Protection Relays Voltage Monitoring Relays 460 SERIES 3-Phase Voltage Monitor Description The 460 is a 3-phase voltage monitor that protects 190-480VAC or 475-600V, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically senses line voltage. This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions such as low, high, and unbalanced voltage, loss of any phase, and phase reversal. When a harmful condition is detected, the MotorSaver output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (restart delay). The trip and Wiring Diagram restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. TYPICAL WIRING DIAGRAM FOR MODEL 460 WITH MOTOR CONTROL All 460 models feature adjustable 1-30 second trip delay, 1-500 second restart delay, 2-8% voltage unbalance trip point, and one form C contact except where noted below. Features & Benefits FEATURES BENEFITS Auto-sensing wide Automatically senses system voltage between 190 voltage range - 480VAC or 475-600VAC. Saves set-up time Adjustable trip & restart Prevent nuisance tripping due to rapidly fluctuating delay settings power line conditions Microcontroller Improved accuracy and higher reliability based circuitry Advanced LED Quick visual indicator for cause of trip and relay status diagnostics Adjustable voltage Provides reliable protection when regenerative unbalance trip setting voltage is present Ordering Information MODEL VOLTAGE DESCRIPTION 460 190-480VAC Automatically senses line voltage, adjustable 1-30 second trip delay, 1-500 second restart delay, and 2-8% voltage unbalance trip point 460-L 190-480VAC Fixed 4 second trip delay and 1 second for single-phase faults, and fixed 6% voltage unbalance trip point Equipped with 2 sets of contacts: Form A (NO) and Form B (NC). Used for applications requiring 2 different voltages such as 5VDC 460-14 190-480VAC for a PLC input and 115VAC for an alarm 460-575 475-600VAC Commonly used in Eastern Canada and on generator units that generate 600 VAC power Commonly used in Eastern Canada and on generator units that generate 600 VAC power. Equipped with 2 sets of contacts: Form A 460-575-14 475-600VAC and Form B Equipped with 2 sets of Form A (NO) contacts. Used on applications where two different units are to be controlled at once such as a 460-15 190-480VAC unit that has separate contacts for a compressor and a fan Equipped with a 2-prong connection for a normally open push button mounted outside the panel. Used in applications requiring an 460-MR 190-480VAC external manual reset button 460-VBM 190-480VAC Fixed 6% voltage unbalance trip point. User adjustable low and high voltage trip points 460-400HZ 190-480VAC For use with 400Hz power supply 460-OEM 190-480VAC Bulk package of 460, 20 units 460L-OEM 190-480VAC Bulk package of 460-L, 20 units 2018 Littelfuse Protection Relays & Controls Rev: 1-A-081718 wwwwww.littelfuse.com/.littelfuse.com/460Protection Relays Voltage Monitoring Relays 460 SERIES Ambient Temperature Range Specifications Operating -20 to 70C (-4 to 158F) Frequency 50/60Hz Storage -40 to 80C (-40 to 176F) Low Voltage (% of setpoint) Maximum Input Power 6 W Trip 90% 1% Class of Protection IP20, NEMA 1 (finger safe) Reset 93% 1% Relative Humidity 10-95%, non-condensing per IEC 68-2-3 High Voltage (% of setpoint) Terminal Torque 4.5 in.-lbs. Trip 110% 1% Wire Type Stranded or solid 12-20 AWG, one per terminal Reset 107% 1% Standards Passed Voltage Unbalance (NEMA) Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air Trip 2-8% adjustable RFI, Radiated 150 MHz, 10V/m Reset Trip setting minus 1% (5-8%) Fast Transient Burst IEC 61000-4-4, Level 3, Trip setting minus 0.5% (2-4%) 3.5kV input power and controls 460L 6% UB fixed (4.5% reset) Surge Trip Delay Time IEC IEC 61000-4-5, Level 3, 4kV line-to-line Low, High and Level 4, 4kV line-to-ground Unbalanced Voltage 1-30 seconds adjustable ANSI/IEEE C62.41 Surge and Ring Wave Compliance 460L 4 seconds fixed to a level of 6kV line-to-line Single-Phase Faults Hi-potential Test Meets UL508 (2 x rated V +1000V for 1 minute) (>15% UB) 1 second fixed Safety Marks Restart Delay Time UL UL508 (File E68520) After a Fault 1-500 seconds adjustable CE IEC 60947-6-2 After a Complete Power Loss 1-500 seconds adjustable Enclosure Polycarbonate Output Contact Rating Dimensions H 88.9 mm (3.5) W 52.9 mm (2.08) Form C D 59.69 mm (2.35) Pilot Duty 480VA 240VAC, B300 Weight 0.7 lb. (11.2 oz., 317.51 g) General Purpose 10A 240VAC Mounting Method 35 mm DIN rail or Surface Mount Form A & Form B ( 6 or 8 screws) Pilot Duty 360VA 240VAC, B300 460-MR (manual reset) External NO pushbutton required. General Purpose 8A 240VAC Disclaimer Notice Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer. 2018 Littelfuse Protection Relays & Controls Rev: 1-A-081718 wwwwww.littelfuse.com/460.littelfuse.com/