Summary of Contents for RPS LJ12
- Page 1 INSTRUCTION MANUAL Relay Associates Type LJ - High Speed Auxiliary Relays LJ12 LJ22 LJ32 Relay Associates brand is owned by Relay & Power Systems APRIL 2017 | VERSION 1.3 Page 1 of 21...
- Page 2 TABLE OF CONTENTS GENERAL DESCRIPTION LJ RELAY CONFIGURATION AND ORDERING INFORMATION APPLICATION SPECIFICATIONS AND RATINGS CONTACT RATING FOR LJ RELAYS PER ANSI C37.90 RELAY COIL AND OPERATING SPECIFICATIONS TARGET ELECTRICAL SEAL-IN OPTION RECEIVING INSTALLATION ADJUSTMENTS TESTING PROCEDURES ELECTRICAL OPERATION MANUAL OPERATION TEST SWITCHES TYPICAL TERMINAL BLOCKS STANDARD WIRING DIAGRAM...
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Page 3: Table Of Contents
LIST OF TABLES TABLE 1: MODEL IDENTIFICATION / ORDERING INFORMATION TABLE 2: AVAILABLE LJ RELAY MODEL NUMBERS TABLE 3: EXAMPLES 48V DC STANDARD MODELS TABLE 4: EXAMPLES 125V DC STANDARD MODELS TABLE 5: EXAMPLES 250V DC STANDARD MODELS TABLE 6: CONTACT RATINGS TABLE 7: RELAY SPECIFICATIONS TABLE 8: CUTOUT DIMENSIONS (INCHES) FOR FLUSH CASES LIST OF FIGURES... - Page 4 General Description The LJ relay is a high speed, high inertia auxiliary relay designed to operate in 4 milliseconds*. The relay can be configured with any combination of two (2), six (6) or ten (10) contacts normally open or normally closed contacts. The dustproof, all aluminum case is available in both flush and projection mount configurations .
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Page 5: Table 1: Model Identification / Ordering Information
Number of Contacts Two Contact Units (see note 3) Six Contact Units Ten Contact Units Standard Size All excluding LJ12 & LJ32 LJ12 & 32 only Operating DC Voltage 250 Volt DC Operating Coil 125 Volt DC Operating Coil 48 Volt DC Operating Coil... -
Page 6: Table 2: Available Lj Relay Model Numbers
5 - Five Normally Closed Co ntacts 3 - Projection Mo unt Cas e, No Test Switches or Target 2 - Six Contacts S - Standard Size (LJ12 & LJ32 only) C - 48 Volt DC Operating Coil N - No Seal-In... -
Page 7: Table 4: Examples 125V Dc Standard Models
TABLE 4. EXAMPLES 125V DC STANDARD MODELS 1 - Flush Case, with Target, no Test Switches 2 - Six Co nta cts S - Standard Size (LJ12 & LJ32 only) A - 250 Volt DC Operating Coil N - No Seal-In... -
Page 8: Table 6: Contact Ratings
Application LJ auxiliary relays are mainly applied in protective relay high speed tripping schemes in electric utility and industrial substations . LJ relays are also suitable for control, switching and general purpose applic ations. Specifications and Ratings In tests conducted by an independent lab, the LJ relay was found to meet or exceed the Fast Transients and Surge W ithstand requirem ents as defined by ANSI C37.90. - Page 9 Type LJ - High Speed Auxiliary Relays RPS INSTRUCTION MANUAL Operating Data for Continuously Rated LJ Relay Per ANSI C37.90 Coil Operating Holding Typical Operate Operating Circuit Coil Coil Time (ms) N.O. Voltage (DC) Voltage Resistance Resistance Contact (DC) (Ohm)
- Page 10 The recommended wiring for this option is shown in Figure 3. Due to internal space requirements, an LJ12 which is ordered with this option will be supplied in a LJ13 case. (note: reduces...
- Page 11 RPS INSTRUCTION MANUAL Type LJ - High Speed Auxiliary Relays Receiving Upon receipt of the relay, inspect the relay to verify that its model number agrees with the requisition. Also check for damage which may have been sustained in transit. If damage is evident, file a claim with the transportation company and notify your supplier or Relay &...
- Page 12 Testing Procedures Electrical Operation The relay can be tested by applying a rated DC voltage source to the coil circuit. W hen the voltage source is applied, a low resistance “operate” coil is energized to enable the high speed operation. W hen the relay picks up, a high resistance “holding”...
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- Page 14 Standard Wiring Diagram Page 14 of 21 FIGURE 5. STANDARD WIRING DIAGRAM (EXCLUDING LJ4X SERIES)
- Page 15 Electric Seal in Wiring Schematic FIGURE 6. ELECTRICAL SEAL IN WIRING DIAGRAM Page 15 of 21...
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Page 16: Table 8: Cutout Dimensions (Inches) For Flush Cases
Panel Cutout And Drilling For Semi-Flush Cases .125” rad. TABLE 8. CUTOUT DIMENSIONS (INCHES) FOR FLUSH CASES: .221” dia.(4 places) Page 16 of 21 (4 places) FIGURE 7. PANEL CUTOUT... - Page 17 Projection Unit Mounting Footprints FIGURE 8. PROJECTION MOUNT DRILLING DIMENSIONS Page 17 of 21...
- Page 18 Left to Right : the 2 contact LJ41, the 6 contact LJ42 and the 10 contact LJ43 Page 18 of 21...
- Page 19 Page 19 of 21 FIGURE 9. LJ41, LJ42, AND LJ43 DRAWING...
- Page 20 Notes: Page 20 of 21...
- Page 21 Type LJ - High Speed Auxiliary Relays RPS INSTRUCTION MANUAL About Us Relay & Power Systems (RPS) is a full-service engineering and registered ISO manufacturing resource, serving clients who produce, deliver and consume medium & high voltage electrical power throughout the Northeast and Mid-Atlantic US.
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