Features • • Universal Voltage − Works on Any 208−480V System Protects Against: Phase Loss Phase Reversal Phase Unbalance (Adjustable 2−10%) Undervoltage (Adjustable 80−95%) Overvoltage (Fixed at 110%) User−Selectable Phase Unbalance and Undervoltage Settings User−Adjustable Time Delay Drop−Out on Undervoltage LED Indicates both Normal and Fault Conditions Compatible with most Wye or Delta Systems Compact 8−Pin Octal Plug−In Case • • • • • R68 Series Phase Monitoring, SPDT, 10 Amp, AC Relay. D62 3.000 (77.0) 2.900 (74.0) SPDT, 1 Form “C” Phase “B” 4 Phase “A” 5 Phase “C” Manual Reset 3 6 2 7 1 8 2.400 (60.96) 1.770 (44.95) LED Status Table * Electrical Specifications LED Status Green Steady Green Flashing Red Steady Red Flashing Amber Steady Amber Flashing Green/Red Alternating Indicator Normal/Relay ON Power Up/Restart Delay Unbalance Undervoltage/Overvoltage Reversal Loss Undervoltage/Overvoltage Trip Pending Red/Amber Alternating Nominal Voltage Set Error * Thi table is on the side of all units for easy reference. Contact Rating: 10 Amps resistive at 240VAC/30VDC, 1/2 HP at 120/240VAC Life: 100,000 operations at full load Mechanical Life: 10,000,000 operations at no load Input Nominal Input voltage: See Chart Steady state input current: See Chart Operational Characteristics OPERATION Phase Monitoring Relays will protect against premature equipment failure caused by voltage faults on three−phase systems. These devices protect against unbalanced voltages or single phasing regardless of any regenerative voltages. The relay is energized when the phase sequence and all voltages are correct. Any one of four fault conditions will de−energize the relay. Re−energization is automatic upon correction of the fault. An LED indicates normal and tripped conditions. AC OPERATED NTE Type No. Nom. Voltage Contact Arr. R68−5A10−480 208−480VAC SPDT Adjustable Under Voltage Drop−out Input Cur. Nom. 80−95% nom. vltg. 50mA Max. Response Times: . . Power Up: 2 sec. fixed Restart After Fault: 1−300 sec. adjustable Drop−Out Due Fault: Phase Loss & Reversal: 100ms fixed Phase Unbalanced: 2 sec. fixed Undervoltage: 0.1 − 20 sec. adjustable Overvoltage: Fixed Time Based on Inverse Time Curve Hysteresis: 2 − 3% Load (Burden): Less than 3VA Protection Indicator LED: See LED Status table Reset: Automatic upon correction of fault. When a N.C. switch is wired across the manual reset terminals (Pin5 & Pin6), the unit switches to manual reset mode and remote manual reset is available. Environmental Characteristics Max. Contact Cur. @ 30VDC or 240VAC Diag No. 10A D62 Operating: −28°C to +65°C ACCESSORIES MOUNTING STYLES DESCRIPTION NTE TYPE NO. SURFACE MOUNT 8−PIN OCTAL R95−101 PANEL MOUNT 8−PIN OCTAL R95−118 DIN RAIL MOUNT 8−PIN OCTAL R95−113 74 NTE Electronics, Inc. Voice (973) 748−5089 FAX (973) 748−6224 http://www.nteinc.com