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PRIM
Protective Relay Indicator Module
Diagram
Applications The PRIM (Protective Relay Indicator Module) is a complete system designed to enhance transformer protection schemes. It can simultaneously monitor up to four sudden pressure protective relays, trip up to four breakers and provide latching indication of the fault source. Features •  Accepts Inputs from up to Four Protective Devices •  Simultaneously Trips up to Four Circuit Breakers •  Visual Status Indication of Circuit Breaker Trip Sources – Bright LEDs •  Dual Change of State Required – False Trigger Protection •  Automatic and Manual Modes •  Built-in Test Switch Allows Circuit Isolation for Start-Up and Test •  19" Rackmountable   Benefits •  High Speed Trip Response •  SCADA Compatible •  One Device Performs the Function of Many •  Eliminates Accidental Trips •  Can be Reset Locally or Remotely •  Conserves Panel Space Specifications •  Input Voltage - 125 VDC •  Output Voltage - N/O Contact @ 125VDC @10 amp •  Control Power Requirements - Logic: 125VDC @ 100 Milliamps - LOR/ER 125VDC @10 Amps Nom. •  Ambient Temperature - 0°C to +55°C •  Physical Size - 19.00"W x 5.25"H x 9.75"D Ordering Information Model # Description 650-100 Protective Relay Indicator Module Description The PRIM is an automatic monitoring and control device that accepts inputs from up to four protective relays (either electronic or electro-mechanical) to provide trip capability for as many as four circuit breakers. Using the information from the protective relays, the PRIM can simultaneously trip the four circuit breakers  should a fault be detected. In addition, the PRIM’s electronic logic activates one of four front mounted LEDs to provide  visual indication of the specific protective relay that first initiated the trip operation. This LED remains "ON" until such time that the fault has been cleared from the input device and a reset command is provided. An intelligent electronic device, the PRIM is equipped with logic circuitry that protects against false trigger signals due to accidental shorting or opening of an input contact. This circuitry requires that each of the external protective devices must have two changes of state prior to allowing a trip signal. In other words, the device must  detect a complete change of state on both input contacts, i.e., the Normal Open (N/O) contact must change to Normal Close (N/C) and the Normal Close (N/C) contact must change  to Normal Open (N/O). LEDs replace up to four target relays.