Newasia Motor Protector Series - User Manual

1
Motor Protector Series Operating Instruction (V1.0)
（NA704L、NA708L、NA712L）
 Main Functions
 Current display: display three average current, press key to display A、B、C phase current
respectively.
 Underload protecting: when three phase average current lower then setting current, circuit
protects and load opens.
 Overload protecting: when three phase average current exceed rated current, circuit protects and
load opens.
 Deficient-phase protecting: when testing deficient-phase or three phase current unbalance, circuit
protects and load opens.
 Auto reset: when circuit protects and load opens, can set “reset automatically” degree and time,
after some time, switch on load again, if circuit still has malfunction, try several times, then must reset
manually.
¤ Main Technique Index
 Current display range: 0～50A (NA704L),0～100A (NA708L),
0～120A (NA712L),precision ±2%
 Rating current range:
Sort
Min(A)
Max(A)
NA704L
1.0
40.0
NA708L
2
80
NA712L
2
120
 Underload protect action time: 0.5～30s (adjustable)
 Overload protect action time: 0.5～30s (adjustable)
 deficient-phase protect action time: 0.5～30s (adjustable)
 Power supply: AC 220V±10%）
 Operating environment: temperature -10℃～45℃，humidity≤85%.
 Relay contact capability: 2A/250VAC (pure resistive load)
 Executive standard: Q/320585 XYK 03
 Operating Guide
 The meaning of the LED：
LED
light
flash
phase A
Display the current of phase A
-
A、B、C LED no light means
display three phase average
current
phase B
Display the current of phase B
-
phase C
Display the current of phase C
-
Alarm
Circuit protecting, Load
opens
Circuit protects ever, but
already reset automatically
 The meaning of the nixietube display：
In normal, controller displays three phase average current(unit: A), press “SEL（）”, then display
A、B、C phase current respectively. In the alarm state, it displays alarm code.
Alarm codes:
Code
Meaning
Explanation
OL. overflow
Current exceed measure range（NA704L measure range 50A，
NA708L measure range 100A, NA712L measure range 140A）
LAC
underload
Load current lower than setting current
OVL overload Load current exceed rated current
PHA deficient-phase
Deficient-phase or three phase current unbalance
 How to display A、B、C phase current?
Press “SEL（）”then display A、B、C phase current respectively, the correspond LED lights. If
A、B、C three LED is unlighted, mean that controller display three average current.
 How to reset from the alarm state?
When overload or deficient-phase protection occurs, alarm LED lights, and protection circuit
activates, the load opens, finally the state of open locks. You can set “reset automatically” degree and time,
after some time, switch on load again, if circuit still has malfunction, try several times, then must reset
manually. In any time, if press “RST（）”, reset from the alarm state.
 How to set the parameter?

Summary

Main Functions

Current Display

Displays three average current, then A, B, C phase current respectively.

Underload Protecting

Protects when average current is lower than setting current and action time.

Overload Protecting

Protects when average current exceeds rated current and action time.

Deficient-Phase Protecting

Protects on deficient-phase or three phase current unbalance.

Auto Reset

Allows automatic reset after protection, with configurable degree and time.

Main Technique Index

Operating Guide

LED Meaning

Explains the status indication of LEDs for phase A, B, C, and Alarm.

Nixietube Display Meaning

Details nixietube display for normal current and alarm codes.

How to Display Phase Current

Instructions on how to view individual phase currents using the SEL button.

How to Reset from Alarm State

Steps for manual or automatic reset from an alarm condition.

How to Set Parameter

Guide on how to access and modify device parameters.

Basic Operating Principle

Current Testing

Describes testing load current using mutual inductors through three holes.

Underload Protection

Explains protection when current is below setting and action time.

Overload Protection

Explains protection when current exceeds rated and action time.

Deficient-Phase Protection

Details protection for phase imbalance or current unbalance.

Reset Automatically

Configuration for automatic reset degree and time after protection.

Wiring Diagram

Notice

Newasia Motor Protector Series Specifications

General

Frequency	50/60Hz
Rated Voltage	380V AC
Overvoltage Protection	Adjustable
Undervoltage Protection	Adjustable
Phase Loss Protection	Yes
Phase Sequence Protection	Yes
Overcurrent Protection	Adjustable
Unbalance Protection	Adjustable