1
2
Use Purpose
NR8-200, NR8-630 electronic overload relay (hereinafter referred to as relay) is applicable to circuits
with frequency of AC 50Hz or 60Hz, rated operating voltage up to 690V and current from 80A to 630A. It is
used for overload protection and phase-failure protection of 3-phase AC motor. It can also be used with
corresponding contactor to act as magnetic starter.
Main Technical Parameters
01
NR8-200
、
NR8-630 Electronic Overload Relay
Table 1 Environmental conditions
Ambient temp. (℃)
Hot and humid atmospheric conditions
Altitude
Pollution class/installation category
-
5℃~+40℃, average temperature should not 35℃ within 24h
Relative humidity should not exceed 50% at +40℃; up to 90% at +20℃;
No influence below 2000m
Class 3/III
2.1
See Table 1 and Table 2 for product technical parameters.
Environmental conditions
Table 2 Technical parameters
Model
Phase-failure protection
Reset function
Release indication
Test function
Emergency stop function
Setting current range (A)
Matching contactor
Auxiliary contacts
Rated insulation voltage Ui
Rated operating voltage Ue
Rated impulse withstand voltage Uimp
Yes
Manual reset
Yes
Yes
Yes
NR8-200
NR8-630
Yes
Manual reset
Yes
Yes
Yes
1NO+1NC
690V
660V/690V and below
6kV
5A
220V/230V 2.5A; 380V/400V 1.5A
220V 0.2A
IP00
80-160
100-200
125-250
200-400
315-630
NC8-115 175
～
NC8-205 500
～
Protection class
Ith
AC-15
DC-13
Auxiliary circuit
