digital motor protector temperature controller

1.Current display 2.Overload protecting 3.Deficient-phase protecting 4.Auto reset 5.Power supply: 9~12V AC

  NA702   Motor Protector Specifications  

  

♦Main Functions

F Current display: display three average current, press key to display A,B,C phase current respectively.

F Overload protecting: when three phase average current exceed rated current, circuit protects and load opens.

F Deficient-phase protecting: when testing deficient-phase or three phase current unbalance, circuit protects and load opens.

F 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

O Current display range: 0~50A, precision ±10%

O Rating current range:  Min(A) 1.0 Max(A) 20.0

O Overload protection action time:  0.5~60s and  (adjustable)

O Deficient-phase protection action time: 0.5~60s (adjustable)

O Power supply: 9~12V AC(use the transformer with the controller,primary voltage 220V±10%)

O Operating environment:  temperature -10C~45C, humidity≤85%.

O Relay contact capability: 2A/250VAC (pure resistive load)

O Executive standard:  Q/320585 XYK 03

& Operating Guide

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

G The meaning of the nixietube display:

In normal, controller displays three phase average current(unit: A), press “SEL(6)”, 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(NA702/704 measure range 50A,NA706/708 measure range 100A)
OVL	overload	Load current exceed rated current
PHA	deficient-phase	Deficient-phase or three phase current unbalance

G How to display A, B,C phase current?

 Press “SEL(6)”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.

G 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.

G How to set the parameter?

The Micro-controller can change the parameter, in order to fit different needs. Using the password can enter into the menu, password is “up down up down up up down”, according to this gradation, in normal temperature state ,press “∧” “∨” during 3 seconds, if the password is right, the screen displays “Fxx”, "xx” is two numbers, means parameter’s code.

Press “ ∧ ”or“∨”for choosing parameter’s code, press “ ∧ ”“∨” at the same time for confirming, then press " ∧ ”or“6”in order to changing the parameter, when the parameters have been adjusted ,press “ ∧ ” “ ∧ ”to confirm.(after adjusted the parameter ,press“ ∧ ” “∨” to return to “Fxx” synchronously, the adjusted parameter is saved.)

 Another way is that press “ ∧ ”“ ∧ ” simultaneously at least 5 seconds, then also enter into parameter setting.

Diagram:

                             

                               

                              

 production process

digital motor protector temperature controller