Symcom 460 SERIES Data Sheet

Protection Relays

Voltage Monitoring Relays

460 SERIES

3-Phase Voltage Monitor

Wiring Diagram

TYPICAL WIRING DIAGRAM FOR MODEL 460 WITH MOTOR CONTROL

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
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
restart delays prevent nuisance tripping due to rapidly fluctuating
power line conditions.

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.

®

output relay

Features & Benefits

FEATURES BENEFITS

Auto-sensing wide
voltage range

Adjustable trip & restart
delay settings

Microcontroller
based circuitry

Advanced LED
diagnostics

Adjustable voltage
unbalance trip setting

Automatically senses system voltage between 190

- 480VAC or 475-600VAC. Saves set-up time

Prevent nuisance tripping due to rapidly fluctuating
power line conditions

Improved accuracy and higher reliability

Quick visual indicator for cause of trip and relay status

Provides reliable protection when regenerative
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

460-14 190-480VAC

460-575 475-600VAC Commonly used in Eastern Canada and on generator units that generate 600 VAC power

460-575-14 475-600VAC

460-15 190-480VAC

460-MR 190-480VAC

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

Equipped with 2 sets of contacts: Form A (NO) and Form B (NC). Used for applications requiring 2 different voltages such as 5VDC
for a PLC input and 115VAC for an alarm

Commonly used in Eastern Canada and on generator units that generate 600 VAC power. Equipped with 2 sets of contacts: Form A
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
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
external manual reset button

© 2016 Littelfuse Protection Relays & Controls

Rev: 1-A-062816

Protection Relays

Voltage Monitoring Relays

460 SERIES

Specifications

Frequency 50/60Hz

Low Voltage (% of setpoint)

Trip 90% ±1%
Reset 93% ±1%

High Voltage (% of setpoint)

Trip 110% ±1%
Reset 107% ±1%

Voltage Unbalance (NEMA)

Trip 2-8% adjustable
Reset Trip setting minus 1% (5-8%)
Trip setting minus 0.5% (2-4%)
460L 6% UB fixed (4.5% reset)

Trip Delay Time

Low, High and
Unbalanced Voltage 1-30 seconds adjustable
460L 4 seconds fixed
Single-Phase Faults
(>25% UB) 1 second fixed

Restart Delay Time

After a Fault 1-500 seconds adjustable
After a Complete Power Loss 1-500 seconds adjustable

Output Contact Rating

Form C
Pilot Duty 480VA @ 240VAC, B300
General Purpose 10A @ 240VAC
Form A & Form B
Pilot Duty 360VA @ 240VAC, B300
General Purpose 8A @ 240VAC

Ambient Temperature Range

Operating -20° to 70°C (-4° to 158°F)
Storage -40° to 80°C (-40° to 176°F)
Maximum Input Power 6 W
Class of Protection IP20, NEMA 1 (finger safe)
Relative Humidity 10-95%, non-condensing per IEC 68-2-3
Ter minal Torque 4.5 in.-lbs.
Wire Type Stranded or solid 12-20 AWG, one per terminal

Standards Passed

Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air
RFI, Radiated 150 MHz, 10V/m
Fast Transient Burst IEC 61000-4-4, Level 3,

3.5kV input power and controls

Surge

IEC IEC 61000-4-5, Level 3, 4kV line-to-line;

Level 4, 4kV line-to-ground
ANSI/IEEE C62.41 Surge and Ring Wave Compliance
to a level of 6kV line-to-line

Hi-potential Test Meets UL508 (2 x rated V +1000V for 1 minute)

Safety Marks

UL UL508 (File #E68520)
CE IEC 60947-6-2
Enclosure Polycarbonate
Dimensions H 88.9 mm (3.5”); W 52.9 mm (2.08”);
D 59.69 mm (2.35”)
Weight 0.7 lb. (11.2 oz., 317.51 g)
Mounting Method 35 mm DIN rail or Surface Mount

(#6 or #8 screws)
460-MR (manual reset) External NO pushbutton required.

© 2016 Littelfuse Protection Relays & Controls

Rev: 1-A-062816