Earth- fault pick uprange: 0.2 too 0.5 times In

Salient Features

• Self powered & true RMS sensing
• Comprehensive Protection
  1] SR18 : Overload(phase) and short- circuit
  2] R18G: Overload(phase),short- circuit and Earth Fault Protection
• True Hot & Cold Characteristics & switchable thermal memory.
• Multi state LED to indicate
  1] Power-on Condition
  2] Test Mode
• Individual fault annunciation through LEDs
• AN1 module for remote fault indication through LEDs with changeover contact for each kind of fault.
• Provision for self diagnostic test (without tripping the breaker)
• Test Kit(SRT-2 ) available for testing the releases
• Conformance to EMI/EMC standards

Salient Features

• Self powered & true RMS sensing
• Comprehensive Protection
  1] SR18 : Overload(phase) and short- circuit
  2] R18G: Overload(phase),short- circuit and Earth Fault Protection
• True Hot & Cold Characteristics & switchable thermal memory.
• Multi state LED to indicate
  1] Power-on Condition
  2] Test Mode
• Individual fault annunciation through LEDs
• AN1 module for remote fault indication through LEDs with changeover contact for each kind of fault.
• Provision for self diagnostic test (without tripping the breaker)
• Test Kit(SRT-2 ) available for testing the releases
• Conformance to EMI/EMC standards

Salient Features

• Self powered & true RMS sensing
• True Hot & Cold characteristics & switchable thermal memory
• Unique 3 line O-LED display (Organic LED)
• Offers comprehensive protection against overload – Phase & neutral , Short- Circuit, Instantaneous, Earth- Fault
• Setting Overload delay
• Settable Instantaneous setting with provision of OFF
• Individual fault LED indication
• Provision for self diagnostic test
• Conformance to EMI/EMC standards
• Testing through test kit
• Separate vision with Zone Selective Interlocking (ZSI) – SR18Gi with display

Salient Features

• Self powered & true RMS sensing
• Inbuilt Zone Selective Interlocking (ZSI)
• Provision for self diagnostic test
• True Hot & Cold characteristics & switchable thermal memory
• Multi- state LED to indicate
  1] Power On indication
  2] Test mode
• Individual fault annunciation through LEDs
• Provision for AN1 module for remote fault indication through LEDs with changeover contact for each kind of fault
• Direct tripping of breaker- reliable tripping with minimum time delay
• Test kit available for testing the release(SRT-2)
• Realistic hot and cold curves which take into account integrated heating effect
• Conformance to EMI/EMC standards

Salient Features

• True RMS sensing
• Offers comprehensive protection against overload, short- circuit
• High resolution backlit LCD display
• Intelligent Pre- trip alarm to prevent system shutdown
• Password protected settings and commands
• MODBUS RTU protocol with intrinsic RS 485 port
• LED indication for POWER ON, different faults and Pre- Trip alarm
• 2 sets of storable protection settings
• Last 5 trips & 128 event records with time & date stamping
• 3 programmable contacts-1 for micro controller failure, 2 for basic fault annunciation
• 4-relay Contacts for indication of exceeding maximum demand,Pre-trip alarm and control on breaker(closing and opening)
• Rating- plug for precise protection at lower load currents
• Auto- doubling featuresto prevent nuisance tripping
• Thermal reflectivity enables faster tripping on recurrent overloads
• Inbuilt Zone Selective Interlocking
• Provision for Self- diagnostic test
• Conformance to EMI/EMC standards