CHINT NR2-25 User Manual

01
Use Purpose
1
NR2 series thermal overload relay (hereinafter referred to as thermal
relay) is applicable to circuits with frequency of AC 50Hz or 60Hz, rated
operating voltage up to 690V and current from 0.1A 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
2
Table 1 Environmental conditions and
technical parameter of main circuit
Environmental conditions
Ambient temp. (℃)
Hot and humid
atmospheric conditions
-5℃~+40℃, average temperature should not
exceed +35℃ within 24h
Relative humidity should not exceed 50% at
+40℃; up to 90% at +20℃
Pollution class/installation category
Altitude
No influence below 2000m
Class 3/Ⅲ
Table 2 Key technical parameters
Model
Phase-failure protection
Manual and automatic reset
Temperature compensation
Tripping indication
Test button
Stop button
Setting current range (A)
Matching mounting base
Rated insulation voltage Ui
NR2-
11.5
NR2-
25
NR2-
36
NR2-
93
NR2-
150
NR2-
200
NR2-
630
Yes
Yes
Yes
Yes
Yes
Yes
0.1-13
MB-1
Yes
Yes
Yes
Yes
Yes
Yes
0.1-25
MB-2
Yes
Yes
Yes
Yes
Yes
Yes
23-36
MB-3
Yes
Yes
Yes
Yes
Yes
Yes
23-93
MB-4
Yes
Yes
Yes
Yes
Yes
Yes
80-150
—
Yes
Yes
Yes
Yes
Yes
Yes
80-200
—
Yes
Yes
Yes
Yes
Yes
Yes
160-630
—
690V

CHINT NR2-25 Specifications

General

Brand	CHINT
Model	NR2-25
Category	Relays
Language	English