NEW MDB 501Z Overload/Undercurrent/Phase Loss/unbalance/earth fault/overvoltage/undervoltage Motor Protection Relay Protector

Product Overview

Description

For 100-999A type,the relay should couple with external CT and set the CT ratio.

LCD Intelligent Motor Protection Relay                            

MDB-501Z

 

♦ Features

-- Compact modular size

-- Built-in LCD and keypad afford a precise,digital setting

-- Measurement error≤1%

-- Three-phase monitoring of short-circuit, locked-rotor,overcurrent, undercurrent, phase loss, current unbalance

-- 1 or 2 phase monitoring of overvoltage, undervoltage

-- Earth ground fault (should couple with ZCT)    

-- RS-485 communication port (optional)  

-- 4-20 mA analog output (optional) 

-- Separated output contacts, two for trip,one for alarm

-- LCD showing status indication

-- Fault recording with last 3 faults

 

 ♦ Protective Functions

  -- Short-circuit       -- Locked-rotor         -- Overcurrent        -- Undercurrent

  -- Phase loss         -- Phase unbalance     -- Overvoltage        -- Undervoltage

  -- Ground fault

 

♦ Typical Applications

 -- Pumps  -- Fans  -- Refrigeration Units  -- Blowers         

-- Motors   -- Compressors   -- Lifts,Elevators   

-- Cranes   -- Mining excavators and conveyors

 

♦ Technical data 

Model	MDB-501Z
Structure	integrative
Power supply	AC220V,AC380V,50/60Hz
Current range	0.3-16A,3-160A,100-999A *For 10-999A type,the relay should couple with external CT and set the CT ratio.
Measurement error	1%
Overcurrent delay	definite time:0.5-60s; inverse time:1-5 trip class
Undercurrent threshold	Same as overcurrent,delay 0.5-60s
Start-up delay	0-200s
Locked-rotor threshold	1.5-8 time of overcurrent,delay 0.5-60s
Short circuit threshold	3-22 time of overcurrent,delay≤50ms
Current unbalance threshold	10-50%,delay 0.5-60s
Phase loss delay	0.5-60s
Ground fault threshold	30mA-2.5A,delay 0.5-60s
Overvoltage threshold	65-690V,delay 0.5-60s
Undervoltage threshold	65-600V,delay 0.5-60s
Overload alarm threshold	20-100%,delay 1s
Auto-reset time	0.1-30 minutes
Auto-reset count	1-10
Reset mode	Manual / Auto /power cycle
Output contacts	Trip:1NO+1NC,Alarm:1NO
Contact capacity	5A/AC220V,3A/AC380V(Resistive)
Dimensions (L x W x D)	90×70×106.5mm
Mounting	Din rail & screw fixing

 

♦Wiring diagram