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Protection & Control
Electromechanical / Single Function

Single Function Relay Products
  • Overcurrent, Synchronism Check, Voltage and Frequency, Differential, Directional, Timing, Distance, Generator, Breaker, Auxiliary
MVAX11 Tripping & Interposing Supervision Relay
  • Supervises the Trip Circuit
  • Continuous Monitoring
  • Visual Indication and alarm initiation
  • Robust and compact design
MVAX12 Supply Supervision Relay
  • Failure of Circuit Breaker Trip Supply
  • Ensures integrity of the protection scheme
  • Visual Indication and alarm initiation
  • Robust and compact design
MVAX21 Trip Circuit Supervision Relay (CB Closed only)
  • Circuit Breaker Trip Circuit supervision
  • Ensures integrity of the protection scheme
  • Visual Indication and alarm initiation
  • Robust and compact design
MVAX31 Trip Circuit Supervision Relay (CB Open or Closed)
  • Circuit Breaker Trip Circuit supervision
  • Open circuit trip coil or trip circuit wiring failure
  • Can be used with Pilot Wires
  • Visual Indication and alarm initiation
  • Robust and compact design
MVAX91 Trip Circuit Supervision Relay With Preclosing Supervision
  • Three Trip Circuit Supervision Relays in one case.
  • Simple and robust construction.
  • Ensures protection scheme integtrity
MMLB Test Plug
  • Facilitates Monitoring and Secondary Injection Test
  • Designed for 4mm stackable, retractable, shrouded plugs
  • Finger safe protection
  • Used with MMLG Test Module
MMLG Test Module
  • Provides Monitoring and Secondary Injection Test facilities
  • 14 independent circuits
  • Shorting links when used in Normal Service
  • Used with MMLB Test Plugs
PRIMA
  • Compact voltage auxiliary relay with optional test feature
  • Suitable for DIN, rack or panel mounting
  • Instantaneous or time delayed operation
MVAA13– One Unit, hand reset Auxiliary Relay
  • Voltage operated auxiliary Relay
  • Available in single (MVAA13) element models
  • Hand reset Contacts with optional flag indicator
  • Selection of standard and heavy duty contact configurations
  • Low Burden, Mechanically robust
MVAA16– One Unit, high Speed Self reset Auxiliary Relay
  • High Speed auxiliary relay
  • Voltage operated, low burden
  • Compact design
MVAA21– Two Units, self-reset Auxiliary Relay
  • Voltage operated auxiliary Relay
  • Available in single (MVAA11) or dual (MVAA21) element models
  • Self-reset Contacts with optional flag indicator
  • Selection of standard and heavy duty contact configurations
  • Low Burden, Mechanically robust
MVAA23– Two Units, hand reset Auxiliary Relay
  • Voltage operated auxiliary Relay
  • Available in dual (MVAA23) element models
  • Hand reset Contacts with optional flag indicator
  • Selection of standard and heavy duty contact configurations
  • Low Burden, Mechanically robust
MVAJ – Tripping Relay High or Low Burden
  • Available with a wide range of features and configurations
  • Can be applied to all types of tripping schemes
  • Designed to directly operate circuit breaker trip coils
  • Highly reliable hinged armature construction
P991 – Test Block
  • Test module with provision for 14 circuits (cassettes)
  • Testing is simplified and quickly performed
  • CT short-circuiting is performed safely within the block