PLMU11工业自动化与控制的监控器-继电器输出规格书PDF中文资料

Description

The PLMU11 continuously measures the voltage of each of

the three phases to provide protection for 3-phase motors

and sensitive loads. Its microcontroller senses under and

overvoltage, voltage unbalance, phase loss, and phase

reversal. Protection is provided even when regenerated

voltages are present. Universal voltage operation and standard

base connection allows the PLMU11 to replace hundreds of

competitive part numbers.

Operation

Upon application of power, a 0.6s random start delay begins and

the PLMU11 measures the voltage levels and line frequency

and selects the voltage range. The output relay is energized

and the LED glows green when all voltages are acceptable

and the phase sequence is correct. LED flashes green during

trip delay, glows red when output de-energizes. Undervoltage,

overvoltage, and voltage unbalance must be sensed for

continuous trip delay before the relay de-energizes.

Re-energization is automatic upon fault correction. The output

relay will not energize if a fault condition is sensed as 3-phase

input voltage is applied. The LED alternately flashes red/green

when phase reversal is sensed. Line voltage is selected with

the knob, setting the over and under voltage trip points. Voltage

range is automatically selected by the microcontroller.

FEATURES BENEFITS

Quick octal 8-pin

mounting

Small footprint with universal mounting: ideal

replacement for hundreds of competitive

part numbers.

Proprietary

microcontroller

based circuitry

Constant monitoring of single-phase, low voltage,

high voltage, voltage unbalance, phase reversal.

LED diagnostics

Quick visual indicator for cause of trip. LED

indications include: normal operation, trip delay,

phase reveral, fault

Isolated, 10A, SPDT

output contacts Allows control of loads for AC voltages

Simple 3-wire connection

for delta or wye systems Allows flexibility across wide range of systems

ASME A17.1 Rule 210.6 Complies with safety codes for elevators,

escalators, moving walkways

NEMA MG1 14:30, 14:35 Complies with safety codes for motors

and generators

IEEE C62.41-1991 Level B Complies with safety codes for surge and

voltage protection